Lead Mechanical Systems Engineer - Remote

80100 Nairobi, Nairobi KES85000 Annually WhatJobs remove_red_eye View All

Posted 14 days ago

Job Viewed

Tap Again To Close

Job Description

full-time
Our client is seeking an accomplished Lead Mechanical Systems Engineer to join their advanced, fully remote engineering department. This role requires a seasoned professional capable of overseeing complex mechanical system design, integration, and optimization. You will lead projects from conceptualization to final deployment, ensuring all mechanical aspects meet stringent performance, reliability, and safety standards. Responsibilities include defining system architectures, performing detailed engineering analysis (stress, thermal, dynamics), and selecting appropriate materials and components. You will guide a team of engineers, provide technical mentorship, and collaborate closely with cross-functional departments such as electrical, software, and manufacturing. A key aspect of this role is driving innovation, identifying opportunities for design improvement, and ensuring the efficient execution of projects within established timelines and budgets. The ideal candidate possesses a comprehensive understanding of mechanical engineering principles, extensive experience with advanced simulation tools, and a proven track record of successfully managing complex engineering projects. Exceptional leadership, communication, and problem-solving skills are essential for success in this remote leadership position.

Responsibilities:
  • Lead the design and development of complex mechanical systems and subsystems.
  • Define system requirements and architectural designs.
  • Conduct in-depth engineering analyses, including thermal, structural, and dynamic simulations.
  • Oversee the selection of materials, components, and manufacturing processes.
  • Mentor and guide junior mechanical engineers and technical staff.
  • Collaborate with stakeholders across electrical, software, and manufacturing disciplines.
  • Develop and implement project plans, timelines, and budgets for mechanical systems.
  • Ensure adherence to quality standards, safety regulations, and industry best practices.
  • Troubleshoot and resolve complex technical challenges in mechanical designs.
  • Drive continuous improvement initiatives for mechanical engineering processes and methodologies.
Qualifications:
  • Master's degree in Mechanical Engineering or a related field.
  • Minimum of 8 years of experience in mechanical design, systems engineering, or a related role.
  • Demonstrated experience leading engineering projects and teams.
  • Expertise in engineering simulation software (FEA, CFD, Multibody Dynamics).
  • Proficiency in advanced CAD software and PDM/PLM systems.
  • Strong understanding of thermodynamics, fluid mechanics, solid mechanics, and control systems.
  • Experience with various manufacturing techniques and material properties.
  • Excellent leadership, communication, and interpersonal skills.
  • Proven ability to manage multiple complex projects simultaneously in a remote setting.
  • Familiarity with Agile or Lean engineering methodologies is advantageous.
This role is designated as fully remote. While the operational focus is **Mombasa, Mombasa, KE**, the position allows for work from any location.
This advertiser has chosen not to accept applicants from your region.

Lead HVAC Installation Specialist - Remote

80100 Nairobi, Nairobi KES70000 Annually WhatJobs

Posted 23 days ago

Job Viewed

Tap Again To Close

Job Description

full-time
Our client is seeking a highly skilled and experienced Lead HVAC Installation Specialist to oversee and guide their installation teams. This is a fully remote position, allowing you to manage and strategize installation processes from your home office. You will be responsible for planning, coordinating, and supervising the installation of Heating, Ventilation, and Air Conditioning (HVAC) systems across various commercial and residential projects. Your duties will include developing detailed installation plans, ensuring compliance with design specifications, building codes, and safety standards. You will lead and mentor installation crews, providing technical expertise and troubleshooting support. The role involves managing project timelines, resource allocation, and quality control to ensure successful and efficient installations. A key responsibility will be to conduct site assessments remotely where possible, and to provide clear, concise guidance to on-site teams. The ideal candidate will possess extensive knowledge of HVAC systems, including their design, installation, and maintenance. Proven experience in leading installation teams and managing multiple projects simultaneously is essential. Strong understanding of refrigeration cycles, ductwork design, and electrical controls is required. Excellent communication, problem-solving, and organizational skills are paramount for coordinating effectively in a remote environment. Proficiency with relevant diagnostic tools and project management software is necessary. We are looking for a proactive and detail-oriented individual who can drive high standards of workmanship and client satisfaction. This is a fantastic opportunity to leverage your expertise in HVAC installation and leadership to contribute to significant projects while enjoying the flexibility of a remote role.
This advertiser has chosen not to accept applicants from your region.

Senior Mechanical Engineer - HVAC Systems Design

80100 Nairobi, Nairobi KES840000 Annually WhatJobs

Posted 23 days ago

Job Viewed

Tap Again To Close

Job Description

full-time
Our client, a distinguished engineering consultancy firm, is actively seeking a highly skilled Senior Mechanical Engineer specializing in HVAC systems. This is a fully remote position, enabling you to leverage your expertise in designing advanced heating, ventilation, and air conditioning systems from your home office. You will be instrumental in the conceptualization, design, and implementation of complex HVAC solutions for a wide range of commercial and industrial projects. Your responsibilities will encompass conducting detailed load calculations, developing P&IDs, selecting and specifying HVAC equipment (chillers, boilers, air handling units, etc.), and creating detailed drawings and schematics using CAD software. You will also be responsible for ensuring system performance meets energy efficiency standards and building codes. Collaboration with architects, electrical engineers, plumbing engineers, and project managers will be essential to deliver integrated and optimized building systems. We are looking for a candidate with a comprehensive understanding of thermodynamics, fluid mechanics, and psychrometrics, along with extensive experience in HVAC design principles and practices. Proficiency in HVAC design software (e.g., HAP, Trace 700, AutoCAD) is a prerequisite. Excellent analytical, problem-solving, and communication skills are vital, as is the ability to lead and mentor junior engineers in a remote setting. A Bachelor's degree in Mechanical Engineering or a related discipline from an accredited institution, and a minimum of 7 years of relevant professional experience in HVAC system design, are required. Professional Engineer (PE) registration is a significant advantage. This role offers a fantastic opportunity for a dedicated mechanical engineer to contribute to innovative building projects remotely, shaping the future of sustainable and efficient building environments.
This advertiser has chosen not to accept applicants from your region.

Senior Mechanical Design Engineer - HVAC Systems

80100 Nairobi, Nairobi KES215000 Annually WhatJobs remove_red_eye View All

Posted 23 days ago

Job Viewed

Tap Again To Close

Job Description

full-time
Our client is seeking an experienced Senior Mechanical Design Engineer with a specialization in HVAC systems to join their fully remote engineering team. This role is critical for the design, development, and optimization of advanced heating, ventilation, and air conditioning systems for a variety of applications. You will work on innovative projects, ensuring energy efficiency, performance, and compliance with industry standards. The ideal candidate will possess a strong background in thermodynamics, fluid mechanics, and HVAC system design, with proven experience in using CAD and simulation tools.

Responsibilities:
  • Lead the mechanical design of HVAC systems, including chillers, boilers, air handling units, and distribution networks.
  • Develop detailed 3D CAD models and 2D drawings using SolidWorks, AutoCAD, or similar software.
  • Perform thermal analysis, fluid dynamics simulations (CFD), and stress analysis (FEA) to optimize system performance and reliability.
  • Select appropriate components, materials, and manufacturing processes for HVAC equipment.
  • Ensure designs comply with relevant codes, standards (e.g., ASHRAE), and regulations.
  • Collaborate with electrical and controls engineers to integrate HVAC systems with building automation systems.
  • Oversee prototyping, testing, and validation of HVAC system designs.
  • Troubleshoot and resolve design-related issues during manufacturing and installation phases.
  • Create technical documentation, including design reports, bills of materials, and assembly instructions.
  • Stay current with emerging HVAC technologies, energy efficiency standards, and sustainability practices.
  • Mentor junior engineers and provide technical leadership on complex design challenges.
Qualifications:
  • Bachelor's degree in Mechanical Engineering or a related field.
  • Minimum of 7 years of progressive experience in mechanical design, with at least 4 years focused on HVAC systems.
  • Expertise in SolidWorks, AutoCAD, or similar CAD software.
  • Strong understanding of thermodynamics, fluid mechanics, heat transfer, and psychrometrics.
  • Proficiency in performing CFD and FEA simulations.
  • Knowledge of relevant HVAC codes and standards (e.g., ASHRAE, SMACNA).
  • Experience with building energy modeling software is a plus.
  • Excellent problem-solving, analytical, and critical thinking skills.
  • Strong communication and interpersonal skills, with the ability to work effectively in a remote, collaborative environment.
  • Proven ability to manage multiple design projects simultaneously and meet deadlines.
  • Experience with project management principles is desirable.
This is a fully remote position offering the flexibility to work from anywhere while contributing to critical infrastructure projects, with a focus on applications relevant to diverse climates and environments, including those found around Mombasa, Mombasa, KE .
This advertiser has chosen not to accept applicants from your region.

Senior Mechanical Design Engineer - HVAC Systems (Remote)

80100 Nairobi, Nairobi KES125000 Annually WhatJobs

Posted 7 days ago

Job Viewed

Tap Again To Close

Job Description

full-time
Our client, a leader in sustainable building solutions, is seeking a highly experienced Senior Mechanical Design Engineer specializing in HVAC systems to join their fully remote engineering team. This role is critical for the design and development of energy-efficient and innovative heating, ventilation, and air conditioning systems for a variety of building projects. You will be responsible for conceptualizing, designing, and optimizing HVAC solutions from initial schematic design through to detailed construction documentation. As a remote-first engineer, you will collaborate extensively with architects, electrical engineers, project managers, and clients using advanced CAD software and virtual collaboration platforms. The ideal candidate will possess a strong foundation in thermodynamics, fluid mechanics, and HVAC design principles, combined with expertise in energy modeling and system performance analysis. We are looking for proactive engineers who are committed to sustainable design and can manage complex projects independently in a distributed environment. Key Responsibilities:
  • Lead the design and development of complex HVAC systems for commercial, industrial, and residential buildings.
  • Perform load calculations, system sizing, and equipment selection for heating, cooling, ventilation, and air distribution.
  • Develop detailed engineering drawings, schematics, and specifications using CAD software (e.g., AutoCAD MEP, Revit MEP).
  • Conduct energy modeling and performance simulations to optimize system efficiency and sustainability.
  • Ensure designs comply with relevant building codes, ASHRAE standards, and environmental regulations.
  • Collaborate with cross-functional teams, including architects, electrical engineers, and construction managers, throughout the project lifecycle.
  • Review shop drawings, submittals, and respond to contractor RFIs during the construction phase.
  • Conduct site visits for inspections and to resolve technical issues (may require occasional travel).
  • Troubleshoot and identify solutions for existing HVAC system performance issues.
  • Stay abreast of the latest HVAC technologies, sustainable design practices, and industry innovations.
  • Manage project timelines, deliverables, and client communications related to mechanical engineering aspects.
  • Mentor junior engineers and contribute to the continuous improvement of design processes.
Qualifications:
  • Bachelor's degree in Mechanical Engineering or a related field. A Master's degree or Professional Engineer (PE) license is a significant advantage.
  • Minimum of 7 years of progressive experience in HVAC design engineering.
  • Demonstrated experience in designing HVAC systems for a variety of project types.
  • Proficiency in industry-standard HVAC design software (e.g., HAP, TRACE 700/3D) and CAD/BIM software (e.g., AutoCAD MEP, Revit MEP).
  • Strong understanding of thermodynamics, fluid mechanics, psychrometrics, and building science principles.
  • Knowledge of energy efficiency standards and sustainable design practices (e.g., LEED).
  • Excellent analytical, problem-solving, and critical thinking skills.
  • Strong communication, collaboration, and interpersonal skills, crucial for remote teamwork.
  • Proven ability to manage multiple projects, prioritize tasks, and meet deadlines independently.
  • Experience with energy modeling software is highly preferred.
  • Familiarity with project management tools.
This is an exceptional opportunity to apply your mechanical engineering expertise in a fully remote role, contributing to sustainable building design and innovation, particularly supporting projects in the Mombasa, Mombasa, KE area and beyond.
This advertiser has chosen not to accept applicants from your region.

Remote HVAC Technician - Specialty Systems

80100 Nairobi, Nairobi KES90000 Annually WhatJobs

Posted 3 days ago

Job Viewed

Tap Again To Close

Job Description

contractor
Our client is seeking a highly skilled and independent HVAC Technician with expertise in specialty systems to join their remote technical support team. In this role, you will provide expert advice and troubleshooting guidance to clients and field technicians via virtual channels, resolving complex issues related to heating, ventilation, and air conditioning systems. Your primary responsibility will be to diagnose problems, recommend solutions, and guide users through repair and maintenance procedures without being physically present. This requires exceptional diagnostic skills, a deep understanding of various HVAC components and their interactions, and the ability to clearly articulate technical instructions. You will utilize remote diagnostic tools, interpret schematics and technical manuals, and document all interactions and resolutions accurately. A strong background in commercial and industrial HVAC systems, including refrigeration cycles, electrical controls, and air distribution, is essential. Experience with specific specialty systems, such as cleanroom environments, laboratory ventilation, or industrial process cooling, would be a significant advantage. The successful candidate must possess excellent communication skills, patience, and the ability to remain calm and effective under pressure. You will act as a critical point of contact for resolving challenging technical problems, ensuring minimal downtime for our clients. This is a fully remote position, offering flexibility and the opportunity to apply your specialized knowledge to a wide range of technical challenges across various locations. While the support focus originates from the **Mombasa, Mombasa, KE** area, the work itself is entirely location-independent. This role demands a proactive approach to problem-solving and a commitment to delivering top-tier technical support.
This advertiser has chosen not to accept applicants from your region.

Lead Automotive Software Architect (Remote)

80100 Nairobi, Nairobi KES400000 Annually WhatJobs remove_red_eye View All

Posted 21 days ago

Job Viewed

Tap Again To Close

Job Description

full-time
Our client is looking for an exceptional Lead Automotive Software Architect to spearhead the design and development of cutting-edge software solutions for next-generation vehicles. This is a fully remote position, offering the opportunity to work from anywhere. You will be instrumental in defining the overall software architecture, ensuring scalability, reliability, and performance across complex automotive systems. This includes designing embedded software, in-car infotainment systems, advanced driver-assistance systems (ADAS), and vehicle connectivity platforms. You will lead a team of talented software engineers, providing technical guidance, mentorship, and fostering a collaborative development environment. Key responsibilities include translating complex functional requirements into robust technical designs, selecting appropriate technologies and frameworks, and establishing best practices for software development, testing, and deployment. You will collaborate closely with hardware engineers, product managers, and other stakeholders to ensure alignment with project goals and automotive industry standards (e.g., AUTOSAR, ISO 26262). A deep understanding of software development lifecycles, agile methodologies, and version control systems is crucial. Experience with various programming languages common in the automotive sector (e.g., C++, Python, Java) and a strong grasp of real-time operating systems (RTOS) are essential. You will play a vital role in architecting secure and resilient software solutions that meet stringent automotive safety and cybersecurity requirements. The ideal candidate will have a proven track record of successfully architecting and delivering complex software projects in the automotive domain, coupled with strong leadership and communication skills. A Bachelor's or Master's degree in Computer Science, Electrical Engineering, or a related field, along with significant professional experience, is required. This role is perfect for a visionary architect passionate about shaping the future of mobility and who thrives in a remote, fast-paced environment.
This advertiser has chosen not to accept applicants from your region.
Be The First To Know

About the latest Lead mechanical systems engineer remote Jobs in Nairobi !

Senior Mechanical Systems Design Engineer

80100 Nairobi, Nairobi KES680000 Annually WhatJobs

Posted 14 days ago

Job Viewed

Tap Again To Close

Job Description

full-time
Our client is seeking a highly experienced Senior Mechanical Systems Design Engineer to join their innovative engineering team. This is a fully remote position, offering the flexibility to work from home on exciting projects. The ideal candidate will possess a strong background in mechanical design, thermodynamics, fluid dynamics, and materials science, with a proven ability to design complex systems from conception to production. You will be responsible for creating detailed 3D models and 2D drawings using CAD software (e.g., SolidWorks, CATIA, AutoCAD), performing stress analysis and simulations, and selecting appropriate materials and components. This role requires a deep understanding of manufacturing processes and the ability to collaborate effectively with manufacturing engineers, project managers, and other stakeholders in a remote setting. Responsibilities include troubleshooting design issues, optimizing system performance, and ensuring compliance with industry standards and regulations. The Senior Mechanical Systems Design Engineer will also play a key role in mentoring junior engineers, conducting design reviews, and contributing to the continuous improvement of design processes and tools. Experience with FEA (Finite Element Analysis) and CFD (Computational Fluid Dynamics) software is highly desirable. We are looking for a proactive, detail-oriented individual who thrives in an independent, results-driven remote environment. This is an excellent opportunity for a seasoned mechanical engineer to contribute to cutting-edge projects and advance their career in a flexible, remote-first setting. The role is linked to **Mombasa, Mombasa, KE**, but is a fully remote opportunity. If you are a highly skilled mechanical design expert looking for a challenging and rewarding remote role, we encourage you to apply.
This advertiser has chosen not to accept applicants from your region.

Remote Technical Support Engineer - HVAC Systems

80100 Nairobi, Nairobi KES100000 Annually WhatJobs

Posted 23 days ago

Job Viewed

Tap Again To Close

Job Description

full-time
Our client is seeking a highly skilled Remote Technical Support Engineer specializing in HVAC systems to join their growing team. This is a critical, fully remote role where you will provide expert technical assistance to field technicians, engineers, and customers regarding the installation, operation, troubleshooting, and maintenance of our advanced HVAC solutions. You will be the go-to expert for complex technical queries, ensuring our systems perform optimally and our clients receive exceptional support.

Responsibilities:
  • Provide remote, first-line and second-line technical support for a wide range of HVAC products and systems.
  • Troubleshoot complex technical issues via phone, email, video conferencing, and remote diagnostic tools.
  • Interpret technical documentation, schematics, and performance data to diagnose and resolve system faults.
  • Guide field technicians through installation, repair, and maintenance procedures.
  • Escalate unresolved issues to senior engineers or product development teams, providing detailed information and analysis.
  • Develop and maintain technical support documentation, including FAQs, troubleshooting guides, and best practice articles.
  • Contribute to product improvement by identifying recurring issues and providing feedback to the engineering department.
  • Analyze system performance data to identify potential problems and recommend proactive solutions.
  • Train internal staff and external partners on HVAC system operation and troubleshooting.
  • Ensure timely and accurate logging of all support interactions and resolutions in the CRM system.
  • Stay up-to-date with the latest advancements in HVAC technology and industry standards.
Qualifications:
  • Proven experience in HVAC system design, installation, or technical support.
  • In-depth knowledge of refrigeration cycles, psychrometrics, air balancing, and electrical controls for HVAC systems.
  • Proficiency in reading and interpreting technical drawings, schematics, and blueprints.
  • Experience with diagnostic tools and software for HVAC systems.
  • Strong analytical and problem-solving skills with a methodical approach.
  • Excellent verbal and written communication skills, with the ability to explain technical concepts to diverse audiences.
  • Demonstrated ability to work effectively in a remote environment, managing time and prioritizing tasks independently.
  • A relevant technical certification or degree in Mechanical Engineering, HVAC Technology, or a related field is preferred.
  • Experience with building automation systems (BAS) is a significant advantage.
  • Customer-focused mindset with a passion for providing excellent technical support.
This is an outstanding opportunity to work remotely as a key technical resource, contributing to the success of innovative HVAC solutions.
This advertiser has chosen not to accept applicants from your region.

Lead Mechanical Design Engineer - Aerospace Components

80200 Nairobi, Nairobi KES160000 Annually WhatJobs

Posted 12 days ago

Job Viewed

Tap Again To Close

Job Description

full-time
Our client, a pioneering aerospace manufacturing company, is seeking a highly skilled and visionary Lead Mechanical Design Engineer to join their remote engineering team. This crucial position involves the conceptualization, design, and development of advanced mechanical systems and components for next-generation aircraft and spacecraft. You will lead the design process from initial ideation through to detailed design, analysis, prototyping, and testing, ensuring adherence to stringent industry standards and performance requirements. Responsibilities include utilizing advanced CAD software (e.g., SolidWorks, CATIA) for 3D modeling, creating detailed manufacturing drawings, and performing complex simulations using Finite Element Analysis (FEA) and Computational Fluid Dynamics (CFD) to validate designs. You will focus on optimizing designs for weight reduction, structural integrity, thermal management, and manufacturability. This role requires a deep understanding of material science, stress analysis, aerodynamics, and manufacturing processes relevant to the aerospace sector. You will collaborate closely with systems engineers, manufacturing engineers, and quality assurance teams, providing technical guidance and problem-solving support throughout the product lifecycle. A strong emphasis will be placed on innovation, exploring new materials and design methodologies to push the boundaries of aerospace engineering. The ideal candidate will possess excellent leadership qualities, mentoring junior engineers and fostering a culture of technical excellence. Exceptional problem-solving abilities and meticulous attention to detail are paramount. As this is a fully remote role, proficiency in remote collaboration tools and effective communication in a distributed team environment are essential. You will be instrumental in driving forward the company's technological advancements in aerospace component design.
Responsibilities:
  • Lead the mechanical design of complex aerospace components and systems.
  • Utilize advanced CAD software for 3D modeling and detailed drawing creation.
  • Perform structural, thermal, and fluid dynamic analysis using FEA and CFD.
  • Optimize designs for performance, weight, manufacturability, and cost.
  • Collaborate with cross-functional teams including systems, manufacturing, and quality engineering.
  • Mentor and guide junior mechanical design engineers.
  • Develop design concepts and conduct feasibility studies.
  • Oversee prototyping and testing phases of component development.
  • Ensure designs comply with aerospace industry standards and regulations (e.g., FAA, EASA).
  • Document design processes, analyses, and results comprehensively.
Qualifications:
  • Bachelor's or Master's degree in Mechanical Engineering or Aerospace Engineering.
  • Minimum of 8 years of progressive experience in mechanical design, specifically within the aerospace industry.
  • Expertise in CAD software (e.g., SolidWorks, CATIA, NX) and FEA/CFD tools.
  • Strong understanding of aerospace materials, manufacturing processes, and industry standards.
  • Proven ability to lead design projects and mentor engineering teams.
  • Excellent analytical, problem-solving, and decision-making skills.
  • Exceptional written and verbal communication skills.
  • Demonstrated ability to work effectively in a remote, collaborative environment.
  • Experience with systems engineering principles is a plus.
  • Professional Engineer (PE) license is desirable.
This role is based in Mombasa, Mombasa, KE, but is fully remote.
This advertiser has chosen not to accept applicants from your region.

Nearby Locations

Other Jobs Near Me

Industry

  1. request_quote Accounting
  2. work Administrative
  3. eco Agriculture Forestry
  4. smart_toy AI & Emerging Technologies
  5. school Apprenticeships & Trainee
  6. apartment Architecture
  7. palette Arts & Entertainment
  8. directions_car Automotive
  9. flight_takeoff Aviation
  10. account_balance Banking & Finance
  11. local_florist Beauty & Wellness
  12. restaurant Catering
  13. volunteer_activism Charity & Voluntary
  14. science Chemical Engineering
  15. child_friendly Childcare
  16. foundation Civil Engineering
  17. clean_hands Cleaning & Sanitation
  18. diversity_3 Community & Social Care
  19. construction Construction
  20. brush Creative & Digital
  21. currency_bitcoin Crypto & Blockchain
  22. support_agent Customer Service & Helpdesk
  23. medical_services Dental
  24. medical_services Driving & Transport
  25. medical_services E Commerce & Social Media
  26. school Education & Teaching
  27. electrical_services Electrical Engineering
  28. bolt Energy
  29. local_mall Fmcg
  30. gavel Government & Non Profit
  31. emoji_events Graduate
  32. health_and_safety Healthcare
  33. beach_access Hospitality & Tourism
  34. groups Human Resources
  35. precision_manufacturing Industrial Engineering
  36. security Information Security
  37. handyman Installation & Maintenance
  38. policy Insurance
  39. code IT & Software
  40. gavel Legal
  41. sports_soccer Leisure & Sports
  42. inventory_2 Logistics & Warehousing
  43. supervisor_account Management
  44. supervisor_account Management Consultancy
  45. supervisor_account Manufacturing & Production
  46. campaign Marketing
  47. build Mechanical Engineering
  48. perm_media Media & PR
  49. local_hospital Medical
  50. local_hospital Military & Public Safety
  51. local_hospital Mining
  52. medical_services Nursing
  53. local_gas_station Oil & Gas
  54. biotech Pharmaceutical
  55. checklist_rtl Project Management
  56. shopping_bag Purchasing
  57. home_work Real Estate
  58. person_search Recruitment Consultancy
  59. store Retail
  60. point_of_sale Sales
  61. science Scientific Research & Development
  62. wifi Telecoms
  63. psychology Therapy
  64. pets Veterinary
View All Lead Mechanical Systems Engineer Remote Jobs View All Jobs in Nairobi