I am a Frontend Software Engineer with 4+ years of experience building responsive web and mobile applications using React, React Native, Vue.js, Next.js, TypeScript, Node.js, and NestJS. I enjoy collaborating with design and engineering teams to implement secure APIs and deliver high-performance solutions that boost user engagement and system efficiency, with experience on greenfield projects and large enterprise healthcare systems. Based in Ikeja, Lagos State, Nigeria, I value maintainable code, thoughtful UX, and performance optimization. I’m comfortable contributing across the stack—from frontend interfaces to backend services and cloud workflows (AWS, Firebase)—and I thrive in fast-paced teams focused on delivering meaningful value to users and healthcare providers.

Ofeimun Mathias

I am a Frontend Software Engineer with 4+ years of experience building responsive web and mobile applications using React, React Native, Vue.js, Next.js, TypeScript, Node.js, and NestJS. I enjoy collaborating with design and engineering teams to implement secure APIs and deliver high-performance solutions that boost user engagement and system efficiency, with experience on greenfield projects and large enterprise healthcare systems. Based in Ikeja, Lagos State, Nigeria, I value maintainable code, thoughtful UX, and performance optimization. I’m comfortable contributing across the stack—from frontend interfaces to backend services and cloud workflows (AWS, Firebase)—and I thrive in fast-paced teams focused on delivering meaningful value to users and healthcare providers.

Available to hire

I am a Frontend Software Engineer with 4+ years of experience building responsive web and mobile applications using React, React Native, Vue.js, Next.js, TypeScript, Node.js, and NestJS. I enjoy collaborating with design and engineering teams to implement secure APIs and deliver high-performance solutions that boost user engagement and system efficiency, with experience on greenfield projects and large enterprise healthcare systems.

Based in Ikeja, Lagos State, Nigeria, I value maintainable code, thoughtful UX, and performance optimization. I’m comfortable contributing across the stack—from frontend interfaces to backend services and cloud workflows (AWS, Firebase)—and I thrive in fast-paced teams focused on delivering meaningful value to users and healthcare providers.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
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Language

English
Fluent

Work Experience

Full Stack Software Engineer at Helium Health
March 1, 2025 - Present
Built React/Next.js features for HeliumOS, HeliumDoc, and HeliumCredit; developed a secure file-upload interface to a 10TB AWS S3 bucket with chunked uploads; built and optimized backend services using Node.js, NestJS, PostgreSQL, and MongoDB; improved dashboard usability with refined UI components and state management; enhanced system performance.
Software Engineer Reviewer at Multiplayer
August 1, 2025 - September 1, 2025
Conducted in-depth technical review of full-stack session recordings generated via the Multiplayer Chrome extension; evaluated accuracy and usability; tested the MCP server with an AI agent to identify and fix bugs.
Frontend Engineer (React) at Equinox Furniture (Cristo Projects)
April 1, 2024 - March 31, 2025
Developed and deployed a React Native mobile app for generating sales receipts and invoices, driving 40% user engagement growth; integrated Firebase/Firestore for storage of 2,000+ invoice records; improved maintainability through performance optimization and clean state management using Redux.
Frontend Engineer (React) at UNIGIG Private University
November 1, 2022 - December 31, 2023
Delivered major sections of the university portal (Student, Admin, Lecturer, Exam Officer, Registration Officer, Parent, and HOD dashboards); implemented secure student authentication using Sanctum Tokens, reducing unauthorized access by 98%; built dashboards, search tools, and profile management features; created a multi-user dashboard and search functionality to access results by year, reducing search times.
Frontend Engineer (Next.js) at Support Plug
June 1, 2022 - October 31, 2022
Built and maintained Next.js applications; redesigned website with SEO best practices; increased organic traffic by 40% and generated 200+ qualified leads per month; improved navigation and load times through code refactoring; standardized reusable components to reduce debugging time by 25%.
AI Engineer (LLM Trainer) at micro1
January 1, 2026 - Present
Contributed to AI and LLM evaluation projects by applying full-stack software engineering expertise to assess, test, and improve large-scale model behavior in real-world engineering scenarios. Completed structured tasks to enhance model accuracy, reliability, and reasoning quality, leveraging frontend and backend experience to validate AI outputs against production requirements and edge cases.
Frontend Engineer (Nextjs) at Support Plug
January 1, 2022 - December 1, 2022
Designed and developed scalable, testable, and maintainable code, adhering to best practices and modular programming principles, improving project delivery timelines by 20%. Managed Support Plug websites and web applications in collaboration with other engineers, overseeing the organization’s website and outsourced services.

Education

Doctor of Pharmacy (PharmD) at University of Benin
January 11, 2030 - January 1, 2024
Bachelor of Pharmacy (B.Pharm) at University of Benin
January 11, 2030 - January 1, 2023
Doctor of Pharmacy (PharmD) at University of Benin – Edo State, Nigeria
January 11, 2030 - January 1, 2024
Bachelor of Pharmacy (B.Pharm) at University of Benin – Edo State, Nigeria
January 11, 2030 - January 1, 2023
Doctor of Pharmacy (PharmD) at University of Benin
January 11, 2030 - January 1, 2024
Bachelor of Pharmacy (B.Pharm) at University of Benin
January 11, 2030 - January 1, 2023

Qualifications

Software Development Training Courses
January 11, 2030 - December 19, 2025
Software and Web Development Foundations Training
January 11, 2030 - January 1, 2022
Web Development Program
January 11, 2030 - January 1, 2021
Javascript Data Structures and Algorithms
January 11, 2030 - January 1, 2022
Software Development Training Courses by LinkedIn Learning/RBC Future Paid Canadian Programme
January 11, 2030 - December 19, 2025
Software and Web Development Foundations Training
January 1, 2022 - December 19, 2025
Web Development Program
January 1, 2021 - December 19, 2025
Javascript Data Structures and Algorithms
January 1, 2022 - December 19, 2025
Software Development Training Courses by LinkedIn Learning/RBC Future Paid Canadian Programme
January 11, 2030 - February 17, 2026
Software and Web Development Foundations Training
January 1, 2022 - February 17, 2026
Web Development Program
January 1, 2021 - February 17, 2026
Javascript Data Structures and Algorithms
January 1, 2022 - February 17, 2026

Industry Experience

Software & Internet, Healthcare, Education, Professional Services, Life Sciences, Computers & Electronics, Media & Entertainment, Other