Open to opportunities

John Osifo

@johnosifo

Full-stack engineer with 5+ years building production web apps using React, Next.js, TypeScript, Node.js, Java, and Python

Nigeria

Message

What I'm looking for

I seek a collaborative environment that fosters innovation and growth.

Full-stack engineer with 5+ years building production web apps using React, Next.js, TypeScript, Node.js, Java, and Python. Lead frontend development while contributing to backend services in microservices environments. Experienced in startups, shipping features end-to-end, and collaborating with product and engineering teams to deliver high-quality solutions.

Languages: JavaScript, TypeScript, Python, Java, SQL

Frontend: React, Next.js, Redux, RTK Query, TanStack Query, Tailwind CSS, SCSS

Backend: Node.js, Python, Java, SpringBoot, Express, REST APIs, Microservices

Database: PostgreSQL, MongoDB, Redis

Cloud & Tools: AWS Lambda, AWS EC2, Amazon S3, Docker, Git

Experience

Work history, roles, and key accomplishments

Current

Fullstack Engineer | Frontend Lead

Current

Devheit

Oct 2024 - Present (1 year 5 months)

- Lead frontend development for Paydeet, a platform unifying multiple bank accounts.

- Build full-stack features using React, Next.js, Node.js, and Python.

- Integrate third-party/internal APIs for financial data processing and verification

- Conduct code reviews, mentor engineers, and enforce frontend standards.

React TypeScript Next.js Tailwind JavaScript NodeJS Python

Teaching Assistant - Data Science

University of Benin

Jul 2025 - Dec 2025 (5 months)

- Lectured and mentored undergraduate students in Geospatial Data Science and Software Development.

- Taught Python programming, computer vision, and geospatial data processing.

- Designed lab exercises using NumPy, Pandas, GeoPandas, GDAL, Rasterio, Shapely, Keras, and OpenCV.

Python OpenCV Pandas NumPy Keras Geopandas GDAL

Frontend Engineer

WiredAssurance

Nov 2023 - Aug 2024 (9 months)

Led the overhaul of WiredAssurance's frontend, modernizing the codebase, implementing Redux for state management, and utilizing RTK Query for efficient data fetching. Achieved a 40% improvement in performance, scalability, and maintainability.

Next.js JavaScript TypeScript Redux

FullStack Software Engineer

Self Employed

Jul 2023 - Oct 2023 (3 months)

- Built web apps for small businesses using React, Node.js, PostgreSQL, and MongoDB

- Developed REST APIs with authentication and role-based access control.

- Handled full-stack development from setup to deployment

JavaScript TypeScript HTML CSS NodeJS Next.js

Frontend Engineer

Flolog

Feb 2022 - Jun 2023 (1 year 4 months)

Implemented and maintained frontend architecture, ensuring scalability and performance through efficient code implementation, caching strategies, and assets optimization techniques.

Next.js JavaScript TypeScript Redux

Frontend Developer

Lehinet Solutions

Jan 2021 - Jan 2022 (1 year)

Collaborated with cross-functional teams to convert design concepts into interactive, responsive UIs using HTML, CSS, React.js, JavaScript, TypeScript, SCSS, Redux, and Context API.

HTML CSS React JavaScript TypeScript