Open to opportunities

Cosmas Onyekwelu

@cosmasonyekwelu

Message

I’m a backend-leaning full-stack engineer building secure, real-time web apps with Node.js and Django.

Nigeria

Message

What I'm looking for

I’m looking for remote work where I can build secure, real-time web applications end-to-end—owning API design, authentication/authorization, data modeling, and testing—while working with a team that values clean architecture, documentation, and production quality.

I’m a backend-leaning full-stack software engineer, building secure web applications with Node.js/Express, Django/DRF, React, PostgreSQL, and MongoDB. I focus on clean architecture, documentation, testing, and production-minded development—so features ship reliably and scale without surprises.

From February 2024 to present, I’ve delivered 6+ end-to-end web products (CRM, real-time social, and fintech dashboards). I own system design through testing and documentation, designing modular REST APIs with consistent validation, error handling, and pagination to make client integrations easier as the product grows.

I’m especially strong in secure authentication and authorization (JWT, httpOnly cookies, RBAC, and optional TOTP/2FA), plus real-time UX using WebSockets. I also model data safely across SQL and NoSQL, and automate regression checks with Postman collections and CI via GitHub Actions.

Experience

Work history, roles, and key accomplishments

Current

Independent Full-Stack Developer

Current

Independent

Feb 2024 - Present (2 years 4 months)

Delivered 6+ end-to-end web products (CRM, real-time social, fintech dashboards), owning system design, implementation, testing, and documentation. Built secure, role-based REST APIs and responsive React frontends with real-time WebSocket UX, plus regression automation using Postman and GitHub Actions.

Django REST Framework React REST APIs PostgreSQL MongoDB RBAC WebSockets

Web Developer Intern

Value Gate Consulting

Oct 2025 - Apr 2026 (6 months)

Contributed to client web applications and internal tools by building scalable backend services and integrating React frontends. Designed secure REST APIs with JWT, RBAC, and input validation, and supported performance improvements across SQL/NoSQL and real-time features.

Django REST APIs JWT RBAC PostgreSQL MongoDB WebSockets GitHub Actions

Full-Stack Web Dev Intern

Tech Studio Academy

Dec 2025 - Feb 2026 (2 months)

Completed an internship building full-stack features for internal platforms and training projects using React, Node.js/Express or Django, PostgreSQL/MongoDB, and WebSockets. Implemented secure authentication (JWT, httpOnly cookies, optional TOTP 2FA), role-based access control, Swagger-documented APIs, and automated regression testing with Postman.

React Vite Node Django MongoDB PostgreSQL WebSockets

Education

Degrees, certifications, and relevant coursework

Univelcity

Backend Development with Python/Django, Python/Django Backend Development

2025 -

Completed Backend Development with Python/Django training at Univelcity from Sep 2025 to Dec 2025, covering Python, Django, PostgreSQL, REST APIs, authentication, and deployment.

Saylor Academy

Software Engineering, Software Engineering

2025 -

Completed Software Engineering training at Saylor Academy from Nov 2025 to Dec 2025, focusing on software design principles, architecture, and engineering best practices.

New Horizons

Back-End Web Development, Back-End Web Development

2025 -

Completed Back-End Web Development training at New Horizons from May 2025 to Aug 2025, covering PHP, Laravel, MySQL, REST APIs, Git/GitHub, Node.js, MongoDB, and AI integration and automation.

Tech Studio Academy

Full-Stack Web Development (JavaScript), Full-Stack Web Development (JavaScript)

2024 - 2025

Completed Full-Stack Web Development (JavaScript) at Tech Studio Academy from Oct 2024 to Feb 2025, covering HTML, CSS, JavaScript, React, Node.js, Express, MongoDB, and Git/GitHub.