Software Engineer

Code Mentor

Freelancer

  • ISRAEL
  • OLUWASAMI.
Crafting
seamless
user experiences for
businesses, brands, and companies.

ABOUT -Full-stack engineer with 5+ years of experience designing and building scalable, high-performance web applications. Adept at both frontend and backend development with expertise in React, Next.js, Node.js, and TypeScript. Passionate about delivering seamless user experiences through robust UI/UX design, while also proficient in architecting backend services, APIs, and databases. Experienced in leading cross-functional teams, mentoring engineers, and implementing CI/CD workflows in agile environments.

My Projects

Here is a list of some of the most notable Projects I've worked on.

Professional Experience

Here's a highlight of my most impactful professional experiences

Senior Full-Stack Engineer

Cydonia Technology (Lagos, Nigeria)Feb 2022 - PRESENT

Worked exclusively on VerifyMe projects under Cydonia Technology's contract engagement.

Engineered full-stack features with React and Node.js, optimizing performance and maintainability.

Developed scalable UI components and backend endpoints for identity verification and payment flows.

Integrated third-party services and SDKs (e.g., payment gateways like Paystack, Flutterwave) with backend logic.

Led frontend and backend testing efforts with Jest and Postman for comprehensive test coverage.

Conducted internal training on scalable frontend architecture and backend service design.

Backend Engineer (Contract)

UtivaJan 2025 - Dec 2025

Built core backend services for a betting platform, implementing features such as user authentication, wallet funding, bet placement, settlement etc.

Developed and maintained a secure and well-documented REST APIs consumed by web clients and third-party providers, with input validation, idempotency, and consistent error handling

Integrated external payment and KYC services, through the use of asynchronous webhooks

Ensured performance and reliability improvements through the use of caching, database indexing, background jobs etc.

Improved operational excellence by making use of structured logging and high-priority alerts for issues that occur on production, in order to trace and solve open incidents easily

Lead Fullstack Engineer (Contract)

Fonu (Telecommunications Company)May 2022 - Dec 2024

Directed full-stack development using Next.js, React, Node.js, and TypeScript.

Built real-time chat features using WebSockets and backend socket servers.

Designed APIs and services to support scalable mobile and web platforms.

Led cross-functional teams and oversaw both frontend and backend sprints.

Implemented CI/CD pipelines with automated testing and deploy previews.

Achieved a 40% performance improvement through full-stack optimization and code audits.

Full Stack Developer (Contract)

Canary Points Corporate ServiceMar 2022 - May 2022

Delivered end-to-end features for fintech platforms using React and Express.

Built reusable UI components and backend services for account management.

Integrated APIs and implemented role-based access control for various user types.

Collaborated closely with design and product teams to deliver rapid iterations.

Full Stack Developer

Hamsa Technologies (Hanoi, Vietnam)Jan 2019 - Feb 2022

Built Shopify applications and storefronts, developing both client-facing UIs and server-side logic.

Created reusable plugins and backend services with a focus on performance and usability.

Gathered business requirements and delivered tailored technical solutions with quick turnaround.

Send me a message!

Got a question or proposal, or just want to say hello? Go ahead.