A LITTLE ABOUT ME

Curiosity drives me.
Craft defines me.

Hello, I’m Emmanuel. I build digital products with a thoughtful approach to every detail.

Emmanuel Onyenegbutu

Lagos, Nigeria

FrontendBackendFull stackSystem administrationUI/UX design

Frontend

Interfaces with intention.

Experienced Frontend and Software Engineer with over 5 years of experience designing and scaling high-performance web and mobile-responsive applications. Skilled at aligning technical execution with business needs, from optimizing UI/UX with React.js and TypeScript to implementing seamless third-party API integrations. I specialize in transforming complex design systems into elegant, performant web and mobile applications.

React.jsNext.jsTypeScriptTailwind CSSReduxMaterial UI
Download Frontend resume

Backend

Strong foundations. Seamless systems.

Building APIs, data models, and reliable services with Node.js, MongoDB, and Redis.

Node.jsExpress.jsMongoDBRedisAPI design

Full stack

From first idea to final interaction.

Known for combining strong frontend depth (Next.js, Tailwind CSS) with backend versatility (Node.js, Firebase) to deliver scalable, SEO-optimized solutions. Experienced leading development teams in remote environments, mentoring teams, and driving Agile delivery with a focus on maintainable, clean architecture.

Next.jsTypeScriptNode.jsMongoDBFirebase

System administration

System Administrator

I ensure that applications run smoothly in production by adopting modern CI/CD pipelines using GitHub Actions, Docker, and Vercel for automated deployments and continuous integration. My expertise lies in building and maintaining robust infrastructure that developers can rely on.

LinuxDockerAWSCI/CDGitHub ActionsVercel

UI/UX design

UI/UX Designer

Design, for me, is about solving problems through empathy and creativity. I approach every project by deeply understanding user needs through research and testing, then crafting interfaces that feel intuitive and delightful.

FigmaWireframingPrototypingUser ResearchAdobe XDDesign Systems

THE JOURNEY SO FAR

Experience that
shapes the work.

Nov 2021 – June 2025

CapacityBay Inc

Software Engineer

Developed and optimized web and mobile-responsive applications using Next.js and React.js, ensuring high performance.

Led a team of developers in building scalable, maintainable applications, implementing best practices in clean architecture and microservices.

Engineered full-stack applications with Next.js API routes, Node.js, and Express.js, integrating MongoDB and Redis.

Mentored junior developers, conducted code reviews, and improved code quality by enforcing TypeScript, ESLint, and Prettier standards.

Oct 2019 – Oct 2021

Qapabli LLC

Frontend Engineer

Developed and maintained high-performance web applications using Next.js, React.js, and TypeScript.

Implemented real-time features using WebSockets and Firebase Firestore, enhancing user engagement.

Designed and developed a role-based authentication system using NextAuth.js and JWT.

Leveraged Vercel and AWS Lambda for serverless deployments, reducing infrastructure costs.

Dec 2018 – Aug 2019

Liberty Pharmacy US

Frontend Engineer

Utilized ReactJS for dynamic interfaces, optimizing code for improved performance and scalability.

Worked closely with cross-functional teams and contributed to agile development cycles.

Actively engaged in knowledge-sharing sessions and embraced emerging technologies.

Feb 2018

JoolyDiagnostics.com

Frontend Engineer

Designed and developed the MVP of the JoolyDiagnostics website with HTML, CSS, JS, and jQuery.

Implemented a chat feedback feature to the application and worked on SEO optimization.