NJAYFull-Stack Software Engineer
Available for selected engineering engagementsAvailable for selected engineering engagementsAvailable for selected engineering engagementsAvailable for selected engineering engagementsAvailable for selected engineering engagementsAvailable for selected engineering engagementsAvailable for selected engineering engagementsAvailable for selected engineering engagementsAvailable for selected engineering engagementsAvailable for selected engineering engagementsAvailable for selected engineering engagementsAvailable for selected engineering engagements
Portrait of Njay, full-stack software engineer, in a working environment

Ship with confidence.

I am Njay, a full-stack software engineer with nine years of experience delivering production systems for founders and product teams.

Available for selected projects

Open to defined engagements, embedded collaborations, and ongoing engineering partnerships. Writing software professionally for nine years.

Start a project

Selected Projects

(5)

Selected work across editorial platforms, digital commerce, payments, blockchain infrastructure, and full-stack product engineering.

[2024–2026]

View all work
Hubbleads — product screenshot

Hubbleads

A mobile out-of-home advertising network I founded, built around taxi-mounted rooftop LED screens. The platform handles campaign scheduling, route and time-of-day targeting, and verified playback logging — counted impressions instead of estimated ones.

[Year]

2024

[Project Focus]

  • Turn taxi-mounted rooftop LED screens into a measurable out-of-home ad network.
  • Replace estimated OOH reach with counted, logged playback and route/time targeting.
View project
Mondour — product screenshot

Mondour

A design and technology studio I co-founded. Mondour helps businesses launch and grow through brand systems, product interfaces, and the websites that carry them — strategy, design, and engineering as one delivery.

[Year]

2026

[Project Focus]

  • Give founders a studio that can take a brand from an idea to a live product surface.
  • Keep strategy, design, and engineering in one delivery so the public site matches the work.
View project
Cellversity — product screenshot

Cellversity

A science education platform that publishes research-backed stories for curious readers. I designed and built the editorial product — story discovery, subject taxonomy, and a Sanity-powered publishing workflow — and shipped it to production at cellversity.com.

[Year]

2026

[Project Focus]

  • Give readers a clear path from curiosity to a science story they can finish.
  • Give editors a publishing system that can grow subjects, authors, and issues without a rebuild.
View project
Argon — product screenshot

Argon

A production multi-chain payment gateway for AirDAO, Solana, BSC (BEP20), and TON. I architected the backend for wallet operations, on-chain verification, and reliable settlement across heterogeneous networks.

[Year]

2024

[Project Focus]

  • Settle payments across AirDAO, Solana, BSC, and TON from one backend.
  • Verify on-chain transfers without exposing that complexity to the product.
View project
Zhuzh Finance — product screenshot

Zhuzh Finance

A fintech product I co-founded, focused on secure account workflows, transaction orchestration, and backend infrastructure that financial services can operate on with confidence.

[Year]

2026

[Project Focus]

  • Design secure account and transaction workflows for a fintech product.
  • Build backend infrastructure that stays correct as volume and complexity rise.
View project

Services

Available for engagements

Available for defined projects, embedded collaborations, and ongoing engineering partnerships with founders and product teams.

Backend Engineering

I design scalable backend architecture for production systems — GraphQL and REST APIs, payment infrastructure, multi-chain settlement, and identity and access control.

  • API design and architecture
  • GraphQL and REST services
  • Payment and commerce infrastructure
  • Multi-chain settlement systems
  • Identity, security, and access control
  • Node.js, NestJS, Python, and Rust
  • PostgreSQL, MongoDB, and Prisma
  • AWS, Docker, and production observability

Product Engineering

I lead end-to-end product engineering — from the application interface to the services behind it — so teams can launch reliable, production-ready software.

  • End-to-end product delivery
  • Full-stack application development
  • Next.js and React applications
  • TypeScript engineering
  • Web application architecture
  • User interface implementation
  • Performance, reliability, and quality
  • Design-to-engineering collaboration

Discuss the next production system

If you need a full-stack engineer who can own delivery from scope to a reliable production system, I am available to discuss the work.

Start a project

About

Read the full profile

I am Njay, a full-stack software engineer with nine years of experience delivering production systems for commerce, payments, and multi-chain infrastructure.

I work with founders, product teams, and operators who need software that remains reliable in production — APIs, payment flows, and the interfaces those systems support.

Architecture, performance, and security are specified as part of the product, not scheduled as follow-up work.

Portrait of Njay, full-stack software engineer

Experience

Founding, product, and engineering roles across fintech, commerce, payments, and digital platforms.

001Full-Stack EngineerCellversity[Jun 2026 - Aug 2026]
002Backend Engineer and Co-FounderZhuzh Finance[Sep 2025 - Present]
003Software Engineer and FounderHubbleads[May 2024 - Present]
004Software Engineer, Creative Director and Co-FounderMondour[Jun 2026 - Present]
005Software Engineer (Full-Stack)VSCGames[May 2025 - Jun 2026]
006Full-Stack EngineerGameket[Apr 2024 - Present]
007Founder and EngineerArgon Payments[Nov 2024 - Present]