John Olatubosun
Full-stack engineer specializing in product UIs, NestJS APIs, and distributed systems
Remote · Worldwide
Featured work
View all →Case studies across storefronts, backend APIs, and ops tooling.
2026 · Backend architect
Forge
Event-driven commerce microservices with Redis stock reservations, gRPC services, RabbitMQ outbox events, and saga compensation.
2026 · Full-stack lead
LiveKora Market
Mobile-first headless commerce storefront with a fast home page, SSR catalog, and stock-aware multi-step checkout.
2025-2026 · Full-stack / primary engineer
LiveRable Health
Production hand rehabilitation portal for patients, therapists, and clinic admins, with session analytics, access control, Stripe billing, and Azure hosting.
Skills & tools
frontend
- React
- Next.js
- TypeScript
- Tailwind CSS
- TanStack Query
backend
- Node.js
- NestJS
- Express.js
- GraphQL
- gRPC
- RabbitMQ
languages
- JavaScript
- TypeScript
- Python
databases
- PostgreSQL
- MongoDB
- Redis
- Prisma
testing
- Vitest
- Playwright
- Jest
tools
- Docker
- CI/CD
- Vite
- BullMQ
- Turborepo
About
I ship full-stack product features end to end, from responsive interfaces and design systems through APIs, ledgers, and event-driven backends.
My work spans fintech wallets, multi-merchant marketplaces, and admin tooling where UX quality and backend reliability both matter. Public demos such as Forge, Vault, and Harbor illustrate saga compensation, ledger invariants, multi-tenant isolation, and idempotent webhooks drawn from production work at iNPAY and Linqart.
- →React, Next.js, and NestJS across the full stack
- →Event-driven microservices, ledger invariants, and idempotent payment flows
- →Docker, CI/CD, Redis, RabbitMQ, and PostgreSQL
Projects
View all →Selected case studies spanning commerce UIs, NestJS backends, and admin tooling.
2026 · Backend architect
Forge
Event-driven commerce microservices with Redis stock reservations, gRPC services, RabbitMQ outbox events, and saga compensation.
2026 · Full-stack lead
Harbor
Multi-tenant marketplace with a NestJS API, dual Next portals, refresh-token rotation, KYC uploads, search, and settlement jobs.
2026 · Full-stack lead
LiveKora Market
Mobile-first headless commerce storefront with a fast home page, SSR catalog, and stock-aware multi-step checkout.
Experience
View all →Roles and milestones across product engineering.
Full-Stack Web Developer
Feb 2023 — Feb 2024
234 Web Resources
full-timeFull-stack developer building MERN applications for client projects: React frontends, Node.js/Express APIs, and MongoDB data layers.
Full Stack Engineer
Jun 2024 — Sep 2025
INTECH NG
full-timeFull-stack engineer on iNPAY fintech wallet APIs, anti-fraud integrations, and responsive admin interfaces for multi-currency balances, transactions, and KYC review.
Blog
View all →Notes on full-stack architecture, APIs, and shipping product.
Rank at Write, Diversify at Read: Rebuilding a Marketplace Feed Under Load
Rank once at write. Diversify per view. How a marketplace feed survived filter cardinality and write churn.
Design Tokens in Production: Beyond CSS Variables
Structuring semantic token scales, generating multi-platform outputs, and keeping design and engineering in sync on a production portfolio.
Now
View all →What I'm focused on at the moment.
Updated 2026-06-20
See what I'm focused on right now → Now page