Anthony.
Available for work

Senior Software Engineer

Crafting digitalproducts that matter.

I build scalable fintech and AI products; from pixel-perfect interfaces to resilient backend systems. 5+ years turning complex problems into clean, maintainable code.

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About
Anthony Muonaka

I'm Anthony a senior engineer who writes clean code and ships.

I'm a Software Engineer with 5+ years shipping production applications across the full stack. I design and build REST APIs with NestJS and Node.js / Express, write data pipelines and microservices in Python, and deliver the frontend in React and Next.js all the way from database schema to deployed product.

On the backend I've built JWT-secured NestJS services with DTO validation and Swagger docs, authored Python ETL scripts processing 10K+ records per run, and designed Node.js APIs powering real-traffic e-commerce. On the frontend I've led architecture at an AI SaaS, shipped fintech payment flows with Paystack, and built design systems teams ship against. I care about clean contracts between layers, meaningful test coverage, and code the next engineer will enjoy owning.

Tech Stack

Frontend

Next.jsReactTypeScriptFramer MotionTailwind CSSZustand

Backend

NestJSFastAPINode.jsTypeORMPostgreSQLRedis

DevOps

DockerGitHub ActionsAWSGCPCI/CD Pipelines
Experience
4 roles

Software Engineer

@ CentricAI (DAVU)

Apr 2024 - Nov 2025 · Full-time · Remote

  • Led frontend architecture for the Centric AI MVP, designing scalable component systems, API contracts, and Storybook libraries — reducing feature delivery time by 35%.
  • Defined and enforced typed API integration contracts with the NestJS backend team, ensuring consistent request/response schemas across all services and sustaining 99.5% uptime.
  • Built Python automation tooling for data seeding, bulk migrations, and test fixture generation — reducing QA setup time by 60%.
  • Drove performance optimisation initiatives (code-splitting, lazy loading, memoization), reducing initial load time by 40% and TTI by 2.8s.
  • Established a testing strategy with Jest (unit + integration), achieving 72% coverage and preventing critical regressions pre-deploy.
Next.jsReactPythonDockerJestTypescriptStorybookd3 / recharts
Selected work

Things I've built.

All on GitHub ↗
Featured

SuperStore

Full-stack MERN e-commerce platform built end-to-end. Designed MongoDB schemas, implemented a Node.js/Express REST API with JWT auth, and developed a responsive React storefront with product management, cart, and order tracking.

Node.js Express MongoDB React Redux toolkit Paypal
Featured

Vault API

Full-stack fintech system built with NestJS. Implemented JWT auth with refresh tokens, RBAC, multi-currency accounts, atomic transactions, KYC workflows, webhook handling (Paystack/Flutterwave), and CI/CD pipelines.

NestJS Next.js TypeScript TypeORM PostgreSQL Docker Paystack
Featured

Nexus Chat

Full-stack real-time communication app built with Next.js and Firebase. Integrated multi-model AI (GPT-4o, Groq, Gemini), voice transcription via Web Speech API, and secure invite-based access.

Next.js 15 Firebase BetterAuth Zustand GPT-4o
Writing

Thoughts on engineering.

Articles on engineering, architecture, and things I've learned shipping at scale.

All articles on Hashnode ↗
Contact

Got a project in mind? Let's talk.

I'm open to full-time roles, freelance contracts, and interesting side projects. Whether it's a fintech system, an AI product, or something I haven't seen yet, send a message.

Email
antonynans@gmail.com
Find me on