I'm Ifeanyi Onyekwelu — a full-stack engineer with 5+ years building production web platforms for fintech, SaaS, and education teams. Currently focused on AI-integrated products — LLMs, LangChain, and workflows that ship.
Current focus
Shipping full-stack web platforms and integrating LLM-powered features — LangChain workflows, RAG over product data, and assistants that feel like part of the UX, not a gimmick.
Over five years as a full-stack engineer, I've shipped products across fintech, SaaS, and education — the kind of codebases where a 2am pager rotation is the real design review. Lately, I'm deep in AI integration: LangChain pipelines, RAG, and LLM features wired into real product flows.
My edge is judgement. I don't just close tickets; I reshape the parts of the system that keep failing, document the why, and leave the codebase in a better state than I found it. I've shipped light Web3 work too — on-chain minting, IPFS — but that's past work, not my day-to-day focus.
Backend architecture
REST & GraphQL APIs, microservices, payment integrations, and databases that scale past MVP without a rewrite.
AI integration
LLM-powered features with LangChain, RAG pipelines, embeddings, and agentic workflows wired into real product UX.
Frontend craft
Typed React and Next.js apps, design systems, and interfaces that stay performant under real-world data loads.
Five years of writing, shipping, and rewriting production code — these are the tools I reach for when reliability isn't optional.
Typed React apps, design systems, and interfaces that stay performant under real-world data loads.
REST and GraphQL services, event-driven pipelines, queue workers, and payment integrations at scale.
LLM-powered features, LangChain workflows, RAG pipelines, plus the containers and CI/CD that keep them shipping.
A curated slice of platforms serving real users in production — fintech, Web3, SaaS, and education. Every one of these shipped, and most are still running today.
The teams I've shipped with, the codebases I've owned, and the products I've taken from messy first commit to production load.
Babelos·Remote
Sep 2025 — Present
Building a production SaaS on Next.js + NestJS with Dockerised microservices. Designing PostgreSQL schemas, Redis caching, REST/GraphQL surfaces, and integrating LLM-powered features into the product.
Kedusoft·Remote
Sep 2024 — Jul 2025
Built SaaS and fintech platforms with Stripe and Paystack payment integrations. Optimised PostgreSQL queries, added Redis caching, and deployed via Docker + GitHub Actions CI/CD.
World Brain Technology·Enugu, NG
Feb 2024 — Aug 2024
Built a SaaS platform for SMEs using React, Node.js, GraphQL, and PostgreSQL. Designed dashboards for data visualisation and deployed to AWS + GCP.
CV2 Career Internship·Remote
Aug 2023 — Jan 2024
Contributed to a SaaS platform built with Python and Firebase. Shipped features, fixed bugs, and participated in code reviews — hands-on exposure to agile workflows and CI/CD.
Aptech Computer Education·Enugu, NG
Sep 2022 — Dec 2023
Taught full-stack web development — JavaScript, React, Node.js, and databases. Mentored students through hands-on projects and designed structured curriculum materials.
BeeTec·Remote
Apr 2022 — Aug 2022
Delivered client projects end-to-end — built and deployed responsive web applications, integrated third-party APIs, and optimised performance against tight deadlines while collaborating with remote teams.
Founders, leads, and teams who have trusted me with production systems — in their own words.
Currently open to full-time roles and select freelance engagements. Tell me what you're building, where it's stuck, and I'll reply within 24 hours with a next step.
