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C.J. Obumse
Discipline
Full Stack Software Engineer
Currently
Lead Software Engineer, Scooler AI
Fractional Head of Engineering, Peppermint
Status
Available for select work

ChukwuemelieJasonObumse

Index — 2026

I build reliable, revenue-generating products across B2B and B2C — in TypeScript, React and Node.js, from system design through DevOps to data.

Resume LinkedIn GitHub

About

B2B / B2C

I am a Full Stack Engineer with 3+ years of experience building reliable and revenue-generating products across B2B and B2C domains. I specialize in TypeScript, React and Node.js, with experience spanning system design, DevOps and data analytics.

I’ve helped companies like LaborHack, Peppermint and Wynk turn complex business problems into scalable products that drive growth and efficiency — from AI-powered systems for blue-collar workers, to external APIs for third-party integrators, and platforms that enable data-driven product development for companies like Kuda.

Stack

16 tools / 4 layers

Languages

  • TypeScript
  • JavaScript
  • Python

Frontend

  • React
  • Next.js

Backend & AI

  • Node.js
  • NestJS
  • Express.js
  • GraphQL
  • Vercel AI SDK

Data & Cloud

  • MongoDB
  • PostgreSQL
  • MySQL
  • AWS
  • Docker
  • Terraform

Impact

4 companies

50×Faster data-intensive operations at Peppermint, through query optimisation and caching.
10,000+Testers onboarded in the first month of Peppermint’s testers’ app.
₦45mRevenue from systems built at LaborHack.
55%Retention increase after rebuilding Wynk’s web app in React.
85+PRs landed in 6 weeks at Scooler AI, from build to production launch.
5–10×Fewer LLM round-trips from batched tool calls in Scooler’s browser agent.

May 2026 – PresentTypeScript, React, NestJS, Vercel AI SDK, MongoDB, AWS, Terraform, Docker, PostHog

Scooler AI

Agentic AI for College Applications

Lead Software Engineer · United States, remote

  • Led engineering for an agentic AI platform for college applications from build to production launch, landing 85+ PRs in 6 weeks.
  • Built a steerable browser agent that auto-fills Common App and university application forms, with batched tool calls cutting LLM inference round-trips 5–10×, plus an eval harness for reliability.
  • Built adaptive SAT prep — diagnostic, AI study plans, drills and full-length mocks over a 1,000+ question bank — and made Skye, the in-app assistant, agentic with live web search and secure tools over each student’s data.

Owned infra and analytics end to endscooler.ai Read the case study

Apr 2024 – PresentNext.js, NestJS, TypeScript, Vercel AI SDK, MongoDB, AWS

Peppermint

Product Feedback & Scaling Operations

Lead Software Engineer → Fractional Head of Engineering

  • Launched an AI-powered product feedback application used by companies like Kuda.
  • Built AI-powered pipelines with LLMs to generate usability study reports.
  • Architected in-app usability tests and surveys which generated over $1,000 within 3 months.

Read the case study

Jan 2024 – May 2026TypeScript, React, Node.js, GraphQL, MongoDB, AWS, Docker

LaborHack

Blue-Collar Empowerment Infrastructure

Software Engineer

  • Built systems for artisan recruitment, home maintenance and AI-driven portfolios, generating over ₦45m in revenue.
  • Provided data-driven insights that guided product improvements and optimised funnels.
  • Improved the flexibility and reliability of software deployments, ensuring 99.9% uptime.

Read the case study

Sep 2023 – Apr 2024JavaScript, Node.js, Express, React

Wynk

Building a Lifestyle Super App and Web Platform

Full Stack Developer

  • Contributed to a lifestyle super app, focusing on financial services.
  • Rebuilt the company web application in React, increasing retention by 55%.
  • Led technical and culture-fit assessment of new hires.

Read the case study

Projects

3 plates

Hunt Assistant dashboard showing tracked job applications and AI resume insights
Pl. A — AI / Careers

Hunt Assistant

An AI-powered job-hunting platform: analyses your resume against job requirements, writes tailored cover letters and tracks every application, with auth and persistent tracking.

TypeScript / Next.js / MongoDB / AI

GitHub Live

Zen fintech dashboard with multi-currency wallets and virtual cards
Pl. B — Fintech

Zen

Multi-currency wallets, currency exchange and virtual cards you can create, fund and track. Integrates Maplerad and Paystack.

TypeScript / Next.js / Node.js / MongoDB

GitHub Live

Prospera AI dashboard with intent-signal analytics and lead magnet insights
Pl. C — Analytics

Prospera AI

Dashboard for AI-personalised lead magnets and agentic follow-ups: intent-signal analytics, AI content generation and lead-magnet insights.

TypeScript / Next.js / Tailwind CSS / Recharts

GitHub Live

Writing

6 essays

  1. ProductMVPs and the Engineering Trap: Building What Actually MattersMany startups fail not because they can’t build, but because they build the wrong things — perfectly.Stackademic ↗
  2. CareerThe Irreplaceable Software Engineer in the AI EraStackademic ↗
  3. CareerThe Cross-Disciplinary Role of the Modern Software EngineerStackademic ↗
  4. LeadershipThe Priceless Influence of Senior Engineers on Junior EngineersStackademic ↗
  5. Node.jsImplementing an Escrow-like State in Node.jsStackademic ↗
  6. SecurityAuthentication and Authorization with JSON Web TokensMedium ↗