Lot CJO-2309 · Roasting since Sep 2023

Full Stack Software Engineer

ChukwuemelieJason Obumse

I turn complex business problems into reliable, revenue-generating products — with TypeScript, React and Node.js, from system design to DevOps.

Read the Peppermint case study Resume

Fig. 1 — Career roast profile

Scope of ownershipMilestone

Charge · Sep 2023
Wynk — Full Stack Developer
Dry end · Jan 2024
LaborHack — Software Engineer
First crack · Apr 2024
Peppermint — Lead Software Engineer
Development · Jan 2026
Fractional Head of Engineering
Second crack · May 2026
Scooler AI — Lead Software Engineer

Curve plots scope of ownership over timeRoast in progress

About · The producer

Reliable products that earn their keep.

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 top companies like Kuda.

Resume LinkedIn GitHub

Yield · Measured in production

What came out of the roaster.

10,000⁺testers onboarded in the first monthPeppermint
50^xfaster data-intensive operationsPeppermint
₦45m⁺revenue from systems builtLaborHack
99.9^%uptime across deploymentsLaborHack
55^%retention increase after a React rebuildWynk

Stack · Tasting notes

On the bar, and where it was poured.

LanguagesPoured at

TypeScriptScooler AI · Peppermint · LaborHack
JavaScriptWynk
PythonIn the kit

ServerPoured at

Node.jsLaborHack · Wynk
NestJSScooler AI · Peppermint
Vercel AI SDKScooler AI · Peppermint
Express.jsWynk
GraphQLLaborHack

InterfacePoured at

ReactScooler AI · LaborHack · Wynk
Next.jsPeppermint

DataPoured at

MongoDBScooler AI · Peppermint · LaborHack
PostgreSQLIn the kit
MySQLIn the kit

InfrastructurePoured at

AWSScooler AI · Peppermint · LaborHack
DockerScooler AI · LaborHack
TerraformScooler AI

PracticeSince

System design2023
DevOps2023
Data analytics2023

House specialty — TypeScript, React, Node.js

Impact stories · Four lots

Roasted in production, labelled honestly.

Each role, read like a bag label: where it came from, how it was processed, how long it roasted, and what it yielded. Lot numbers are the year and month each started.

Lot 2605 · Ongoing

Scooler AIAgentic AI for College Applications

Process: Lead Software Engineer · Remote, US
Roast date: May 2026 – Present4 months and counting
Notes: TypeScript · React · NestJS · Vercel AI SDK · AWS · Terraform · MongoDB · Docker · PostHog
Yield: 85+ PRs in 6 weeks

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 5–10x, plus an eval harness for reliability
Built adaptive SAT prep (diagnostic, AI study plans, drills, 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 & analytics end to end

Read the story scooler.ai

Lot 2404 · Ongoing

PeppermintProduct Feedback & Scaling Operations

Process: Lead Software Engineer → Fractional Head of Engineering
Roast date: Apr 2024 – Present29 months and counting
Notes: Next.js · NestJS · TypeScript · Vercel AI SDK · MongoDB · AWS
Yield: $1,000+ in 3 months

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

Lot 2401

LaborHackBlue-Collar Empowerment Infrastructure

Process: Software Engineer
Roast date: Jan 2024 – May 202628 months
Notes: TypeScript · React · Node.js · GraphQL · MongoDB · AWS · Docker
Yield: ₦45m+ revenue

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 optimized funnels
Improved the flexibility and reliability of software deployments ensuring 99.9% uptime

Read the story

Lot 2309

WynkBuilding a Lifestyle Super App and Web Platform

Process: Full Stack Developer
Roast date: Sep 2023 – Apr 20247 months
Notes: JavaScript · Node.js · Express · React
Yield: +55% retention

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 story

Projects · Single origin

Single origin, built end to end.

Single origin · AI

Hunt Assistant

An AI-powered job hunting platform that analyzes your resume against job requirements, generates tailored cover letters, and tracks your applications — with auth, persistent tracking and AI insights.

TypeScript · Next.js · MongoDB · AI

Live site GitHub

Zen fintech dashboard with multi-currency wallets and virtual cards — Fig. 3 — ZenWallets

Single origin · Fintech

Zen

A fintech app with multi-currency wallets, currency exchange, and virtual cards you can create, fund and track. Integrates Maplerad and Paystack.

TypeScript · Next.js · Node.js · MongoDB

Live site GitHub

Single origin · Dashboard

Prospera AI Dashboard

A dashboard mockup for Prospera AI — AI-personalised lead magnets and agentic follow-ups — covering intent-signal analytics, AI content generation and lead magnet insights.

TypeScript · Next.js · Tailwind CSS · Recharts

Live site GitHub

Writing · Brew journal

Notes on the craft.

Essays on product engineering, careers and implementation, published on Stackademic.

Stackademic · Product

MVPs and the Engineering Trap: Building What Actually Matters

“Many startups fail not because they can't build, but because they build the wrong things — perfectly.”

Contact · Orders open

Let's build something worth pouring.

chukwuemelie.ezenwa@gmail.com

Resume Drive ↗LinkedIn chukwuemelie-obumse ↗GitHub jason-ezenwa ↗