Résumé

Experience

1. 2025 — Present

   Remote · Freelance

   Mobile & Frontend Engineer

   Whistler

   Lead engineer on the Whistler mobile app, web client and admin dashboard; sole engineer on the web client.

   • Lead engineer on the React Native + Expo app on Google Play (TypeScript, Redux Toolkit, React Query): feeds, moments, realtime chat over Socket.IO, events and attendance, leaderboards and tiers, and community insight dashboards.
   • Built an on-device fastText interest classifier in pure JavaScript — 30 categories, offline, no native modules. Training reported 99% precision; re-evaluated without train/test overlap it scores 60–64% precision@1 (chance: 3.3%).
   • Push notifications (FCM + Notifee), deep linking, Google / Apple / Facebook sign-in, theming and dark mode; Sentry, Mixpanel and Firebase Analytics.
   • Built Whistler Admin: React 19, Vite, Tailwind CSS, TanStack Query and Table, React Hook Form + Zod and Recharts — user management, moderation, moments review, activity logs and a six-tab analytics suite; serverless API routes, a signed Vercel deploy webhook, CI, pre-commit hooks and MSW / Vitest tests.
   • Release management: Gradle Android builds and EAS over-the-air channels for staged development and production rollouts.
   • Sole engineer on Whistler Web (Next.js 16, React 19, TypeScript, TanStack Query, Socket.IO): 52 routes, Google sign-in, guest access, live username checks, load-on-scroll paging and 43 unit test files.
   • Added an in-browser post classifier to Whistler Web: all-MiniLM-L6-v2 sentence embeddings on ONNX Runtime Web, matched to community categories and cached on the device after the first download.
   • CI/CD for Whistler Web: format, lint, type and unit checks, Playwright e2e, Docker smoke tests and dependency audits, with an enforced dev → staging → prod flow to Cloudflare Workers and a VPS over SSH; a public landing page and link previews for shared posts and profiles.
   • Prototyped an AI community engine on elizaOS (TypeScript): four AI personas that reply to posts, start discussions and summarise threads, with rate limiting, per-user memory in PostgreSQL, Prometheus metrics, Docker and 28 test files.
   • Built the app download landing page: a single CSP-safe file deployed through GitHub Actions, served for share links opened without the app installed.

   Case studies: Whistler Mobile, Whistler Web, Whistler Admin

2. 2023 — Present

   Abuja, Nigeria · Hybrid

   Frontend / Full-Stack Engineer

   SeamHealth Group

   Frontend engineer on the Clientshot platform; lead engineer on Clientshot Public; first author of the Device Intelligence backend and the SeamHealth blog.

   • Responsive web applications in Angular, React, TypeScript and CSS, and reusable component libraries adopted across 3+ internal products.
   • Designed and consumed REST APIs, validating data consistency so malformed responses were caught before reaching production dashboards.
   • Clientshot: 416 commits across the customer app, admin console and v3 — form flows, complaint workflows, billing, notifications and operator tooling (Angular, TypeScript, RxJS).
   • Redesigned the Clientshot v3 complaint workflow to match Figma: the Update Status modal, an assignee picker with member roles, and tag changes held until the update is applied.
   • Lead engineer on Clientshot Public (React 19, TypeScript, TanStack Query, Zustand): organisation and industry directories, a 4-step review flow, sign-up and password reset, member and organiser modules — 47 of 118 commits and 95 of its 108 test files.
   • Device Intelligence: wrote the first FastAPI backend for device fingerprinting and risk scoring (SQLAlchemy, Alembic, Docker, an AWS ECS Fargate + RDS deployment path), and added live GPS location to its reporting in Clientshot Pulse.
   • SeamHealth blog: first version in Next.js 16 + Sanity, with newsletter deliverability checks, rate limiting, CSP, structured logging and CI.
   • ELSRT: real-time validation and error handling for lab data entry, and high-volume processing work — manual verification time down by an estimated 30%.
   • LLM evaluation and RLHF: prompt design, rubric-based review of model output, and flags for hallucinated or inconsistent responses.
   • Agile / Scrum: sprint planning, weekly code reviews and daily stand-ups; technical documentation and acceptance criteria for 15+ feature releases.

   Case studies: Clientshot, Clientshot Public, Device Intelligence, SeamHealth Blog, ELSRT, LLM Evaluation

3. 2022 — 2023

   Abuja, Nigeria · Hybrid

   Software Developer

   Nigeria Civil Defence Corps HQ

   Built and maintained internal web applications.

   • Developed and maintained internal web applications in Angular and React, improving reliability through root-cause analysis and regression testing.
   • Built reusable UI component libraries — new-feature development time down by an estimated 15%.
   • Reviewed peer code against internal engineering standards before deployment, with structured, actionable feedback.
   • Turned stakeholder requirements into technical specifications and acceptance criteria, reducing miscommunication between design and engineering.