Solomon Atansuyi

You can call me BIGSOLO

I'm a

About Solomon

I'm a full-stack developer with a frontend foundation, based in Lagos, Nigeria. I build responsive web applications for real business workflows and my own SaaS products, working across user interfaces, REST APIs, authentication, database-backed features, dashboards and payment flows.

My day-to-day stack is React, Next.js and TypeScript on the frontend, Node.js and Express on the backend, and PostgreSQL through Supabase or Neon for data. I've shipped Paystack checkouts and subscriptions with server-side payment verification, and integrated the Gemini API into a personal finance coach. Off the keyboard, you'll find me on the court or playing games.

Solomon Atansuyi

Skills

The tools and techniques I've used to ship real products, from a live e-commerce store to a payment orchestrator.

  • TypeScript
  • React
  • Next.js
  • Node.js
  • Express
  • PostgreSQL
  • Supabase
  • Prisma
  • Tailwind CSS
  • Redis
  • Docker
  • Paystack
  • Gemini API
  • Vercel

Languages

Typed end to end, from database to UI.

  • TypeScript
  • JavaScript (ES2023+)
  • SQL
  • PL/pgSQL
  • HTML5
  • CSS3

Frontend

Fast, responsive interfaces with modern React.

  • React 19
  • Next.js 16 (App Router)
  • Server Components
  • Server Actions
  • Vite
  • Tailwind CSS 4
  • shadcn/ui
  • Radix UI
  • Motion (Framer Motion)
  • Lenis smooth scroll
  • React Router
  • Zustand
  • TanStack Query
  • TanStack Table
  • React Hook Form
  • Recharts
  • Axios
  • Leaflet & React-Leaflet
  • i18next
  • Intl API
  • Lucide Icons
  • Sass
  • Bootstrap

Backend & APIs

Modular REST APIs with validation on every input.

  • Node.js
  • Express 5
  • REST API design
  • Next.js Route Handlers
  • Next.js Middleware
  • Server-side rendering
  • Zod validation
  • BullMQ job queues
  • Redis
  • Webhooks
  • Cron & scheduled jobs
  • pino structured logging
  • PDF generation (PDFKit, React-PDF)
  • CSV & Excel (PapaParse, ExcelJS)
  • Node crypto & Web Crypto

Databases

Relational design that protects the data.

  • PostgreSQL
  • Supabase (Auth, Storage)
  • Prisma ORM
  • node-postgres (raw SQL)
  • Row Level Security
  • Migrations & seed scripts
  • Triggers & stored functions
  • Row locking (FOR UPDATE)
  • Indexes & constraints
  • Neon
  • Redis

Auth & Security

Secure by default, and tested by attacking my own apps.

  • JWT + rotating refresh tokens
  • Role-based access control
  • Google OAuth 2.0 / OIDC
  • OTP email login
  • HMAC-signed sessions
  • argon2id, bcrypt & scrypt
  • Rate limiting
  • Helmet & CORS
  • CSP & HSTS
  • Webhook signature verification
  • Timing-safe comparison
  • Secure uploads (magic-byte checks)
  • Signed URLs
  • XSS & injection prevention
  • Security testing (115 attack tests)
  • GitGuardian secret scanning

Payments

Money handled safely, exactly once.

  • Paystack API
  • Subscriptions & Pro plans
  • Server-side verification
  • Idempotent payments
  • Bank-transfer checkout
  • Race-safe stock reservation
  • Double-entry ledger
  • Reconciliation
  • Gateway failover
  • Rent tracking & receipts

AI & Integrations

Third-party services wired into real workflows.

  • Google Gemini API
  • Prompt engineering
  • Resend (DKIM, SPF)
  • Leaflet & OpenStreetMap
  • AI pair programming (Claude Code, Codex, ChatGPT)
  • Exploring: AI automation

DevOps & Tooling

From local containers to serverless production.

  • Vercel (serverless, cron, headers)
  • Docker & Docker Compose
  • GitHub Actions CI
  • Git & GitHub
  • Conventional Commits
  • pnpm workspaces (monorepos)
  • npm
  • esbuild
  • Turbopack
  • tsx
  • Render
  • Supabase Cloud
  • Custom domains & DNS
  • Environment & secrets management
  • PowerShell

Testing & Quality

Proof that it works, under load too.

  • Vitest
  • Supertest
  • Integration tests on real Postgres & Redis
  • Load testing (autocannon)
  • ESLint 9
  • oxlint
  • TypeScript strict mode
  • API test scripts

Product & UX

Built for real Nigerian users, on real phones.

  • Responsive, mobile-first design
  • Accessibility (focus traps, reduced motion)
  • Progressive Web Apps
  • Offline support
  • Internationalisation (5 languages)
  • Scroll animations
  • Privacy compliance (GDPR, NDPA)
  • Freemium plans
  • Analytics dashboards
  • Role-based dashboards

Engineering concepts

The ideas behind the tools, the things I can explain in an interview.

  • Concurrency control
  • Idempotency keys
  • Double-entry ledgers
  • Circuit breakers & failover
  • Queues, retries & dead-letter queues
  • Webhook dedup & polling fallback
  • Payment state machines
  • Reconciliation
  • Adapter pattern
  • Dependency injection
  • Shared types across a monorepo
  • Architecture Decision Records

Projects

Hover over a project (or tap it on your phone) to see what it does and how it was built.

Resume

Full-stack developer building with React, Next.js, TypeScript, Node.js, Express, PostgreSQL and Supabase.

Education

B.Sc. Industrial Mathematics with Computer Science

2026

University of Lagos, Lagos, Nigeria

Certification

2021

Chrisgate College

Web Design and Development

Experience

Full-Stack Developer – Freelance & Personal Projects

Present
  • Built Sh'Oil Store, a live e-commerce platform for a real business, with Next.js, Supabase and Paystack.
  • Built MoneyFlow, a personal finance SaaS with an Express/PostgreSQL API, Gemini-powered coaching and Paystack subscriptions.
  • Built DirectLet and ServiceHub, booking and rental platforms for Nigerian landlords and barbershops.

AITERM – Web Designer/Developer

2021
  • Researched user requirements and planned out the design.
  • Implemented the UI and UX designs in code.
  • Designed and managed the company’s front-end and back-end website with HTML, CSS, JavaScript, PHP and MySQL.
  • Worked with the customer care department to resolve client issues.
Download CV

Contact Me

Location:

Lagos, Nigeria

Call:

+234 907 916 2612