Understand
I begin by understanding the problem, users, business goals, technical requirements, and constraints.
Available for selected projects
OluwadamilolaAjayiFull-Stack Software Developer
Building thoughtful digital products from interface to infrastructure.
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01—0702
Inside the system
One developer. Every layer.
My approach starts with understanding the problem before choosing the technology. I study the users, goals, requirements, and constraints, then transform complex ideas into clear, manageable systems. I work iteratively—planning, building, testing, gathering feedback, and improving until the product delivers meaningful value.
4+Years building
End → endCurrent focus
Product engineering, CRM integrations, workflow automation, and cross-platform experiences
United Kingdom · Available remotely
Structure
I turn complex ideas into clear user flows, features, priorities, architecture, and manageable development stages.
Build
I develop the most valuable functionality first using clean, reusable, and maintainable code.
Validate
I test functionality, usability, accessibility, performance, and assumptions throughout development.
Improve
I use feedback, testing results, and real-world usage to refine the product and guide what comes next.
03
Technology orbit
Tools chosen for the problem.
No inflated percentages—just technologies used to ship, learn, and build well.
Frontend
TypeScriptCore
ReactProduction
Next.jsProduction
Backend
Node.jsProduction
REST APIsProduction
SupabaseProduction
Mobile
React NativeProduction
ExpoProduction
Data
PostgreSQLProduction
PythonApplied
Data modellingCore
CRM + automation
HubSpot CRMApplied
API integrationsProduction
Workflow automationApplied
Cloud + tooling
GitCore
GitHub ActionsProduction
VercelProduction
04
Selected work
Products with purpose.
01Live · Data product
Scorecast
A football match prediction platform that prices every fixture across Europe's top leagues with a statistical model and publishes its own track record.
- Contribution
- Statistical modelling, data pipeline, automated testing, CI/CD, and front-end design
- Impact
- A Dixon-Coles model fitted on real results produces predicted scorelines, outcome probabilities and tips priced against bookmaker odds, validated on out-of-sample predictions. A daily GitHub Actions pipeline fetches fixtures, odds and results, rebuilds the site and deploys it automatically.
02Live · Client platform
Feyse Clothing Labels
A CRM-enabled order operations platform for a clothing-label business, coordinating customer enquiries, quotations, payments, production, and dispatch.
- Contribution
- Product design, full-stack engineering, HubSpot CRM integration, data modelling, workflow automation, and production deployment
- Impact
- Turns WhatsApp-led enquiries into structured records and syncs customers and enquiries to HubSpot as contacts and deals through a durable outbox with idempotent retries, so a HubSpot outage never blocks an order. Row-level security on every table, server-generated quote and invoice PDFs, and a full audit trail.
03Live · Consumer tool
RentCheck
A mobile-first property research platform that helps renters in England investigate a home and estimate its true monthly cost before committing.
- Contribution
- Product design, full-stack development, government API integration, payments, data validation, and error handling
- Impact
- Combines EPC ratings, police street-level crime data, Environment Agency flood warnings, food-hygiene ratings and Companies House records with a true-cost calculator. Each source fails independently so one outage never breaks a report, and paid plans run on Stripe checkout and webhooks.
04Live · Marketplace
FeyseFit
A made-to-measure fashion platform connecting clients with designers in the UK, Africa and the diaspora, from enquiry through delivery.
- Contribution
- Product design, full-stack engineering, authentication, database architecture, and client workflow development
- Impact
- Brings remote measurements, bookings, project tracking and a designer marketplace with admin approvals into one mobile-first workflow, backed by a versioned REST API.
05Live preview · E-commerce
Metheues Clothings
A T-shirt-first fashion label's storefront and admin, designed as one system in Figma and built to match it — now live as a preview.
- Contribution
- Design system, product design, database design, and full-stack engineering
- Impact
- A 64-screen Figma design system with 9 email templates. Business rules live in PostgreSQL rather than app code: stock can never go negative, idempotent Stripe webhooks decrement stock exactly once, and prices are only ever calculated on the server.
06In development · Messaging
Ohun
An accessible, private real-time messaging app for friends and family, on web and mobile from one TypeScript codebase.
- Contribution
- Architecture, monorepo setup, real-time backend, web and mobile clients, and automated testing
- Impact
- A monorepo sharing Zod contracts, design tokens and an API client across web and mobile, with lint, type-check, unit and Playwright end-to-end tests on every change.
07Live · Client website
RCCG GLT
A responsive website for RCCG God's Love Tabernacle, a UK church, presenting the ministry, service times, programmes and events for members and first-time visitors.
- Contribution
- Website design, frontend development, responsive implementation, and content architecture
- Impact
- Gave the church a clear digital presence where visitors can learn about the ministry, see service details and programmes, and find contact information.
08Earlier project · Demo may take ~30s to wake
YelpCamp
A full-stack campground discovery platform where users can browse, create, update, and review campground listings.
- Contribution
- Backend development, authentication, CRUD functionality, database integration, and responsive interface development
- Impact
- A complete listing platform with user authentication, protected routes, interactive maps, reviews, and full CRUD operations.
05
Development timeline
Built through iteration.
1
Aug 2024 — Present
Freelance Full-Stack Developer — Independent
Deliver full-stack web products end to end, from requirements and UI design through database schema, APIs, testing and deployment, alongside my primary employment.
Shipped four live products — Scorecast, Feyse Clothing Labels, RentCheck and FeyseFit — with Metheues Clothings and Ohun in development, integrating HubSpot CRM, Stripe, Resend and UK government open-data APIs.
Next.js · React · TypeScript · Python · Supabase · PostgreSQL · Stripe · HubSpot · GitHub Actions · Vercel2
Dec 2025 — Present
FLT Operative — Reach Truck — B&M Distribution Centre
Operate reach trucks to move, stack, and retrieve palletised goods from high-level racking while completing mandatory equipment and safety inspections.
Promoted from Warehouse Operative, consistently meet daily operational targets, and support colleagues with safe and efficient stock movements.
Reach Truck · WMS · Barcode Scanners · Inventory Control3
Aug 2024 — Nov 2025
Warehouse Operative — B&M Distribution Centre
Picked and packed products accurately for store deliveries using voice-pick technology in a fast-paced distribution environment.
Maintained required productivity and accuracy standards while supporting reliable, time-sensitive store fulfilment.
Voice Picking · Stock Handling · Order Fulfilment4
Jan 2022 — Jul 2024
Software Engineering Programme — 100Devs (part-time)
Completed an intensive full-stack programme alongside full-time work, building and deploying React, Node.js, Express and MongoDB applications.
Built projects with JWT authentication and Stripe payments, deployed on AWS Amplify with assets on Amazon S3, and worked in Agile teams on planning, code review and debugging.
React · Node.js · Express · MongoDB · JWT · Stripe · AWS5
Jan 2024 — Aug 2024
Recycling Operative — Sweeep Kuusakoski
Processed recyclable materials in a high-volume environment while following operational, quality, and workplace safety procedures.
Reduced contamination rates by 10% and exceeded production targets by 12%.
Quality Control · Safety Procedures · Production Operations6
Jan 2024 — Mar 2024
Agile Project Manager — TechSkilling by AMS
Led sprint planning, daily stand-ups, and retrospectives while coordinating MVP delivery under tight deadlines.
Improved team coordination and workflow efficiency through structured Agile ceremonies and clearly defined sprint priorities.
Agile · Scrum · Sprint Planning · MVP Delivery7
Jan 2018 — Sep 2023
Deputy Manager — VFS Global
Managed visa application operations, supported staff development, and improved customer-service processes.
Led training initiatives that increased value-added-service target achievement by 35%.
Team Leadership · Process Improvement · Training · Customer Service06
From idea to deployment
A clear route to useful.
- Discover
- Plan
- Design
- Build
- Test
- Deploy
- Improve
07
Start a project
Let’s make something useful.
Have a product to build, a problem to solve, or an ambitious idea? Let’s create something useful.
oluwadamilola.william@gmail.com GitHub LinkedIn