Product Engineering, Owned End-to-End
Jamiu
Adewale Yusuf
I design and run production backend systems for teams who can't afford to get architecture, security, or deployment wrong — from the first schema to the live server under real traffic.
Four years shipping fintech, SaaS, and infrastructure systems. Laravel and React are the tools — engineering ownership is the discipline.
Proof in production
Primary stack
About
A product engineer who owns the whole stack
Most engineers own a layer. I own the product. Over four years shipping systems across fintech, enterprise SaaS, hospitality, and the public sector, the thing that has defined my work is not the framework — it is the discipline of taking full responsibility for what I build, from the first database migration to the live server under real traffic.
I happen to build in Laravel, PHP, React, and Next.js. But the decisions I make — schema design, caching strategy, auth architecture, deployment topology — are engineering decisions, not framework decisions. That distinction matters for the quality of what ships.
Based in Lagos, working async with distributed teams for four years — writing clearly, documenting decisions, and shipping without being chased.
System Architecture
SSO across 15+ apps, multi-tenant SaaS with full data isolation, KYC microservices, and nine-factor matching engines built to handle real production load.
Production Ownership
I provision the server, configure Nginx, set up the CI/CD pipeline, manage Supervisor and PM2, and deploy. Schema to browser — one person.
Security & Reliability
OWASP, OAuth 2.0, JWT, RBAC, HMAC signing, pessimistic locking for financial transactions, and audit logging aligned to compliance.
Architecture
System design
Architecture diagrams for four production systems. Each reflects real decisions made under real constraints.
Enterprise SSO Platform
Laravel · PostgreSQL · Redis · JWT · HMAC
Key design decisions
- —Single auth layer replacing 15+ separate login systems
- —HMAC-SHA256 inter-service request signing — no service can spoof another
- —JWT with custom claims (app_id, tenant, roles) — server validates without DB round-trip
- —Redis session cache — token validation in microseconds, not milliseconds
- —Full audit log — every authentication event timestamped and attributed
Projects
Production systems
A selection of shipped work. Several more projects are under NDA or active development.
Enterprise SSO Platform
Centralised authentication infrastructure spanning 15+ internal applications. JWT-based session flows, HMAC inter-service signing, RBAC routing, and granular permission management.
Fintech Wallet System
Production-ready payment infrastructure — wallet funding, peer transfers, virtual accounts, utility bills, airtime. Append-only transaction ledger in kobo with pessimistic locking preventing double-spend.
Multi-Tenant Hotel SaaS
Backend powering multiple hotel properties on shared infrastructure. Full tenant isolation via global scopes, reservation engine, inventory tracking, revenue dashboards, AI-generated booking confirmations.
KYC Microservice
Standalone identity verification service consumed across an entire product suite. Provider abstraction over Prembly, Smile Identity, and Dojah. NDPR-aligned audit logging, encrypted credential storage.
Job Recommendation Engine
Intelligent job matching with fault-tolerant multi-source API consumption from Adzuna, Jooble, and Workable. Redis-queued async recommendation generation with JWT + OAuth2 auth.
Travel Agency Booking Platform
Full backend infrastructure for an international travel agency — payment gateway integration, booking lifecycle management, and user dashboard APIs.
There's more — including work I can actually talk about
13+ systems built across fintech, identity verification, hospitality, logistics, and SaaS. Some NDA-protected, some in active development, some open for collaboration.
Skills
Technical expertise
Education
Academic background
B.Tech in Project Management
2016 – 2021Coursework: Systems Analysis, Software Engineering, Information Management, Database Systems
National Youth Service Corps (NYSC)
Feb. 2022 – Feb. 2023Ibadan, Oyo State · Completed mandatory national service programme.
Contact
Let's work together
Available for backend architecture, system ownership, and full-stack builds — remote-first and async, with four years of shipping production systems. Based in Lagos, Nigeria.