Lagos, Nigeria · Available for remote work

Hi, I'm Raphael 👋

Senior Software Engineer — I build the backend plumbing that moves money around the world 💸

5+ years designing and operating backend systems where correctness, idempotency, auditability and compliance are non-negotiable. Polyglot across C#, TypeScript, Go and Java — banking, payments and cross-border financial infrastructure are my happy place.

Email me +234 814 876 0639 LinkedIn
🧰

Technical Skills

🗣️ Languages

  • C#
  • TypeScript
  • JavaScript (Node.js)
  • Go
  • Java

⚙️ Backend

  • ASP.NET Core
  • Web API
  • Node.js
  • Spring Boot
  • Gin

🏗️ Architecture

  • Microservices
  • Event-driven systems
  • Domain-driven design
  • REST API design
  • Idempotent payment flows
  • Webhook processing

🗄️ Data

  • PostgreSQL
  • SQL Server
  • MongoDB
  • Firebase
  • EF Core
  • Schema migration
  • Indexing & constraints
  • Query tuning

☁️ Cloud & DevOps

  • Azure DevOps
  • AWS
  • GCP
  • Docker
  • CI/CD

🔐 Integrations & Identity

  • OpenID Connect
  • Azure Active Directory
  • Microsoft Graph API
  • Payment providers
  • Flagright AML
💼

Experience

🌍

Keyrails

Senior Software Engineer

Jan 2025 — PresentRemote
  • ✦Engineer core backend services for Stable OS, the platform behind Keyrails' cross-border capital movement and liquidity management.
  • ✦Design resilient services supporting multi-currency payments, settlements and digital asset operations across emerging markets.
  • ✦Build APIs for real-time interoperability between fiat and stablecoin systems, with compliance and auditability enforced at the service boundary.
  • ✦Own transactional data modeling over PostgreSQL, including scoped migrations against live tables and partial unique indexes.
  • ✦Integrate third-party AML screening into deposit and webhook processing paths, hardening deserialization and null handling.
  • ✦Drive reliability through fault-tolerant design, proactive monitoring and query-level performance tuning.
🏦

Zenith Bank PLC

Senior Software Engineer

Nov 2022 — Dec 2025Lagos, Nigeria
  • ✦Led the full development lifecycle for large-scale banking solutions, from architecture through deployment and maintenance.
  • ✦Architected and delivered critical payment systems including global payment gateways, materially improving transaction throughput and security.
  • ✦Built a multilingual PDF bank statement generator and a transactional email delivery service on a custom, testable client abstraction.
  • ✦Modeled and maintained SQL Server schemas supporting core account operations and reporting.
  • ✦Mentored junior engineers and embedded code review and code quality culture across the team.
🎯

Betway Group

Senior Software Consultant (Contract)

Apr 2024 — Apr 2025London, UK — Remote
  • ✦Translated complex business requirements into software design specifications for high-traffic consumer systems.
  • ✦Designed robust services, applications and modules meeting stringent customer and industry standards.
  • ✦Developed, tested and maintained production-grade backend services and supporting frontend interfaces.
  • ✦Collaborated across teams on quality, performance and on-time delivery under high-concurrency load.
💼

Microsoft Partner (Infinion Technologies)

Software Engineer

Jul 2022 — Nov 2022Lagos, Nigeria
  • ✦Built fintech solutions across investment, insurance and funding domains, including B2B integrations and intercompany data exchange.
  • ✦Implemented authentication and authorization with Azure Active Directory and OpenID Connect, enforcing secure enterprise access policies.
  • ✦Automated workflows with Microsoft Graph API, syncing documents and data between SharePoint and internal systems.
  • ✦Delivered Microsoft 365 Modern Work solutions across SharePoint, Teams and OneDrive, plus cross-platform mobile and progressive web apps.
💡

The Bulb Africa

Software Engineer

Jan 2022 — Jul 2022Lagos, Nigeria
  • ✦Developed and deployed scalable REST APIs and full-stack web applications with clean server/client integration.
  • ✦Managed database access through ORM tooling, optimizing performance and reliability.
  • ✦Implemented automated testing frameworks and conducted code reviews, mentoring junior developers.
🛠️

BIRS

Software Engineer

Jan 2021 — Nov 2021Benue, Nigeria
  • ✦Delivered software systems from specification through deployment against business and industry requirements.
  • ✦Debugged and improved existing systems, working across cross-functional teams on quality assurance.
🎓

Education & Certifications

🎓

2024 — Present

Miva Open University

Master of Information Technology (MIT), in progress

🌋

2015 — 2019

Nnamdi Azikiwe University, Awka

B.Sc. Applied Geophysics — Second Class Upper, top 5% of class

📋

2021

Joint Professionals Training & Support (JPTS)

Diploma in Project Management (PMP) — top 10% of class

⚛️

2021

HNG Internship (HNG i8)

Frontend Development with React.js — top 5% of cohort