Senior Backend Engineer focused on building systems that work under real constraints: unreliable third-party services, inconsistent data, tight timelines, and production traffic.

I have 4+ years of experience building backend systems across fintech, payments, real-time platforms, and Web3-adjacent products. Most of my work sits in the uncomfortable middle where requirements change mid-flight, failures are normal, and performance and correctness matter more than clean abstractions.

My core background is Node.js (NestJS) and Laravel. I am currently expanding into Go and blockchain infrastructure, with an emphasis on throughput, correctness, and operational reliability.

• Building high-performance blockchain indexers and ingestion pipelines using Go.
• Upscaling my blockchain development skills, focusing on Solidity, gas optimization, and smart contract security auditing.

Indexing and blockchain infra work is mostly about edge cases: reorgs, partial failures, backfills, duplicate events, and making sure retries don’t corrupt state.

• Systems that degrade gracefully instead of failing loudly.
• Clear data ownership and auditability, especially in financial systems.
• Idempotent flows where retries are unavoidable.
• Pragmatic architecture decisions that fit team size, deadlines, and cost.

• Node.js, NestJS, Express
• PHP, Laravel, Laravel Lumen
• REST APIs, GraphQL

• PostgreSQL
• MySQL
• MongoDB
• Redis

• WebSockets
• Server-Sent Events (SSE)

• Docker
• AWS (S3, Lambda, API Gateway)
• Render, DigitalOcean

• Git, GitHub

Oct 2024 – Present

Fintech crypto payments platform operating across the US and Nigeria.

• Designed and implemented a KYC pipeline combining BVN, ID verification, and liveness checks.
• Automated most of user onboarding while still handling manual fallbacks for provider failures and inconsistent responses.
• Built real-time notification infrastructure using WebSockets and SSE.
• Worked on crypto-to-fiat payment flows where idempotency, reconciliation, and audit trails were mandatory.
• Collaborated closely with the CTO during a product pivot, revisiting assumptions that did not hold in production.

Tech: NestJS, PostgreSQL, Redis, AWS S3, WebSockets

The hard part was not writing APIs. It was handling unreliable third-party services, retry storms, and making sure users didn’t get stuck in broken states.

Dec 2022 – Oct 2024

Worked across multiple products with very different constraints, including education platforms, e-commerce, and on-demand services.

• Built and maintained REST and GraphQL APIs.
• Integrated payment providers (Paystack, Rapyd).
• Implemented geo-fencing attendance systems.
• Optimized database access patterns and introduced Redis caching where it actually helped.

Tech: Laravel, Laravel Lumen, Node.js, MySQL, MongoDB, AWS Lambda

Most complexity came from scaling systems that were not initially designed to scale, while keeping existing users unbroken.

• Poultry management platform with real-time operational tracking.
• Digital billing and wallet systems.
• Social platforms with real-time chat and notifications.
• Web3 token distribution systems.

These projects reinforced a consistent lesson: production systems are shaped more by failure modes than by happy paths.

B.Sc. Computer Science
National Open University of Nigeria (studies currently paused)

Email: [email protected]
GitHub: https://github.com/ogbechiarinze

I’m interested in backend problems where correctness, performance, and operational reality matter more than trends.