Open to opportunities

joseph ene

@josephene

Software engineer at Citi improving card payment systems, including reconciliation and idempotency services for financial transactions.

United States

Message

What I'm looking for

I'm seeking a Senior Backend Engineer role focused on financial transactions, where correctness and audit trails matter as much as speed.

At Citi, I own Node.js and TypeScript microservices in the card payment systems team's authorization path. I reworked a wires-ledger reconciliation job, reducing the unmatched-item backlog from 2,317 to 611 over six weeks.

I added Redis-backed idempotency keys to the settlements API to stop duplicate debits during retry storms, and set up AWS Lambda and SQS workers for KYC/KYB document checks. I also mentor junior engineers and run the ledger service on-call rota.

At FDM Group, I supported a regional bank's remittances platform and moved settlements batch processing to AWS ECS tasks, reducing failed runs from about one in five to roughly one in 37. I also wrote TypeScript and Jest integration tests and helped extend a digital asset platform's wallet-balance service with Redis caching.

Experience

Work history, roles, and key accomplishments

Current

Software Engineer

Current

Citi

Jan 2025 - Present (1 year 9 months)

Owns Node.js and TypeScript microservices in the card payment systems authorization path, handling about 1.4M transaction processing events per day. Reworked nightly reconciliation job for wires ledger, cutting unmatched item backlog from 2,317 to 611 over six weeks.

NodeJS TypeScript ExpressJS PostgreSQL Redis AWS Lambda Amazon SQS Docker Jest CI CD GitHub Actions Git Code Review Mentorship

IT Consultant

FDM Group

Oct 2021 - Jan 2025 (3 years 3 months)

Supported a regional bank's remittances platform by maintaining Express services and PostgreSQL schemas for cross-border transfer status tracking. Wrote financial transactions integration tests in TypeScript and Jest that caught 43 regressions before release across nine sprints.