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Anthony Sharp

@anthonysharp

Software developer in fintech at Payment Assist Limited, where I built loan API and payment integrations now used for all loans.

Japan

Message

At Payment Assist Limited, I wrote most of the company API, including its loan calculation and repayment logic. I also led development of direct debit, bank, card, Google Pay and Apple Pay integrations now used for all its loans.

I designed fault-tolerant payment workflows with idempotency guarantees, audit logging and disaster recovery, and created public C# and Go SDKs for the B2B loans API from scratch.

At STR Group Limited, I was the sole engineer responsible for the accounting platform. After rewriting faulty core logic and optimizing the database, pages that had taken about two minutes loaded in under one second.

My current personal projects explore low-latency finance systems: NanoFill is a C++ order book and trading engine, NetBook processes market data packets with DPDK, and Theta Surface fits live Bitcoin options volatility data. I’m living in Japan and have JLPT N1.

Experience

Work history, roles, and key accomplishments

Software Developer

Payment Assist Limited

Jan 2024 - Jan 2026 (2 years)

Designed essential backend and infrastructure fintech software for a loan company extending credit in the hundreds of millions of pounds per year. Wrote the majority of the new company API, including loan calculation and repayment logic, and led full-stack development of payment integrations.

Go C#Docker Temporal GitHub Actions AWS Nginx Laravel Linux MySQL Git

Full-Stack Developer

STR Group Limited

Jan 2022 - Sep 2023 (1 year 8 months)

Sole engineer responsible for the accounting platform of a recruitment agency with £50M turnover. Planned and rebuilt the system for real-time company reports and employee commission payouts, creating a high-performance RPC API in Go that reduced page load times from ~2 minutes to under 1 second.

Go PostgreSQL Linux Nginx Docker Laravel Azure PowerShell Jenkins

Software Developer

i-Wonder Aggregator Services

Feb 2021 - Dec 2021 (10 months)

Developed custom API integrations for insurance companies to sell products online and helped build the company's own insurance comparison websites. Owned the largest share of live client integrations on the team and served as the main development contact for numerous business clients.

C#.NET Microsoft SQL Server MongoDB Angular TypeScript Azure Git