SENIOR SOFTWARE ENGINEER - PAYMENTS & FINTECH
Mahin K. H.
I build software that stays correct at scale - and love taking on new problems and shipping projects end to end. Based in London, UK.
// PROFILE
Software engineer with 6+ years building payments and fintech systems in Go and Python. I work on merchant-facing payment capabilities - split payments, combo-card processing, reconciliation analytics - and care about clean data models, correctness, and owning things from design to production.
Outside the day job I build and run my own products end to end. I thrive in environments that value technical rigour and high ownership.
// EXPERIENCE
Senior Software Engineer I · Checkout.com / ProcessOut
Shipped new merchant payment capabilities (Split Payments, combo-card) and a ClickHouse-backed reconciliation analytics dashboard, owning each from design through production.
Software Engineer · GetGround
Re-architected subscription and account-management services in Go, replacing brittle legacy flows with a cleaner, more maintainable design.
Software Engineer · Beamery
Built integration tooling in Go and NodeJS connecting Beamery to external HR / ATS systems, with supporting infra on GCP (Terraform, Kubernetes).
Software Engineer · AppSamurai
Built high-throughput Go/MongoDB APIs serving millions of requests per day, plus Python (Falcon) services over ClickHouse, Redis and MySQL on AWS.
Software Engineer · tarla.io
Built and scaled a PostgreSQL-backed agricultural monitoring platform used by 3,000+ farmers, handling real-time data streams.
// PROJECTS
Contemporary Issues in Design
Bilingual (EN/AZ) peer-reviewed academic journal platform, shipped end to end as sole engineer.
SourceBritain
A UK B2B supplier directory with verified company data, built on a modern serverless stack.
Merton Fish Bar - Accounting
A private daily accounting dashboard tracking sales, expenses and profit per day, week, month and year.
Merton Fish Bar - Website
Public site for Morden's favourite traditional chippy - menu, opening hours and order links.