Collins Thomas

I build the parts of software people lean on without noticing: payment and lending backends, FX escrow, APIs that stay up. Lately I make tools for engineers, like RampLab, which turns a codebase into a book, and memhogs, which shows which apps are eating your memory.

Where I've worked

  1. Jul 2026 – Present

    Lissom

    Product Engineer, full-time, remote (United Kingdom)

    • Building Lissom, an AI-native business onboarding platform that gets business customers decision-ready first time.
  2. 2026 – Present

    Devise Digital s. r. o., Achievo

    Full-stack Engineer, freelance, remote

    • Build player engagement campaigns that turn quests into Steam wishlists, playtime, and referrals for game launches.
    • Shipped campaigns for Bus Simulator 27, 4Divinity at gamescom 2026, and Battle of Bots: Steam login, quest tracking, points, and tiered rewards, in English and German.
  3. Mar 2021 – Aug 2026

    Acumen

    Full-time, remote

    1. Senior Software EngineerNov 2025 – Aug 2026
    2. Software DeveloperMar 2021 – Nov 2025
    • API development and database design for client products.
    • On Kaorex, a USD/NGN FX marketplace, I owned escrow flows, bank and wallet management, admin dashboards, RBAC, and audit logging.
  4. Jul 2022 – Aug 2023

    Zeddpay

    Lead Backend Engineer, remote

    • Led backend engineering for a fintech platform that converts airtime into digital assets.
    • Owned API design, database schema, wallet and transaction flows, and server performance.
  5. Feb 2021 – 2025

    Be Resources Ltd, LendMe

    Software Engineer, remote

    • Built and maintained the backend for LendMe, a loan app with over 100k downloads on Google Play.
    • Loan processing, repayments, payments, and simple investment products, with a focus on security and scale.
  6. Nov 2020 – Feb 2021

    Alcott

    Backend Developer (Node), contract

    • Backend for a delivery platform covering local, interstate, and international shipments.
    • Shipment lifecycle, rate calculation, and customer flows from pickup to delivery.

Things I've made

RampLab landing page: your codebase, bound into a book worth reading
Bus Simulator 27 rewards campaign: the road is yours, join the fleet
4Divinity gamescom 2026 campaign: four titles, one goal
Battle of Bots campaign: endless waves, real rewards
memhogs website with its live terminal demo
memhogs for Android showing apps ranked by memory
StreamSwap: move your music between Spotify, YouTube Music, TIDAL and Apple Music
Illustration of a GoPath form with a shareable link
Illustration of a Kaorex trade moving through escrow
LendMe landing page with the mobile app
The classifier predicting Jollof Rice at 63.3% confidence
Illustration of the HR Slackbot answering a leave question with sources

Say hello

Got a project, a question, or just want to talk shop? Email me.

thomascollins582@gmail.com

I usually reach for TypeScript, Node.js, NestJS, Go, Python, Django, PyTorch, TensorFlow, PostgreSQL, MongoDB, Docker, Kubernetes, AWS and GCP.