SemBricks

SemBricks builds custom software that has to be fast, correct and well integrated. We are a Dutch engineering company, based in Winschoten since 2019, working for teams that have outgrown off-the-shelf tools or whose systems are hitting limits of speed, reliability or scale.

What we build:

- Web applications and SaaS platforms, from MVP to production

- APIs and integrations: ERP, accounting, payments, webshops, marketplaces and exchanges (Exact Online, AFAS, Stripe, Mollie, Bol.com, Interactive Brokers and more)

- Process automation that removes manual work and double entry

- High-performance backends in Rust and C#/.NET: low-latency APIs, data pipelines and rewrites of slow, critical parts

- Trading software: MetaTrader 4/5 Expert Advisors and indicators, broker and exchange connectivity, prop firm and risk tooling

- Blockchain and Web3: smart contracts and account abstraction (ERC-4337)

- Consultancy: architecture reviews, build vs. buy, technical due diligence and CTO as a service

How we work: measure first, build what matters and keep it simple to run. You own the code (agreed in the contract) and we sign an NDA on request. You get an honest answer, even when that is "buy, don't build".