CommunicationOS

Careers

Build infrastructure with a small team

We write systems software, work out messaging protocols and build native interfaces for desks where losing a message means losing revenue.

4

Open roles

Antwerp

Base

2025

Founded

2 weeks

Interview to offer

How we work

Four things that are true here

Engineers run support

Everyone who builds the software answers tickets. You hear about bugs from the person who found one while trading.

Customer-driven delivery

We ship for named trading desks and telecom operators, not for a roadmap slide or an artificial sprint boundary.

Wide ownership

A small team means little bureaucracy. You own whole subsystems, from a channel adapter to the search index to the interface on top.

Antwerp and remote

We work out of the Antwerp office, with flexibility for engineers inside European hours.

Hiring

Four steps, two weeks

We judge candidates on what they can build and how clearly they think, not on where they studied. Everyone gets the same process.

01

Introductory call

Thirty minutes with Ben or Adam about your background and what you have built.

02

Paid work sample

A focused task on our actual stack, paid at a standard contract rate.

03

Technical review

We walk through your implementation together and talk architecture.

04

Decision

A definitive answer inside two weeks of the first call.

Nothing fits, but you want in?

Send what you have built and which subsystem you would want to own. Ben and Adam read every one.

No card required. Production deployment takes under an hour.

[email protected]