Onyxcapitalgroup developer jobs, salaries & tech stack

How Onyxcapitalgroup hires

Read from its live adverts and compared with today's UK IT market.

Onyxcapitalgroup is advertising 1 live technology role on its own careers page, mostly in software engineering, and has been hiring technology staff since at least August 2026.

Every role is based in London.

100% of Onyxcapitalgroup's roles are advertised as fully remote, against 28% across the UK IT market — noticeably more remote-friendly than most employers.

Onyxcapitalgroup does not publish salaries in its adverts.

The technologies that appear most often in its adverts are C++, Rust, Azure, Kubernetes, Docker and Kafka.

C++ features in 100% of Onyxcapitalgroup's roles, against 5% of UK IT roles overall — a C++ shop more than most.

In Onyxcapitalgroup's own words

From its advert for Rust Software Engineer.

Through Onyx Commodities, the Flux Terminal, and our trading division Axis, we dominate the benchmarks that matter — Dated Brent, S2F contracts, and beyond. We are not a bank. We are not a hedge fund. We are a technology-driven market-making powerhouse at the intersection of global energy markets, data, and engineering — and we are growing fast.Engineering at OnyxWe don’t hire passengers — we hire pilots. Every engineer here takes ownership, pushes back when the design isn’t right, and holds the bar high without being asked. We practise TDD, design for observability from day one, and treat software craftsmanship as a genuine competitive advantage. The team is small, senior, and embedded directly in the trading floor. There are no layers of abstraction between you and the business — your work has immediate, measurable impact from day one.The OpportunityWe are building our Sri Lanka engine...

Live roles at Onyxcapitalgroup

Detected on the employer's own careers page; each links to the full listing.

What they hire for

Technologies

Where

Seniority