Reactive Markets
More roles at Reactive MarketsC++ Software Engineer
Remote role where the employee must remain based in a particular country.
United Kingdom only
Employer listed it 4 weeks ago · Added yesterday
Been open since 4 weeks ago, still being checked, but it has been live a while.
Salary
Not stated
Location
United Kingdom only
Timezone
GMT
Contract
Full-time
Experience
Mid
Category
Software
This employer didn't state pay. Jobs like this usually pay around $155k–$250k a year, a typical range taken from 596 mid-level software roles on Nomaders that do state pay. It's a guide, not an offer.
Remote flexibility
Work from home
This is a remote role, but the employee must be based in United Kingdom. It is work from home rather than work from anywhere.
What the employer says
- Source listing states candidate location: "Remote, UK, Remote"
- Job description states: "UK-based"
What Nomaders makes of it
- Payroll and tax are likely handled in that country only
The quotes above are the employer's own words; the reading is ours. Always check the original listing and employment terms before working from another country.
About the role
C++ Software Engineer
Remote (UK-based) | Full-Time
About Us
Reactive Markets is the 2026 OTC Trading Platform of the Year ( Risk.net ). Our network handles over $50 billion in daily trading volumes across FX, Equities, and Cryptocurrency, connecting 40+ of the world's leading liquidity providers.
We build trading systems that operate at the edge of what's technically possible — where nanoseconds matter and a dropped message costs real money. Our engineering team is small, senior, and deeply invested in the craft of building cutting edge, reliable, high-performance systems.
The Role
We're looking for a C++ Software Engineer who wants to build low-latency trading infrastructure on Linux. You'll work on the core components of our Switchboard trading platform — pricing engines, connectivity gateways, market-data systems, and the messaging layer that ties them together.
This is not a role where you write code and throw it over a wall. You build it, you test it, you deploy it, you support it in production, and you improve it. Our engineers own the full lifecycle — from design through to operational excellence. When something breaks at 4pm on a Friday, you're part of the team that investigates and fixes it.
Occasional hours outside the normal working day are required for production releases, scheduled maintenance windows, and Level 3 support during critical incidents. We keep this to a minimum and recognise the commitment — but owning a production trading platform means being there when it matters.
What You'll Work On
Modern C++20 and Go on Linux — a modern software stack based on open source
Cloud-native infrastructure on AWS with colocation in key data centres
Microsecond-level latency optimisation and high-throughput messaging
Market-data and reference-data pipelines across multiple asset classes
FIX protocol integrations with global banks and liquidity providers
Observability and monitoring — dashboards, alerting, and metrics that make system behaviour visible
Production systems that handle real money — reliability is not optional
What We Need
Technical:
Strong C++ with Linux systems programming (3+ years)
Comfortable working close to the metal — you understand what's underneath your code
Experience with performance-sensitive systems (profiling, optimisation, deterministic behaviour)
Familiarity with networking fundamentals (TCP/UDP, socket programming)
Go experience is a strong bonus — we use Go extensively for microservices and command-line tooling, and you'll be expected to work with it internally. If you don't know it yet, strong C++ engineers pick it up quickly
Requirements
The employer hasn't listed requirements separately, they're described in the role summary above and on the original listing.
Benefits
No benefits package published with this listing. Ask about it at first interview.
How to apply
- 1Check the flexibility label above, work from home, matches where you plan to live and work.
- 2Tailor your CV to the role at Reactive Markets, mentioning your remote working experience and working hours (GMT).
- 3Apply directly on the employer's careers page using the button below. Nomaders never handles your application.
Found 2d ago. Last checked today. Always confirm the details on the original posting, salary and location can change after publication.
Listing sourced from Company boards.
Similar roles
Other open software roles with comparable remote rules.
Free to apply, no account needed.
Typically $155k to $250k per year · You'll be taken to the employer's careers page.