Reactive Markets
Senior C++ Software Engineer
Remote role where the employee must remain based in a particular country.
United Kingdom only
Employer listed it 4 weeks ago · Added today
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
Senior
Category
Software
This employer didn't state pay. Jobs like this usually pay around $165k–$225k a year, a typical range taken from 597 senior-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
Senior 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 Senior C++ Software Engineer who can shape the technical direction of our Switchboard trading platform while continuing to write excellent code. You'll work on the most performance-critical components — pricing engines, connectivity gateways, market-data systems, and the messaging layer that ties them together — and you'll have a direct influence on architectural decisions that affect the entire platform.
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.
Beyond your own delivery, you'll provide technical oversight across the team — reviewing designs, challenging assumptions, and mentoring engineers who are earlier in their careers. You'll help us maintain the quality bar that our clients depend on, and you'll contribute to the architectural decisions that determine how well our platform scales.
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
Architectural oversight — solution design, peer reviews, and technical direction for platform components
Mentorship — helping junior and mid-level engineers develop their skills, improve their code, and grow into stronger contributors
What We Need
Technical:
Strong C++ with Linux systems programming (5+ years)
Comfortable working close to the metal — you understand what's underneath your code
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 16h 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 $165k to $225k per year · You'll be taken to the employer's careers page.