C++ Software Engineer

Reactive Markets Limited; Singapore; Hybrid; SGD 120,000 - 190,000; Full time

Benefits offered by this job

Hybrid work model

Private health insurance

Pension

Dental/optical cashback

Cycle to work

Annual leave + holidays

Job summary

Reactive Markets Limited is seeking a C++ Software Engineer to build low-latency trading infrastructure on Linux. The role is hybrid and based in Singapore, with full-time employment.

You will work on the Switchboard trading platform, including pricing engines, connectivity gateways, and market-data systems. You will own features from design through production, handle incidents, and contribute to high-availability systems in a collaborative, senior team environment.

Qualifications

• Strong C++ with Linux systems programming (3+ years)
• Experience with performance-sensitive systems (profiling, optimisation)
• Familiarity with networking fundamentals (TCP/UDP, sockets)
• Go experience is a strong bonus; used for microservices and tooling
• Python for scripting, automation, testing, and data workflows
• Git and shell scripting
• Experience in financial services/trading tech is a plus but not essential

Responsibilities

• Develop low-latency trading infrastructure and core components on Linux
• Own full lifecycle from design to production support
• Implement, test, deploy, and monitor features in production environments
• Respond to incidents and participate in on-call during critical events
• Collaborate across the engineering team across time zones

Skills

C++ engineering

Linux systems

Performance optimization

Networking fundamentals

Python scripting

Git

Shell scripting

Production incident handling

Go programming

Tools

Go

Job description

C++ Software Engineer

Hybrid (Singapore-based) | Full-Time

About Us

Reactive Markets is the 2026 OTC Trading Platform of the Year (Risk.net). Our network handles over $75 billion in daily trading volumes across FX, Equities, and Cryptocurrency, connecting 60+ 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
• Python for scripting, automation, testing, and data analysis — used across the platform for tooling and operational workflows
• Git and shell scripting
• Experience in financial services or trading technology is a plus but not essential

How you work:

• You ship. You're delivery-focused — you iterate, you improve, you get things into production
• You own it. When you build something, you take responsibility for its behaviour in production. You respond to incidents (15-minute acknowledgement SLA during working hours), investigate issues, and close the loop
• You write things down. Documentation is not an afterthought — it's how we scale knowledge across a distributed team. If it's not written down, it doesn't exist
• You communicate. We're a distributed team across multiple time zones. Clear, proactive communication — especially when things go wrong — is essential
• You care about quality. You write clean, testable code. You review your peers' work thoughtfully. You push for continuous improvement without gold-plating
• You embrace AI tooling. We use AI tools (Claude, Gemini) to amplify our engineering capability — from code review and debugging to incident investigation and documentation. You don't need to be an expert, but you should be curious and willing to learn

What You Get

• Real problems —trading systems where performance is measured in microseconds, not user clicks
• An excellent team — senior engineers who care about craft, collaborate openly, and hold each other to high standards
• Ownership — small teams, clear accountability, direct impact on the platform and our clients
• Competitive package — up to 30 days leave + bank holidays, private health insurance, pension, life insurance, dental/optical cashback, cycle to work, socials and offsites
• Remote-friendly — work from home with flexibility. We trust our people to deliver
• Sustainable pace — we work hard, but we don't burn people out. Balance is how we stay sharp
• Growth — career progression to senior roles, performance specialisation, or technical leadership. We invest in people who invest in us

We believe in transparency, honest feedback, and writing things down. We celebrate delivery, not activity. We frame AI as empowering people — removing toil, amplifying capability, enabling higher-value work.

We aim to build systems that don't depend on the heroics of individuals to maintain and support — systems and processes that are resilient, documented, and sustainable.

Our Hiring Process

We keep our process focused and respectful of your time. Our process follows three stages.

Stage 1: Initial Conversation with Talent Acquisition
Format: Video call, ~30-45 minutes

Stage 2: Hiring Manager Conversation with the relevant team lead or hiring manager
Format: Video call, ~60 minutes

Stage 3: Technical Interview with two members of the relevant engineering team
Format: Video call, interactive session, ~60 minutes

Stage 4: In-person Interview with the Head of our Singapore office to see the environment and meet some of the team
Format: In-person ~45 minutes

What to expect in each stage will be explained by Talent Acquisition if you're invited to interview. Throughout the process, we aim to keep momentum with no unnecessary delays between stages, and feedback typically comes within a few business days.

*Please note that depending on availability, Stage 2 and 3 may swap around.