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Flow Traders

Senior Software Engineer, C++

London
Posted about 24 hours ago
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Senior C++ Software Engineers

Flow Traders is looking for Senior C++ Software Engineers to join our growing team in Amsterdam. Software Engineers at Flow Traders provide us with our competitive edge, equipping Researchers and Traders with the information and capabilities that they need to make sound business decisions. C++ plays a critical role in our event-driven trading systems, which are designed to reliably handle vast amounts of data at ultra-low latencies.

As a C++ Engineer, you will build systems used to analyze and trade tens of thousands of products across hundreds of global trading venues every day. Working closely with Technologists, Quantitative Researchers, and Traders, you’ll guide the development of our in-house trading technology and optimize it to achieve market-leading performance and reliability. Our proprietary trading platform includes everything from venue connectivity (feed handlers and ordering gateways) to trading engines to shared platforms that enable us to work quickly and efficiently - we are proud of our open and collaborative culture, so you’ll have plenty of opportunity to find what fits you best.

Teamwork is one of our most important firm values, and end users are never more than a short walk away, guaranteeing short feedback loops and immediate insight into the value that your code provides. To foster collaboration and innovation, we maintain shared libraries, encourage code re-use, and continuously evolve our views on application architecture.

What You Will Do

Main technical activities include:

For all C++ openings:

  • Lead the development and global rollout of our Core platform used in multiple business/focus groups (Market data, Quantitative research, Pricing, Strategies)
  • Be involved in the development process, which will be a fast-paced iterative process where you deploy your deliverables and validate them yourself and/or together with traders or quants
  • Develop tools/frameworks to deliver capabilities for tuning/develop data-driven systematic pricing and trading strategies
  • Work together with focus group engineers, Quants and Technical traders to refine requirements, collect feedback, and iterate on design and implementation of platform requirements

Reasons to use Rodeo

I’m in my final year doing Economics and I don’t know whether to apply for grad schemes now or do a masters first. What do you think?

Honest answer — it depends on where you want to end up. A lot of top grad schemes (Big 4, civil service, banking) don’t need a masters. Let’s look at the ones you’d be competitive for now, and we can decide if a masters actually adds anything.

Also worth knowing: most autumn 2026 applications are open now. Timing matters more than you think.

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Grad scheme, placement, apprenticeship? Not sure what you want yet — that's fine. Your agent talks it through with you and turns "I have no idea" into a shortlist.

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Graduate Consultant — 2026 Scheme

PwC·London, UK
£35,000/yr

Why you're a good match

Strong

Your economics background and your summer at a regional bank line up with what PwC looks for on the consulting scheme. Applications close in four weeks.

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It searches the market for you

Every day your agent scans the market matching roles against what actually matters to you, not just keywords on a CV.

Why you're a good match

You’ve got the grades and the economics background, and your bank internship is exactly the experience this scheme looks for. Apply soon — deadlines close within the month.

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Strong

Experience fit

Your summer at the bank plus your econometrics coursework map directly to the day-one responsibilities on this scheme — client modelling, market briefings, and deal support.

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Only hits

No noise. No "maybe this fits." Just roles with a clear explanation of why they're right — and where to focus when applying.

Exchange Connectivity

  • Write software that communicates with exchanges through their APIs, receiving market data and sending orders over the network in different protocols, such as FIX, Websocket or HTTP requests
  • Ensure quality of software based on a set of testing suites, which you are expected to use, maintain and extend
  • Optimize exchange communication through kernel bypass, optimizing TLS or the connection handling to an exchange
  • Research exchange behavior in detail to align our behavior to that of an exchange
  • Implement these solutions using the provided exchange SDKs in different languages such as C++, Rust, Python, Typescript

Trading Strategies

  • Implement trading algorithms based on requirements provided by traders and quants
  • Acquire and develop the necessary trading knowledge to successfully translate the requirements into actual software implementation
  • Continuously improve the stability, reliability, and performance of the trading engine
  • Enhance monitoring and observability in collaboration with the Trading Operations team
  • Investigate and resolve production issues such as crashes, unexpected business logic behavior, and performance bottlenecks
  • Prepare for releases and deployments of new trading engine versions

What you need to succeed

  • BSc, MSc, or PhD in Computer Science, Mathematics or equivalent
  • 5+ years post-graduation professional C++ software development experience (proprietary trading industry preferred)
  • Ability to write clean, reliable, and highly scalable code
  • Good knowledge of algorithms and data structures
  • Experience in parallel, asynchronous, and multithreaded programming
  • Interest in achieving maximum performance from available hardware and software
  • Ability to communicate with technical and non-technical business colleagues

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What we offer

Benefits

At Flow Traders, we create the conditions for hard-working, high-performing people to do their best work. From a thorough onboarding and ongoing access to Flow Academy, to latest technology and a collaborative, non-hierarchical culture, we give you the tools, ownership, and support to move fast and drive outcomes. We keep a close-knit, small-company feel while offering competitive salary, annual discretionary profit share, and comprehensive benefits, so talent can grow here, and stay here. See our benefits below:

  • Flow Academy and opportunities to attend domain-related conferences
  • Daily catered lunch, great coffee, and a fully stocked kitchen and snack bar
  • In-house Bar and Lounge with arcade, table tennis, billiards, and game consoles
  • Company boat
  • In-house gym and sessions with our nutritionist or personal trainer
  • Bi-weekly massages
  • Annual company trip and a variety of events throughout the year, such as the New Years Event
  • Global rotations across our offices worldwide
  • and more

Flow Traders does not accept unsolicited resumes from any professional staffing or search firms. All resumes, and any other information identifying potential candidates, submitted to any employee at Flow Traders via email, the Internet or directly without a valid and signed search agreement will be deemed free to contact by Flow Traders without any restrictions and no placement fee of any kind will be paid in the event the candidate is hired by Flow Traders.

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Skills

C++
Algorithms
Data Structures
Parallel Programming
Asynchronous Programming
Multithreaded Programming
Low Latency
Exchange Connectivity
FIX Protocol
Websocket
HTTP
Kernel Bypass
Rust
Python
Typescript
Software Architecture

Location

London, England, United Kingdom

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