Trading Systems Reliability Engineer

Flow Traders

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 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 WHAT WE OFFER 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

Qube Research & Technologies

Qube Research & Technologies (QRT) is a global quantitative and systematic investment manager, operating in all liquid asset classes across the world. We are a technology- and data-driven group implementing a scientific approach to investing. Combining data, research, technology, and trading expertise has shaped our collaborative mindset, which enables us to solve the most complex challenges. QRT’s culture of innovation continuously drives our ambition to deliver high-quality returns for our investors.   You will join the Core Trading Platform team, which is responsible for the design and operation of QRT’s global electronic trading infrastructure. This team builds and maintains the ultra-low latency systems that underpin real-time trading, managing performance-critical workflows across global markets. You will work closely with developers, traders, and operations to optimise system behaviour, reduce latency, and ensure platform reliability at scale.   Your future role within QRT * Design and implement low-latency trading systems on Linux, focused on throughput, reliability, and determinism * Engineer scalable, high-performance distributed systems that support global real-time trading workflows * Analyse system behaviour using low-level tools such as packet captures, core dumps, and runtime profilers * Apply deep expertise in TCP, UDP, and multicast to understanding trade-offs in short-haul vs long-haul networks * Continuously profile, benchmark, and optimise code to reduce latency and increase throughput * Engage across the full software lifecycle: from architecture to debugging in live trading environments   Your present skillset * 5+ years of professional C++/C development experience on Linux, including modern C++ and multithreading * Strong expertise in TCP, UDP, multicast, and performance trade-offs in low-latency networks * Experience building and operating high-throughput distributed systems in production * Familiarity with scalable I/O models (e.g., epoll, io_uring), lock-free structures, and concurrent programming * Deep attention to detail with a rigorous approach to performance troubleshooting and optimisation * Proficiency in system-level tools (e.g., gdb, perf, tcpdump, valgrind, wireshark) * Comfortable working autonomously and taking ownership from problem to solution * Scripting experience (e.g., Python, Bash) and exposure to CI/CD or observability tooling is a plus * Prior exposure to electronic trading or exchange-facing systems is advantageous   QRT is an equal opportunity employer. We welcome diversity as essential to our success. QRT empowers employees to work openly and respectfully to achieve collective success. In addition to professional achievement, we are offering initiatives and programs to enable employees achieve a healthy work-life balance.

Qube Research & Technologies

Qube Research & Technologies (QRT) is a global quantitative and systematic investment manager, operating in all liquid asset classes across the world. We are a technology- and data-driven group implementing a scientific approach to investing. Combining data, research, technology, and trading expertise has shaped our collaborative mindset, which enables us to solve the most complex challenges. QRT’s culture of innovation continuously drives our ambition to deliver high-quality returns for our investors.    The Network Engineering function is responsible for the design, reliability, and optimisation of QRT’s wide-area network. The team supports large-scale routing infrastructure and collaborates closely with stakeholders across operations, systems engineering, and automation to ensure robust connectivity for global research and trading activities.    Your Future Role within QRT  You will:  * Design, build, and operate scalable, resilient infrastructure configuration and platform services  * Develop and maintain CI/CD pipelines to enable efficient and reliable software delivery  * Implement and evolve observability systems using OpenTelemetry (OTel), including distributed tracing, metrics, and logging  * Troubleshoot complex system issues, perform root cause analysis, and implement long-term fixes  * Automate infrastructure provisioning and configuration using scripting and infrastructure-as-code approaches  * Work closely with engineers to improve system design, deployment processes, and runtime performance  * Operate and optimise containerised environments and orchestration platforms (e.g. Kubernetes)  * Take ownership of services and features from implementation through production support and continuous improvement  * Collaborate with stakeholders to understand requirements and deliver effective technical solutions  Your Present Skillset  * Strong Linux systems expertise, including debugging and performance tuning  * Solid networking knowledge (TCP/IP, DNS, firewalls, VRFs, VLANs, BGP)  * Proficiency in Bash and Python for automation and tooling  * Experience with Python web frameworks (e.g. Flask, Django REST Framework)  * Experience building RESTful APIs  * Hands-on experience with containerisation (Docker) and container orchestration (Kubernetes)  * Experience with monitoring and logging stacks (Prometheus, Grafana, Loki)  * Understanding of asynchronous and multi-threaded systems  * Experience working with CI/CD systems in production environments  * Familiarity with distributed systems and common reliability patterns  * Ability to define and measure KPIs, SLAs, and SLOs  * Strong communication skills and ability to work with both technical and non-technical stakeholders  * Desirable:  * Familiarity with infrastructure-as-code tools (i.e. Terraform)   * Experience with cloud platforms (i.e. AWS)   * Knowledge of OpenTelemetry (OTel), including instrumentation, tracing, metrics, and observability pipelines     QRT is an equal opportunity employer. We welcome diversity as essential to our success. QRT empowers employees to work openly and respectfully to achieve collective success. In addition to professional achievement, we are offering initiatives and programs to enable employees achieve a healthy work-life balance.