Flow Traders is transforming its institutional trading platform across Equities, ETFs, Fixed Income, and Crypto. As part of OTCTECH, you will work directly with traders, quants, Operations, Risk, and Compliance to design and deliver a new OTC Trading Engine, automate operational workflows, and modernise existing applications into reliable, maintainable systems.
We are looking for a Senior Software Engineer who can take ownership of complex problems from discovery through production. You will need to understand how trading activities and data flow across systems, define clear technical boundaries, make sound architectural decisions, and build solutions that perform reliably in a demanding environment.
This role combines greenfield platform development with the opportunity to understand and evolve an established technology estate. It is grounded in strong engineering fundamentals, with quality, correctness, operational resilience, and clear technical judgment at its foundation.
What you will doUnderstand the Trading Domain- Work directly with traders, quants, Operations, Risk, and Compliance to understand requirements and how trading workflows operate in practice.
- Trace business processes and data flows across pre-trade research, execution, post-trade processing, risk, and compliance.
- Identify opportunities to improve resilience, consistency, automation, and operational efficiency.
- Build a shared understanding of system responsibilities, dependencies, and operational considerations.
- Design and Modernise the Platform
Help design and deliver a new OTC Trading Engine spanning Equities, ETFs, Fixed Income, and Crypto. - Define appropriate service boundaries, data models, interfaces, and event flows.
- Modernise existing applications where new business or engineering requirements create opportunities for improvement.
- Make and document architectural decisions, balancing performance, reliability, simplicity, and delivery speed.
- Design greenfield services and platforms that can be operated and evolved safely over time.
- Develop high-performance services, data pipelines, and integrations across Java, C++, and Python environments.
- Build event-driven systems using messaging and pub/sub patterns.
- Engineer for production from the outset, including testing, observability, failure handling, and operational support.
- Embed monitoring, root-cause analysis, and recovery mechanisms so issues are identified and resolved quickly.
- Take ownership of delivery from design and implementation through deployment and production operation.
- Strong experience building and operating distributed backend systems in production
- Expert in Java or C++, with working knowledge of Python
- Strong understanding of distributed systems, concurrency, and scalable system design
- Experience with event-driven architectures and messaging platforms such as Kafka
- Proven track record building high-performance, low-latency systems
- Ability to translate complex business requirements into robust technical solutions
- Ownership mindset with strong stakeholder management and communication skills
- Experience with modern engineering practices including testing, code reviews, observability, and automation
- Comfortable leveraging AI tools to improve productivity while maintaining quality and accountability.
- Experience in trading, capital markets, or financial services
- Exposure to Google Cloud Platform (GCP)
- Experience with Kubernetes, Docker, and cloud-native technologies
- Knowledge of BigQuery or large-scale data platforms
- Experience working in low-latency, high-throughput environments
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
Skills Required
- Strong experience building and operating distributed backend systems in production
- Expertise in Java or C++
- Working knowledge of Python
- Strong understanding of distributed systems, concurrency, and scalable system design
- Experience with event-driven architectures and messaging platforms such as Kafka
- Proven experience building high-performance, low-latency systems
- Ability to translate complex business requirements into robust technical solutions
- Strong stakeholder management and communication skills
- Experience with testing, code reviews, observability, and automation
- Comfort using AI tools while maintaining quality and accountability
- Experience in trading, capital markets, or financial services
- Exposure to Google Cloud Platform
- Experience with Kubernetes, Docker, and cloud-native technologies
- Knowledge of BigQuery or large-scale data platforms
- Experience working in low-latency, high-throughput environments
What We Do
Since 2004, Flow Traders has been a principal trading firm and one of the world’s largest liquidity providers, specialised in Exchange Traded Products (ETPs). Our headquarters in Amsterdam and offices in New York, Singapore, Hong Kong, Milan and Cluj accommodate more than 500 employees. Throughout the years, Flow Traders has received the industry’s recognition, winning numerous awards and has been listed as a company since 2015. Our non-hierarchical approach stimulates innovation and development. We value creative minds and out-of-the-box thinkers and challenge them to make full use of their capacities. Our demanding, high-paced environment continuously puts us to the test. Flow Traders fosters a strong team-oriented culture which rewards people for their contributions to the company as a whole rather than only in their direct area of responsibility. At Flow Traders, we focus on professional and personal development; we encourage our people to be the best at anything they do by offering the right training. On top of that, we have our private gym where our health coaches provide our people with the right personal sports programs. We invest in our hard working people, because they hold the key to our success.
