Senior Software Engineer - OTC Trading

Flow Traders

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Amsterdam, Netherlands
Salary not disclosed
Employment type: Full-time · Published 2 days ago
Level: Senior

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Flow TradersPosted on the employer’s careers page · job-boards.greenhouse.ioRecognised sponsor (NL)

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Description (EN)

Location: Amsterdam

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 do

Understand 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.

Build Reliable Trading Systems

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.

What you need to succeed

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.

Nice to have

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

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

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