Senior Software Engineer

Senior Software Engineer at STX Group

STX Group, located in Amsterdam, North Holland, Netherlands.

It’s no wonder we can go further, faster together. We’re a team of 450+ professionals from 50+ nationalities, all commercially driven, entrepreneurial and ready to turn potential into progress. Not just for us, but for the world too. At STX, we’re focused on so much more than making money. We’re here to make a profit with a purpose. Because for us, nothing’s more important than being able to trade in environmental commodities and create the most effective decarbonization strategies for our clients. Join us and together we can change the world – one trade at a time. Your success story starts here.

TEAM & ROLE

STX is building the digital infrastructure that powers global decarbonization. As a Senior Software Engineer, you'll design and build the systems that run the complete trading lifecycle – from origination and risk management through trading, settlement, and reporting – forming the backbone of how STX operates at scale. This is not a maintenance role. It's an opportunity to work on mission-critical platforms that connect financial performance with environmental impact where technology, trading, and purpose converge. You'll join a growing team of engineers, product leaders, and domain experts, modernizing our architecture, simplifying complexity, and building the digital foundations that drive STX’s next phase of growth.

KEY RESPONSIBILITIES

• Design and develop scalable services supporting the full trading lifecycle, from front-office origination to back-office settlement and reconciliation.
• Create clean APIs, modular architectures, and data pipelines to ensure clarity, performance, and reliability across the digital platform.
• Translate complex business processes into maintainable, production-ready software that scales with organizational needs.
• Contribute to technical excellence by writing high-quality, well-tested code and participating in design/code reviews to raise team standards.
• Collaborate cross-functionally with Trading, Risk, Finance, Operations, and Data teams to deliver robust, well-architected solutions.
• Mentor and grow engineering talent, sharing best practices, modeling craftsmanship, and fostering a culture of clarity and accountability.

KEY REQUIREMENTS

• 6-8+ years of experience building scalable, reliable software, ideally in fintech, trading platforms, or data-intensive systems.
• Proficiency in TypeScript with strong backend experience in Python or Node.js, and hands‑on experience with AWS, serverless, and event-driven architectures.
• Practical experience with infrastructure‑as‑code tools (CDK/Terraform), Kubernetes, and cloud-native design patterns.
• Strong system design and engineering fundamentals, including clean architecture, testing, and production‑grade software development.
• Excellent collaboration and communication skills, able to bridge technical and business perspectives and give/receive constructive feedback.
• Curiosity and growth mindset, staying up-to-date with emerging technologies like LLM‑powered automation, serverless systems, and data‑centric design.

GET IN TOUCH

Are you ready to embark on a journey with us? Please submit your application for this job by clicking the “apply” button. For further questions, please contact the Recruitment department at .

Seniority level: Mid‑Senior level

Employment type: Full‑time

Job function: Engineering and Information Technology

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