Staff Software Engineer

STX Group

Amsterdam, North Holland

Full Time

Posted December 1, 2025

Not Specified

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Job Description

This role involves designing and implementing scalable, resilient core systems in a full-stack environment, collaborating across teams to develop innovative solutions, and providing architectural leadership within a fintech or B2B SaaS company.

Key Responsibilities

Architect and design core systems ensuring they are scalable and maintainable
Assist with implementation and guide service teams through technical decisions
Create resilient, future-proof system designs by making strategic trade-offs
Translate ambiguous ideas into clear technical concepts across teams
Work across the full technology stack, including infrastructure as code and data engineering
Collaborate with business units such as Trading, Legal, Risk, and Operations to develop solutions
Mentor team members, establish architectural standards, and incorporate emerging technologies

Requirements

10 years in software development within product-led companies, ideally in fintech or B2B SaaS at scale
Strong in TypeScript for modern frontend development, with solid backend experience in Python and Node.js
Deep hands-on experience with AWS, serverless architectures, and Infrastructure-as-Code using CDK and Terraform
Experience with event-driven systems such as Kinesis and Kafka
Experience with container orchestration using Kubernetes
Proven track record in architectural leadership, defining standards, and mentoring teams
Strong systems thinking, excellent communication skills, and ability to operate effectively in ambiguity

Benefits & Perks

Compensation/salary range not specified

Work schedule not specified

Work environment perks not specified

Opportunity to work in a collaborative, innovative, and purpose-driven environment

Mentorship and standards-setting in architectural leadership

Exposure to emerging technologies including LLMs

Hybrid work model (LI-Hybrid)

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