Engineer Your Career at Techstack

We’re hiring in advance. The project is currently in Phase 2, and the role starts with Phase 3, expected in early January 2027 (exact date TBC). We’ll keep you updated throughout the hiring process. We’re looking for two Back-End Developers (Middle+ / Senior level) to join our team on a project for a Dutch bookkeeping platform. The product is modernizing its accounting core: replacing legacy single-entry accounting logic with a database-backed double-entry model, improving ledger-code management, and introducing reliable reconciliation capabilities. All changes are implemented within the existing Java/Spring application, with a strong focus on production stability, preserving historical accounting data, and safe migration to the new model. The current platform must keep running without disruption. This is a full-time engagement for approximately 19–23 weeks (Phases 3–4).

Start & timeline: We’re hiring in advance. The project is currently in Phase 2, and the role starts with Phase 3, expected in early January 2027 (exact date TBC). We’ll keep you updated throughout the hiring process. About the project: We’re looking for a Senior Full-Stack Developer (frontend focus) to join a project for a Dutch bookkeeping platform that is modernizing its accounting core: moving from legacy single-entry logic to a database-backed double-entry model, with better ledger-code management and reconciliation. The live platform stays fully operational, so all changes are delivered safely within the existing architecture, together with the client’s engineering team. This is a frontend-focused role: React and production MobX experience are the core, while Java/Spring knowledge helps you deliver features end to end. Full-time, approximately 19–23 weeks.

We’re hiring in advance. The project is currently in Phase 2, and the role starts with Phase 3, expected in early January 2027 (exact date TBC). We’ll keep you updated throughout the hiring process. We’re looking for two Back-End Developers (Middle+ / Senior level) to join our team on a project for a Dutch bookkeeping platform. The product is modernizing its accounting core: replacing legacy single-entry accounting logic with a database-backed double-entry model, improving ledger-code management, and introducing reliable reconciliation capabilities. All changes are implemented within the existing Java/Spring application, with a strong focus on production stability, preserving historical accounting data, and safe migration to the new model. The current platform must keep running without disruption. This is a full-time engagement for approximately 19–23 weeks (Phases 3–4).

Our client is a US-based healthcare technology company that develops medical-device technology and provides remote cardiac monitoring services. Its environment combines connected medical devices, cloud software, and clinical workflows, with a strong focus on service reliability, patient-data security, and regulatory compliance.

We are looking for aQA Automation Engineer (JS/TS) to join our team and contribute to a healthcare technology product.

We’re looking for a Senior AI Solutions Architect / Forward-Deployed AI Engineer to join the centralized Data & AI team of a global enterprise operating across multiple business units and legal entities. The company is building an internal AI Factory: a capability to design and deliver scalable AI solutions across its operating companies. The approach to AI is pragmatic. Instead of applying generative AI everywhere, the team decides where deterministic automation is the right tool and where probabilistic AI adds measurable value. Most solutions combine business logic, data engineering, workflow automation, document processing, and targeted LLM capabilities, on top of an established Google Cloud data infrastructure. This is a hybrid role: you talk to business stakeholders, design the solution, and build it yourself. It is not a purely advisory position. The first focus is finance, including a major global tax reporting and compliance initiative. This is a full-time, long-term engagement (12+ months), with an expected start in January 2027.

Senior Data Engineer responsible for building and maintaining scalable data pipelines and infrastructure on Google Cloud Platform.

We are looking for a curious and proactive Lead Generation Trainee to join our team at Techstack. In this role, you will explore the IT market, research companies and relevant data, prepare lead generation campaigns, and work with our internal tools, automation, and AI-powered solutions.

Join a long-term project where you’ll work with Node.js, TypeScript, and AWS, solve challenging production tasks, and help improve a large-scale software ecosystem.

We’re looking for a Senior Python Backend Engineer to help build a GRC platform powered by knowledge graphs. You’ll work with Python, PostgreSQL, and graph technologies to design data models, develop backend services, and build integrations that support risk analysis and compliance workflows. This is a 3-month contract for an engineer with strong backend expertise and hands-on experience with knowledge graphs and ontology design.