Senior Software Engineer

• Position: Senior Software Engineer/Data Engineer

• Location: Krakow- office 3 days a week

• Salary: 28 000 – 33 000 PLN

Our client is a B2B SaaS company building a modern platform that helps organizations manage compensation, workforce data, and related processes. Their products rely heavily on integrations with external systems such as HRIS, ATS, and payroll platforms to deliver accurate, real-time insights. The data platform team is responsible for ensuring that data flows reliably across these systems. By building a scalable and robust data layer, our client enables enterprise customers to make better, data-driven decisions. The company operates in a fast-growing space at the intersection of HR tech and data infrastructure.

Role overview

This role focuses on designing and scaling the data platform that powers the company’s core products. The engineer will build and maintain integrations with third-party systems (e.g., HRIS, ATS, payroll), develop reliable data pipelines, and improve observability across the platform. You will own integrations end-to-end, from design and implementation to monitoring and ongoing reliability. The position requires strong backend and data engineering skills, with an emphasis on distributed systems, API design, and handling external dependencies. You will also collaborate cross-functionally to prioritize integrations and ensure high data quality and system performance.

Requirements:

• 5+ years of experience building production-grade software

• Strong experience with backend systems, APIs, and integrations

• Familiarity with data pipelines, ETL/ELT processes, or data infrastructure

• Experience working with third-party APIs and distributed systems

• Understanding of reliability, observability, and system scalability

• Ability to work in ambiguous environments and drive projects independently

• Nice to have: experience with HRIS/ATS/payroll integrations and tools like Airflow, dbt, or Fivetran

• Tech stack familiarity (nice to have): TypeScript, Node.js, MySQL, Redis

Responsibilities:

• Design and build integrations with external enterprise systems (e.g., HRIS, ATS, payroll platforms)

• Develop and maintain scalable data pipelines

• Own integrations end-to-end, including deployment, monitoring, and issue resolution

• Improve system observability (monitoring, alerting, debugging tools)

• Identify and resolve reliability and scalability issues across the data platform

• Collaborate with product and business teams to prioritize the integration roadmap

Offer:

• B2B contract

• Hybrid working model- 3 days a week from the office

• Opportunity to work on a core data platform in a fast-growing SaaS environment

• High-impact role with ownership and influence over architecture decisions

• Collaborative, cross-functional team environment

• Potential additional benefits (depending on region): private healthcare, learning budget, and performance-based bonuses