Senior Backend Software Engineer

Quick Facts

• Role: Senior Software Engineer (Backend)

• Work model: Hybrid (Warsaw)

• Employment: Full-time (Umowa o Pracę)

• Compensation: 30,000–35,000 PLN gross/month (negotiable)

Description

Engineer backend foundations for data-intensive products and AI-powered tools. Build reliable data workflows, bring LLM-based features from experimentation into real-world applications, and develop APIs and independent services with demanding performance and reliability requirements. Strengthen deployment, monitoring, and operational stability while partnering with research, data, and product teams.

Responsibilities

• Engineer backend foundations behind data-intensive products and AI-powered tools

• Create reliable data workflows to prepare and move information between systems

• Bring LLM-based features from experimentation into real-world applications

• Develop APIs and independent services meeting demanding performance and reliability requirements

• Strengthen deployment processes, system monitoring, and operational stability

• Partner with research, data, and product teams to deliver usable solutions

• Share expertise and help other engineers improve their technical approach

Requirements

• 5+ years of commercial backend engineering experience

• Strong programming skills in Java, Python, or Go

• Practical experience with data engineering and batch or streaming processing

• Experience implementing generative AI or LLM-based functionality

• Familiarity with cloud infrastructure, Docker, and container orchestration

• Knowledge of CI/CD, automated testing, and Infrastructure as Code

• Solid SQL skills and experience with different types of databases

• Degree in Computer Science or a related technical discipline

• Strong English communication skills

Benefits

• Compensation: 30,000–35,000 PLN gross/month (negotiable)