Vacancy in Poland: Backend Team Leader Salary

We are building a new team to develop a fast-growing cost aggregation solution that helps user acquisition and monetization managers optimize the performance of mobile marketing campaigns. Our product enables customers to truly understand the value for money of their marketing efforts by collecting, normalizing, indexing, and serving cost and revenue data from over 100 platforms, including Facebook, Google, and IronSource – all at scale.

As a Team Lead, you'll lead a group of ~4 Backend Engineers and help shape both the team and product from an early stage.

What You’ll Do:

• Lead and grow a team of ~4 backend developers (1 senior, 3 mid-level engineers)

• Take part in hands-on development of our data collection platform

• Solve complex and large-scale engineering challenges

• Collaborate with Product Managers and Engineers to deliver real value to customers

• Optimize engineering processes and development tools

• Improve system performance, scalability, and reliability

• Participate in on-call rotations and ensure system health and observability

• Stay ahead of trends and emerging technologies to keep our solutions state-of-the-art

Requirements:

• 5+ years of backend engineering experience

• 3+ years of team leadership experience (3+ developers)

• Strong expertise with:

  • Kafka

  • Amazon SQS

  • Kubernetes (K8s)

  • PostgreSQL

  • Event-driven architectures

• Experience with large-scale SaaS systems and data-heavy environments

• Proficiency in at least one language (Java / Go / Clojure / etc.)

• Familiarity with SQL engines and data warehouses (Athena, BigQuery, etc.)

• Strong sense of ownership and team collaboration

• Quick learning ability for new tools, frameworks, and systems

Nice to Have:

• Solid knowledge of Clojure

• Functional programming experience

• B.Sc. in Computer Science or equivalent