Top Tech Jobs & Startup Jobs in Krakow

Design, build, and maintain scalable Spring Boot backend services and APIs using Java/Kotlin and PostgreSQL. Optimize data models and SQL for performance, refactor services toward microservices, debug production issues, collaborate with cross-functional teams, mentor engineers, and use AI-assisted tools to accelerate development while maintaining code quality and reliability.

Own, design, build, and operate distributed, high-load backend services and data pipelines for ML infrastructure. Partner with ML and product teams to deliver self-service, reliable model serving, storage, and deployment components; ensure observability, scalability, and performance while driving technical decisions and continuous improvement.

The Director of Product Management will define the vision and strategy for the Portfolio Monitoring product, engage with clients, oversee agile squads, and coordinate with Sales and Marketing.

Lead product design for an AI-native SaaS platform: discover problems, run rapid experiments and prototypes, conduct lightweight user research, design trustworthy AI experiences, collaborate with PMs and engineers, and iterate on product systems and patterns while balancing speed and long-term vision.

Manage retention for four Shopify brands (each >$5M/year): own results and client relationships, write email copy, collaborate with design, share retention frameworks and tools, and grow account performance using full-funnel lifecycle strategies.

Lead the venture studio end-to-end: design operations, oversee incubator projects from ideation to launch, allocate capital across portfolio, align and mentor decentralized specialists, and synchronize cross-company execution and strategy in a Web3-native environment.

Senior backend engineer owning features end-to-end: build and maintain Ruby on Rails systems at scale, write unit/integration/E2E tests, improve performance and reliability, collaborate with product and engineers, and ensure long-term code quality and production stability while working during EMEA hours.

Lead development and improvement of the primary iOS app, implementing pixel-perfect UI, integrating Web3/crypto wallet features, collaborating with product and design, and ensuring quality via testing, analytics, accessibility, A/B testing, and performance optimization.

You will enhance project delivery for complex construction projects through strategic planning, provide actionable reports, and develop solutions with your team.

The Head of Performance will lead performance marketing strategies, focusing on optimizing paid acquisition channels and utilizing AI tools for data-driven decisions.