Senior Kotlin Developer/Tech Lead (Kotlin+Python)

Salary: 1000-1400 pln/day on B2B

Work mode: elastic hybrid (1 day per week from Gdynia/Warszawa/Kraków/Rzeszów)

 

Why choose this offer?

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• Real impact on product direction as a technical partner in product discovery
• Strong ownership and autonomy in technical and delivery decisions
• Possibility to work on AI-powered and innovative solutions
• Contribute to the development of a leading e-commerce advertising platform

 

Project

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You will join the Language Intelligence team, responsible for building and scaling intelligent solutions supporting language-driven features within the product ecosystem. The team works in a cross-functional setup, closely collaborating with Product, UX, and Business stakeholders. The role combines strong engineering leadership with hands-on technical involvement, ensuring engineering excellence, high-quality delivery, and alignment between business goals and technical execution. This is a leadership position with real impact on architecture, delivery strategy, and product evolution.

 

Expected competences and knowledge

• Proven experience leading a software development team (people leadership + delivery ownership)
• Min. 7 years of experience with Kotlin and Python
• Ability to contribute to architecture decisions and conduct high-quality code reviews
• Experience in ensuring engineering excellence (clean code, testing strategy, CI/CD, production readiness)
• Strong ownership mindset and accountability for outcomes, quality, and reliability
• Ability to translate business goals into clear scopes, priorities, and execution plans
• Experience working in a cross-functional environment (Product, UX, Business)
• Very good communication skills and knowledge of English

 

Nice to have

• Background in e-commerce, marketplace, or consumer platforms
• Experience in mobile development
• Track record in AI-powered projects

 

Responsibilities you'll have

• Lead and develop the Language Intelligence engineering team
• Take end-to-end ownership of delivery, quality, and reliability
• Drive architectural decisions and technical direction
• Ensure engineering excellence standards (code quality, testing, CI/CD, production readiness)
• Collaborate closely with Product, UX, and Business stakeholders
• Translate business needs into technical solutions and execution plans
• Participate in product discovery as a technical partner
• Conduct code reviews and support the team in solving complex technical challenges

Technologies you'll work with

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• Kotlin
• Python
• AI
• CI/CD

 

Client – why choose this particular client from the Jit portfolio?

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Our Client dominates the Polish e-commerce arena as the market leader since 1999. With a user base of over 20 million and growing, this well-established platform is at the forefront of e-commerce, constantly striving for growth through market expansion and investment. As a major player in technology, our Client boasts a talented IT team of over 1,000 employees who focus on developing their own cutting-edge technologies. 

Jit Team has had a successful partnership with our Client since spring 2021, with multiple software development teams dedicated to our Client's platforms. These teams operate autonomously, designing platform components through micro-services. 

Working with our Client offers a chance to contribute to a solution used by millions on a daily basis and to tackle the challenge of delivering software at a massive scale, where even a single second of delay can have a significant impact. This project provides a unique opportunity to work with state-of-the-art technologies and tools, making it a rare and valuable experience. 

 

About Jit Team

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The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts. We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme.

Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity. By supporting indigenous initiatives, we ensure the circulation of good energy.