Java Engineering Lead

Java Engineering Lead (f/m/x)Miejsce pracy: BiałystokTechnologies we useExpected

• Java

Optional

• Kotlin
• Scala
• Groovy
• Cloud Computing

About the project

At Sii, we partner with a globally recognized e-commerce and marketplace leader, best known worldwide for enabling millions of buyers and sellers to connect through fast, reliable online shopping experiences. Together, we are building mission-critical logistics and delivery platforms that operate at massive scale and real-time speed.

We are looking for an experienced Java-focused technical leader who combines strong engineering expertise with people leadership and a product mindset. If you enjoy shaping architecture, mentoring teams, and delivering solutions that impact millions of users every day, apply and build the future of digital commerce logistics with us

Your responsibilities

• Lead and mentor a backend engineering team, setting clear technical direction and supporting continuous growth
• Design, develop, and evolve high-performance Java/JVM services for delivery time prediction and delivery method selection
• Ensure scalability and reliability of systems handling very high throughput and low-latency requirements
• Collaborate closely with product, data, analytics, and operations stakeholders to align technology with business goals
• Drive engineering best practices such as code reviews, CI/CD, system observability, and data-driven decision making

Our requirements

• At least 5 years of senior-level experience in Java backend development, including designing and maintaining distributed systems at scale
• Minimum 2 years of experience in a technical leadership role, involving mentoring engineers and guiding architectural decisions
• Strong understanding of high-availability, high-throughput architectures and the JVM ecosystem (Java required; Kotlin/Scala/Groovy as a plus)
• Ability to collaborate closely with business and product stakeholders, effectively balancing technical quality with business priorities
• Very good command of English at B2/C1 level, enabling fluent communication in an international environment
• Fluent Polish required
• Residing in Poland required

What we offer

• Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas
• Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market
• We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022
• Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more
• Comfortable workplace – class A offices or remote work
• Dozens of fascinating projects for prestigious brands from all over the world – you can change them thanks to Job Changer application
• PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers
• Investment in your growth – meetups, webinars, training platform and technology blog – you choose
• Fantastic atmosphere created by all Sii Power People

Recruitment stages

• Send your CV
• Talk to us about your expectations
• Learn more about our projects and choose the best
• Start your adventure with Sii

Sii Sp. z o.o.

Sii is the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We already employ more than 7 300 professionals and implement projects in a variety of industries for clients from many countries around the world. The Great Place to Work title, won 10 times in a row, proves that at Sii, we create a friendly work environment.

Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment.

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