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Technical Java/Kotlin Lead
2 weeks ago
We are seeking an experienced Java Lead with a strong Java and distributed systems background to lead our cross-functional team based in Poland. This role combines deep technical expertise with people leadership responsibilities across backend and mobile engineering.
Our client, headquartered in California, is a global e-commerce leader connecting millions of buyers and sellers in over 190 markets. You will lead a team delivering cutting-edge AI/ML-powered experiences that transform the way people shop and sell online.
Your Role:
As an Java Lead, you will be responsible for the technical direction, people development, and delivery execution of a high-performing team. You will collaborate closely with product, AI/ML, and platform teams to design and deliver scalable features, ensuring operational excellence, clean architecture, and reliable services.
Key Responsibilities
- Lead and mentor a cross-functional team of backend (Java/Kotlin) and mobile engineers (iOS/Android)
- Drive architecture and design decisions for large-scale, distributed systems
- Provide technical leadership in areas such as API contracts (FGQL, REST, WebSockets), service integration, and performance optimization
- Promote best practices in observability, including metrics, tracing, and alerting
- Organize and lead on-call rotations, ensuring effective incident response and root-cause analysis
- Partner with product and ML stakeholders to define scope, set priorities, and ensure delivery of impactful solutions
- Conduct regular code and design reviews, contributing hands-on when needed to guide complex implementations
- Foster a culture of ownership, technical excellence, and continuous improvement
Qualifications:
- 2+ years of experience as Tech Lead with direct team leadership responsibilities
- 7+ years of backend development experience with Java or Kotlin
- Deep expertise in designing scalable distributed systems and microservices architectures
- Strong understanding of API contract design and maintenance: FGQL, REST, WebSockets
- Solid experience with Spring Framework and related Java/Kotlin tooling
- Hands-on experience leading teams through operational responsibilities, including on-call rotations
- Proficiency in modern observability practices: logs, metrics, tracing, incident response
- Excellent English communication skills (C1 level or above)
- BSc or MSc in Computer Science, Engineering, or a related technical field.
Preferred Qualifications:
- Experience with Apache Kafka or other real-time streaming systems
- Knowledge of reactive programming (e.g., Project Reactor)
- Experience with Docker and Kubernetes in a production environment
- Exposure to AI/ML-based applications or infrastructure
- Experience in e-commerce or consumer-facing platforms operating at scale
We offer*:
- Flexible working format - remote, office-based or flexible
- A competitive salary and good compensation package
- Personalized career growth
- Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
- Active tech communities with regular knowledge sharing
- Education reimbursement
- Memorable anniversary presents
- Corporate events and team buildings
Other location-specific benefits
not applicable for freelancers