Technical Java/Kotlin Lead (AI agents)

Описание

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 systemsProvide technical leadership in areas such as API contracts (FGQL, REST, WebSockets), service integration, and performance optimizationPromote best practices in observability, including metrics, tracing, and alertingOrganize and lead on-call rotations, ensuring effective incident response and root-cause analysisPartner with product and ML stakeholders to define scope, set priorities, and ensure delivery of impactful solutionsConduct regular code and design reviews, contributing hands-on when needed to guide complex implementationsFoster a culture of ownership, technical excellence, and continuous improvement

Qualifications:

2+ years of experience as Tech Lead with direct team leadership responsibilities7+ years of backend development experience with Java or KotlinDeep expertise in designing scalable distributed systems and microservices architecturesStrong understanding of API contract design and maintenance: FGQL, REST, WebSocketsSolid experience with Spring Framework and related Java/Kotlin toolingHands-on experience leading teams through operational responsibilities, including on-call rotationsProficiency in modern observability practices: logs, metrics, tracing, incident responseExcellent 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 systemsKnowledge of reactive programming (e.g., Project Reactor)Experience with Docker and Kubernetes in a production environmentExposure to AI/ML-based applications or infrastructureExperience in e-commerce or consumer-facing platforms operating at scale

We offer*:

Flexible working format - remote, office-based or flexibleA competitive salary and good compensation packagePersonalized career growthProfessional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)Active tech communities with regular knowledge sharingEducation reimbursementMemorable anniversary presentsCorporate events and team buildingsOther location-specific benefits

*not applicable for freelancers