Senior Java Engineer

InPost Group

Senior Java Engineer developing microservices using Java/Spring Boot at InPost Group. Collaborating within diverse teams, enhancing delivery solutions in the e-commerce landscape.

Posted 7/2/2026full-timeRemote • Warsaw • 🇵🇱 PolandSeniorWebsite

Tech Stack

Tools & technologies

ApacheCloudDistributed SystemsDockerGoogle Cloud PlatformHibernateJavaKafkaKubernetesMicroservicesPostgresSpringSpring BootSpringBoot

About the role

Key responsibilities & impact

Design and implement high-performance microservices in Java / Spring Boot
Build and maintain event-driven integrations using Apache Kafka
Own the data layer: schema design, query optimisation, migrations (PostgreSQL)
Work within a containerised cloud-native environment: Docker, Kubernetes, GCP
Hold the bar on code quality through reviews, testing standards, and CI/CD discipline
Mentor team members and advocate for a culture of quality and continuous improvement
Take full ownership of features end-to-end - from requirements to production and beyond
Write clear technical documentation: System Design docs, RFCs, and ADRs
Participate actively in architecture discussions with well-reasoned proposals

Requirements

What you’ll need

5+ years of commercial Java development (Java 11/17+, Spring Boot, Spring Security, JPA/Hibernate)
Strong experience with distributed systems - microservices, event-driven patterns, inter-service communication
Deep JVM internals: memory model, GC tuning, concurrency, performance profiling
Apache Kafka - producers, consumers, consumer groups, offset management, error handling
PostgreSQL - relational modelling, indexing strategy, query plans, schema migrations
Docker + Kubernetes - day-to-day production usage
Proven ability to work with non-technical stakeholders and write design documents others want to read
English B2+ - team and stakeholder communication
Proficiency in leveraging AI tools and large language models (e.g., GitHub Copilot, ChatGPT, Claude) to enhance productivity.

Benefits

Comp & perks

Excellent working environment and flexible hours
Opportunity to work in a diverse, international, and cross-functional environment
Professional development opportunities

ATS Keywords

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Hard Skills & Tools

JavaSpring BootSpring SecurityJPA/HibernateApache KafkaPostgreSQLMicroservicesEvent-Driven PatternsCI/CDPerformance Profiling

Soft Skills

MentoringCommunicationCollaborationContinuous ImprovementTechnical Documentation