Senior Java Engineer (m/f/n) at InPost – Warsaw/Krakow/Remote | Jobyssey

Your responsibilities:

Engineering

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

Ownership & Delivery

Take full ownership of features end-to-end - from requirements to production and beyond
Work directly with business stakeholders to challenge assumptions and align on solutions
You understand your product deeply - the business context, the customer impact, the why behind every feature
Working across a large organisation with many teams is complex. You navigate that complexity, build bridges, and push things over the finish line
Write clear technical documentation: System Design docs, RFCs, and ADRs
Identify and address technical debt proactively - before problems become incidents
Participate actively in architecture discussions with well-reasoned proposals

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
Maven/Gradle, Git, JIRA, Confluence, Code Reviews, CI/CD
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, accelerate development, and solve complex problems.
Ability to critically evaluate AI-generated outputs and apply them responsibly within professional workflows.

Nice-to-have

Why Join InPost?

Opportunity to work in a diverse, international, and cross-functional environment, along with leading experts.
You work and learn from a senior leader and their leadership team, expanding your experience and exposure in the e-commerce and logistics industries.
InPost is a growing company that offers its people an increasing number of opportunities in several locations in Europe.
Fulfilling careers with a range of benefits and investing in providing training opportunities for people development.
You will feel a part of the InPost community that makes an impact on sustainability, convenient deliveries, and the circular economy every day.
Excellent working environment and flexible hours
We offer B2B type of Contract

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