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Join InPost’s Consumer & Merchant Domain / Send Team and work on business-critical systems responsible for key areas related to parcel creation and some of the largest initiatives across InPost. You’ll become part of a multidisciplinary team of senior engineers with a high level of autonomy, strong ownership, and real influence on solution architecture. The team values knowledge sharing, close collaboration, and a friendly working atmosphere. What you’ll be working on In this role, you’ll be responsible for the full software development lifecycle, from analysing a topic and designing the solution architecture to implementation, automated testing, and deployment. Your responsibilities will include: Designing and implementing microservices following Hexagonal Architecture principles Actively contributing to architectural decisions and solution design Building event-driven integrations using Kafka, Avro, and Transactional Outbox Writing comprehensive automated tests, including unit, integration, and contract tests Participating in code reviews and maintaining high code-quality standards Taking ownership of assigned topics, identifying relevant stakeholders, and independently gathering the information needed to deliver solutions end-to-end Using AI-assisted development tools such as Claude Code as part of your daily development workflow Tech stack Java 21 Spring Boot 3.x / 4.x, MVC & WebFlux Gradle PostgreSQL, JPA/Hibernate, R2DBC MongoDB Apache Kafka, Avro, Confluent Schema Registry Hexagonal Architecture, Microservices, Event-Driven Design, Transactional Outbox OAuth2 / JWT, Spring Security, OpenFGA Spock Framework, Testcontainers, WireMock, REST-Assured, ArchUnit, PIT Mutation Testing GitLab CI, Docker, Kubernetes, Helm Micrometer, Prometheus, SonarQube, Checkstyle, CodeNarc We’re looking for a Senior-level Software Developer who has: Strong experience with Java 21+ and Spring Boot, including MVC and/or WebFlux Hands-on experience with Kafka Experience with PostgreSQL and/or MongoDB Good understanding of Hexagonal / Clean Architecture and microservices patterns Experience with automated testing, such as Spock or JUnit, Testcontainers, and contract testing Experience with Kubernetes, Helm, and GitLab CI Solid understanding of OAuth2/JWT-based security Proficiency with AI coding tools. Claude Code is the company standard, while experience with equivalent agentic coding tools such as GitHub Copilot or Cursor is also relevant The challenges You’ll be working within a highly complex distributed environment consisting of dozens of microservices and numerous communication channels. Understanding the wider system landscape will be just as important as working effectively with individual components. The role also comes with a high degree of autonomy from day one. You’ll be expected to independently analyse topics, identify the right stakeholders, gather the necessary information, and take ownership of delivering solutions end-to-end. AI-assisted development is an integral part of the team’s way of working. Claude Code is used at scale, and working effectively in an agentic, AI-first development workflow is a core expectation for this position. Please note that while the role is remote, the final stage of the recruitment process is conducted in person at our Warsaw office, so candidates are expected to be available and willing to travel to Warsaw for this meeting. 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 for people and investing in providing training opportunities for their 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 InPost Group is an innovative European out of home deliveries company, revolutionizing the way parcels are delivered to customers. With operations across several countries, our network of intelligent lockers provides customers with a fast, convenient, and secure delivery option. InPost Group is a publicly traded company, with a market capitalization of about $5 billion as of March 2023. With over 10,000 people worldwide, InPost Group is one of the largest out of home delivery providers in Europe, committed to providing sustainable and efficient delivery solutions to meet the evolving needs of customers in today's rapidly changing landscape. We are a team that builds the best FMCG e-commerce in Poland. We already have over 300,000 products in our offer, we work with over 300 sellers, and our mobile application has already been downloaded by almost 1.5 million users in Poland. Due to the fact that our product consists of many elements that must work together efficiently and be managed effectively, we are looking for experienced consumer-focused (Web / Mobile App products) engineering leaders to join us in that journey - heavily influence our future platform build, improve processes and help us deliver best customer experience in the market across all types of devices. Originally posted on Himalayas