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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 Kotlin development experience Domain-Driven Design (DDD), CQRS, Event Sourcing gRPC, GraphQL GCP: Cloud Functions, Pub/Sub, GKE, Cloud Spanner MongoDB Experience with high-throughput, low-latency systems Background in e-commerce, logistics, or fintech 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 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 currently hiring Senior Engineers for two different teams: 1. InPost Pay - a comprehensive e-commerce solution offering a unified platform for payment and delivery. InPost Pay allows users to pay and arrange delivery with one button on the product card, transferring the basket and order to the InPost app. It simplifies the shopping experience by consolidating payments, deliveries, and order tracking into a single app, eliminating the need for multiple emails and messages from different stores → Hybrid model: 1 day per week from the office in Warsaw or Kraków, remaining days remote 2. Merchant Portal - a new, InPost-owned platform that serves as a central hub for all merchant-facing services. This covers the full merchant journey: onboarding, shipping, and access to other InPost products. The team acts as a core/platform team, meaning they provide shared services and infrastructure consumed by other InPost teams. → Fully remote position Originally posted on Himalayas