Senior Java Engineer - hybrid (m/f/n)
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Before you apply
LocationWarsaw/Cracow, pl
Work modehybrid
Typefull-time
SenioritySenior
Experience5+ yrs
Company size1,001–5,000 people
PostedOct 14, 2026 · 3w ago
Verified live1d ago
At a glanceSummarised by Seekless from the posting.
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
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
Skills
Java
Spring Boot
Apache Kafka
PostgreSQL
Docker
Kubernetes
GCP
Maven
Gradle
Git
JIRA
Confluence
GitHub Copilot
ChatGPT
Claude
Kotlin
gRPC
GraphQL
MongoDB
Benefits
Flexible hours
Training opportunities
Company Description
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.
About the role
We are currently hiring Senior Engineers for 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
Job Description
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
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Hold the bar on code quality through reviews, testing standards, and CI/CD discipline
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Mentor team members and advocate for a culture of quality and continuous improvement
Ownership & Delivery
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Take full ownership of features end-to-end - from requirements to production and beyond
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Work directly with business stakeholders to challenge assumptions and align on solutions
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You understand your product deeply - the business context, the customer impact, the why behind every feature
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Working across a large organisation with many teams is complex. You navigate that complexity, build bridges, and push things over the finish line
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Write clear technical documentation: System Design docs, RFCs, and ADRs
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Identify and address technical debt proactively - before problems become incidents
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Participate actively in architecture discussions with well-reasoned proposals
Qualifications
•
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
Additional Information
Why Join InPost?
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Opportunity to work in a diverse, international, and cross-functional environment, along with leading experts.
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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.
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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.
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Excellent working environment and flexible hours
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We offer B2B type of Contract