InPost

Runs automated parcel lockers and PUDOs

Senior Java Engineer

Backend EngineeringConfirmed live in the last 24 hours

Full-timeWarsaw, PolandNo salary listed

About the Job

Requirements

At least 5 years of commercial Java development, including Java 11/17 or later, Spring Boot, Spring Security, and JPA/Hibernate.
Strong experience with distributed systems, including microservices, event-driven patterns, and inter-service communication.
Deep knowledge of JVM internals, including the memory model, garbage-collection tuning, concurrency, and performance profiling.
Experience with Apache Kafka producers, consumers, consumer groups, offset management, and error handling.
Experience with PostgreSQL relational modeling, indexing strategies, query plans, and schema migrations.
Day-to-day production usage of Docker and Kubernetes.
Experience with Maven or Gradle, Git, JIRA, Confluence, code reviews, and CI/CD.
Ability to work with non-technical stakeholders and write design documents.
English proficiency at B2 or higher for team and stakeholder communication.
Proficiency in using AI tools and large language models, such as GitHub Copilot, ChatGPT, and Claude, to improve productivity, accelerate development, and solve complex problems.
Ability to critically evaluate AI-generated outputs and use them responsibly in professional workflows.

Responsibilities

Design and implement high-performance microservices in Java and Spring Boot.
Build and maintain event-driven integrations using Apache Kafka.
Own the data layer, including schema design, query optimization, and migrations using PostgreSQL.
Work in a containerized cloud-native environment using Docker, Kubernetes, and GCP.
Maintain code quality through reviews, testing standards, and CI/CD practices.
Mentor team members and promote a culture of quality and continuous improvement.
Own features end-to-end, from requirements through production and beyond.
Work directly with business stakeholders to challenge assumptions and align on solutions.
Understand the product's business context, customer impact, and rationale for each feature.
Navigate cross-team complexity in a large organization, build bridges, and drive work to completion.
Write technical documentation, including system design documents, RFCs, and ADRs.
Proactively identify and address technical debt before it becomes an incident.
Participate in architecture discussions and present well-reasoned proposals.

Desired Qualifications

Kotlin development experience.
Knowledge of Domain-Driven Design, CQRS, or Event Sourcing.
Experience with gRPC or GraphQL.
Experience with GCP services such as Cloud Functions, Pub/Sub, GKE, or Cloud Spanner.
Experience with MongoDB.
Experience with high-throughput, low-latency systems.
Background in e-commerce, logistics, or fintech.

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
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

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?

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

About the Company

InPost

Runs automated parcel lockers and PUDOs

InPost operates a European logistics and e-commerce platform built around automated parcel lockers (APMs) and pick-up/drop-off points (PUDOs). The system lets customers send, receive, and return parcels 24/7 by using lockers or door-to-door services, with retailers integrated into the network. It differentiates itself through its large, pan-European locker network, strategic acquisitions, and a focus on sustainable, out-of-home last-mile delivery. Its goal is to simplify e-commerce logistics, improve convenience for merchants and consumers, and expand its reach while reducing environmental impact.

Company size: 1,001-5,000
Company stage: IPO
Headquarters: Kraków, Poland
Founded: 2006

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