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July 13, 2026

Kotlin/Java Tech Lead

Senior • Hybrid

26,000 - 30,000 PLN/mo

Warsaw, Poland

We are looking for a Kotlin/Java Tech Lead to join an e-commerce engineering team. In this role, you will lead the design and delivery of scalable backend platforms and services powering the company's customer-facing commerce experience across web, retail, and other sales channels. This is a hands-on technical leadership role.

You will guide engineering decisions, mentor other engineers, partner closely with product and design, and help the team deliver high-impact initiatives with strong engineering quality, scalability, and reliability.

Key takeaways

  • Stack: Kotlin/Java, Spring Boot, microservices, Docker, Kubernetes, AWS, PostgreSQL, CI/CD, Datadog, technical leadership experience
  • Salary: 26 000 PLN - 30 000 PLN gross on the Contract of Employment
  • Working model: Hybrid - 3 days/week from the office

Recruitment process

  • A call with recruiter
  • Panel interviews with the team (coding, architecture, and cross-collaboration interviews)

Responsibilities

Technical Leadership

  • Lead the delivery of small to large engineering initiatives, from technical discovery through implementation and production readiness.
  • Guide the team in making strategic backend architecture decisions that support scalability, performance, and long-term maintainability.
  • Own technical trade-offs and ensure solutions are aligned with business goals, user needs, and engineering standards.
  • Mentor engineers through design reviews, code reviews, and day-to-day technical collaboration.

Backend Engineering

  • Build and improve backend platforms and services.
  • Design and scale RESTful microservices used across web, retail, and other sales channels.
  • Develop backend services using technologies such as Java, Kotlin, Spring Boot, Docker, and Kubernetes.
  • Work with data stores such as PostgreSQL, MongoDB, DynamoDB, Elasticsearch, or similar technologies.

Delivery & Product Collaboration

  • Partner closely with product managers, designers, and peer engineers to scope, build, and deliver end-to-end features.
  • Translate product strategy and business requirements into reliable, scalable technical solutions.
  • Drive iterative delivery in an agile engineering environment.
  • Maintain strong relationships with stakeholders and ensure clear communication around scope, risks, and delivery progress.

Engineering Excellence

  • Promote strong engineering practices, including unit testing, test-driven development, CI/CD, observability, and production ownership.
  • Apply a DevOps mindset to build services that are reliable, observable, and easy to operate.

Requirements

Technical Expertise

  • 6+ years of professional software development experience.
  • Strong backend engineering experience with Java or Kotlin.
  • Proven experience building and scaling RESTful microservices.
  • Hands-on experience with Spring Boot, Docker, and Kubernetes.
  • Experience with cloud infrastructure such as AWS or GCP.
  • Familiarity with data stores such as PostgreSQL, MongoDB, DynamoDB, Elasticsearch, or similar technologies.
  • Experience with unit testing, test-driven development, and CI/CD pipelines.

Leadership Experience

  • Experience leading engineers to deliver high-impact technical projects.
  • Proven ability to mentor junior and mid-level engineers and support their technical growth.
  • Ability to guide technical decision-making, architecture discussions, and delivery planning.
  • Experience with end-to-end feature ownership in a cross-functional product environment.

Collaboration & Mindset

  • Strong communication skills and ability to work effectively with product, design, and engineering stakeholders.
  • Agile mindset with a strong focus on iterative design and delivery.
  • High ownership, strong delivery orientation, and ability to operate in a fast-moving engineering environment.
  • Strong desire to learn, share knowledge, and help engineers achieve their highest potential.

What we offer

  • 100% paid medical care
  • Multisport
  • Creative tax (KUP)
  • Home office allowance
  • MacBook Pro

If you enjoy technical leadership, hands-on backend engineering, and building platforms used at scale, this role is a strong opportunity to make a real impact. Please apply via the careers page and submit your CV in English.

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Their mission is to empower people to live fit, strong, long, and happy lives by delivering integrated experiences to millions of members anytime, anywhere. We are looking for a Senior and Mid Software Engineers to join the Content Cloud team . In this role, you will design and build high-performance backend systems that power content delivery across a global platform. You will act as a technical leader within the team, driving architectural decisions, mentoring engineers, and ensuring the reliability and scalability of systems used by millions of users. This is a hands-on role with strong ownership and impact on distributed, event-driven systems at scale. Key takeaways: Stack : Kotlin (main codebase) We're open to: Java/Go/TypeScript/JavaScript, Other tools: REST/gRPC/GraphQL, Kafka, Redis, PostgreSQL/MySQL, DynamoDB/MongoDB, AWS, Docker, Kubernetes Salary : Mid : 21 000 PLN - 23 000 PLN gross on the Contract of Employment Senior: 23 000 PLN - 30 000 PLN gross on the Contract of Employment Working model : Hybrid - 3 days/week from the office Location : ul. Grzybowska 60, Warsaw Recruitment process : A call with MOTIFE Recruiter Coding interview Panel interviews with the team (coding, architecture, and cross-collaboration interviews, Hiring Manager meeting) Responsibilities: Backend Architecture & Scalability Design and build high-performance, scalable backend services and APIs supporting global content delivery Architect event-driven systems and microservices handling large-scale traffic and real-time interactions Drive system design decisions with a focus on reliability, performance, and security Technical Leadership Lead technical discussions, architecture reviews, and design decisions across teams Define and promote reusable patterns, components, and engineering standards Mentor engineers through code reviews, pair programming, and technical guidance Performance & Reliability Identify system bottlenecks using monitoring, tracing, and load testing tools Optimize performance through data modeling, caching strategies, and query improvements Engineering Excellence Champion best practices including CI/CD, automated testing, observability, and infrastructure as code Maintain high standards for code quality, scalability, and maintainability Continuously improve development processes and system architecture Cross-Functional Collaboration Partner closely with Product, Design, and QA to deliver impactful features Translate business requirements into scalable technical solutions Act as a domain expert within the team and contribute to platform-wide initiatives Requirements: Technical Expertise 6+ years of experience building high-performance, scalable backend systems as Senior/4+ years of experience as a Mid Engineer Strong proficiency in Kotlin, Python, or similar backend languages Experience with modern backend frameworks (e.g., Spring Boot or Python-based frameworks) Strong experience with both relational (PostgreSQL, MySQL) and NoSQL databases (DynamoDB, MongoDB) Hands-on experience with microservices and event-driven architectures Experience with distributed streaming platforms such as Kafka Solid understanding of API design (REST, gRPC, or GraphQL) Cloud & Infrastructure Hands-on experience with AWS services (e.g., S3, DynamoDB, Lambda, SQS, IAM) Experience with Docker and Kubernetes Familiarity with infrastructure and deployment tooling (e.g., Terraform, GitHub Actions, Jenkins) Experience with caching systems such as Redis or Memcached Engineering Practices Strong understanding of CI/CD, DevOps, and Agile methodologies Experience with observability and monitoring tools (e.g., Datadog, Sentry) Proven experience in production support and incident management in distributed systems What we offer: 100% paid medical care Multisport Creative tax (KUP) Home office allowance MacBook Pro Apply now If this sounds like your next step, we’d love to hear from you! Please apply via our careers page and submit your CV in English.

Technology

ITDS

Senior Java Developer – Software Development Team

Senior

Hybrid

Warsaw, Poland

23,100 - 27,300 PLN

🏢 Summary: Java Tech Lead role focused on leading backend development and technical direction for enterprise applications in a hybrid work model. The position combines hands-on Java and Spring Boot development with architecture, mentoring, code quality, and Agile collaboration responsibilities. Candidates will work on secure, scalable microservices solutions while supporting engineering excellence and delivery efficiency. 🗂️ Requirements: 7+ years of Java backend development experience, Experience as Tech Lead or technical initiative lead, Core Java expertise, Spring Framework and Spring Boot experience, JPA and Hibernate knowledge, Oracle and SQL optimization experience, REST API development experience, OpenAPI knowledge, Microservices architecture knowledge, Git proficiency, Maven proficiency, Scrum experience, Backend security knowledge, Unit and integration testing experience, Fluent English 📃 Skills: Java, Spring, SpringBoot, JDBC, JPA, Hibernate, Oracle, SQL, REST, OpenAPI, Swagger, Microservices, Git, Maven, Scrum, Kubernetes, OpenSearch, Ansible, Jenkins, Sonar 🏢 Description: Empower innovative software solutions — shape the future of Java development! Warszawa-based opportunity with hybrid work model (up to 4 remote days per week) As a Java Tech Lead within our client's software development team, you will be working for a leading industry innovator delivering mission-critical enterprise applications. You will combine hands-on backend development with technical leadership, driving architectural decisions, mentoring developers, and ensuring engineering excellence across multiple applications. Working closely with stakeholders and Agile teams, you will remove delivery blockers, define technical direction, and build secure, scalable Java solutions that support long-term business growth and operational efficiency. Your main responsibilities: Lead technical solution discussions with business and engineering stakeholders Define technical direction and critical delivery paths for development initiatives Mentor developers and support the team's technical growth Ensure high-quality, secure and maintainable software aligned with engineering best practices Develop and maintain backend applications using Java and Spring Boot Perform code reviews and drive continuous code quality improvements Participate in technical analysis, architecture discussions and solution design Remove technical blockers and support efficient delivery across the development pipeline Participate in Scrum ceremonies and collaborate closely with cross-functional teams Take ownership of technical decisions and proactively identify improvement opportunities You're ideal for this role if you have: At least 7 years of experience in Java backend development Experience acting as a Tech Lead or leading technical initiatives within development teams Strong expertise in Core Java (Java 11–25), including JDBC, concurrency and memory management Solid experience with Spring Framework (Spring Boot 2–4) Experience with JPA (Hibernate) and Oracle databases, including SQL optimization Knowledge of messaging systems, REST APIs, OpenAPI (Swagger) and API First approach Strong understanding of microservices architecture, Git, Maven and Scrum Good understanding of backend security principles and software quality practices Experience writing high-quality unit and integration tests Fluent English It is a strong plus if you have: Experience with Kubernetes Experience with OpenSearch Experience with Ansible Experience with Jenkins, Sonar or other build and deployment automation tools Experience working in geographically distributed engineering teams Experience participating in technical architecture and solution design

Technology

ITDS

Senior Java Developer – Software Development Team

Senior

Hybrid

Warsaw, Poland

23,100 - 27,300 PLN

🏢 Summary: Hybrid Java Tech Lead role focused on leading backend development, defining technical architecture, and delivering secure, scalable enterprise applications using Java and Spring Boot. The position combines hands-on coding with mentoring, code quality oversight, and collaboration with Agile teams and stakeholders. Candidates will drive technical decisions and support long-term software delivery and operational efficiency. 🗂️ Requirements: 7+ years of Java backend development experience, Experience as Tech Lead or technical initiative lead, Core Java expertise, Spring Framework experience, JPA and Hibernate experience, Oracle and SQL optimization experience, REST API development knowledge, Microservices architecture knowledge, Git proficiency, Maven proficiency, Scrum experience, Unit and integration testing experience, Backend security knowledge, Fluent English 📃 Skills: Java, Spring, SpringBoot, JDBC, Concurrency, JPA, Hibernate, Oracle, SQL, REST, OpenAPI, Swagger, Microservices, Git, Maven, Scrum, Kubernetes, OpenSearch, Ansible, Jenkins, Sonar 🏢 Description: Empower innovative software solutions — shape the future of Java development! Warszawa-based opportunity with hybrid work model (up to 4 remote days per week) As a Java Tech Lead within our client's software development team, you will be working for a leading industry innovator delivering mission-critical enterprise applications. You will combine hands-on backend development with technical leadership, driving architectural decisions, mentoring developers, and ensuring engineering excellence across multiple applications. Working closely with stakeholders and Agile teams, you will remove delivery blockers, define technical direction, and build secure, scalable Java solutions that support long-term business growth and operational efficiency. Your main responsibilities: Lead technical solution discussions with business and engineering stakeholders Define technical direction and critical delivery paths for development initiatives Mentor developers and support the team's technical growth Ensure high-quality, secure and maintainable software aligned with engineering best practices Develop and maintain backend applications using Java and Spring Boot Perform code reviews and drive continuous code quality improvements Participate in technical analysis, architecture discussions and solution design Remove technical blockers and support efficient delivery across the development pipeline Participate in Scrum ceremonies and collaborate closely with cross-functional teams Take ownership of technical decisions and proactively identify improvement opportunities You're ideal for this role if you have: At least 7 years of experience in Java backend development Experience acting as a Tech Lead or leading technical initiatives within development teams Strong expertise in Core Java (Java 11–25), including JDBC, concurrency and memory management Solid experience with Spring Framework (Spring Boot 2–4) Experience with JPA (Hibernate) and Oracle databases, including SQL optimization Knowledge of messaging systems, REST APIs, OpenAPI (Swagger) and API First approach Strong understanding of microservices architecture, Git, Maven and Scrum Good understanding of backend security principles and software quality practices Experience writing high-quality unit and integration tests Fluent English It is a strong plus if you have: Experience with Kubernetes Experience with OpenSearch Experience with Ansible Experience with Jenkins, Sonar or other build and deployment automation tools Experience working in geographically distributed engineering teams Experience participating in technical architecture and solution design