Kotlin/Java Tech Lead

We are hiring on behalf of our client, a global innovator in fitness and wellness technology. 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 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

Location: ul. Grzybowska, Warsaw

Recruitment process:

• A call with MOTIFE 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

Apply now

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 our careers page and submit your CV in English.