Senior Full Stack Engineer

Expected, Kotlin, Java, TypeScript, JavaScript, React.js, PostgreSQL, MongoDB, DynamoDB, Elasticsearch, Kubernetes, Terraform, GitHub Actions, Jenkins

Operating system, macOS

About the project, 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., , This role sits within the Device Services organization, in the team responsible for commercial initiatives. As a Senior Full Stack Engineer, you will help build software for a new generation of commercial fitness experiences in heavy-use environments such as gyms, hotels, universities, and residential buildings., , You will work across backend services and web applications, with a stronger focus on backend and platform development, and play a key role in shaping operator tooling, guest device experiences, and the systems that support them. This is a hands-on senior individual contributor role for someone who thrives in ambiguity, takes ownership, and wants to influence both technical direction and product outcomes., , Key takeaways:, , Kotlin (main codebase) and React, We're open to: Java/Go/TypeScript/JavaScript,, Other tools: REST microservices, Kubernetes, Terraform, PostgreSQL, DynamoDB, Elasticsearch, GitHub Actions, Jenkins, Working model: Hybrid - 3 days/week from the office

Your responsibilities, Build backend services and web-based tooling that support commercial Peloton devices in heavy-use environments., Develop features for signed-out and guest device experiences that enable seamless product use without a Peloton membership., Create internal and external-facing operator tools that provide visibility into device health, status, and performance., Deliver scalable, secure, and maintainable software across APIs, services, and frontend applications., Own technical initiatives end to end, from scoping and design through implementation and rollout., Drive backend-heavy development across service architecture, authentication, platform exposure, and infrastructure-related work., Improve system simplicity by identifying reusable patterns, reducing complexity across services, and contributing to engineering standards., Collaborate on solutions involving observability, fleet management, and platform capabilities used across device teams., Partner closely with engineers, product managers, and cross-functional stakeholders to define requirements and turn ambiguity into execution., Contribute to code reviews, design discussions, whiteboarding, and shared technical decision-making., Communicate clearly with distributed teams across the US and Poland., Support a strong team culture built on ownership, speed, collaboration, and continuous learning.

5+ years of professional software engineering experience., Strong experience building backend services and web applications in modern production environments., Commercial experience with Kotlin, Java, Python, TypeScript, JavaScript, or similar backend-oriented languages., Hands-on experience with RESTful microservices and service-based architectures., Good knowledge of at least one modern frontend framework such as React, Vue, or similar., Experience working with data stores such as PostgreSQL, MongoDB, DynamoDB, or Elasticsearch., Familiarity with cloud-native development, containerized environments, and deployment tooling such as Kubernetes, Terraform, GitHub Actions, or Jenkins., Excellent communication skills in English.

This is how we work, in house, you develop several projects simultaneously, you have influence on the technological solutions applied, you have influence on the product, you focus on product development, agile

This is how we work on a project, Continuous Deployment, Continuous Integration, DevOps

What we offer, 100% paid medical care, Multisport, Creative tax (KUP), Home office allowance, MacBook Pro

Recruitment stages, A call with MOTIFE Recruiter , Coding interview, Panel interviews with the team

If you’re excited about building developer platforms that scale, empower teams, and set new standards for engineering excellence, we’d love to hear from you. Apply via our careers page and please submit your CV in English.