Staff Software Engineer (C#)

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.

As part of their continued expansion in Poland were looking for a Staff Software Engineer. You will join the team that builds the backend services behind music ingestion metadata processing content catalogue management and music delivery to user-facing applications including a new Swift-based app developed in Poland.

Key takeaways:

Stack:

• must-have: C# / .NET;
• nice-to-have: Java/Kotlin and Swift
• we also work with: Docker Kubernetes GraphQL AWS (S3 SQS Lambda) NServiceBus / RabbitMQ

Monthly Salary: 25000 PLN - 30000 PLN gross on Contract of Employment (UoP)

Working Model: Hybrid - 3 days weekly from the office

Location: Warsaw ul. Grzybowska 62

Recruitment Process:

1. A call with Motife recruiter - 30 minutes
2. Intro call with the Hiring Manager - 45 minutes
3. Interview panel - 3 meetings with key stakeholders (technical system design team fit) - 3h in total

Responsibilities:

Backend Development & API Ownership

• Build and maintain services and APIs powering music ingest metadata processing class planning tools and music playback features.
• Develop clean maintainable and well-tested code with a focus on scalability.

System & Architecture Collaboration

• Participate in architecture discussions design reviews and technical planning.
• Contribute to evolving the microservices ecosystem with simplicity reliability and performance in mind.

Operational Excellence

• Promote CI/CD automation monitoring logging and high-quality engineering practices.
• Ensure the reliability and integrity of the codebase through refactoring reviews and pair programming.

Cross-Functional Partnership

• Work closely with Product Design and QA to deliver impactful features.
• Become a subject-matter expert in how music pipelines and catalogue systems operate.

Requirements:

Technical Expertise

• 5 years of professional experience as a software engineer.
• Strong proficiency in C# /.NET (core requirement).
• Nice to have: experience with Java or Kotlin and/or exposure to Swift.
• Understanding of distributed systems microservices and RESTful APIs.
• Familiarity with NoSQL databases (MongoDB is a plus but not required).

Engineering Practices

• Experience working with CI/CD pipelines testing strategies and cloud-based environments.
• Ability to design and build maintainable scalable services.
• Comfortable working in fast-paced high-growth environments.

Bonus Points (we work with these but they are not mandatory):

• Containerization and orchestration (Docker Kubernetes).
• GraphQL-based APIs.
• AWS ecosystem: S3 SQS Lambda.
• Message bus technologies: NServiceBus RabbitMQ or similar.

Mindset & Collaboration

• Strong communication skills in English.
• Curiosity proactiveness and a desire to grow as part of a cross-functional team.
• A pragmatic approach to problem-solving and continuous improvement.

What we offer:

• 100% paid medical care in LuxMed
• Sportscard
• MacOS laptop
• Work From Home Stipend

Apply now

If youre passionate about creating software that powers world-class connected fitness products wed love to hear from you. Apply through our careers page with your CV in English.

Required Experience:

Staff IC