Senior Full Stack Developer

365Scores is a global sports tech hub, serving tens of millions of users with real-time results, stats, news, and content across all major sports. They combine deep tech, live data, and massive scale to deliver one of the most engaging sports experiences in the world.

We’re now building a new product, and this is your chance to shape its infrastructure and development from day one.

About the Role

We’re looking for a Senior Full Stack Developer to plan and build the architecture, infrastructure, and application layers of a new product from the ground up. You’ll work on backend and frontend features, connect to existing databases, build scalable services, and deliver impactful user experiences.

This is a hands-on role where you’ll collaborate closely with a small, elite team and take ownership of architectural planning and full-stack development. If you’ve launched systems from scratch and enjoy making core technical decisions — this is a great fit.

Responsibilities

• Build full-stack infrastructure and features for a new product, integrating with existing databases and APIs

• Develop scalable backend services and endpoints using modern frameworks.

• Create performant, intuitive front-end components using React, TypeScript, and modern tooling

• Set up and manage infrastructure tools (CI/CD, cloud services, monitoring, deployment pipelines)

• Work cross-functionally with designers, product managers, and other developers to deliver MVP and iterate quickly

• Ensure high-quality code, maintainability, security, and performance

• Identify scalability issues and help shape long-term technical architecture

• Keep up to date with modern development practices and introduce relevant improvements

  
  

Requirements

• 5+ years of hands-on full stack development experience

• Proven experience in planning and building full-stack systems from scratch, including architecture decisions and integration with existing infrastructure

• Strong backend development skills, especially in Node.js (experience with .NET or Python is also a plus)

• Solid experience integrating with existing SQL or NoSQL databases.

• Deep knowledge of React, JavaScript, TypeScript, and HTML/CSS

• Familiarity with cloud platforms (e.g., AWS, GCP), CI/CD workflows, and scalable deployment practices

• Strong problem-solving skills and a proactive, ownership-driven mindset.

• Ability to collaborate cross-functionally and thrive in a fast-paced, agile environment

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Benefits

• Work in a highly professional team. Informal and friendly atmosphere in the team

• Paid vacation — 20 business days per year, 100% sick leave payment

• Equipment provision

• Partially compensated educational costs (for courses, certifications, professional events, etc.)

• Legal and Accounting support in Poland

• Ability to work from our comfortable office in Warsaw at Prosta 51

• 5 sick days per year

• ‍Medical insurance (after the end of the probationary period)

• Flexible working hours — we care about you (!) and your output

• English and Polish classes 2 times a week (online)

• Bright and memorable corporate life: corporate parties, gifts to employees on significant dates