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.

You’ll join the core web team responsible for the main website product, powering high-traffic, highly available services that serve millions of users daily.

About the Role

We’re looking for a Full-Stack Developer with strong front-end expertise, especially in React, to help build and maintain core features of our main website and its supporting infrastructure.

You’ll work across the stack — developing scalable user-facing experiences, improving backend integrations, and contributing to the performance, reliability, and robustness of high-traffic services.

This is a hands-on role in a fast-paced environment with real ownership and opportunities for growth.

Responsibilities

• Develop full-stack features for the main 365Scores website, with a focus on modern, performant front-end experiences.

• Build reusable, scalable React components using best practices.

• Contribute to backend development using Node.js and .Net C# (and other languages when needed).

• Improve performance, reliability, and SEO for high-traffic pages.

• Work with infrastructure tools such as CI/CD pipelines, monitoring dashboards, and cloud-based deployments.

• Integrate with internal APIs and existing databases while maintaining system stability at scale.

• Collaborate with designers, product managers, and senior developers to deliver high-quality features quickly.

• Participate in code reviews, maintain coding standards, and contribute to improving development workflows.

• Investigate production issues, propose solutions, and help optimize website loading speed, caching, and overall architecture.

  
  

Requirements

• 3–4 years of hands-on full-stack development experience, with a strong orientation toward front-end development.

• Deep knowledge of React, JavaScript, TypeScript, and modern front-end tooling.

• Experience building responsive, SEO-friendly, high-performance web applications.

• Strong backend development fundamentals, preferably with Node.js (experience with .NET or Python is a plus).

• Familiarity with relational or NoSQL databases.

• Experience with CI/CD workflows, cloud environments (AWS/GCP), and containerized environments (Docker/Kubernetes).

• Strong debugging skills and the ability to work on high-traffic systems.

• Team player with strong communication and collaboration skills.

• Ability to thrive in an agile, dynamic environment.

‍

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