. Your missionAs a Senior Backend Engineer at Playtomic, you will be responsible for developing robust and scalable solutions for our product, ensuring high performance, consistent and secure transactions. What you'll be doing- Develop and maintain APIs and their services, enabling seamless communication between the frontend and backend, and facilitating third-party integrations.- Work closely with cross-functional teams, including product managers, product designers and frontend/mobile engineers, to devise innovative solutions.- Ensure high performance and responsiveness to requests from the frontend- Maintain a high code quality by continuously optimizing and improving our backend through code reviews, profiling, and implementing best practices and company's standards. Who you'll be playing withYou will be part of the engineering team (30 people) reporting directly to an Engineering Manager, working in daily collaboration with Product and other engineers. Our Ideal "Player"- Proven experience as a Backend Engineer. Familiarity with the whole web stack, including protocols, system architecture, database design, and web server optimization techniques. In particular, experience with Spring Boot 3, Java 17, MongoDB, MySQL (aurora), Kubernetes is preferred.- Extensive experience in designing, developing, and maintaining APIs.- Strong communication skills to convey complex technical concepts to non-technical stakeholders.- Strong analytical and problem-solving skills with a proactive approach to identifying and addressing technical challenges.- Ability to adapt to a fast-paced and dynamic work environment, with a focus on delivering high-quality solutions within specified timelines.- Located in Madrid or able to travel to Madrid when needed- Excellent spoken and written English is a must- Degree in Computer Science, Engineering, or related field Extra points- Proven track record in designing and implementing payment systems or financial platforms.- Experience working with remote and partially remote and multicultural teams.- Experience working in start-ups and scale-ups What's in it for you- Salary 60k-80k- Social benefits (63 € a month in one of these: health insurance/tickets restaurant), flexible salary in training and kindergarten.- Gympass discounts in several plans that include gyms, personal classes, access to free apps of wellbeing, nutrition etc.- Annual budget for training- Opportunity to work in a top international team- 23 days of vacation + day off on your birthday + 2 days off for Wellness days in August.- 1 additional day off per year worked. Our hiring process- 1st interview with People Team- 2nd interview with Playtomic's Engineering Managers, Technical Leadership and Product to assess your technical, product and communication skills.- Final Interview with Playtomic's CTO.About PLAYTOMIC We are world's largest racket sports App for players and clubs