Senior Software Developer (Java) - Third Party Ecosystem (all genders) New Berlin, Berlin, Germany

Senior Software Developer (Java) - Third Party Ecosystem (all genders)

Berlin, Berlin, Germany

Lightspeed is looking for a Senior Java Developer to join our team. As a Backend developer, you will support Lightspeed's Hospitality product group in our mission to expand our reach into new markets and countries while enhancing our advanced hospitality commerce platform.

For this role specifically, you will join our Third Party Ecosystem Squad. This team is dedicated to enabling integrations that make our flagship product a more complete and sticky solution, empowering partnerships to drive new business. By integrating third‑party services, you'll ensure seamless interoperability and enhance our platform's overall functionality and value. Your work will be pivotal in building a robust and flexible ecosystem that meets diverse customer needs.

Above all, your work will change the way the world experiences hospitality!

What You’ll Be Responsible For

• Developing and Optimizing Integrations: Focus on developing and optimizing third‑party integrations that enhance the functionality and stickiness of the K‑Series platform.
• Integration Design and Implementation: Design and implement integration solutions that expand our ecosystem, and ensure seamless interoperability with third‑party services.
• API Development: Build robust and complete RESTful APIs, ensuring they are well‑documented and adhere to standards such as OpenAPI.
• Clean Code and Documentation: Write clean, maintainable, and well‑documented code to support the scalability and reliability of our platform.
• Cross‑Functional Collaboration: Collaborate with Product Managers, Product Designers, and Platform Teams to achieve project objectives and enhance development practices.
• Performance Monitoring: Analyze system performance and implement monitoring solutions to ensure optimal operation and quick resolution of issues.
• Continuous Learning and Growth: Extend your skills by learning from and growing with the team, contributing to a culture of continuous improvement and innovation.

What You’ll Be Bringing to the Team

• Excellent communication skills in English.
• Outstanding Java knowledge with 5+ years of production usage experience.
• Expert knowledge of the Spring framework (Spring Boot, Spring MVC, Spring Security).
• Experience with both relational (SQL) and non‑relational (NoSQL) databases.
• Knowledge of monitoring applications for performance and reliability.
• Experience with real‑time messaging systems (Pub/Sub, Kafka, etc.).
• Solid understanding of computer science fundamentals, including object‑oriented programming and design patterns.
• Experience with building robust and complete RESTful APIs.
• Familiarity with API documentation and standards such as OpenAPI.
• Commitment to clean code, maintainability, and systematic correctness.

What will increase your chances:

• One additional backend language (Python, Go)
• Experience writing automated unit and functional tests
• Understanding of networking fundamentals (HTTP, TCP, TLS, etc.).
• Proficiency with CI/CD systems, Docker, and Kubernetes.
• Experience with cloud environments like AWS or GCP.
• Computer Science degree or equivalent.

Who You Are

• You are a team player who likes to contribute to discussions and share your experience.
• You are self‑motivated and can function effectively in a team environment with minimum supervision.
• You are always seeking improvement and progress.
• You are eager to make decisions and not afraid of making mistakes.

What’s in It for You

Come live the Lightspeed experience…

• Lots of autonomy, flexible work culture, and the possibility of remote work.
• Development of very high‑traffic products used at a global scale.
• Exposure to modern and proven technology.
• Opportunity to learn and expand your skill set.
• Tons of growth opportunities in technical or people management roles.
• Excellent benefits & perks, including equity for all Lightspeeders.
• Opportunity to join a fast‑paced, high‑growth company.
• Become a valued part of the diverse and inclusive Lightspeed culture.

… and enjoy a range of benefits that’ll keep you happy and healthy:

• Lightspeed share scheme (we are all owners).
• Mental health online platform and counseling & coaching services.
• Health and wellness benefits.
• LinkedIn Learning license (learning is always ongoing).
• Volunteer day to be able to give back to society!

Lightspeed is a proud equal opportunity employer and we are committed to creating an inclusive and barrier‑free workplace. Lightspeed welcomes and encourages applications from people with disabilities. Accommodations are available on request for candidates taking part in all aspects of the selection process.