Senior Backend Engineer

We are DONE!Berlin, an international consulting company that specializes in helping fast-growing companies of all sizes navigate the ever-changing world of work. Among other things, we help our clients attract the best talent for their company.

Join our clients team at GLS/NXT as a Senior Backend Engineer and help shape the future of out-of-home delivery. They’re building the OOH Platform - a scalable system that empowers carriers across multiple countries to deploy, manage, and optimize parcel locker networks with ease.

At GLS/NXT, you’ll work at the intersection of startup energy and enterprise muscle - moving fast, experimenting freely, and owning your work end-to-end. The company cares deeply about solving real user problems and building reliable, high-quality backend systems that make logistics smarter and more connected.

If you’re driven by impact, thrive in a collaborative and fast-moving environment, and love turning complex challenges into elegant and simple technical solutions, they’d love to have you on board

Tasks

• Design, build, and maintain server-side applications with a focus on performance, scalability, and reliability.
• Collaborate with cross-functional teams to define, design, and ship new features and improvements.
• Drive best practices in code quality, security, and testing across the development lifecycle.
• Troubleshoot, debug, and upgrade existing software systems proactively and effectively.
• Stay current with emerging technologies and industry trends to continuously drive innovation within the team.

Requirements

• 5+ years of proven experience as a Backend Engineer or in a similar role within a cross-functional team environment.
• Proficiency in Kotlin for backend development.
• Strong hands-on experience with Spring Boot, building robust and scalable services.
• Solid experience with SQL and relational databases, including schema design and performance optimization.
• Experience with event-driven architectures (e.g., Kafka, SNS/SQS).
• Proficiency in REST API design principles, microservices architecture, and cloud-based services (preferably AWS).
• Experience deploying applications using containerization and orchestration tools (e.g., Docker, Kubernetes).
• Comfortable working in an Agile environment, embracing incremental delivery and continuous feedback.
• Strong problem-solving and analytical skills, with a keen eye for debugging and performance tuning.
• Excellent written and verbal communication skills in English, with the ability to explain complex technical concepts clearly to diverse audiences.

Benefits

• Dynamic workplace: A digital environment with international projects and space to learn and grow
• Flexible work conditions: Hybrid working mode with a tailored remote policy
• Focus on learning: A personal budget (1.000€) for learning and development initiatives
• Physical space for ideas: A great office space in Berlin Mitte with top-tier equipment
• Transparent and competitive compensation: A salary package that reflects your expertise and experience.
• Active participation: A clear bonus system enabling participation in your and the team’s performance
• Engaging team culture: Monthly team cooking, regular events and offsites
• Vacation policy: 30 days of yearly holiday
• Reward system: Rewards for the recommendation of additional team members

If this job description speaks to you, don't waste any time and apply now!