GLS/NXT

Senior Backend Engineer

Berlin, Germany full-time Mid Salary not listed
full-time Mid level Technology & IT Curated
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About the role

Join GLS/NXT as a Senior Backend Engineer and help shape the future of out-of-home delivery. We’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. We care 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, we’d love to have you on board. Let’s build the future of logistics - together.

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

About GLS/NXT

GLS/NXT was founded with the mission to build the next generation of logistic experiences driven by technology - core, adjacent & beyond. More specifically, our sphere of interest is the Logistics and eCommerce sector. We are entrepreneurs and hence always start with the user's needs. We are located between Corporate and Startups and leverage the benefits from both (startup speed and corporate muscle). GLS/NXT inhabits different project teams, acting as startups with business responsibility and setting their own vision and mission. GLS/NXT is part of the GLS IT Services GmbH.

Commitment to Diversity

GLS/NXT is an equal opportunity employer, which means we do not discriminate on the basis of race, colour, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression. We celebrate diversity and are committed to creating an inclusive environment for all employees.

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Interview prep

Walk in with sharper answers.

Use this as a quick practice sheet before you speak with the employer.

Mid
Technology & IT API integration MySQL Operations Project Management Remote Collaboration Mid level

Likely questions

  1. Tell us about work you have done that is close to the Senior Backend Engineer role.
  2. How would you approach your first 30 days at GLS/NXT?
  3. Which of API integration, MySQL and Operations have you used recently, and what did it help you achieve?
  4. Describe a time you solved a problem without waiting to be told exactly what to do.
  5. How do you handle busy days, changing priorities, or pressure at work?

Prepare before the call

  • A recent example that proves your experience with API integration, MySQL and Operations.
  • One short story with a problem, your action, and the result.
  • Two examples that show the strengths listed on your CV.
  • A clear reason why this role and company interest you.
  • Your availability, preferred work style, and salary expectations.

Ask them

  • What would success look like in the first 90 days?
  • What are the main problems this hire should help solve?
  • How does the team give feedback and measure good work?
  • What does a normal working week look like for this role?
Practice line

I am interested in the Senior Backend Engineer role because I can bring practical experience in API integration, MySQL and Operations, learn the team quickly, and contribute to the outcomes GLS/NXT needs from this hire.

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