Want to get hired at GLS NXT?

Freelance SDET - Backend/API Focus

GLS NXT

HybridHybrid

Original Job Summary

Job Overview

GLS NXT is seeking a Freelance Software Development Engineer in Test (SDET) with a strong focus on backend services and APIs to ensure robust, scalable, and reliable platform releases.

Tasks & Responsibilities

  • Design and implement automated API and integration tests for backend microservices.
  • Develop reusable test frameworks and libraries with backend engineers.
  • Maintain test coverage across multiple services for data consistency and reliability.
  • Integrate automated tests throughout CI/CD pipelines (build, deploy, release).
  • Investigate complex backend issues using logs, metrics, and traces.
  • Continuously enhance test infrastructure with scalability and maintainability in mind.

Requirements

  • 2–4 years of experience in software testing or automation engineering.
  • Programming experience in Java, Kotlin, or Go.
  • Strong understanding of REST/GraphQL APIs and event-driven architectures.
  • Hands-on experience with API testing frameworks (REST-assured, Ktor, Playwright API, Postman/Newman).
  • Experience with CI/CD systems (GitHub Actions, GitLab CI, Jenkins) and version control (Git).
  • Practical knowledge of Docker and Kubernetes.
  • Strong debugging skills using logs, metrics, and distributed tracing tools like Datadog, OpenTelemetry, Grafana.
  • Solid understanding of QA methodologies.

Benefits

  • Dynamic and international digital workplace.
  • Flexible hybrid working mode with tailored remote policy.
  • Modern office space in Berlin Mitte with top-tier equipment.

About GLS/NXT

GLS/NXT drives next generation logistic experiences in the Logistics and eCommerce sectors by combining startup agility and corporate robustness. The teams operate with business responsibility and passion for user needs.

Commitment to Diversity

GLS/NXT is an equal opportunity employer, committed to creating an inclusive environment regardless of race, gender, or background.

Key skills/competency

  • Automation
  • Backend
  • API
  • CI/CD
  • Testing
  • Microservices
  • Debugging
  • Scalability
  • Containers
  • SDET

How to Get Hired at GLS NXT

🎯 Tips for Getting Hired

  • Research GLS NXT's culture: Understand their mission and tech focus.
  • Customize your resume: Highlight backend and API testing experience.
  • Prepare technical examples: Demonstrate CI/CD and debugging skills.
  • Practice interview questions: Focus on test automation and problem-solving.

📝 Interview Preparation Advice

Technical Preparation

Review API automation frameworks.
Practice backend language coding exercises.
Study CI/CD tools and pipeline integration.
Test microservices using containerized environments.

Behavioral Questions

Describe collaboration with cross-functional teams.
Explain handling project timeline pressures.
Discuss problem-solving during backend failures.
Share teamwork experiences and conflict resolution.