Senior Software Engineer Fullstack

M/F/D - T.S. GmbH - Köln

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About

T.S. GmbH develops SaaS solutions for more than 40 million consumers and 30,000 businesses across Europe. Our product portfolio includes offerings such as the Trustmark, Buyer Protection, and the eTrusted platform for customer reviews. These products are part of our 20-year mission to foster trust between people and businesses in the digital age.

Our product development is housed within the Products & Engineering department, which consists of 15 cross-functional product teams across three product domains (Consumer, Business, and Platform), working in an agile environment.

Strengthen our team as a talented and motivated (Senior) Software Engineer (f/m/d) Fullstack in our Platform Domain– especially if you thrive in dynamic environments, enjoy solving complex problems through code, and are driven to continuously improve the user experience.

In this role, you will be part of our Trstd Login Team, where we are developing the next generation of secure and user-friendly authentication tools – with the goal of building trust between users and businesses.

Your responsibilities as a Senior Software Engineer (f/m/d) Fullstack:

  • Work closely within a cross-functional product team – with talented engineers (f/m/d), a product manager (f/m/d), QA engineer (f/m/d), cloud engineer (f/m/d), and an agile coach (f/m/d). Together, you’ll design reliable, scalable, and impactful solutions.

  • Develop cross-platform web components, applying in-depth knowledge of leading e-commerce systems such as Shopware, PrestaShop, WooCommerce, Magento, and Shopify. Your experience ensures seamless integration and optimal performance across all environments.

  • Implement secure system communication using OAuth2 and OIDC, and approach engineering challenges with a language-agnostic mindset. You’ll rely on proven, stable technologies following the “Choose Boring Technology” philosophy.

  • Take full ownership of your work from end to end in a “You build it, you own it” culture – from feature development through CI/CD deployments to monitoring and infrastructure automation using Terraform and Infrastructure as Code (IaC).

Why work at T.S. GmbH?

  • Personal Development: You will receive direct support from your Engineering Manager to ensure your growth and success.

  • Health and Wellbeing: Take part in monthly health activities and earn an extra vacation day for reaching health goals.

  • Continuous Learning: Enjoy your “Self Education Day” on the last Friday of each month to focus on personal development, attend internal tech talks, read a book, or work on your goals.

  • Inclusive Work Culture: Flexible work options and a strong focus on work-life balance. Working late into the night is not expected.

A typical day as a Senior Software Engineer (f/m/d) Fullstack at T.S. GmbH:

  • Start your day by setting up your remote workspace or your desk at the office.

  • Check your personal task manager to keep track of projects and tasks, from short-term to-dos to progress on larger epics.

  • Join the daily team stand-up to sync with colleagues on the sprint backlog or Kanban board, align on priorities, and pursue shared goals.

  • Focus on sprint stories, tasks, or bug fixes – working individually or through pair or mob programming with the team.

  • Enjoy a flexible lunch break, whether it’s a home-cooked meal or a relaxed lunch out with teammates nearby.

  • Spend the afternoon in focused work sessions, tailored to your team’s rhythm and preferences.

  • Use your monthly Self Education Day for personal growth with a learning plan of your choice – free of meetings.

  • End your day with team-building events like Waffle Day or enjoy a drink on the rooftop terrace.

Your Profile:

  • You have extensive experience in both frontend and backend development, with a focus on Node.js, TypeScript, and JavaScript, along with solid knowledge of HTML and CSS.

  • You have hands-on experience with modern React development and pure JavaScript frontends – including developing custom shop plugins for platforms like Shopify and WooCommerce.

  • You are skilled in designing scalable microservices and secure RESTful APIs and have a deep understanding of web security standards like OAuth2 and OIDC.

  • You bring practical experience with the AWS ecosystem, particularly with Lambda and ECS, and have experience delivering cloud-native applications in containerized environments.

  • You are confident using Infrastructure as Code tools such as Terraform and value automation, performance, and maintainable DevOps processes.

  • You are comfortable working with NoSQL databases like DynamoDB and have practical SQL skills for structured data.

  • You thrive in a collaborative environment, bring a growth mindset, embrace continuous learning, and are motivated to make a meaningful contribution with your team.

  • You have strong communication skills in English (both written and spoken); additional language skills are a plus.

What we offer:

  • Hybrid Work: Combine flexible remote work with team days in the office

  • Workation: Temporarily work from a location of your choice within the EU, Iceland, Liechtenstein, or Norway

  • Permanent Employment at Europe’s trusted brand

  • One “Self Education Day” per month

  • 27 vacation days + 3.5 additional days off at Christmas, New Year’s Eve, and Carnival

  • Buddy Program (an experienced colleague will support your onboarding)

  • Individual development opportunities and internal learning programs

  • Events (team events, unit events, etc.)

  • Health Pass – free online and offline sports, fitness, and health courses