Senior Fullstack Engineer (f/m/d) – Human & Agentic Trust

Trusted Shops develops SaaS solutions for over 40 million users and 30,000 businesses across Europe. Our product suite includes products such as the Trustmark, Buyer Protection and the eTrusted experience feedback platform. Our products are part of a 25-year mission to enable trust between people and businesses in the digital age.

Home of our Product Development is the Products & Engineering Department, which consists of 15 cross-functional Product Teams across 3 Product Domains (Consumer, Business and Platform), working in an agile environment. Here we’re building the next generation of secure and user-friendly authentication tools for agentic commerce - designed to foster trust between users, businesses and agents.

To join our Trstd Login Team, we are looking for a:

Senior Fullstack Engineer (f/m/d)

Cologne (hybrid) or Berlin (remote) | Permanent Contract (Full-time)

Your Key Responsibilities as a Senior Fullstack Engineer (f/m/d):

• Work in a cross‑functional Product Team to design, build, and evolve secure, scalable identity and authentication services.

• Develop cross‑platform Web Components and their integration into major eCommerce systems (Shopware, PrestaShop, WooCommerce, Magento, Shopify).

• Implement secure System Communication using OAuth2 and OIDC, following a language‑agnostic engineering mindset.

• Take full ownership in a “You build it, you own it” culture.

• Build and maintain infrastructure using Terraform and AWS services such as Lambda, ECS, API Gateway, and DynamoDB.

• Optimize reliability, security, and performance across Identity‑related components.

• Collaborate with engineers, product managers, and delivery experts to ship impactful, user‑centric features.

• Strong frontend experience with JavaScript, TypeScript, HTML, CSS.

• Experience building React applications and hands-on experience with Web Components & lightweight frameworks like Lit.

• Backend skills in Node.js with Express.

• Knowledge of Keycloak (Java), authentication flows, identity protocols.

• Hands‑on AWS knowledge (Lambda, ECS, API Gateway, DynamoDB).

• Experience with Terraform / IaC (or willingness to learn).

• Knowledge of microservice architecture, secure RESTful API design, and web security standards.

• Growth mindset, collaborative working style, strong communication skills in English.

What we offer you:

• Hybrid work: Combine flexible remote work with team time in the Cologne office (on-site days depending on your location)

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

• 28 vacation days

• 2.5 additional days off at Christmas, New Year's Eve and Carnival

• Buddy program (an experienced trustee is at your side)

• Individual learning & development opportunities (internal & external trainings, e-learnings)

• Events (Team Events, Unit Events, etc.)

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

• Permanent contract with Europe's trusted brand

BUILD A COMMUNITY OF TRUST WITH US - #cometotrust

Not sure if you are what we are looking for? Apply!
At Trusted Shops, we are interested in you as a person. Whether you fit in with us is independent of gender, nationality, ethnic and social origin, religion/belief, disability, age, sexual orientation and identity. Trusted Shops is clearly committed to diversity and against discrimination.