Senior Backend Engineer, AdTech

About the role: As Senior Backend Engineer, AdTech (m/f/d), you will be shaping and evolving our AdTech platform and operating backend services that power advertising products across sponsored search, sponsored products, campaign management, ad serving, targeting, reporting, and measurement with a strong focus on scalable architecture, engineering best practices, and performance optimization. You will serve as the technical leader across cross-functional teams and ensure the successful delivery of high-performance advertising solutions. You will collaborate closely with theProduct Managers, Retail Media business team and other stakeholders to turn complex business challenges into robust technical solutions that enable our Retail Media ecosystem to grow and scale.

About our tech stack: Node.js, TypeScript, Koa.js (primary) + NestJS, MongoDB (incl. aggregation pipelines), Redis, BullMQ, RabbitMQ, Algolia, Docker, Kubernetes (GKE), CI/CD (CircleCI + ArgoCD), Google Cloud. Integrations with ad-serving platforms. React/Next.js on the frontend.

About your tasks:

• Design, develop, and maintain scalable backend services and APIs supporting retail media products.
• Build and operate distributed systems that process large volumes of advertising, campaign, auction, and analytics data.
• Develop low-latency, highly available services for ad serving, targeting, bidding, and campaign execution.
• Optimize real-time and high-throughput data systems, integrating with MongoDB, Redis, and Algolia to support fast ad delivery and campaign insights. Work with BullMQ and RabbitMQ for reliable message queueing across distributed services.
• Ensure software quality through automated tests (TDD/BDD preferred).
• Design and implement distributed caching strategies, cache invalidation mechanisms, and performance optimizations.
• Ensure systems meet reliability, performance, scalability, and security requirements.

Do you have experience in Redis?, * You have experience building products in Retail Media, AdTech, MarTech, E-commerce, Search, or Recommendation systems.

• You demonstrate seniority through ownership, technical excellence, proactive problem-solving, and the ability to independently drive initiatives from concept to production.
• You have hands-on experience building Ad Serving Platforms, Campaign Management Systems, Search Advertising Solutions, Auction or Bidding Systems, Attribution and Reporting Platforms.
• You posses strong software engineering principles Object-Oriented Design, SOLID Principles, Design Patterns, Testing Strategies, API Design.
• You have experience building and operating cloud-native applications on AWS, GCP, or Azure.
• You have practical experience with Infrastructure as Code (IaC), CI/CD pipelines, and automated deployment practices.
• You are well-versed in security best practices, including authentication and authorization (OAuth2, JWT), encryption, secrets management, and secure software development practices.
• You understand the importance of observability and have experience working with monitoring, logging, tracing, and alerting solutions.
• You bring a strong DevOps mindset and take ownership of software throughout its lifecycle, from development and deployment to operation and continuous improvement.

Hi, we’re Redcare Pharmacy. Before anything else, we put the health of our customers and employees first. 

We believe that we can only move forward if we create a healthy working environment that promotes personal and shared growth. Because without one, we simply wouldn’t be able to thrive. 

With passion, pioneering spirit and the most innovative tools, our international teams work continuously on our brands, products and services. We’re Europe’s No.1 one-stop pharmacy – and we want to keep it that way. Why not join us?

Start your #Redcareer at Europe's largest online pharmacy now.