Mid/Senior Backend Developer - Retail Media Platforms

O firmie: - We are a joint venture between OBI and Reply Group, responsible for co-designing, building and operating mission-critical digital platforms for commerce, customer service, and omnichannel retail. - OUR MISSION: - "We unite technology leadership with deep retail vision to implement standardized processes and scalable digital products that drive efficient support for one of Europe’s largest DIY retailers. Leveraging proven best practices, we advance the internationalization of products and the digital mindset of our partners, delivering consistent and business-critical solutions to support the targets of our customer." Zakres obowiązków: - Design, build, and maintain backend services using NestJS, NodeJS, and TypeScript. - Architect and scale headless advertising platforms and backend services for online marketing and retail media use cases. - Contribute to the architecture and scaling of distributed, cloud native systems running on AWS and Kubernetes. - Collaborate closely with DevOps teams to manage infrastructure using Terraform, Helm, and GitLab CI/CD. - Implement and operate event driven and streaming solutions using Kafka. - Ensure high availability, performance, and reliability through strong observability practices. - Use Grafana, Loki, and Thanos to monitor systems, analyze logs, and support incident response. - Actively participate in code reviews, architectural discussions, and technical decision making. - Contribute to continuous improvement initiatives across performance, scalability, security, and operational excellence. - Support and evolve large scale publisher platforms, multi-tenant content management systems, and advertising platforms. Oferujemy: - Motivizer Benefits Platform to choose and manage all your benefits in one place. You receive a budget (550 PLN monthly). You can choose medical care package, meal tickets, sports cards (we have Multisport and on preferential terms, we have membership cards to one of the most popular Gyms), cinema tickets, shop vouchers, discounts and many more. - Language Courses – you'll have access to a multi-language learning platform enabling you to practice you language skills and learn new ones! - Regular and systematic further training opportunities - both internally and from external providers. We support your ongoing learning and development. - Cooperation within an internal community is our everyday reality. We have networking events, coding challenges, and company parties for different occasions.