Senior Software Engineer - Backend (m|w|d)

United States Digital Space LLC; Berlin; Vor Ort; EUR 90.000 - 120.000; Vollzeit

Benefits dieser Stelle

Free breakfast at office

Free lunch (vegan/vegetarian)

Free coffee and beverages

Rooftop terrace with city view

Fitness options: Urban Sports/Gympass

Company events and team activities

Zusammenfassung

idealo is seeking a Senior Software Engineer to own the backend for its mobile app platform. You will build and operate cloud-native services in AWS, design REST/GraphQL APIs, and drive scalability and reliability with a focus on modern microservices architectures.

You will collaborate with mobile and backend teams, contribute to architecture decisions, and help advance CI/CD practices while maintaining high quality and performance.

Qualifikationen

• Several years of backend development experience, ideally ≥5 years with Kotlin/Java.
• Experience with cloud architectures, especially AWS.
• Experience with Infrastructure-as-Code (Terraform) and container technologies (Kubernetes).
• Experience in designing and operating APIs (RESTful and GraphQL).
• Knowledge of modern software architectures (microservices).
• Experience with databases (NoSQL, and relational).
• Fluent English skills.

Aufgaben

• Develop and operate business and web services in the AWS Cloud.
• Own the entire lifecycle of services: architecture, infrastructure, development, testing, deployment, monitoring, and maintenance.
• Design and develop REST/GraphQL APIs for mobile apps (Android & iOS).
• Ensure services are scalable and performant under high load.

Kenntnisse

Backend development

Kotlin/Java

AWS

APIs REST/GraphQL

Microservices

NoSQL relational databases

English proficiency

Tools

Terraform

Kubernetes

CI/CD

Jobbeschreibung

As a Senior Software Engineer for our mobile app backend at idealo, you will drive the further development of our award-winning e-commerce apps. We enable millions of users to compare prices and make better purchasing decisions on their mobile devices. We are a fully integrated, autonomous team within the product development of our mobile apps, balancing proven technologies with innovative experiments to deliver outstanding user experiences and contribute to idealo’s mission. We take full responsibility for the operation, technical implementation, and direction of our services—and we’re looking for strong support to keep growing.

About your new role End-to-End Ownership

• You develop and operate business and web services in the AWS Cloud.
• Together with your team, you are responsible for the entire lifecycle of your services (YBYO): architecture, infrastructure, development, testing, security, deployment, monitoring, on-call, and maintenance.
• You design and develop APIs (REST/GraphQL) for our mobile apps (Android & iOS).
• You ensure that our services are scalable, stable, and performant—even under high load (e.g., peak events).

Technical Excellence

• You make architectural decisions for modern backend systems (e.g., microservices).
• You further develop our cloud infrastructure (e.g., using Terraform and Kubernetes).
• You ensure high software quality through testing, code reviews, and monitoring.
• You identify technical debt and drive its reduction.
• You introduce new technologies and tools and continuously improve our development processes (e.g., CI/CD, automation, AI tools).

Collaboration & Impact

• You work closely with mobile engineers (iOS & Android) as well as backend colleagues.
• You actively contribute to technical discussions and challenge existing solutions.
• You share your knowledge within the team (e.g., through pair programming, code reviews, or tech talks).
• You explain complex technical topics in a clear and understandable way, even for non-technical stakeholders.
• You take responsibility within the team, e.g., in on-call rotations or during critical situations.

Skills & Requirements

Several years of experience in backend development (ideally ≥5 years with Kotlin/Java).

• Experience with cloud architectures, especially AWS.
• Experience with Infrastructure-as-Code (e.g., Terraform) and container technologies (e.g., Kubernetes).
• Experience in designing and operating APIs (RESTful and/or GraphQL).
• Knowledge of modern software architectures (e.g., microservices).
• Experience working with databases (NoSQL, ideally also relational).
• Fluent English skills.

Nice-to-have

• Experience with high-performance backends for mobile apps.
• Experience using AI tools in daily development work.
• Good German skills.

At idealo you can expect

You want to further your education? We take your personal development goals seriously and, in addition to our idealo Learning Hub, eLearning offerings (e.g., Udemy), coaching & mediation, we also offer you the opportunity to benefit individually from additional learning and development budget.

• And what about the office? Our office in the heart of Berlin offers free organic breakfast, excellent free lunch (vegan and vegetarian), as well as free coffee, lemonades and after-work beer, in addition to the "standard foosball". It also has a fabulous rooftop terrace with view of the whole of berlin where you can network with colleagues from our group of companies.
• In need of additional support in any areas of your life? We offer free counseling and support in all areas of life (professional, private, family, health, etc.) in cooperation with the pme-Familienservice.
• You want full flexibility on your way to work and beyond? No problem with a job bike or Deutschlandticket- and it's environmentally friendly, too!
• Want to keep yourself fit? We offer many different fitness and sports options, such as an Urban Sports or Gympass membership, to suit your personal needs.
• And what else is there? Of course, success must be celebrated! In addition to team events, you can also expect big company events and other moments of organized connection with others in the company and your team throughout the year!