Lead Backend Engineer - Assistance at N26

✨ The Stack take on this N26 job

• 🏢 N26 has 139 jobs here, 136 with visa sponsorship see all
• 🛂 Visa: Highly Qualified Professional permit. Education: Higher education degree guide
• 💡 No salary shown. Ask N26 if it is above the minimum.

Updated 2026-11-05, from our data and official sources.

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About the role

Responsibilities:
- Lead the technical direction of your team: define and manage technical roadmaps with Product and Engineering Managers, prioritize dependencies, and minimise technical debt.
- Architect, build and operate high-availability, high-performance microservices using Java/Kotlin and Spring Boot.
- Drive engineering quality: promote clean code, TDD/BDD, CI/CD, observability and regular production deployments.
- Integrate AI and automation into back-office workflows, implementing model and tool integrations to improve operational productivity.
- Monitor and optimise distributed systems for scalability, reliability and performance.
- Mentor engineers, run code reviews, produce documentation, share knowledge and contribute to hiring and employer brand efforts.

Requirements:
- 5+ years building complex distributed backend systems using Java and/or Kotlin (Spring Boot) in production environments.
- Strong system design skills: OOP, DDD, hexagonal architecture, event-driven and microservices patterns.
- Proven experience designing REST APIs and working with PostgreSQL for performance and scalability.
- Practical DevOps mindset: CI/CD pipelines, observability, and experience with AWS and/or Kubernetes.
- Solid engineering practices: Clean Code, TDD/BDD, testing and maintainable codebases.
- Experience using AI coding assistants responsibly (e.g., GitHub Copilot, Claude/Gemini) to accelerate delivery while maintaining code quality.
- Demonstrated leadership, mentoring and cross-functional collaboration skills.

Responsibilities

Lead the design and development of high-availability backend applications for internal operations using a microservice architecture. Mentor engineers, manage technical roadmaps, and integrate AI automation to improve back-office efficiency.

Requirements

Requires 5+ years of experience with Java/Kotlin and Spring Boot, along with expertise in distributed systems and API design. Candidates must demonstrate leadership skills and proficiency in using AI coding agents for development.

Key skills

• Java — in 360 other listings on The Stack
• Kotlin — in 251 other listings on The Stack
• Spring Boot — in 147 other listings on The Stack
• Microservices — in 236 other listings on The Stack
• Distributed Systems — in 342 other listings on The Stack
• DDD — in 18 other listings on The Stack
• Hexagonal Architecture — in 1 other listing on The Stack
• Event-Driven Architecture — in 60 other listings on The Stack
• Clean Code
• TDD/BDD
• PostgreSQL
• AWS
• Kubernetes
• REST API Design
• Generative AI
• Leadership

On The Stack (as of 2026-11-05)

• N26 has 138 other listings on The Stack, 135 of them marked as offering visa sponsorship.
• 76 visa-sponsored jobs in Spain on The Stack, posted in the last 60 days.
• 68 visa-sponsored backend engineer jobs in Europe on The Stack, posted in the last 60 days.

Frequently asked questions about N26

Is this Lead Backend Engineer - Assistance role still open?

It was posted on 2026-05-27. Listings more than 30 days old may no longer be active, so check N26's site before applying.

Does N26 offer visa sponsorship?

This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on N26's site.

Where is this role located?

The listing gives the location as Barcelona, Berlin, Spain. It is marked on-site.

What skills does this role ask for?

The listing names: Java, Kotlin, Spring Boot, Microservices, Distributed Systems, DDD, Hexagonal Architecture, Event-Driven Architecture, Clean Code, TDD/BDD, PostgreSQL, AWS, Kubernetes, REST API Design, Generative AI, Leadership.