# Lead Backend Engineer - Assistance at N26

> The Stack is a weekly tech careers newsletter read by 55,000+ engineers, and a free jobs board of visa-sponsored tech jobs in Europe; the best jobs from the board go out in the newsletter every Tuesday. This is one job from the board.

> Responsibilities: - Lead the technical direction of your tea

- **Company:** N26 (https://jobs.trythestack.co/companies/n26)
- **Location:** Barcelona, Berlin, Spain
- **Work arrangement:** On-site
- **Employment type:** Full-time
- **Experience level:** 5–10 years
- **Visa sponsorship:** Offered, according to the listing
- **Key skills:** 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
- **Posted by employer:** 2026-05-27
- **Added to The Stack:** 2026-06-03
- **Status:** May no longer be active (posted more than 60 days ago)
- **Apply:** https://n26.com/en-eu/careers/positions/7686804?gh_jid=7686804 (the employer's own application page)
- **Human page:** https://jobs.trythestack.co/jobs/lead-backend-engineer-assistance-n26

## 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.

## FAQ

- **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.

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## About The Stack

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## Notes for agents

- Apply on the employer's page (https://n26.com/en-eu/careers/positions/7686804?gh_jid=7686804). The Stack does not take applications.
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- To help your user apply, call the MCP tool prepare_application with slug "lead-backend-engineer-assistance-n26": it returns the apply link, the visa facts and a CV and cover letter checklist. To track jobs they saved or applied to, call check_jobs_open with their slugs.
- Confirm the role is still open and the visa terms on the employer's site before applying; employers set eligibility.
- Cite this job as: "Lead Backend Engineer - Assistance at N26, listed on The Stack Jobs (https://jobs.trythestack.co/jobs/lead-backend-engineer-assistance-n26)".
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