Senior/Staff Platform Software Engineer

Nextlane; Sintra; Hybrid; EUR 70,000 - 110,000; Full time

Benefits offered by this job

Hybrid work: 2 days onsite, 3 days-?na

14 payments per year (incl. summer and

Meal voucher €10.20 per day

23 vacation days + year-end days

Language training

Private medical insurance

Teambuilding events

Job summary

Nextlane is seeking a Senior or Staff Software Engineer for the Platform team in a role focused on building a scalable integration layer that connects dealer systems with OEMs and cloud products. You will own API design, integration services, and the rollout of new capabilities with AI-assisted tooling, while ensuring security and production readiness.

You will collaborate across Platform Product, Architecture, DX, QA and Security, driving reliable, long-lived codebases across several European

Qualifications

• 8+ years in software engineering, at Senior or Staff level.
• Built and run production APIs and integrations used by other teams or partners.
• Modernised long-lived software while keeping it running.
• Experience using AI coding assistants and agents on large codebases.

Responsibilities

• Design, build and run the platform's APIs and integration services.
• Lead migrations of OEM integrations onto a new platform.
• Own production code: monitoring, on-call, fixes, and improvements.
• Collaborate with Platform Product, Architects, DX, QA, Security and product teams across Europe.

Job description

About Us

At Nextlane, we don’t just develop software solutions – we create the future of the automotive industry. We are a company that combines advanced technology with a clear vision: simplifying and digitizing every step of the automotive customer journey, empowering manufacturers and dealerships to thrive in a constantly evolving market. We believe in the value of every team member, offering opportunities for you to develop and contribute to meaningful solutions. So… What does it mean to be a #Nextlaner?

• Be part of a growth-oriented culture.
• Collaborate with colleagues from all over the world.
• Believe in the Power of ideas and the diversity of thought.
• Be committed to provide an environment where you can learn, grow, and collaborate on projects that make a global impact.

Our success is measured not just by results, but also by the growth and satisfaction of those who are part of our company.

At Nextlane, you’ll have the opportunity to innovate, push boundaries, and work on solutions that are transforming the automotive world.

About The Role

Platform is the integration layer every Nextlane product connects through: the APIs, gateways and integration services that link dealers’ management systems (DMS) with car makers (OEMs), partners and our cloud products.

As a Senior or Staff Software Engineer in Platform

As a Senior or Staff Software Engineer in Platform, you will design, build and run that layer - and help rebuild hundreds of OEM integrations on it, with AI doing much of the work under human review.

Your Mission

Make the platform something every team builds on, not around: stable and secure, one way in, and a new integration in weeks instead of months. This is a senior software engineering role first, with AI on top. You will write, review and ship code, own it in production, and make AI tools work on real, long-lived codebases - not demos. You will work with Platform Product, our architects, Developer Experience, QA, Security and the product teams that use the platform, across several European countries.

Your Responsibilities

As a key member of the team, you will be responsible for:

The integration layer

• Design, build and run the platform’s APIs and integration services, behind one front door: our API gateway.
• Build OEM and partner integrations on our new integration platform - each one a reviewed recipe, not a project of its own - and move existing ones onto it, domain by domain.
• Own what you build in production: monitoring, on-call, fixing what breaks.

Contracts and access

• Design versioned contracts for the core entities - customer and vehicle first, then workshop and parts - one shape, whatever the DMS.
• Apply one API policy - versioning, deprecation, error codes - so partners keep working when things change.
• Help build one sign-in and permission model: who may call what, for which dealer.

Stable and safe

• Add SLOs, alerts and contract tests to the top APIs; release in stages, with rollback.
• Build security in: no secrets in code, scans in every pipeline, vulnerabilities fixed on time.
• Lead incidents when needed; write the post-mortem and see its actions through.

AI In How We Build

• Make AI coding assistants and agents (Claude Code or similar) work on our codebases: repository instructions, conventions, architecture maps, tools.
• Grow our AI assembly line for integrations - design, build and test, deploy -with a person approving the contract and the release.
• Bring AI code review and AI-built tests into the pipeline, with our Developer Experience team.
• Work inside a product team when it needs it, pairing on its code, so the AI tools keep working after you move on.
• Keep AI governed and measured: what data goes where, human review of every change; adoption, lead time and change failure rate, reported honestly.

Shared knowledge and the bar

• Keep designs, runbooks and post-mortems open and AI-readable, so anyone can ask what broke last time and what fixed it.
• Review code and designs, coach engineers, write short guides.
• At Staff level: set technical direction beyond the team, with our architects; lead migrations other teams depend on; help design how AI agents use the platform safely - identities, limits, audit.

Experience

What We’re Looking For:

• 8+ years in software engineering, at Senior or Staff level.
• Built and run production APIs and integrations that other teams or partners depend on.
• Modernised long-lived software while keeping it running.
• Used AI coding assistants and agents on large, long-lived codebases, beyond demos.

Languages

• Fluent English (mandatory; interviews in English).
• French is a plus.

Technical Skills

• Strong in C#/.NET or Java.
• API and contract design - REST, versioning, backward compatibility, API gateways, OAuth2.
• Integration patterns and frameworks (Apache Camel or similar), messaging and events.
• Azure and AWS; containers and Kubernetes.
• CI/CD (GitHub Actions or similar), automated and contract testing, observability (OpenTelemetry or similar).
• LLM tooling - context engineering, agents, MCP, evaluation - and AI security: data leakage, prompt injection, secrets.

Interpersonal Skills

• Earns trust fast in a team they don’t belong to.
• Humble about what AI can’t do yet.
• At Staff level, sets direction others follow.

Communication

• Shows rather than tells.
• Clear in writing - designs, pull requests, short guides.

Nice to have

• Automotive, DMS or CRM software.
• Software installed at customer sites.
• Built developer tools or AI workflows other teams use.
• Retrieval over code and documents.
• Open-source contributions.

Our Recruitment Process

• 30-minute introductory call with our Talent Acquisition Specialist.
• Interview with the VP Engineering - Platform (hiring manager).
• Technical interview with our platform architect: pairing with AI tools on an unfamiliar codebase, and an API design discussion.
• Interview with a product team’s engineering lead.

What We Offer

We understand that flexibility and trust are essential for our teams. Here are some of the benefits we offer:

• Hybrid Work: 2 days onsite, three days remote.
• Annual Payments: 14 payments per year (12 monthly payments + 1 summer bonus + 1 Christmas bonus in November).
• Meal Voucher: €10.20 per working day.
• Vacation: 23 vacation days, plus 24th or 31st December off.
• Language Training: Access to group classes in Spanish, English, or French.
• Private Medical Insurance: Multicare coverage.
• Teambuilding: Join us for memorable afterworks and team activities!

Diversity, Inclusion & Belonging

At Nextlane, we are committed to creating a space where everyone feels valued and respected. We firmly believe that diversity in experiences and backgrounds strengthens our culture and drives innovation.

• Support for people with disabilities. If you need any adjustments during the recruitment process, let us know so we can provide the best possible experience.
• Equal opportunities for all: We welcome applications regardless of age, gender, origin, disability, or any other characteristic protected by law.

Join Nextlane and become part of the technological revolution in the automotive industry. Discover why we are a great place to develop your talent!