Fullstack Developer (.NET)

September 30, 2026

Hybrid

Senior

Sintra

Worth knowing

Mandatory office attendance
2 days per week
English is required
B2 level

Description

Nextlane is a technology company digitizing the automotive customer journey for manufacturers and dealerships. They are looking for a Fullstack Developer to own design, development and delivery of complex features across their applications using .NET and React/Next. The role includes driving architectural decisions, mentoring engineers and acting as a technical leader within the team.

Responsibilities

Own the design, development and delivery of complex features and systems across applications
Build scalable, maintainable and high-quality solutions using .Net and React/Next
Drive technical decisions balancing business needs, delivery timelines, performance and long-term maintainability
Contribute to the evolution of backend and frontend architecture, development practices and engineering standards
Collaborate closely with Product, Design and Engineering teams to deliver outstanding user experiences
Lead complex functionalities and ensure applications remain reliable, secure and performant
Define and improve testing, release and quality practices for safe and predictable delivery
Identify technical risks early and propose solutions that reduce complexity
Lead refactoring and modernization initiatives that improve the health of the codebase
Mentor other engineers through technical guidance, code reviews and knowledge sharing
Act as a technical leader within the team, driving engineering excellence

Requirements

Experience: 6-8+ years
English B2/C1 for work communication
Strong communication skills, verbal and written, to influence technical decisions
Strong software engineering fundamentals: architecture, design patterns, testing and system design
Ability to deliver complex features with high ownership and autonomy
Experience making architectural decisions and evaluating technical trade-offs
Strong problem-solving skills and ability to navigate ambiguity in complex systems
Quality-focused mindset with experience improving engineering practices
Experience mentoring engineers and collaborating in cross-functional teams
Strong professional experience developing backend services with .Net
Good experience developing frontend applications on React/Next
Proven experience building, maintaining and scaling production applications
Understanding of code architecture, design patterns, state management, asynchronous programming and performance optimization, clean architecture and SOLID principles
Experience designing and implementing automated testing strategies including unit, integration and UI tests
Strong experience with CI/CD pipelines, automated deployments and mobile release processes
Understanding of software engineering best practices: code quality, maintainability, security and observability
Experience working with Git-based development workflows
Familiarity with analytics, performance monitoring and feature flagging solutions

Conditions

Hybrid work: rotational model, 2 days onsite, three days remote
Annual payments: 14 payments per year (12 monthly payments plus a summer bonus and a Christmas bonus in November)
Meal voucher: €10.20 per working day
Vacation: 23 vacation days, plus 24th or 31st December off
Language training: group classes in Spanish, English or French
Private medical insurance: Multicare coverage
Teambuilding: afterworks and team activities

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