Senior .NET Backend Engineer

About the role

We are on a mission to contribute to a zero-waste future by drastically reducing food waste, fuel consumption, costs, and CO₂ emissions in the airline industry. Every role in our company is a direct contributor to this vision – and as a Senior .NET Backend Engineer, you’ll be at the heart of the team that makes it possible.

You will report to our Backend Tech Lead and collaborate closely across multiple teams to help design and build scalable backend systems and APIs that power data‑driven decision‑making across airlines worldwide. Your work will focus on creating robust, high‑performance solutions that evolve with our growing platform, while ensuring features are implemented reliably and delivered with exceptional quality.

Through your contribution, you’ll help us deliver technology that not only scales efficiently but also advances our mission of making air travel more sustainable and resource‑efficient.

Key responsibilities

• Design, develop, and maintain scalable backend systems and APIs.
• Oversee projects from conceptualization and design through development, testing, implementation, and ongoing maintenance.
• Collaborate with cross‑functional teams (e.g., front‑end developers, product managers) to gather requirements and translate them into effective technical solutions.
• Provide technical guidance to teammates within the backend team.
• Lead code review processes to ensure adherence to best practices and maintain high‑quality code standards.
• Foster a collaborative environment that encourages continuous learning and improvement.
• Follow best practices for automated testing, deployment, and monitoring to enhance system stability.
• Document technical designs, code changes, and system architecture for ongoing reference and compliance.
• Troubleshoot and resolve complex technical issues in a timely manner, minimizing downtime and disruption.
• Take part in on‑call rotation.

Key competencies

• 5+ years of professional experience in backend software development, 3+ years of experience in .NET (C#, ASP.NET Core, Entity Framework Core).
• Proven experience in designing and developing scalable APIs.
• Proficiency in SQL databases (e.g., SQL Server).
• Strong background in unit testing, integration testing, and automated test frameworks.
• Deep understanding of security best practices, authentication, and authorization.
• Strong communication skills for effective cross‑functional collaboration with product managers, designers, and front‑end engineers.
• Ability to proactively identify and address performance bottlenecks.

Nice‑to‑have

• Strong understanding of software architecture principles.
• Familiarity with containerization (Docker).
• Experience with CI/CD pipelines (Azure DevOps, GitHub Actions, etc.) and infrastructure as code (e.g., Terraform).
• Understanding of cloud platforms such as Azure, including deployment, monitoring, and cost optimization.

Language

• Minimum English proficiency: C1

Expected travel needs

• 2 annual one‑week team events

Our tech stack

• C# (.NET 8–10), ASP.NET Core, Entity Framework Core
• Microsoft SQL Server, Azure Blob Storage
• Azure App Services & Functions, Docker
• Azure Service Bus, Terraform
• GitHub Actions, SonarQube, extensive unit & integration tests

Hiring process

• Recruiter screen (45 minutes)
• Interview with hiring manager (30 minutes)
• Technical interview (60 minutes)
• Discussion with founder(s) and peer(s)

Equal opportunity statement

LimeFlight is proud to be an equal opportunity employer. We are committed to creating an inclusive environment where everyone, regardless of race, ethnicity, gender identity or expression, sexual orientation, age, disability, religion, or background, can thrive and do their best work.