Senior Software Engineer (Routing & Optimization)

Trafi (an Enghouse Company) offers a scalable and comprehensive MaaS (Mobility as a Service) platform designed to integrate complex transport networks into a single, user-centric application. The company’s white-label product enables cities and public transport authorities to connect various mobility options. These include public transport, car rental, taxi and micromobility (bicycles, scooters, etc.), integrated into a unified, truly multi-modal journey planning platform. Trafi’s solutions are trusted by major cities such as Berlin (Jelbi), Brussels (Floya), and Nottingham & Derby (Ride).

As a Senior Software Engineer on the Journey Planning team, you'll work on one of the most technically challenging parts of our platform: calculating optimal journeys across complex transportation networks in real time. Every route request requires combining and reasoning over large-scale datasets, including public transit schedules, real-time vehicle positions, road networks, shared mobility services, and geospatial information.

You'll design and implement the algorithms and systems that determine how users get from point A to point B efficiently and reliably. This role is ideal for engineers who enjoy deep technical challenges, algorithmic thinking, and performance-critical systems, spanning graph traversal, route optimization, real-time search, distributed data processing, and translating research or industry approaches into production-grade solutions.

This is a Hybrid role based in our Vilnius office, offering the flexibility to work from home or the office according to your preference. In this position, you will report to the Team Lead, Software Engineer.

Responsibilities: 

• Ownership of system design, implementation and support 
• Write high-quality C# code on the latest .NET stack 
• Run .NET on Linux in container cluster (docker) 
• Use Infrastructure as a Code to manage cloud infrastructure (terraform.io) 
• Design distributed (micro)service architecture which processes data in real time 
• Work extensively with Amazon Web Services infrastructure (we use 30+ AWS services) 
• Mentoring less experienced colleagues 
• Instrument and monitor code 

Check-out our tech stack here: https://stackshare.io/trafi/trafi

Qualification and Experience: 

• 5+ years of professional software engineering experience, including strong experience with C# and API development
• Proven experience designing fault-tolerant, production-ready, and cost-efficient systems in cloud environments
• Strong foundations in algorithms, data structures, and problem-solving
• Ability to reason about trade-offs between performance, scalability, accuracy, and operational cost.
• Experience working on performance-critical systems, distributed systems, real-time processing, or large-scale data pipelines is highly valued
• Comfortable working in a dynamic environment with evolving objectives and close collaboration across teams
• Curiosity to explore technical research, industry best practices, and non-trivial engineering challenges
• Strong communication skills and professional proficiency in English
  

Salary: 

The salary range for this position is 5,500 – 6,666 EUR gross per month (66,000 – 80,000 EUR gross per year).

What we offer:

• Work Your Way. Enjoy the flexibility to work remotely. Our office is located in
  Vilnius when you want to drop by
  and say hi! 
• Talented Colleagues. Collaborate with colleagues who are experts in their fields, fostering an environment of learning and growth. 
• Health Benefits. We've got your well-being covered with medical insurance, ensuring you're in great shape. Additionally, you can personalize your wellness options using Stebby. 
• Convenient Commuting. Take your pick between parking options or a monthly allowance for the Trafi app, so you can get to work without stress. 
• Secure Your Future. Thinking ahead? We offer the option to allocate a part of your salary to a pension fund for your stable future. 

About Us:

In April 2025, Trafi was acquired by Enghouse, a global enterprise software company listed on the Toronto Stock Exchange (TSX: ENGH). With this acquisition, Trafi continues to scale its impact, delivering white-label platforms that help cities reduce emissions, simplify urban mobility, and reclaim their streets through fully integrated, multi-modal transport solutions.  
You can be confident that our recruitment and hiring processes will be adjusted to accommodate disabilities if requested. Enghouse is an equal opportunity employer. We’re grateful to everyone who applies. All applicants will receive a status update, and those selected for interviews will be invited to the next stage. 

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