Senior Software Engineer

ABOUT THE COMPANY:

OAG is a leading data platform for the global travel industry offering an industry - first single source for supply, demand, and pricing data.  

We empower the global travel industry with high-quality, relevant datasets covering the whole journey from planning to customer experience.  

Headquartered in the UK, with operations in the USA, Denmark, France, Germany, Singapore, Japan, China, and Lithuania. For more information visit www.oag.com
ABOUT THE TEAM:

You’ll join a team of 5 engineers based in Vilnius, building and evolving a highly scalable, cloud-native platform that underpins all of our web crawling and other capabilities. The team owns a complex, multi-component system running fully in AWS cloud, including an in-house framework developed internally and a large-scale identity management platform.

The systems are designed to operate at significant scale, supporting thousands of crawler instances running concurrently and processing up to billions of data points every month. The team focuses heavily on system design, optimisation, and scalability, and is currently working on redesigning the system and building core components from scratch to support both internal users and external integrations. This is an engineering-led team with strong ownership over architecture, performance, and long-term platform evolution.

YOU WILL:

• Design, develop, and maintain scalable backend services using cloud-native and serverless patterns
• Build and operate event-driven and message-based systems to handle high-throughput data flows
• Develop containerised services
• Work with data platforms using SQL, supporting ingestion, transformation, and delivery use cases
• Own services in production, including deployment, monitoring, observability, and reliability
• Contribute to architectural discussions and help shape technical direction and best practices
• Identify and address technical debt, performance issues, and operational risks
• Collaborate closely with other engineers, sharing knowledge and raising engineering standards

ESSENTIAL:

• Several years’ experience building and operating production backend systems
• Strong experience with C# / .NET
• Solid SQL skills and experience working with relational or analytical databases
• Hands-on experience with cloud platforms (AWS preferred, others welcome)
• Experience designing or working with distributed or event-driven systems
• Experience with CI/CD pipelines and modern development workflows
• Strong understanding of clean code, testing, and software engineering best practices
• Comfortable working in Agile teams (Scrum, Kanban, or similar)
• Fluent in English.

DESIRABLE:

• Experience with Terraform or infrastructure-as-code tools
• Familiarity with  Snowflake, Databricks, or modern data platforms
• Experience with monitoring and observability tools
• Interest in data-intensive or analytics-driven products.
  

WE WILL OFFER YOU: 

• Opportunity to work with passionate individuals at the intersection of technology and the global travel industry.
• Company-provided free lunch every day.
• A modern office in a convenient location, with flexible working arrangements that allow remote work or office attendance.
  
• An attractive compensation and benefits package, including private health insurance and company bonus scheme.
• Voluntary participation in a company-supported retirement scheme
• A generous annual leave policy that grows with each year of service, plus a day off during your birthday month.
  
• Work remotely from anywhere in the world for 1 month each year.

We will ensure that the exact salary offered to you will be based on your qualifications, competencies, professional experience, and requirements for the corresponding job function (starting from 4200 EUR gross per month).