Software Engineer

Location: Warsaw

Department: IT & Engineering

Rate: 135 – 170 PLN/hour (B2B) 

We are looking for an experienced Software Engineer to join Flix on a freelance/service agreement basis (B2B contract). The team owns a critical product at the heart of the Flix ecosystem - optimizing how Flix coordinates with Mobility Partners to keep millions of passengers moving across the globe. 

Scope of Services

You'll have a real impact, contributing not just to code, but to product and technical decisions that directly impact the business. With your services you’ll maintain and continuously evolve a mature, stable product while simultaneously pushing it forward - tackling complex architectural challenges, reducing manual processes, and exploring AI-driven solutions.  

About the Engagement

• You’ll collaborate with a distributed, self-organized, cross-functional team
• You’ll have the opportunity to co-design new products from the ground up while continuously improving existing ones, with room to explore and implement cutting-edge technologies 
• Drive the development process in an Agile environment, placing Flix users at the center of each solution you and the team create
• Support technical decisions across teams, improving technical excellence through collaboration and lateral leadership
• Help define and deliver products that optimize the coordination between Flix and Mobility Partners, enhancing efficiency and reducing manual tasks  

About You

• 6+ years of experience as a Software Java and/or Kotlin Engineer, with knowledge of distributed systems, including Spring/Spring Boot, Kafka, MySQL/Postgres, Redis, MongoDB and S3
• Willingness to work with both Java (for existing products) and Kotlin (for new ones)
• Experience in making architectural decisions, and writing clean, performant, well-tested code 
• Autonomy and ownership in solving technical challenges, as well as strong communication skills when working with a distributed team
• A strong product mindset, with a passion for user experience and a data-driven approach to decision-making
• Experience in coding with AI
• Fluent in English (upper-intermediate or higher)

Nice-to-Haves

• Experience with DevOps and infrastructure: Kubernetes, Docker, Gitlab CI, AWS, Terraform 
• Familiarity with data engineering (ETL, Snowflake) 
• Ability to be a sparring partner, share knowledge and experience, explain complex things in plain language, consult/mentor, and provide constructive feedback  

Cooperation Model

• Cooperation based on a service agreement (B2B/freelance contract), not an employment contract
• You will operate as an independent contractor, responsible for delivering agreed services and submitting invoices
• Location: open for contractors based in Poland