Software Engineer

Flix·Warsaw·Posted 20 October 2026

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About the role

Rate: 89 – 119 PLN/hour (B2B) We are looking for an experienced Software Engineer to join Flix on a freelance/service agreement basis (B2B contract) . This is a contractor engagement for a seasoned engineer who wants to work on impactful, hands-on engineering challenges. Scope of Services Build and scale the customer service platform that handles millions of passenger conversations across markets — from AI-powered chatbots and voice agents to help center and knowledge base tools. We run a polyglot stack (Python, TypeScript, Terraform) on AWS, integrating Twilio, Cognigy, Kafka and AWS Bedrock. We ship continuously and own our services end-to-end, from Terraform to production. About the Engagement Design, build and maintain Python (FastAPI) backend services and TypeScript/React frontends across the CS platform Take greenfield products from concept to production — make architectural calls, prototype, validate, and iterate under uncertainty Develop and extend Twilio Functions (JavaScript) for voice/IVR and webchat flows Manage the infrastructure as code with Terraform (HCL) on AWS — you build it & deploy it Integrate third-party and AI platforms: AWS Bedrock, Twilio, Cognigy,…

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