Software Engineer

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Description

Rate: 90 – 120 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, LiteLLM, Kafka Apply AI to your engineering practice — use and help improve our internal AI tooling to ship faster and raise quality Instrument and monitor services (Datadog, event forwarding, alerting) and respond to production issues About You 2–4 years building production software Strong in Python (FastAP

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