Software Engineer

Flix; Województwo mazowieckie; Remote; PLN 165,000 - 276,000; Full time

Job summary

Flix is seeking an experienced Software Engineer for a freelance/B2B engagement to build and scale the customer service platform across markets with a polyglot stack (Python, TypeScript, Terraform) on AWS.

You will design, implement and own backend and frontend components (FastAPI, React), manage infrastructure as code, and integrate AI tools (Bedrock, Twilio, Cognigy) while monitoring production with Datadog.

Qualifications

• 2–4 years building production software.
• Hands-on with AWS and infrastructure-as-code (Terraform).
• Solid Git workflow, CI/CD, and containerized services (Docker).
• Strong ability to navigate vague or shifting requirements — a bias for action, decision-making with incomplete info.
• Pragmatic, ships iteratively, communicates clearly.
• Curious about and comfortable with AI tooling in day-to-day development.

Responsibilities

• 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.
• 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.

Job description

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
• 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
• Hands‑on with AWS and infrastructure-as-code (Terraform)
• Solid Git workflow, CI/CD, and containerized services (Docker)
• Strong ability to navigate vague or shifting requirements — a bias for action, comfort making decisions with incomplete information, and the judgment to avoid analysis‑paralysis
• Pragmatic, ships iteratively, communicates clearly
• Curious about and comfortable working with AI tooling in day‑to‑day development

Preferred Skills:

• Experience building products from scratch (0→1) in a fast‑moving team
• Conversational AI / chatbot / IVR experience (Twilio, Cognigy, DialogFlow)
• LLM / GenAI integration (Bedrock, RAG, MCP servers)
• Event streaming (Kafka) and observability (Datadog)
• Customer-service or contact‑center domain exposure
• 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

At Flix, we are committed to fostering diversity and inclusion. To support this initiative, we invite all applicants to complete our demographic questions on voluntary basis. Your responses will be processed as anonymized data and not linked to your profile, and thus assessed for statistical purposes and internal research.

If you prefer not to provide this information, be assured that neither the decision not to participate nor your answers will have an impact on your application, and your answers will remain anonymous and unidentifiable to you individually. The decision on your application will be made independently from your participation and the information you provide.