Software Engineer

FlixTrain is hiring a Software Engineer in Warsaw, Poland. Level rates it ; you can apply on Level.

Level's read on this job

Level rates this software engineer role Works on AI ●●●○: the daily work is on AI products, without building the model.
The posting mentions Bedrock and RAG among its tools and skills.
Level classes it as a mid-level role.
FlixTrain has 138 other open roles on Level.
This posting went up in the last few days.

AI in this role

bedrock

rag

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 (FastAPI or similar) and comfortable in TypeScript/JavaScript (React a plus)
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

Collaboration 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

How we rate this

Software Engineer at FlixTrain rates 65 out of 100 for how much of the daily work is AI. That makes it Works on AI (AI Level 3 of 4). The level is about AI in the job, not seniority.

Classification

Works on AI. The daily work is on AI products, without building the model.

●●●● Builds AI80 to 100
●●●○ Works on AI60 to 79
●●○○ Uses AI40 to 59
●○○○ Little AI0 to 39

Levels come from how often the tools, models and workflows of the role are named in the posting itself. Open the description and count.

Key facts

Software Engineer is an open job at FlixTrain.
Level rates this role AI Level 3 of 4: Works on AI.
The role is based in Warsaw.
The job was posted on October 20, 2026.
Seniority: mid.
Applications are handled by FlixTrain. Apply on FlixTrain

Prepare for this job

Built from this posting and from similar jobs on Level.

Skills and AI tools this role asks for

RAGBedrock

Also common in software engineer jobs at this level

Java AI agents Kubernetes C++Machine learning Google Cloud

Pay

Typical software engineer job: $168k

This posting doesn't list pay. Use the typical software engineer figure when pay comes up. See software engineer jobs

Questions you could be asked

How would you design a retrieval step so the model answers from real data instead of guessing?
Walk me through how you've used Bedrock in your day-to-day work.
Describe a typical day in a role like this one: which parts run through AI directly?
If you removed AI from this role, what would be left, and how do you decide what still needs a human?

Adapt your resume

List these exact terms on your resume: RAG and Bedrock. An applicant tracking system matches the wording, not the idea.
Attach one line of real, concrete experience to at least one of them. A tool named with nothing behind it rarely survives a human read.
Show where AI is part of your daily process, not a one-off project. This role expects it to be a running habit.

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