Senior Python Engineer

Bonapolia; Warszawa; Remote; PLN 240,000 - 360,000; Full time

Job summary

Bonapolia is seeking a Senior Python Engineer to join its BI Analytics team. You will build features from prototype to production, develop AI agents and data services, and integrate with data sources and internal systems in a CET, full-time engagement.

The role requires 4+ years of Python backend development, strong SQL and cloud DWH experience (BigQuery preferred), and hands-on work with LLMs, tools, and CI/CD. Russian language is a must for collaboration across teams.

Qualifications

• 4+ years of commercial Python backend development.
• Production experience with LLM agents, tool use, MCP, evaluations, and LLM APIs or agent frameworks.
• Strong SQL and cloud DWH experience, preferably BigQuery.
• OAuth, IAM, Docker, and CI/CD.
• Daily use of coding agents and ability to review their output.

Responsibilities

• Build product features from prototype to production.
• Develop AI agents and web services for internal analytics use cases.
• Integrate agents with data sources and internal systems.
• Set up user access, authorization, cloud deployment, and service maintenance.
• Build evaluations and monitoring for LLM components.
• Fix defects and improve solutions based on user feedback.

Skills

Python backend development

LLM agents experience

SQL

Cloud DWH BigQuery

OAuth IAM Docker CI/CD

Code review of agent outputs

Russian language

Tools

Docker

CI/CD

BigQuery

Claude Agent SDK

Anthropic API

Strands Agents

Job description

We are looking for a Senior Python Engineer

Language Proficiency: Upper-Intermediate

Employment type: Full time

Candidate Location: Poland, other EU countries, Kazakhstan, Serbia, Armenia, Georgia

Working Time Zone: CET

Start: asap

Planned Work Duration: 4 months with possible prolongation

Customer Description:

A global mobility and urban services platform enabling users to book rides and other services while negotiating fares directly with service providers.

Project Description:

The BI Analytics team develops internal analytics products powered by LLM agents.The initial scope includes a natural-language data assistant and a service for generating management presentations with AI-driven insights.

Project Phase:

Ongoing

Soft Skills:

• Proactive approach
• Ability to work independently

Hard Skills / Must Have:

• Russian language is a must
• 4+ years of commercial Python backend development
• Production experience with LLM agents, tool use, MCP, evaluations, and LLM APIs or agent frameworks
• Strong SQL and cloud DWH experience, preferably BigQuery
• OAuth, IAM, Docker, and CI/CD
• Daily use of coding agents and ability to review their output

Hard Skills / Nice to Have:

• BigQuery and GCP
• Claude Agent SDK, Anthropic API, or Strands Agents
• React

Responsibilities and Tasks:

• Build product features from prototype to production
• Develop AI agents and web services for internal analytics use cases
• Integrate agents with data sources and internal systems
• Set up user access, authorization, cloud deployment, and service maintenance
• Build evaluations and monitoring for LLM components
• Fix defects and improve solutions based on user feedback

Technology Stack:

Python, Strong SQL, experience with a cloud DWH (BigQuery preferred), Docker, CI/CD, AI tools

Interview stages:

• English check (15 minutes)
• internal technical interview (1-1,5 hour)
• client interview (1 hour)
• client interview – cultural fit (45 minutes)

What we offer

• Model: B2B contract with Bonapolia - one contract, one monthly invoice
• Rate: negotiated per candidate seniority and client budget
• Payment: monthly invoice, paid on the same schedule the client pays us (60 days)
• Contract written under your country's law
• We handle the client-side paperwork: MSA, NDA, invoicing

About Bonapolia

Bonapolia is a family-owned IT staff augmentation team based in Lisbon. We build engineering teams for product companies and IT consultancies across Europe and the US.

More at bonapolia.com