Senior Backend Python Developer

Please note: This role requires working from our office in Warsaw city centre 5 days a week. This is a fully on-site position, and remote or hybrid work is not available.About UsMany companies want to use AI agents, but these agents often struggle with real business tasks. We solve this problem by building a platform that helps AI understand business rules, workflows, and processes.

This allows AI to make better decisions and provide accurate, reliable, and compliant results.Well-known companies from different industries use our technology to automate up to 85% of customer cases, reduce handling time by 20–25%, and complete tasks that used to take hours in just seconds. We also work with leading technology partners and have been recognized for our innovative approach.Our goal is to help people everywhere get better answers through AI.Job DescriptionWe are looking for a Senior Backend Engineer who can take ownership of important systems instead of only completing assigned tasks. You will solve complex problems, design backend solutions, build them, and make sure they run well in production.We want someone with strong technical skills, good communication, and the ability to create simple, reliable, and easy-to-maintain systems.This is a product engineering role with responsibility from system design to production.

The position is based in Warsaw and requires office work.ResponsibilitiesDesign and develop backend services, APIs, data processing, and background tasks for production systems.Turn unclear business needs into clear technical plans and practical solutions.Maintain services after release by improving reliability, monitoring, performance, and fixing issues.Make good decisions about system architecture, data models, interfaces, and future scaling.Write technical documentation, architecture notes, and diagrams when they help the team.Work closely with product managers, frontend engineers, and platform engineers to deliver complete solutions.Improve development processes using AI tools, automation, and internal workflows.Support the team through code reviews, design reviews, and practical technical leadership.RequirementsStrong experience as a senior backend engineer working on production systems.Excellent Python skills and the ability to write clean and maintainable code.Good understanding of distributed systems, including concurrency, failure handling, data consistency, asynchronous processing, and service design.Experience with cloud platforms such as AWS, Azure, or similar services.Knowledge of SQL, NoSQL databases, schema design, and performance optimization.Ability to take a project from an idea through design and implementation to production.Strong written and spoken communication skills with the ability to explain technical topics clearly.Regular use of AI tools in everyday development and interest in improving AI-based workflows.Nice to HaveExperience with LLM-based applications, search systems, AI infrastructure, or large data pipelines.Knowledge of TypeScript or the ability to contribute to frontend development when needed.Experience guiding other engineers and influencing technical decisions without being a formal manager.What We OfferB2B contract and company stock options.MacBook Pro for work.Modern technology stack and opportunities to contribute to open-source projects.Access to advanced AI development tools, including GitHub Copilot, Claude Code, OpenAI Codex, TypingMind, and MCP servers.Our Culture and ValuesOur leadership team has strong experience in AI and knowledge management. We have secured more than $60 million in funding and achieved three years of continuous 3x growth.Our work is based on these values:Quality – We aim for excellent work and high coding standards.Momentum – We take initiative and keep projects moving forward.Accountability – We take responsibility and give honest, respectful feedback.Hard Work – We believe great results come from teamwork and consistent effort.Learning Agility – We stay curious, learn from mistakes, and improve every day.Adapt and Thrive – We accept change and see challenges as opportunities.Win Together – We succeed as one team through honesty, openness, and support for our shared mission.