Senior/Staff Engineer, Backend

Kick is an applied AI company building accounting software that does the work for you. We’ve raised $20M from OpenAI Startup Fund, General Catalyst and Google Ventures to help millions of entrepreneurs automate the boring stuff, so they can focus on what matters most.

We're experiencing significant growth and are looking for a Senior/Staff Backend Engineer to support our rapid product growth. This is an in-person role focused on owning and evolving our backend services to create a modern, AI-native developer experience.

• Partner with the Product, AI, and Operations teams to architect new features and complex agentic systems.
• Build and maintain backend services and APIs that power Kick’s core product to ensure systems are secure, well-tested and high performance.
• Make clear architectural tradeoffs that balance between platform, product and business goals.
• Design and implement distributed services to orchestrate data pipelines, automate investigations, and enable incident response at scale.
• Own operational best practices so engineers can ship multiple times a day with confidence.
• Set engineering standards for writing, communication and system design influencing how a modern AI-native product is built.

• 5-10+ years of experience designing, building and operating production backend systems.
• Deep backend engineering skills including API design, data modeling and reasoning about distributed systems tradeoffs.
• Hands on experience running AWS/GCP with a strong understanding of how infrastructure impacts application reliability and performance.
• Practical experience with CI/CD including testing and deployment strategies.
• Solid grasp of observability and healthy on-call practices.

• Experience as an engineer at an early-stage or scaling startup.
• Exposure to modern AI/ML systems.
• Experience working on product without a product manager

• TypeScript, React, Node.js
• AWS, Terraform
• Postgres
• OpenAI, Azure AI
• GitHub, Slack, Linear, Figma, Notion

• Wroclaw, Poland, 4-5 days per week in person
• Office is located next to the Wroclaw main train station
• Candidates should be based in Wroclaw or open to relocation