Backend Engineer (B2B - Warsaw)

Fresha is the operating system for the global beauty, wellness and self-care industry, connecting and powering everything from salons and barbers to spas, medspas, fitness studios and health practices. It combines Marketplace, SaaS platform, and Fintech. Fresha is used by over 130,000 businesses and 450,000 stylists and professionals worldwide, processing over 1 billion appointments.

• Deep experience building and interacting with AI agents, integrating them into workflow while adhering to architecture and security standards.
• Experience building and maintaining globally distributed systems.
• Knowledge of event-driven architectures, especially Kafka.
• Approximately 2+ years of experience in product engineering, developer tools, or infrastructure at scale.
• Pragmatic generalist with the ability to learn new frameworks and tackle complex challenges.
• Familiarity with programming languages such as Elixir, Ruby, or TypeScript is a plus.

• Collaborate closely with Product, Design, Frontend, Infrastructure, and Mobile engineers to take features from discovery to rollout and beyond.
• Be responsible for features from discovery to observability: technical design, implementation, testing, and rollout.
• Design, build, and maintain efficient, scalable, and reliable Ruby/Elixir code.
• Work with a polyglot stack (Ruby, Elixir, GraphQL, TypeScript, gRPC) and modern messaging systems (Kafka).
• Operate within a Kubernetes-driven environment during migration to microservice architecture.
• Embrace Domain-Driven Design to build high-quality, impactful products from inception to delivery.

The role is onsite in Warsaw, Poland, requiring 4 days on-site per week. The contract type is B2B. The company may use AI tools in parts of the hiring process but emphasizes that final hiring decisions are made by humans.