Senior Full Stack Engineer (B2B - Warsaw)
- Level
- Mid–Senior
- Apply from
- Poland
Advertised before — reposted once in August 2026 This listing closed and was put back up. It usually means the search has been running a while.
About the role
- Collaborate with cross-functional teams to deliver features.
- Design and maintain efficient Ruby/Elixir code.
- Work with a polyglot stack including TypeScript.
- Embrace Domain-Driven Design for product quality.
- Contribute to a migration to microservices architecture.
Skills the posting asks for
- Ruby
- Elixir
- TypeScript
Summarised from the employer’s posting, which is reproduced in full below.
The employer’s full posting
Location: Warsaw, Poland — Onsite (4 days on-site)
Contract: B2B
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.
Marketplace + SaaS platform + Fintech
Fresha is the leading AI operating system trusted by millions of consumers and businesses worldwide. Fresha is used by 130,000+ businesses and 450,000+ stylists and professionals worldwide, processing over 1 billion appointments to date. Empowering businesses with an all-in-one platform for bookings, point-of-sale, marketing, and more, while connecting consumers to local services.
Your Impact as a Full Stack Engineer
At Fresha, we believe AI is a force multiplier for feature delivery, not just a coding assistant. We provide every engineer with top-tier tooling (Claude, GitHub Copilot, Cursor) to strip away technical toil—so you can focus your energy on shipping high-impact product features. We value engineers who know how to leverage these tools to drive momentum within our 6-week cycles, accelerating the journey from concept to code while maintaining the deep technical judgment to verify, secure, and own the final user experience.
Are you ready to make a significant impact in a fast-paced, autonomous environment? We're seeking an exceptional Backend Engineer to join our cross-functional product team in Warsaw.
What You'll Do
What We Are Looking For
Why Join Fresha?
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
Contract: B2B
- 25–40 k PLN net / month + RSUs
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.
Marketplace + SaaS platform + Fintech
Fresha is the leading AI operating system trusted by millions of consumers and businesses worldwide. Fresha is used by 130,000+ businesses and 450,000+ stylists and professionals worldwide, processing over 1 billion appointments to date. Empowering businesses with an all-in-one platform for bookings, point-of-sale, marketing, and more, while connecting consumers to local services.
Your Impact as a Full Stack Engineer
At Fresha, we believe AI is a force multiplier for feature delivery, not just a coding assistant. We provide every engineer with top-tier tooling (Claude, GitHub Copilot, Cursor) to strip away technical toil—so you can focus your energy on shipping high-impact product features. We value engineers who know how to leverage these tools to drive momentum within our 6-week cycles, accelerating the journey from concept to code while maintaining the deep technical judgment to verify, secure, and own the final user experience.
Are you ready to make a significant impact in a fast-paced, autonomous environment? We're seeking an exceptional Backend Engineer to join our cross-functional product team in Warsaw.
What You'll Do
- 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 as we continue moving to a microservice architecture.
- Embrace Domain-Driven Design to build high-quality, impactful products from inception to delivery.
What We Are Looking For
- AI-Augmented Workflow: You have deep experience building and interacting with AI agents, using them to amplify your output to 5x that of manual coding. You are able to integrate agents into our workflow while strictly adhering to our architecture and security standards, taking full accountability for ensuring all generated code meets the quality expectations of a Senior Engineer.
- Experience building and maintaining globally distributed systems.
- Knowledge of event-driven architectures (Kafka).
- ~2+ years of experience in product engineering, developer tools, or infrastructure at scale.
- A pragmatic generalist who thrives on learning new frameworks and tackling complex challenges.
- Familiarity with languages such as Elixir, Ruby, or TypeScript is a plus.
Why Join Fresha?
- Real Impact: Directly influence our product and architecture in a rapidly growing global business.
- Cutting-Edge Tech: Work with modern technologies and contribute to a significant migration to microservices.
- Dynamic Culture: Be part of a team that encourages autonomy and innovation.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.