Fresha Jobs

Senior Full Stack Engineer (B2B - Warsaw)

Fresha

Senior Full Stack Engineer (B2B - Warsaw)

Reposted 10 Days Ago

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Warsaw, Warszawa, Mazowieckie, POL

In-Office

25K-40K Annually

Mid level

Beauty • Software

The Role

As a Senior Full Stack Engineer, you'll collaborate across teams to design, implement, and maintain scalable features using Ruby and Elixir within a microservices architecture, while leveraging AI to enhance productivity.

Summary Generated by Built In

Location: Warsaw, Poland — Onsite (4 days on-site)

Contract: B2B · 25–40 k PLN net / month + RSUs

The AI-powered OS for beauty,
wellness and self-care

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.

To foster a collaborative environment that thrives on face-to-face interactions and teamwork, all Fresha employees work from the office four days per week, with the flexibility to work remotely on Wednesday each week. Warsaw: 20th Floor, Aleje Jerozolimskie 81, 02-001 Warsaw, Poland

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.

At Fresha, we value passion and potential as much as specific skills. If you're enthusiastic and eager to learn, we encourage you to apply, even if you don't meet every listed requirement. We believe in fostering growth and providing the support needed for you to excel in your role.

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.

Don't meet every requirement? We value passion and potential. Apply today and let's grow together!

Interview Process

Screen call - Video call with a member from the Talent Team - 30 - 60 minutes
1st stage - Technical Video call/In-person interview with our Engineers- Up to 90 minutes
Tech stage - Technical Video call/In-person interview with our Engineers - up to 2 hours
Final stage - Video call/In person meet with our CTO - up to 60 minutes

We aim to complete the entire interview process and deliver feedback within 4 weeks.

Every job application received is reviewed manually by our talent team. While we strive to assess applications within 7 days, the sheer volume of talented individuals expressing interest may occasionally extend this timeframe

Skills Required

2+ years of experience in product engineering, developer tools, or infrastructure at scale
Experience building and maintaining globally distributed systems
Knowledge of event-driven architectures (Kafka)
Familiarity with languages such as Elixir, Ruby, or TypeScript

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The Company

HQ: London

287 Employees

Year Founded: 2015

What We Do

Fresha is the world's largest and top-rated booking platform for Beauty and Wellness trusted by millions of consumers worldwide. Fresha is used by 70,000+ businesses and 300,000+ professionals worldwide, processing over 20mil appointments per month. Fresha is headquartered in London, United Kingdom with global offices located in New York City, Vancouver, Sydney, Dublin, Amsterdam , Dubai and Warsaw. The company raised $185M in venture capital funding to date from leading institutional investors. Fresha allows consumers to discover, book and pay for beauty and wellness appointments with local businesses via its marketplace, while beauty and wellness businesses and professionals use an all-in-one platform to manage their entire operations with its intuitive free business software and financial technology solutions. Fresha’s ecosystem gives merchants everything they need to run their business seamlessly by facilitating appointment bookings, point-of-sale, customer records management, marketing automation, loyalty, beauty products inventory and team management. The consumer marketplace unlocks revenue potential for partner businesses by leveraging the power of online bookings and automated marketing through mobile apps and advanced integrations with major tech brands including Instagram, Facebook and Google.