Senior Fullstack Developer 🌍 (Node.js + React)

As Polish outsourcing company with Scandinavian roots, we particularly appraise values such as energy, logic and experience, this all comes in a Scandinavian work culture.

Imagine building a product that helps hotels and venues worldwide sell smarter, manage availability in real time and reach thousands of distribution channels — all from one platform.

At B3 Consulting Poland, we’re looking for Senior Fullstack Developers to join a product-driven team working on a global SaaS platform for the hospitality industry. The solution supports hotel room group bookings as well as physical meeting rooms and event venues, connecting supply with demand at massive scale.

The ambition?

👉 Over 100,000 venues with live availability connected globally, making this platform the largest distribution network in the world. 

About the product:

The platform consists of three core products used daily by hoteliers and venues:

• Venue & Sales Management

  Manage content, inventory, pricing, business rules and system integrations in one place.

• Internet Booking Engine

  White-label booking technology that can be embedded into customer websites using a no-code setup or APIs.

• Channel Manager & Global Distribution

  One interface to distribute inventory and control sales across 10,000+ connected channels worldwide.

You’ll join a ~15-person product team focused on continuously building and evolving new features of the SaaS platform.

Your role & responsibilities:

• Design, develop and implement new product features

• Enhance and maintain existing functionalities

• Work on a vendor-agnostic integration platform

  (initial focus more on backend development)

• Build scalable and reliable services

• Write clean, maintainable code following best practices

• Take part in database design and architecture decisions

• Own your work together with the team — from idea to production

• Collaborate closely with other engineers, product owners and stakeholders

There are small, autonomous teams, where responsibility and impact are shared.

Tech stack:

Frontend

• React; TypeScript; Redux; Tailwind

• Migration in progress to Next.js

Backend

• Node.js; Nest.js; TypeScript

Database

• PostgreSQL

Infrastructure & tools

• AWS (for the cloud)

• GitHub; Slack; Notion; Linear (to manage daily work)

Nice to have:

• Experience with modern productivity tools (e.g. GitHub Copilot, ChatGPT, Loom, Raycast/Alfred)

• Knowledge of PHP & MySQL (legacy parts, ongoing migration)

• Familiarity with Figma and collaboration with a design team

• Experience with Tailwind CSS and Storybook

• Understanding of online payments & billing (VCC, payment gateways)

• Experience with Adyen, Elavon or Stripe

What we’re looking for:

• Experience as a Senior Fullstack Developer (5+ years) in product or SaaS environments

• Strong knowledge of TypeScript

• Solid backend experience with Node.js / Nest.js

• Good understanding of scalable architectures

• Confidence in database design

• Fluent English

• Product-oriented mindset and sense of ownership

• Ability to collaborate in cross-functional teams