Fullstack Developer

About The Company

At Smartness
, we are building the future of hospitality tech. Our SaaS helps lodging providers boost revenues by 30%+ and get more direct bookings. We are the fastest-growing B2B SaaS in the industry, trusted by 4,000+ clients across 40+ countries
, with billions of euros in bookings processed. Backed by top international investors and named one of Italy's Top 10 Linked In Startups, we are on a mission to scale globally. Want to grow with us? Let's go!

About The Role

What Will You Do?

Our technology team is developing a range of innovative solutions to help service providers optimize the management of their businesses. We are making significant investments in R&D with the goal of doubling the number of products offered by the end of the year, and to achieve this, we are expanding our engineering team. As a Full-Stack Developer, you will contribute to the development and evolution of the Smartness platform, working end-to-end across backend services, integrations, and user-facing applications.

You will play a key role in designing, building, and maintaining connections between our platform, multiple product domains, and Partners’ APIs, gaining a deep understanding of system architecture and data flows. You will tackle both technical and product-driven challenges, helping to deliver scalable, reliable solutions that support business growth. Your work will enable seamless communication with external systems, unlock new features and integrations, and ensure high performance and quality through close collaboration with engineering and product teams.

You Will Be Responsible For

• Design, develop, and maintain API integrations with new and existing Partners, ensuring reliable and scalable data flows
• Independently build and evolve internal and external APIs, contributing to the Smartness umbrella application architecture
• Collaborate with single product teams to clearly define domains, responsibilities, and integration contracts
• Analyze and interpret Partners’ API documentation and translate requirements into robust technical solutions
• Take ownership of features and integrations end-to-end, from design and implementation to deployment and maintenance
• Troubleshoot complex integration and system issues, proposing and implementing technical improvements
• Contribute to system performance, scalability, reliability, and observability (logging, monitoring, alerting)
• Write clean, maintainable, well-tested, and well-documented code following best engineering practices
• Leverage AI/LLM tools to improve development velocity (e.g. code generation, refactoring, documentation, reviews) when appropriate
• Work closely with internal stakeholders and external Partners to resolve technical challenges and align on solutions

What Are We Looking For?

• 5–7 years of experience in Backend or Full-Stack development within SaaS or product-driven environments
• Strong programming fundamentals in JavaScript and Type Script, with adherence to clean code, testing, and code review practices
• Deep understanding of the Node.js ecosystem and experience building APIs and backend services
• Experience with SQL databases, preferably Postgre
  
  SQL; familiarity with Redis is a plus
• Experience with microservices architectures, API design patterns, and event-driven or asynchronous distributed systems (nice to have)
• Ability to work effectively with an existing codebase and take ownership of complex features
• Experience collaborating in small, agile teams with end-to-end ownership of features
• Comfort interacting with external Partners to clarify technical requirements and integration details
• Strong problem-solving mindset, with the ability to propose solutions and improvements autonomously
• Nice to have: experience with modern frontend frameworks (e.g. Vue 3, React Native), AI/LLM-powered applications, or AI service integrations

What Do We Offer?

• Work in a small and top-performing team that moves extremely fast where you are extremely important.
• Work without having to deal with jerks and ego-maniacs.
• The opportunity to join one of the best travel-tech sales teams in Europe.
• A place where your talent can blossom.
• An environment where mistakes are allowed – we make bold…