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Senior Full-stack Engineer at Numa · Katori

ABOUT NUMA

Hey there! We’re Numa, a forward-thinking hospitality brand redefining how people discover cities. We create spaces where simplicity meets innovation, offering thoughtfully designed rooms, studios, and apartments in the heart of Europe’s most vibrant neighbourhoods.
We’re not just transforming the guest experience—we’re revolutionizing the hospitality industry from the inside out. Our cutting-edge technology streamlines operations, delivering unparalleled value with no hidden fees—just real, quality experiences.
At Numa, we believe that travel should be curious and authentic, and we bring those same values to our work culture. As part of our team, you’ll experience a dynamic and supportive environment where creativity thrives, and your contributions make a real impact. We’re committed to fostering a diverse, inclusive, and equitable workplace where every voice is valued, and different perspectives fuel our innovation.

About the Role

We're looking for a Full-Stack Engineer to join our Travel Experience team. This is a tight-knit, guest-facing team building products in areas such as online check-in, trip management, guest communication, and authentication.

You'll be the third engineer on a team with a Lead Engineer, Product Manager, and Product Designer. The work is full-stack, though with a user-facing tilt. You'll build polished interfaces in Next.js while also shaping the NestJS APIs and services behind them.

Our Stack & How We Work

Frontend

Next.js hosted on Vercel
TypeScript, React, CSS Modules
Zod, React Hook Form
Storybook
React Aria Components, RadixUI

Backend

NestJS microservices running on AWS Lambda
AWS services such as DynamoDB, SQS, SNS, and EventBridge
SST for Infrastructure as Code
New services adopt Clean Architecture, use-case driven, easy to test, and AI-friendly

Monitoring

Lumigo and Sentry

Developer Tools

Claude Code and Cursor for AI-assisted development
GitHub with CodeRabbit for code reviews

Process

Linear for product management
2-week sprints with daily standups, refinements, sprint planning, and retros
First Friday of each sprint is dedicated to tech gardening, where we improve our codebase, documentation, monitoring, and chip away at technical debt

What We're Looking For

Strong technical skills are important, but how you approach your work is just as important.

You're a good fit if you:

Own your work. When something's unclear, you investigate, propose solutions, and unblock yourself. You stick to your word.
Communicate proactively. When something's off, you raise it constructively in standups, retros, or Slack. Not as blame, but as a path forward.
Obsess over quality. We're guest-facing. Details matter. You catch the edge cases, polish the UI, and don't ship "good enough."
Learn fast and stay curious. You seek feedback, evolve your skills, and aren't defensive when someone challenges your approach.
Have good product taste. You understand trade-offs, think beyond the ticket, and balance technical decisions with what's best for the guest experience.
Thrive in a fast-paced environment. We move quickly. You're energized by that, not overwhelmed.
Lift others up. You share context, give thoughtful code reviews, and help teammates grow. You're patient when pairing and generous with your knowledge.

Requirements

4+ years of professional full-stack engineering experience
Strong experience with Next.js, TypeScript, React, and CSS
Strong experience with Node.js and API design
Hands-on experience with serverless (Lambda, DynamoDB, SQS, SNS)
Comfortable with Agentic workflows, able to leverage agents in a structured way
Fluency in English
Self-starter with an ownership mindset

Nice to Have

Familiarity with NestJS
Experience with Infrastructure as Code (SST preferred)
Exposure to Clean Architecture or Domain-Driven Design patterns

ABOUT OUR OFFER

Empower your career: Thrive in a fast-paced, collaborative environment where your ideas help shape our future. Enjoy opportunities for professional growth and build a fulfilling career path.
Experience our brand: Immerse yourself in the Numa lifestyle with a complimentary stay. Share the love with friends and family through exclusive discounts on our stylish apartments. Connect with a global community of colleagues at our inspiring team-building events.

Numa values the diversity of the people it hires and serves. Diversity at our company means fostering a workplace in which individual differences are recognised, appreciated, respected and responded to in ways that fully develop and utilise each person’s talents and strengths. We therefore welcome applications from people of all races, ethnicities, disability statuses, ages, religions, gender identities, and sexual orientations.

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Senior Full-stack Engineer