WE ARE REACTOR STUDIO
Your strategic design and development partner
We shift focus from just adding features to building the right product with a solid strategy.
Our Work
Partnership with Kiwi.com, leading European OTA since 2018
Providing meaningful impact on every step of the way to big companies like kiwi.com
7
years of strategic partnerships
>123
lead and implemented initiatives
>160
years of cumulative team experience
>50%
growth enabled
>24
million € of bottom line impact
- Product design
- Software architecture
- UX research
- Frontend
- Backend
- Engineering management

Quickstart
Specializing in end-to-end solutions, from product design to frontend and backend engineering. We streamline workflows for seamless document handling, contract management, and efficient payment solutions with integrated card services and transaction analysis.
Reduced bureaucracy
Launch your business effortlessly while we handle the details behind the scenes!
Company management
We provide essential tools for seamless operations, transactions, finance management, reporting, and analytics.
AI integration
Using AI to boost efficiency and productivity, allowing you to focus on what truly matters.
- Product design
- Software architecture
- Frontend
- Backend
- Engineering management

Revolutionizing Adventure Planning with AI
We partnered with 57hours to create an AI adventure concierge, using LLM and RAG technologies to transform how travelers book outdoor adventures. It’s a trip planner that understands goals, curates itineraries, and connects with 57hours’ guides through a natural chat.
LLMs
Powering personalised trip design and natural conversation flow, co-creating itineraries in real time based on user preferences.
RAGs
Enhancing recommendations with access to 57hours’ adventure database, ensuring suggestions are accurate and aligned with real experiences.
APIs
Integrating with 57hours’ booking system for seamless trip inquiries, guide coordination, and custom itineraries within the chat.
- AI engineering
- LLMs
- RAGs
- Backend

Our stats and achievements

10 years together
Our strong team cohesion, trust, mutual respect enabled us to prosper through the years, learning and growing from each experience.

20 domain experts
With +160 years of combined experience, we are a force to be reckoned with, carrying initiatives, empowering others for impact.

Deloitte Fast 50
Recognised and awarded for our excellence and continuous significant impact to our partners businesses.
How we do it

Research and Design
We collaborate with you to understand your unique needs, offering insights, and practical solutions.
- Market Analysis and Research
- Design Sprint Workshop
- Interaction Design and Prototyping
Innovative Development
We craft a roadmap that aligns with your vision, ensuring every move is purposeful and impactful.
- Software Architecture
- Front-End Development
- Backend Development
Strategy and Consulting
Businesses across various sectors that are leaders in adopting cutting-edge technologies and practices to set new industry standards.
- Process Optimization
- Agile Coaching
- Business Strategy
Do you need CTO as a service?
Do you need CTO as a service?






Community

UX Research Zagreb
Group dedicated to the promotion of UX research and encouraging its development. Building a platform for sharing knowledge...

JavaScript Zagreb
Group dedicated to the promotion of UX research and encouraging its development. Building a platform for sharing knowledge...
We can host your meetup
We can offer you our meetup space to host your next meetup with the support of our experienced meetup organizer to make sure everything goes as planned.
~50 people capacity
Access to experienced meetup organizers (mentors)
17:30 – 21:00 (3.5 hours) availability for our spaces
We can sponsor food and drinks
