Kolsquare is the #1 Influencer Marketing software solution in Europe, used by marketing professionals for managing KOL Marketing campaigns (K.O.L for Key Opinion Leaders, aka Influencers), and designed to optimize brand communication strategies in response to new digital challenges. Using our technology, professionals can identify the best KOL profiles, fully manage their KOL Marketing campaigns and measure their results and performances.
Kolsquare offers hundreds of customers Sézane, Decathlon, Coca-Cola, Danone, Publicis, Orange, etc.) and NGOs Génération Numérique, Marion La Main Tendue, Surfrider Foundation, etc.) the latest technologies to activate inspiring and genuine partnerships with over 3M Influencers in 180 countries on Instagram, TikTok, YouTube, Facebook and Twitter (now X).
In 2024, Kolsquare joined the team.blue group, one of the largest private tech companies in Europe, with a culture of innovation and excellence, to further fuel its impressive track record of outstanding profitable growth.
OUR MISSION
Kolsquare exists to help you reach your greatest potential. And positively impact the world.
Influencer Marketing is today described as a revolution, a 20B$ market that is a major transformation in the media and digital world. It has also become a real gold mine, creating high hopes but also bringing its share of myths and legends. Everyone knows it works and can have an amazing impact on brand awareness or customer acquisition, but not everyone knows exactly how to do it. At Kolsquare, we firmly believe in this new media and are convinced that it's the best way for ideas, people and organisations to grow and reach their greatest potential. We also believe that it's a great way to create positive impacts for a better world. Our mission is therefore to give everyone access to the power of Influencer Marketing.
YOUR MISSION
You won't just be writing code; you will have a direct impact on architecture decisions, product quality and the pace at which we deliver value to our users. This is an early-stage product with serious ambition, and you'll play a foundational role in shaping it.
YOUR ROLE
- Full Stack Development: Build and maintain features end-to-end - from Rails API endpoints and background jobs to React Native screens and components - ensuring a seamless experience across iOS and web.
- Architecture & Code Quality: Contribute to architecture decisions, advocate for simplicity and maintainability, and uphold high standards through code reviews, testing and clean abstractions.
- Platform Integrations: Work with social media APIs (Instagram, TikTok, Facebook), payment systems (Stripe) and third-party services, handling OAuth flows, webhooks and data synchronization reliably.
- Infrastructure & Deployment: Participate in our deployment pipeline (Kamal on GCP), background job processing, monitoring and observability — keeping the product stable and performant in production.
- Cross-Functional Collaboration: Work closely with product and design to turn user needs into technical solutions, synchronize with the broader Kolsquare engineering team to leverage shared data and mutualize features when possible.
- You have a minimum of 3 years of experience in Ruby / Rails, and relevant experience with React (preferably Native)
- You enjoy shaping the technical direction of early-stage projects and laying down a robust foundational architecture
- You are autonomous, organized and proactive, with demonstrated ability to prioritize and manage multiple projects in a fast-paced environment
- You know how to leverage AI to optimize your output, in terms of quality and quantity
- You are empathetic and you love working with people from different backgrounds
- You have excellent communication skills, with the ability to collaborate effectively across teams
- You are fluent in English
- You are a passionate person and you have determination to reach any goal
- You are curious and want to learn, improve and gain responsibility
- You want more than just a job! Kolsquare is a benefit company, with a general ambition that goes beyond our profitability goals: positively impact the world
- Deliver WOW
- Be Responsible in your actions
- Pursue Growth & Learning
- Be passionate and determined
- Share your Power, Knowledge & Wealth
- Build Authentic relationships
📌 More info about culture here in our Culture Book.
WHAT DO WE OFFER?
- You can be based anywhere in Europe.
- Full flexibility: full remote work with European hubs and 400+ coworking spaces worldwide.
- Monthly and quarterly highlights in person to get together with other Kolsquarians for great team building events.
- A package linked to the market that will not be based on your location.
- The stability and resources of a profitable group, with the agility of a scale-up.
- Continuous training opportunities and career development support.
Kolsquare’s technology enables marketing professionals to easily identify the best Content Creators’ profiles by filtering their content and audience, and to build and manage their campaigns from A to Z, including measuring results and benchmarking performance against competitors.
Kolsquare has built a thriving global community of influencer marketing experts, and offers hundreds of customers (Coca-Cola, Netflix, Sony Music, Publicis, Sézane, Sephora,, Lush, Hermès…) the latest Big Data, AI and Machine Learning technologies to drive inspiring partnerships, tapping into an exhaustive network of KOLs with more than 5,000 followers in 180 countries on Instagram, TikTok, X (Twitter), Facebook, YouTube and SnapChat.
As a Certified B Corporation, Kolsquare has been pioneering Responsible Influence by championing transparency, ethical practices, and meaningful collaborations to inspire change.
Since October 2024, Kolsquare forms part of Team.Blue, a leading digital enabler for businesses and entrepreneurs across Europe made up of over 60 successful brands in the fields of web hosting, domains, e-commerce, online compliance, lead generation, application solutions, and social media.
