Senior Frontend Developer

At Kolleno
London, UK (or remote)

About The Role

We’re hiring two Senior Frontend Developers to help us build the future of late payments collection.

You’ll be joining us right at an amazing stage of our development to deliver a truly unique B2B late payment technology, and we want you here for the long term with stock options. We’re looking for someone ambitious to come and own setting up Kolleno growth function – working directly with experienced founders and senior team who have worked at large international corporates (i.e., Goldman Sachs).

You’ll join a fast-paced team where you’ll be testing, learning, and iterating as fast as you can. We’re looking for someone data-driven and curious, who can ruthlessly prioritise and focus. You will need a strong sense of initiative.

About The Company 

Our mission is to help every business to get paid on time. It is a crippling issue across all industries that nobody has managed to solve… until Kolleno arrived.

We’re building the future of cash management for companies: from invoices chasing to payments reconciliation. The full cycle is done through Kolleno, promising exponential growth in the FinTech arena.

We’re optimistic, hard-working, full of energy, and creative. We’re looking for like-minded people who want to be part of a once in a lifetime adventure.

What You’ll Be Doing

You will be instrumental in the development of the frontend for our cutting-edge Kolleno product, encompassing the design, structural layout, and execution of HTTP calls to APIs developed by our skilled backend team.

Your code will serve as a crucial component in driving the growth of the company, necessitating a collaborative approach with various departments. You will work in tandem with the founders, data science, backend, sales, marketing, and account management teams to ensure the final product aligns with our company’s strategic objectives.

Joining a dynamic and experienced team, we are looking for an adaptable team player who is willing to extend their support to areas beyond their primary role and eager to embrace greater responsibility as the team continues to evolve.

What We’re Looking For

– Extensive experience with HTML / CSS

– 2+ years experience programming in JavaScript and/or TypeScript

– Strong experience with ReactJS

– Understanding of APIs (web services)

– Capacity to reproduce wireframes into a live web page

– Willingness to step forward and suggest ideas, comments, remarks

Technologies We Use

Core Technologies: Typescript, React, Redux, Material-UI, Webpack

Supporting Libraries: React Router, Lodash

Testing: Jest, Cypress, React Testing Library


Is this a full-time role?

Yes. Ideally this person would join us full time asap.

Can I work remotely full-time?

Yes. We also have an office in central London.

What’s the hiring process?

Very simple:


Your first phone call will be with Ron Danenberg (Founder & CTO).

– This will be to find out more about your background and introduce you to Kolleno.

– We’ll want to hear about your greatest hits and why you’re proud of them.

– We’ll discuss your experience in depth and explain how growth and technology will work together at Kolleno.

– Duration: [20-30 mins]


The second stage is technical:

– You will need to either: (a) do a small project at home, or (b) you will share with us an interesting repo you have on GitHub (or another version control platform).

– We will then have a discussion about the code you wrote, and the technical challenges at Kolleno [45 mins].


If you progress to the next stage, we will introduce you to key team members.

Apply now

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