Senior Front-End Developer

Our purpose

Koios Intelligence aims to revolutionise the insurance industry through artificial intelligence (AI) and natural language processing (NLP). We provide advanced virtual assistant solutions voice enabled to enhance customer & insurance agents experience, streamline operations, and drive innovation. By using state-of-the-art large language models and generative AI, we simplify complex insurance processes, improve decision-making, and enable personalised interactions for policyholders and insurers.

Job Summary

We are seeking an experienced and highly skilled Senior Front-End Developer to join our development team. As a Senior Front-End Developer, you will be responsible for designing and implementing user interfaces for web applications. You will work closely with our design and back-end development teams to create efficient, scalable, and visually appealing web solutions. 



  • Collaborate with designers and back-end developers to create user-friendly web interfaces that meet client requirements and design guidelines.
  • Develop high-quality, responsive web applications using HTML, CSS, and JavaScript frameworks such as React, Angular, or Vue.js.
  • Write clean, maintainable, and efficient code while adhering to best practices and coding standards.
  • Optimize web applications for maximum speed and scalability.
  • Conduct thorough testing and debugging to ensure smooth functionality across various browsers and devices.
  • Collaborate with cross-functional teams to identify and resolve front-end issues and implement effective solutions.
  • Stay updated on emerging trends and technologies in front-end development and share knowledge with the team.
  • Provide guidance and mentorship to junior developers, conducting code reviews and offering constructive feedback.
  • Participate in the full software development lifecycle, including requirements gathering, planning, and estimation.


  • Bachelor’s degree in Computer Science, Software Engineering, or a related field (or equivalent experience).
  • Proven experience as a Front-End Developer, with at least 7 years experience working in Front End Development.
  • Strong proficiency in HTML, CSS, and JavaScript.
  • Extensive experience with modern JavaScript frameworks/libraries such as React, Angular, or Vue.js.
  • Proficiency in version control systems (e.g., Git) and front-end build tools (e.g., Webpack, Gulp).
  • Solid understanding of responsive design principles and cross-browser compatibility.
  • Experience with web performance optimization techniques.
  • Familiarity with server-side CSS preprocessors (e.g., Sass, LESS) is a plus.
  • Excellent problem-solving and debugging skills.
  • Strong communication and collaboration abilities.
  • Ability to work independently and manage multiple projects simultaneously.
  • Portfolio or examples of previous work showcasing front-end development skills are highly desirable.

What we offer for your valuable work

  • You’ll join a collaborative, fun team where everyone, including you, is active in the product definition and development process. Our founders are lifelong entrepreneurs who have built and scaled large companies. By working with founders and sitting on our leadership team, you will have the front-row seat to see how a company grows and scales.
  • We provide quality collective insurance to all employees and their families, including dental care.
  • We support 50% of expenses related to sports (gym memberships, sportswear, etc), up to 250 dollars a year.
  • We refund 50% of public transportation expenses, up to 50$ a month.
  • While Koios promotes both teamwork on-site to ensure commitment, efficiency and employees’ professional development, we also offer the flexibility needed for a healthy professional/personal life balance.
  • We Offer Stock Options after an approbation period.
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