Fullstack React Engineer

1 week ago


København, Denmark Certainly Full time

Certainly is a Conversational AI Platform made for ecommerce and customer service. Our platform is designed to build a tailormade AI conversational chatbot for global complex customer service journeys with multi domain, and multilingual demands.

We are currently around 20 happy faces working in a hybrid setup. Management is in Copenhagen, while product development is happening throughout Europe. We have been working in Conversational AI for many years and are deeply involved in being at the top of the market with our product and offerings. Our ChatBots are widely used by huge clients such as Ganni, Feastables and Ticketmaster.

We are seeking an experienced and skilled Fullstack Engineer to join our team.

As a Fullstack Engineer, you will be responsible for leading the design, development, and maintenance of our service platform built with Next.js and React. You will develop using the newest frameworks within Frontend development.

You will work closely with cross-functional teams to ensure the delivery of high-quality, scalable, and efficient software solutions that meet the needs of our customers. If you have a passion for fullstack development and enjoy leading and mentoring others, we would love to hear from you.

Key Responsibilities
  • Lead the design and development of frontend systems and applications, ensuring scalability, reliability, and performance.
  • Collaborate with cross-functional teams to identify and prioritize project requirements and deliverables.
  • Design and implement efficient and scalable frontend architectures, using state-of-the-art technologies.
  • Develop and maintain high-quality, well-tested, and documented code.
  • Mentor and guide junior engineers and developers to improve their skills and knowledge.
  • Participate in code reviews and provide constructive feedback to improve code quality and maintainability.
  • Troubleshoot and debug complex issues in the frontend systems and applications across frontend and backend systems.
  • Work closely with the DevOps team to ensure smooth deployment and monitoring of frontend systems.
  • Stay up to date with the latest technologies and trends in the industry, and apply this knowledge to improve our frontend systems and applications.
  • Participate in planning and prioritization of project tasks and resources.
  • Collaborate with QA engineers to ensure the quality and reliability of the frontend systems and applications.
  • Participate in code refactoring and optimization to improve performance and scalability.
  • Develop and maintain technical documentation and knowledge base articles.
  • Participate in technical discussions and provide input on technical decisions.

You will be working in a Tech-stack built around Next.js 15 as a fullstack developer:

  • Stylesystem: TailwindCSS, ShadCN
  • Frontend: Typescript, Next.js (15), React (19) and React-flow (12)

Additionally, we are working closely with a large Python API and several standalone widgets.

Required Skills

We are looking for a person who has experience and conquer most of the following skills:

Web Technologies:

  • Solid understanding of Typescript, React, Next.js (preferably 13.0 or newer).
  • Strong proficiency in React, including hooks, context API, and component lifecycle.
  • Familiar with the React flow library.
  • Solid understanding of REST APIs and asynchronous request handling.
  • Familiarity with server-side rendering (SSR), Server-components, and client-side rendering.
  • Familiarity with Micro-services and microservice architecture.
  • Fullstack architecture and data structure for performant user and data-driven platform.

Version Control:

  • Proficiency in using version control systems, particularly Git, including branching strategies and collaborative workflows.

DevOps and CI/CD:

  • Familiarity with containerization technologies like Docker and orchestration tools like Kubernetes.
  • Experience with continuous integration and continuous deployment pipelines using tools like Jenkins, GitLab CI, or GitHub Actions.
  • Experience with cloud service providers such as AWS, Google Cloud Platform, or Azure, particularly with services relevant to web application deployment and scaling.
Additional Requirements
  • At least a bachelor’s degree in computer science, Computer Engineering, or related field.
  • At least 5 years of experience in frontend development and leadership.
  • Strong problem-solving skills and attention to detail.
  • Excellent communication and collaboration skills.
  • Ability to work in a fast-paced environment and prioritize tasks effectively.
  • Strong understanding of software development principles, patterns, and best practices.
  • Understanding of security and compliance requirements.
What We Offer
  • Competitive salary and benefits package.
  • Opportunity to work on challenging and exciting projects.
  • Collaborative and dynamic work environment.
  • Professional development and growth opportunities.
  • Flexible working hours and remote work options.
  • Access to the latest technologies and tools.
  • Recognition and rewards for outstanding performance.
Interested?

Don’t hesitate to send an application to CTO Hans Peter Vith.

Hans Peter Vith
CTO

+45 2086 6099

#J-18808-Ljbffr
  • Fullstack Engineer

    4 months ago


    København, Denmark The HubDanske Bank Full time

    What we do We're on a mission to simplify and accelerate how teams and organizations develop solutions for the cloud. Langstack is an AI-powered development platform that enables teams to collaborate, create, and manage AWS solutions with unmatched efficiency. Azure and GCP are on the horizon. We're convinced that there's a better way to develop for public...

  • Fullstack Developer

    4 months ago


    København Huse, Denmark Omada AS Full time

    Are you a highly skilled Fullstack Developer and do you want to grow your career in an international company with offices in Europe and US? We are a Gartner Magic Quadrant Leader in the Identity Governance & Administration category and one of the most advanced SaaS platforms in the industry. Our vision is to “secure the worlds identities” and leverage...


  • København, Denmark Sambla Sverige Full time

    With a strong focus on customer satisfaction, we are a team of dedicated employees helping individuals improve their finances. As colleagues, we are a group of friends who share a hunger for constant development and a drive to become the best in the industry. With 350+ teammates, we create the opportunity to achieve our goals together. Each colleague’s...

  • Software Engineer

    4 months ago


    København, Denmark Lime Technologies Full time

    Applications are considered on a rolling basis Multiple locations Hybrid Job Description Lime Go Engineering Culture Software is the core of our business at Lime and there is no gap between engineers and business. We work together in a cross-functional mid-size team (3-5 people). We meet regularly with our Product Managers and decide what is...


  • København, Denmark Famly Denmark Full time

    At Famly, we’re looking for a Copenhagen-based React Senior Engineer to build awesome React apps and UIs to help the thousands of daycares that use Famly have a great experience. You would need to have a minimum of 4 years of experience and have a good grasp of React development, Git handling, etc. These days, the 170 of us building Famly talk about trying...


  • København, Denmark Ageras Group Full time

    About Ageras: Ageras are a pioneering fintech firm headquartered in Copenhagen and we have one goal:to be the leading fintech solution and one-stop platform for freelancers and small business financial needs across Europe. Ageras is home to successful fintech brands and Advisor and are in core markets across France, Germany Denmark and the Netherlands....

  • Mobile Engineer

    1 week ago


    København, Denmark Punch Group Full time

    At Holepunch, we are not just developing software; we are redefining the internet's architecture to empower users and protect privacy. Our pioneering peer-to-peer (P2P) development platform, built on our open-source technology stack, Pear, eliminates the need for traditional server infrastructure. This revolutionary approach ensures that users maintain full...


  • København, Denmark The HubDanske Bank Full time

    About Kanpla At Kanpla, we’re transforming how canteens operate, making meals easier to access and more delightful to experience. Our platform serves thousands of people daily, and we’re just getting started. As a high-growth company, we value autonomy, simplicity, and the drive to make a tangible impact. If you’re passionate about shaping...


  • København, Denmark Sprinteins Full time

    Beschreibung We are looking for a talented and motivated Software Engineer to join our team and help build custom web applications for enterprise IT solutions. In this role, you will be responsible for designing, developing, and maintaining high-performance, scalable, and secure web applications that meet the needs of our enterprise clients.You will work...


  • København, Denmark Twoday Group Full time

    twoday er den førende digitale transformationspartner i Nordeuropa med en global tilstedeværelse. Med cirka 3.000 teknologer samarbejder vi med de mest beundrede private og offentlige organisationer for at levere banebrydende digitale løsninger. Vores dybe brancheekspertise omfatter Data & AI, softwareudvikling, digitale oplevelser og...

  • Software Engineer

    4 months ago


    København, Denmark Lenus eHealth Full time

    Lenus Copenhagen Full-time Salary Competitive Lenus is looking for a Software Engineer for our Copenhagen office. Are you passionate about engineering, curious about product development, and eager to contribute your unique perspective? We’re looking for talented software engineers with diverse experiences to join our dynamic team. Who are we looking for?...


  • København, Denmark Trustpilot AS Full time

    What you’ll be doing: Own the delivery of major initiatives and balance delivery with sustainable engineering practices You bring together the work of many teams and individuals into a cohesive, achievable plan that aligns with the goals and deadlines of the company You use your expertise to improve Trustpilot’s capabilities in your domain You devise,...

  • Frontend Engineer

    4 months ago


    København, Denmark SOUNDBOKS Full time

    SOUNDBOKS is a dynamic and innovative audio tech company and an aspiring lifestyle brand. You may have seen our products and us at a music festival, your favourite sport event, your friend’s celebration, or at your beloved artist’s release party. We create the loudest, most durable, and arguably the coolest Bluetooth speakers on the market. Growth is not...

  • Backend Engineer

    4 months ago


    København, Denmark Teton.ai Aps Full time

    Software Development Full-time Copenhagen, DK About Teton-ai: At Teton-ai, we are redefining the role of healthcare workers through cutting-edge AI technology. Facing a global nursing shortage, our solutions offer vital support to overburdened health systems. With over 250 patient rooms already benefiting from our technology, we are ambitiously...


  • København, Denmark Fadata Group Full time

    Overview At Fadata, we take pride in our ability to adapt quickly to the ever-changing needs of our market and customers. This means that you, too, should be ready to embrace change as circumstances evolve. If you're excited about a fast-paced, dynamic environment where strategy is set but flexibility to grow with the market remains, then hit the apply...


  • København, Denmark Banking Circle Full time

    Are you an analytical and structured problem solver, who wants to work on a high-volume payment system that supports large-scale financial corporations? Then look no further, as this might be the challenge you need. Banking Circle is a truly international and vibrant company with more than 550 skilled and dedicated employees worldwide. We are a...

  • Frontend Engineer

    3 weeks ago


    København, Denmark Kommunikationsforum Full time

    Do you want to help shape a unified, user-friendly digital platform that enhances our freight operations across Europe and beyond? Are you looking for a role where you can contribute to building modern and scalable frontend experiences? If so, you could be the newest addition to our team as a Frontend Engineer. Be part of the movement - and play your part. ...


  • København, Denmark The HubDanske Bank Full time

    If you are passionate about cloud software development, team collaboration, and creating outstanding web applications, join Spirii’s fantastic growth journey to lead the way for a sustainable future. Spirii develops and provides world-class charging products and digital solutions to customers with electric cars. Our Digital Development department is proud...


  • København, Denmark Tbwa ChiatDay Inc Full time

    Do you love clean code and beautiful architecture? Do you like shipping the highest-quality products? We are ramping up our team and want to hear from you! About us: Templafy is the next-gen document generation platform that automates all document creation across organizations. Our platform eliminates manual document work allowing companies to drive...


  • København, Denmark Raffle.ai Full time

    Raffle AI Copenhagen Full-time Salary Competitive Our mission is to make searching for information and knowledge in companies easy with Artificial Intelligence (AI) technology. Our AI-powered natural language search tools use state-of-the-art deep learning models to greatly outperform existing keyword-based corporate search tools like Elasticsearch or Solr....