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Senior Fullstack Developer

1 week ago

Copenhagen, Copenhagen, Denmark Certainly Full time
About Us

Certainly is a cutting-edge Conversational AI Platform designed for ecommerce and customer service. Our innovative platform builds tailored AI conversational chatbots to meet complex customer service needs across multiple domains and languages.

We are a dynamic team of around 20 professionals working in a hybrid setup, with management based in Copenhagen and product development spanning across Europe. With extensive experience in Conversational AI, we strive to stay at the forefront of the market, leveraging our expertise to deliver top-notch products and services. Our ChatBots are trusted by prominent 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 spearheading the design, development, and maintenance of our service platform built with Next.js and React. You will work on developing using the latest frameworks within Frontend development.

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

Key Responsibilities
  • Spearhead 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 enhance 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 and Qualifications

We are looking for a professional who possesses experience and proficiency in most of the following areas:

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.
  • Familiarity 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.
Benefits
  • 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.