Senior Backend Engineer

Senior Backend Engineer Apply now Are you a skilled Backend Developer (Node.js) with a passion for scalable systems and robust solutions? Do you want to be a key player in a team building the next generation of digital services? Then this might be your next challenge! About Us We are group.one, a fast-growing European tech company empowering over 2 million small and medium-sized businesses to succeed online. With a 1,500-strong team across 20 offices, group.one delivers an integrated suite of SaaS products—ranging from AI-powered website builders and WordPress hosting to marketing, e-commerce, and compliance tools. Our mission is simple: to help entrepreneurs win digitally with easy-to-use products, scalable cloud infrastructure, and local expertise. About the Team We believe in modern technology, agile workflows, and a culture where autonomy, innovation, and personal connection are at the core. Our multi-cultural, English-speaking team is a rapidly growing group of passionate engineers, working closely with Product, UI, UX, and QA to build next-generation AI and WordPress solutions. We are developing Flowpilot.one , a conversational AI-based website builder for WordPress that enables anyone to create a professional site through natural dialogue — launching globally across our brands. In parallel, we build and maintain WP.one , a powerful managed WordPress hosting platform designed for agencies and developers. Our team currently includes four local engineers (growing to eight), a Support Engineer in Finland, UI and UX designers based in Copenhagen, and QA support from India — all collaborating tightly to deliver high-quality, scalable products that redefine how websites are created and managed. About the Role We are looking for a Backend Developer fluent with NodeJS (TypeScript) and understanding of NestJS with an interest in AI frameworks (e.g. LangChain) and agentic systems. As a Backend Developer, you’ll work on projects that integrate conversational AI into website generation, editing, and connectivity with internal and external systems and plugins. You’ll also have the opportunity to experiment and expand your expertise by building AI-driven solutions for various use cases defined by the team. This is a remote position, with travel to Finland required approximately once every 1–2 months. What You’ll Do Build and evolve our AI-powered backend systems that connect conversational AI with website generation, editing, and plugin integrations. Design and implement scalable APIs and microservices using Node.js (NestJS) and modern backend patterns. Develop robust data flows between WordPress, internal systems, and third-party APIs, ensuring reliability and performance at scale. Collaborate closely with the team to deliver smooth, human-like user experiences through seamless backend logic. Continuously improve performance, observability, and security , leveraging monitoring tools and best DevOps practices. Experiment, prototype, and learn — from exploring new AI frameworks to testing emerging backend technologies. Contribute to our engineering culture , sharing insights, best practices, and ideas that push our technical boundaries forward. Who You Are You are a skilled Backend Developer (Node.js) with a passion for building scalable systems and delivering robust, high-quality solutions. You’re deeply curious and driven to stay ahead of the curve, continuously exploring new frameworks and technologies in the rapidly evolving AI landscape. You thrive on learning, experimenting, and turning innovative ideas into reliable, real-world systems, and you take pride in writing clean, maintainable code. You’re eager to be a key contributor in a team shaping the next generation of digital services, where innovation, collaboration, and autonomy are at the core. You might be a good fit if you You have a strong interest in backend systems and API development. You have solid foundational coding skills in TypeScript (Node.js, NestJS) You’re familiar with relational databases (PostgreSQL) You’re curious about RESTful API design , event-driven architecture , and asynchronous programming . You take a user-centric approach to development, aiming for solutions that are robust, scalable, and intuitive . You thrive in an agile, fast-paced, collaborative environment and enjoy working closely with cross-functional teams. You’re eager to learn beyond your core responsibilities and take ownership of your professional growth. You want hands-on exposure to cutting-edge technologies and their real-world applications. You care deeply about code quality, maintainability , and the impact your work has on users. You’re flexible and adaptable , ready to learn new technologies and approaches as needed. Strong candidates may also have experience with AI/ML systems and understanding their capabilities and potential integrations. Job queues and message brokers (RabbitMQ, BullMQ) for asynchronous task processing. WordPress-knowledge Docker/Kubernetes, containerisation CI/CD pipelines and DevOps practices. Monitoring and observability tools (Prometheus, Grafana, Loki). Language Working language in English, multi-cultural team Why Choose Us? The opportunity to work with the latest technology and influence architecture A creative and innovative work environment with skilled colleagues Flexible working hours, hybrid office/remote setup (one day at the office per week) Competitive benefits Great opportunities for personal and professional growth Application process Fill in your application and add a link to your GitHub project which you would like to present to us. We will provide selected applicants with a coding challenge. First interview, where the applicant presents the chosen project and answers technical questions. Second interview Offer and onboarding. About us group.one is a leading European provider of online presence, cloud hosting, and digital marketing services. Over 2 million customers trust us with their online success. Our global team consists of 1 500+ employees operating from nearly 20 locations across 15 countries, with our headquarters in Sweden. Thanks to the support of our partners Cinven and Ontario Teachers' Pension Plan , we are steadily expanding the group's service portfolio and geographical footprint. When you join group.one , you become a part of a global network that values collaboration, growth, and excellence. Join us in creating online success stories! We are committed to an inclusive and safe environment, free from discrimination and harassment. We welcome talent in all its diversity. Your gender, background, age, beliefs, or personal story do not define your opportunities here - what matters to us is mutual respect, personal appreciation, and creating a workplace where motivation and collaboration thrive. We believe in supporting your personal and professional growth, recognising you as both an individual and a valued team member. We want to continue to grow with you and why we look forward to getting to know you. Locations Denmark , Finland , Germany, Dortmund , Netherlands, Amsterdam Remote status Hybrid Employment type Full-time About group.one group.one is a leading European provider of online presence, cloud hosting, and digital marketing services. Over 2 million customers trust us with their online success. Our global team consists of 1 500+ employees operating from nearly 20 locations across 15 countries, with our headquarters in Sweden. Thanks to the support of our partners Cinven and Ontario Teachers' Pension Plan , we are steadily expanding the group's service portfolio and geographical footprint.