Senior Full-Stack Software Engineer

We’re looking for talented, friendly and adaptable Full-stack Software Engineers to help fast-track the integration of AI within our products, both for internal and external use. In this role, you’ll join Treatwell ’s new AI Engineering team , where you’ll design and build AI-powered, full-stack solutions—everything from internal automation to customer-facing features. Your core mission will be to integrate intelligence into our ecosystem (linking platforms like Salesforce, Hubspot, Confluence and our own products) to streamline internal workflows and elevate the experience for every Treatwell customer. We are seeking a software engineer who is comfortable with working in a cross-functional Agile team, with proven experience in designing/building frontend and backend applications, continuously delivering clean, maintainable and well tested code. We want to do great work and to be known for it. As a full-stack engineer you will help the team to ensure they continuously deliver high quality code, so that they can meet and exceed their goals. You will collaborate with the other members of the team, contributing to build robust integrations with third party services. You will help the team to define and roll out an AI adoption strategy. You will play a crucial role in exploring, evaluating and integrating LLM and AI services/methodologies, adopting and orchestrating them in the team’s products. We don’t just ship features, we’re building a Europe-wide platform & team, and know we need to do great work to succeed. To achieve this, we need passionate people who love being challenged, learning new things, and growing with their team. You'll be responsible for: Design, develop, and maintain scalable services and applications in Node.js (TypeScript) . As a team, though, we are not tightly coupled to a specific programming language/eco-system, especially in the back-end. Therefore adaptability would be highly appreciated. Collaborate with various stakeholders: product managers, designers, and other engineers in an Agile Environment . Write clean, maintainable, and well-tested code following good Engineering Practises . Integrate and maintain robust connections with third-party APIs and services. Participate in code reviews, architectural decisions, and continuous improvement initiatives. Ensure performance, quality, and responsiveness of applications. You know good UX, visual and good technical design when you see it and how to ensure quality is embedded in the software development process. About you: Proven experience as a Software Engineer. Strong experience in back-end development with Node.js or a similar JavaScript runtime. Experience with other languages/frameworks on the Backend (e.g. Python - Java/SpringBoot) and on the Frontend (we mainly use React ) Solid understanding of RESTful API design, OAuth , and integrating third-party APIs. Excellent problem-solving and communication skills. Experience with TDD/BDD and writing test suites (e.g., using Jest, Cypress). Nice to have: Experience with AI services (e.g., OpenAI, Hugging Face, AWS Bedrock , vector databases). Familiarity with agile methodologies and DevOps best practices. Experience with LangChain, LLM orchestration , or building AI-powered features. CI/CD pipeline experience (we use Gitlab CI/CD). Familiarity with cloud platforms (especially AWS). About Treatwell Hi, we’re Treatwell . Nice to meet you. We’re a team of 700 passionate and brilliantly talented people across Europe. We’re the industry’s smartest salon management software, all connected to Europe’s leading bookings platform, working with over 50,000 salon partners across 13 countries, processing over 8 million bookings every month. And….breathe. But we’re not done yet. We’re on an exciting journey to digitally revolutionise the hair and beauty community. If this excites you, we might just have the role for you. We’ll treat you with: 28-days holiday, plus bank holidays Monthly 40 EUR Treatwell vouchers so you can treat yourself too Access to a dedicated mental health support platform 100% remote position with flexible working Equal Ops Treatwell is an ‘Open to All’ employer and warmly welcomes everybody to the team. We are committed to making reasonable adjustments to the recruitment process as required. Please add any adjustment requests to your application. Originally posted on Himalayas