Senior Software Developer (Data)

Are you looking to impact and be part of something special, such as shaping the future of healthcare?  

Are you passionate about using your skills to develop tools that positively affect both providers and patients? Are you excited about the potential of turning data into innovative, actionable experiences? Sound like you? Keep reading. 

At Semble, we are on a mission to enable health professionals to amplify their impact. We improve the way healthcare is delivered to millions of people by providing doctors and their teams with powerful, innovative, intuitive, and secure software. Our cloud-based clinical system is already used by thousands of clinicians, making their lives easier and saving them money, while structuring their health data to help research.   

We are a passionate and driven team, proud to unite under strong cultural drivers: 

• Impact - We do work that matters. 

• Collaboration – We are in it together. 

• Human touch – We care deeply. 

This role can be fully remote in the UK and EU (with occasional travel to our London office) within +/- 2 hours of the GMT time zone. We are unfortunately not able to consider candidates located outside these locations and time zones at this stage.  

What you will be doing 

We recognise the immense value of data and have worked diligently to establish a powerful, state-of-the-art data platform. Now, we’re ready to build around it — transforming that foundation into compelling, data-driven features that will enable our customers to unlock deeper insights and drive meaningful outcomes. As the first developer focused on integrating data features into our application, you’ll play a key role in designing innovative solutions that bring our data to life. This position will require both creativity and technical expertise, with a deep understanding of front-end and back-end development. 

Your primary responsibility will be to work within the app code to deliver these features to end users. Additionally, you will work within the data development team to design and build a robust data API, enabling the smooth integration of data related workloads and app features. 

You will: 

• Design and develop solutions as part of an agile team focused on building new, data-driven features. 

• Combine user needs with business requirements to create technically feasible solutions. 

• Collaborate with the data team to design a Python-based data API that interacts with the app, ensuring data tasks are handled efficiently and effectively. 

• Work alongside designers, product owners and other team members to identify technical challenges early on and plan new solutions. 

• Work across the entire application stack, with a focus on integrating the data API and presenting features built from different data technology. 

• Use tools like ReactJS, NodeJS, AWS CDK, and TypeScript to deliver interactive and user-friendly features, while help in developing and supporting data API to ensure smooth backend operations. 

• Advocate for recognised best practices based on clean, testable and maintainable code. 

• Participate in code reviews to ensure code quality and dissemination of knowledge. 

• Help shape the data technology roadmap for how we deliver data-driven features and ensure that we keep pace with evolving data technologies. 

What we are looking for 

At a Senior level at Semble, we will expect you to be mostly autonomous in your scope and to own and solve complex tasks or lead projects independently. You will work with peers from different functions and have an impact across department. You may be in a mentoring role for more junior team members and should be able to influence effectively and lead by example throughout the company  

We are looking for a senior software developer who has a passion for creating data-driven solutions and can help bridge the gap between our robust data platform and our application. You have a strong understanding of both front-end and back-end development, with a specific focus on delivering innovative data features. You are also eager to explore advanced technologies and to design new data-powered applications. 

• 5+ years’ professional experience developing mobile-ready websites using ReactJS (in Typescript a plus). 

• Hands-on experience developing scalable back-end applications using NodeJS. 

• Experience working in Python based APIs is highly desirable. 

• Experience with design patterns, clean code, automated testing (unit, integration, E2E) using Jest & Cypress, and CI/CD. 

• Knowledge using NoSQL databases - familiarity with data technologies (e.g., Spark, relational databases, ML) is a bonus. 

• Ability to work with and design APIs to integrate data workflows into customer-facing features. 

• A proactive mindset with a keen interest in learning about evolving data technologies and adapting these into practical solutions for our customers. 

• Comfortable with cloud-based applications, particularly in AWS. 

• Interest in Infrastructure as Code with real-world experience a plus 

• Strong written and verbal communication skills, with the ability to share knowledge and mentor team members. 

What you’ll get in return 

• The great feeling coming with knowing you do something that matters: shaping the future of healthcare! 

• £80-90k package (based on your experience and the value you can bring) 

• Autonomy and ownership – we’ll set the vision and share the context, then we trust you to run with things – that’s the reason we hire you! 

• 36 days off: 25 holidays +bank holidays +3 extra days (birthday and ‘feel good’ days) - that we will expect you to actually take so you can recharge and rest. 

• Company Equity - We appreciate and recognise all our employees’ contributions, so everyone is eligible for Semble share options! 

• Private Health Insurance – covering physical and mental health, as well as dental and optical! 

• Hybrid & flexible work environment – work from anywhere in the UK, with also some flexibility to work across Europe. You decide how much or how little you go to the office. 

• Get the tech you need - You will get the latest MacBook and take your pick across a wide range of equipment to set up your home office ergonomically. 

• Work alongside an inspiring team – our two founders have started Semble after a successful startup exit, and your future colleagues are all knowledgeable and innovators in their field. 

• Fantastic office space in Central London, right outside Monument - with a roof terrace, weekly animations, loads of natural light, and cute doggies! 

• The usual free bits coming with nice offices (barista coffee, tea, fruits, happy hours and activities...). 

We welcome applications from people of all backgrounds and all walks of life, including any typically underrepresented groups in the technology industry. We also encourage applications from disabled and neurodiverse candidates, so if there are any adjustments we can make to support you throughout the recruitment process, please do let us know. 

Compensation£80,000-90,000