Senior Software Engineer (Node.js/React)

Zartis is a digital solutions provider working across technology strategy, software engineering, and product development.

We partner with firms across financial services, MedTech, media, logistics technology, renewable energy, EdTech, e-commerce, and more. Our engineering hubs in EMEA and LATAM are full of talented professionals delivering business success and digital improvement across application development, software architecture, CI/CD, business intelligence, QA automation, and new technology integrations.

We are looking for a Senior Software Engineer to work on a project in the digital mental health sector.

Our teammates are talented people that come from a variety of backgrounds. We’re committed to building an inclusive culture based on trust and innovation.

You will be part of a distributed team revolutionising digital mental health care, creating the UK’s largest platform that supports and empowers young people with their mental health. As a Senior Software Engineer,  you will help set the technical direction and build reliable, scalable systems that guide young people to the right help.

- Design, build, and operate a suite of Node.js backend services, React-based web apps, React Native mobile and web experiences that form the backbone of their platform.

- Take end-to-end ownership of features, from idea through to production, with a strong sense of accountability and user impact.

- Ensure the impact of a legacy platform through proactive maintenance, strategic incremental enhancements and high-quality technical support.

- Contribute to system design and architectural evolution.

- Lead by example in trunk-based development, automated testing, CI/CD, and infrastructure-as-code principles.

- Take ownership of performance, resilience, observability, maintainability, security, and accessibility.

- Actively collaborate across disciplines and mentor colleagues through pairing, code reviews, and knowledge-sharing.

- Drive a shared understanding of user needs, commercial priorities, and how technical decisions influence business outcomes.

- Participate in the out-of-hours on-call rota and improving system reliability and incident response processes.

- Continuously improve the systems you work on, applying a thoughtful and pragmatic approach to technical challenges.

- Stay current with industry best practices in engineering, CI/CD, and architecture.

- At least 3+ years of hands-on experience in full-stack software development in a product-oriented environment.

- Proficiency in TypeScript, Node.js, and either React or React Native, as well as database technologies such as PostgreSQL and experience in delivering a web or native mobile application.

- Solid understanding of modern system architecture and the ability to contribute to its evolution.

- Commitment to quality, with experience shipping maintainable, scalable, and well-tested code.

- Ownership mentality with a focus on pragmatic delivery and continuous improvement.

- Skilled in agile practices, data-informed decision-making, and building reliability.

- Excellent communication and collaboration skills, including mentoring and inspiring peers, and building great relationships across disciplines.

- Deep experience with React and React Native in production environments.

- Experience operating production systems and improving them through observability, testing, and thoughtful design.

- A track record of delivering product improvements that tie into measurable business and user outcomes.

- Familiarity with cross-platform design, mobile/web accessibility, and monorepos.

- Expertise in trunk-based development, test automation and infrastructure as code.

- Experience with scalable system design and architecture patterns.

- Exposure to cloud-native technologies, particularly GCP or AWS with Kubernetes.

- WFH allowance: Monthly payment as financial support for remote working.

- Training: For Tech training at Zartis, you have time allocated during the week at your disposal. You can request from a variety of options, such as online courses (from Pluralsight and Educative.io, for example), English classes, books, conferences, and events.

- Mentoring Program: You can become a mentor in Zartis, receive mentorship, or both.

- Career Growth: We have established a career development program accessible for all employees with a 360º feedback that will help us to guide you in your career progression.

- Zartis Wellbeing Hub (Kara Connect): A platform that provides sessions with a range of specialists, including mental health professionals, nutritionists, physiotherapists, fitness coaches, and webinars with such professionals as well.

- Multicultural working environment: We organize tech events, webinars, parties, and activities to do online team-building games and contests.