Senior Software Engineer; Node.js​/React

Overview

The company and our mission: Zartis is a digital solutions provider working across technology strategy, software engineering, and product development. We partner with firms across financial services, Med Tech, media, logistics technology, renewable energy, EdTech, e-commerce, and more. Our engineering hubs in EMEA and LATAM deliver 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.

The project: Our teammates 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 the 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 improve 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 Type Script, Node.js, and either React or React Native, as well as database technologies such as Postgre
  
  SQL 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.

• 100% Remote Work.
• WFH allowance:
  Monthly payment as financial support for remote working.
• Training:
  Tech training at Zartis with time allocated during the week for options such as online courses (e.g., Pluralsight, Educative.io), English classes, books, conferences, and events.
• Mentoring Program:
  Opportunity to become a mentor or receive mentorship.
• Career Growth:
  Career development program with 360º feedback to support progression.
• Zartis Wellbeing Hub (Kara Connect):
  Access to sessions with specialists including mental health professionals, nutritionists, physiotherapists, fitness coaches, and webinars.
• Flexible Working schedule.
• Multicultural working environment with tech events, webinars, and online team-building activities.