Senior Software Engineer (React / Node.js) - Zartis - Etätyö - Globaali

Zartis is a global AI transformation and technology consulting partner where talented engineers and technologists work on cutting edge innovation. We partner with ambitious organizations to design, build, and scale technology solutions that deliver real impact. Our teams bring deep expertise in AI driven platforms, secure API architectures, and cloud native engineering. You will work on meaningful projects that accelerate the adoption of advanced technologies, from strategy and discovery through to full product delivery, helping turn complex challenges into measurable outcomes. With engineering hubs across EMEA and LATAM, and long term partnerships in financial services, healthcare and life sciences, and energy and climate, we offer opportunities to work on projects that truly matter. Here, you will not just build technology, you will drive business impact and grow your career alongside industry leaders. We are looking for a Senior Software Engineer to work on a project in the green energy industry. The project: 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 developing new technologies to solve real business problems. Our client has been empowering some of the biggest energy suppliers to better serve millions of customers and wants to power a world where net zero is within everyone’s reach, by building the platform that will accelerate a sustainable, affordable, and resilient energy transition. What you will do: Designing and delivering scalable frontend features using TypeScript and React for large-scale applications used by both customers and internal teams. Taking ownership of features from discovery through to release, contributing to architectural decisions and evolving patterns as the codebase grows. Building shared components and tooling while writing well-tested, high-quality code. Collaborating with product managers, designers, and backend engineers to shape intuitive user experiences on top of complex systems. Continuously improving performance, scalability, and overall quality across the platform. What you will bring: 5+ years of production experience building frontend applications with TypeScript and React. Hands-on experience with Node.js. A strong understanding of component architecture, state management, and patterns for scaling React applications. A track record of delivering meaningful features or systems with a degree of ownership. A focus on performance, reliability, and long-term maintainability in everything you build. Experience with end-to-end testing in modern frontend environments. The confidence to collaborate across disciplines and contribute to technical discussions. A genuine interest in solving real customer problems, not just shipping code. Nice to have: Experience with cloud technologies and infrastructure, ideally AWS. Familiarity with Monorepo tooling such as Nx or Turborepo. What we offer: 100% Remote Work WFH allowance: Monthly payment as financial support for remote working. 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. 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 or you can receive mentorship, or both. 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.