Helsinki, Uusimaa, Finland · Hybrid
$4k–$5k/mo
Hion We at Hion are looking to create a measurable positive impact on the world around us – not just by optimizing the digital experiences for our customers, but by taking the extra mile to create more sustainable soluti…
Skills: TypeScript, React, React Native, Node.js, Next.js
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Develop and optimize mobile and web applications using a full-stack JavaScript tech stack. Take responsibility for architectural decisions, ensure technical project success, and mentor other developers.
Strong experience in modern JavaScript, TypeScript, and full-stack development is required. Candidates must be fluent in both Finnish and English and possess strong collaboration skills for client-facing work.
We at Hion are looking to create a measurable positive impact on the world around us – not just by optimizing the digital experiences for our customers, but by taking the extra mile to create more sustainable solutions and enable success for both our customers and Hionians. We are a software company that gives a damn – about our customers, our Hionians, and the world around us.
With almost 40 experts onboard, we specialize in designing, building, and continuously developing the digital customer experience touchpoints for our clients: websites, mobile applications, and eCommerce solutions. Our design-led approach combined with the technical architecture we create provides the foundation for the outstanding digital experiences we aim to deliver.
As a Senior Software Developer, you enjoy solving challenges and working in an agile environment. Our projects offer a healthy balance of both worlds. You'll get to build brand new digital services from scratch using the latest tech stack, as well as continuously modernize, maintain, and scale existing solutions for our long-term clients. We hope that you have strong experience in JavaScript and full stack development and are eager to share your knowledge with fellow developers.
Your daily work consists of project-based collaboration with skilled developers, project managers, and designers, while also working directly with clients to understand their needs and goals. Our project teams are typically compact and agile. Usually consisting of a designer, 1–2 developers, a project manager or CSM. In this role, you will develop and optimize mobile applications, utilizing both front-end and back-end technologies such as TypeScript, React, React Native, Next.js, and Node.js. AI-assisted programming is part of your daily work, and you want to develop yourself and make use of different techniques in working with AI.
As a senior developer, you ensure the technical success of projects, understand the full project scope, and take responsibility for architecture decisions as well as supporting other developers and actively participate in quality assurance. Together with the project team, you understand the client’s objectives and communicate directly with them. While our organization is self-directed, we follow clear processes around technical implementation, quality evaluation, and code reviews. These reviews are carried out by our most skilled developers – and you could be one of them now or in the future.
💰Salary range: 4000–5000€, depending on your experience and skills.
You have strong experience in modern JavaScript and full stack development, particularly with TypeScript, React, React Native, and Node.js. You understand how to build high-quality, scalable digital services across both mobile and web platforms.
You are experienced with some or all of the following:
Frontend development: React, TypeScript, responsive user interfaces, accessibility (WCAG 2.2 AA), TailwindCSS, and component libraries
Mobile & PWA development: React Native, mobile-specific capabilities (e.g. push notifications, OTA updates, NFC), Progressive Web App solutions, and offline functionality
Backend development: Node.js, GraphQL, and frameworks such as NestJS or Fastify
Databases & integrations: e.g. MySQL, PostgreSQL, MongoDB, Redis, as well as RESTful APIs and HTTP fundamentals
Quality assurance & DevOps: testing (e.g. Jest, Playwright, Cypress), Git, CI/CD, and cloud environments such as Google Cloud
Security: modern application development best practices, including JWT authentication, API key management, and access restrictions
Beyond technical expertise, you are a strong collaborator: you work effectively with clients, partners, and cross-functional stakeholders, communicate proactively within project teams, and take a practical approach to solution design. You are able to estimate implementation effort and technical impact, and you maintain documentation effectively (e.g. Jira, Confluence, GitHub, Azure DevOps).
You enjoy sharing knowledge, mentoring other developers, and building high-quality solutions together. You are self-directed, solution-oriented, and adapt quickly to changing situations.
A relevant higher education degree is considered an advantage. You work fluently in both Finnish and English.
Our values – Committed, Inspirational, and Sustainable – are reflected in everything we do:
Committed: We are committed to finding the best solutions for our customers while enjoying our work and having fun.
Inspirational: At Hion, we gain inspiration from our curious and caring community. We are honest and down-to-earth, and determined in everything we do.
Sustainable: We care – our way of working is sustainable, ethical, and transparent.
At Hion, you’ll be surrounded by a diverse, caring group of colleagues and lively humor. We value diversity and the richness it brings to our community: we invest in creating a more diverse and inclusive community through our internal DEIB taskforce and training the members of our community.
Naturally, the commitment to promoting a more sustainable world is also at the heart of our existence. Ambitious ESG goals guide our work, which is also evident in our customer relationships.
Moreover, we offer you the opportunity to have an impact: on your own role, Hion as a company, and the growth journey we are creating. While we are professionally determined, we remember to have fun along the way. Most importantly, we want to stay human and create an environment where everybody can thrive – we give a damn about our Hionians, and our actions reflect this commitment.
Our modern office space in Helsinki provides an ideal working environment while our flexible remote work possibilities and arrangements support well-being and work-life balance.
Think you’d thrive at Hion? If this sounds like the right opportunity, we’d love to hear from you! To apply, submit your application through our recruitment system by June 9th.
Our recruitment process follows these steps:
Interview with the HR Business Partner
Interview with an expert and business lead
Reference check (contacting 2 provided references by phone)
If you have any questions regarding the role, please feel free to reach out to our HR Business Partner Mariia, phone +358442577800 ([email protected]).
Rohkea ohjelmistoyritys, joka välittää aidosti.
Olemme ohjelmistoyritys, joka välittää aidosti.
Offices: Siltasaarenkatu 10, Helsinki, Uusimaa 00530, FI
Rohkea ohjelmistoyritys, joka välittää aidosti.
Olemme ohjelmistoyritys, joka välittää aidosti.
Offices: Siltasaarenkatu 10, Helsinki, Uusimaa 00530, FI
