Senior Software Developer

About the role

Join a fast‑growing Helsinki‑based scale‑up that leads the precious‑metals purchasing market across the Nordics, Europe and the USA. As a Senior Software Developer you will own security and data‑protection while building modern, mobile‑first web applications.

Key responsibilities

• Develop new features and integrations for internal apps using SvelteKit, Vercel, Supabase and PostgreSQL.
• Plan and manage country‑specific compliance and reporting requirements.
• Own day‑to‑day security: access control, secure handling of personal and financial data, and safe integration patterns.
• Contribute to secure architecture decisions, including threat modelling, testing, code review and dependency hygiene.
• Build and maintain integrations, monitor workflows, optimise data quality and ensure system reliability.

Required profile

• Proven track record building complex, mobile‑first web apps (Svelte/SvelteKit or similar).
• Strong experience in backend and/or frontend development (Node.js, TypeScript, React, Vue or similar).
• Solid database and integration skills (PostgreSQL, REST APIs, row‑level security a plus).
• Security‑first mindset with experience handling personal, payment or regulated data.
• Fluent English; Finnish or other Nordic languages are a plus.

Required skills

• SvelteKit / Svelte
• Vercel
• Supabase
• PostgreSQL
• Node.js
• TypeScript
• REST APIs

What we offer

• Agile, tight‑knit team where ideas matter.
• Responsibility and freedom to influence architecture, technologies and security practices.
• Hybrid work model with a few days per week in the Helsinki (Käpylä) office.
• Competitive salary, company bonus scheme and unlimited AI tokens.
• Career growth in a rapidly scaling company.