Staff Engineer.

About Mynt

Mynt is an all-in-one corporate card and spend management platform transforming business banking. By combining modern software, corporate cards, and payment infrastructure, we eliminate manual financial administration and give businesses full control over company spending.

Driven by strong momentum, Mynt has established itself as one of the fastest-growing fintechs in the Nordics. Backed by top investors and recent funding, we continue to scale rapidly across existing and new markets.

As a tech-first, product-led company, we empower teams to solve complex problems and build high-value solutions. Today, Mynt is a licensed e-money institution, card issuer, and payment processor under the Swedish Financial Supervisory Authority.

Through strategic partnerships across banking, ERP, fleet, and mobility—including Fortnox and Nordea—our platform is embedded into the daily workflows of thousands of businesses across all Nordic markets.

Joining Mynt means joining an ambitious team building the future of business finance. With 110+ employees across Sweden, Finland, and Norway, we are entering an exciting phase of scale and international expansion.

About the Role
As a Backend Staff Engineer, you are part of our 40+ engineering organization. You will lead the re-architecture of our Expense system, which sits at the core of Mynt's product line. Many teams build customer-facing products on top of it, which makes clear API contracts and scalability critical. As our product matures and we move into new markets, the requirements are growing. It needs to support advanced features like mileage, reimbursements, agentic workflows and custom spend rules, and adapt to what we have not seen yet. You will do this in the Expense team and in close collaboration with its stakeholders.

We are looking for an experienced engineer who is passionate about tackling architectural challenges and managing work that spans multiple teams and highly complex domains. You enjoy working in an entrepreneurial environment where you will influence both the product and the company’s direction. Together with Product Managers and other functions, you set long-term goals and break them down into manageable parts. Alongside your peers in similar roles, you identify requirements and set the technical roadmap. You are a strong and driven collaborator and can mentor junior colleagues. Throughout, you deliver user value and robust solutions iteratively.

We believe in teams with high responsibility, autonomy and clear missions. Our development process is rooted in agile principles, clean architecture, and CI/CD. Automatic testing, TDD, daily deployments and automation are integral parts of how we ensure quality and maintain speed. We operate in the financial sector under an EMI license, which sets a high bar for quality and compliance. In this environment, you will lead architectural decisions, contribute to product design and guide software development.

Qualifications

• Bachelor’s degree in Engineering, Computer Science, or equivalent experience

• A high level of experience in backend development using Java, with a proven track record of building robust, long-term software solutions with very high availability and accuracy demands.

• Experience with MongoDB, MySQL, Redis, AWS, Docker, and CircleCI is a strong plus.

• You have a genuine curiosity for growing as an engineer and leader, and take real pride in your craft, consistently delivering robust, enterprise-grade solutions and architectures.

• You have a team-first approach and enjoy solving problems both in a multidisciplinary team setting and across multiple teams.

• You have a learning and ever improving mindset and a will to share your insights and improve your surroundings.

• You are proactive in identifying and solving problems that arise when developing our products.

• Fluent in Swedish and English

What we can offer you

• Be part of an amazing team in a fast-growing scale-up.

• Enjoy a flexible working environment with a great office location in central Stockholm.

• Shape your own development and responsibilities based on your passion and interest.

• Recurring social and team activities, wellness allowance, 30 vacation days and competitive salary.

The position will be filled as soon as we find a suitable candidate. Please reach out to us as soon as possible if you believe this for you!