Senior Full Stack Web Engineer - Copenhagen, Capital Region of

About Keyrock · Since our beginnings in 2017, we've grown to be a leading change-maker in the digital asset space, renowned for our partnerships and innovation. · Today, we rock with over 200 team members around the world. Our diverse team hails from 42 nationalities, with backgr ...

Jobbeskrivelse

About Keyrock
Since our beginnings in 2017, we've grown to be a leading change-maker in the digital asset space, renowned for our partnerships and innovation.

Today, we rock with over 200 team members around the world. Our diverse team hails from 42 nationalities, with backgrounds ranging from DeFi natives to PhDs. Predominantly remote, we have hubs in London, Brussels, Singapore and Paris, and host regular online and offline hangouts to keep the crew tight.

We are trading on more than 80 exchanges, and working with a wide array of asset issuers. As a well-established market maker, our distinctive expertise led us to expand rapidly. Today, our services span market making, options trading, high-frequency trading, OTC, and DeFi trading desks as well as digital asset management. Keyrock is looking to expand and establish itself as a full-service financial institution through both organic innovation and inorganic growth.

But we're more than a service provider. We're an initiator. We're pioneers in adopting the Rust Development language for our algorithmic trading systems, and champions of its use in the industry. We support the growth of Web3 startups through our Accelerator Program. We upgrade ecosystems by injecting liquidity into promising DeFi, RWA, and NFT protocols. And we push the industry's progress with our research and governance initiatives.

At Keyrock, we're not just envisioning the future of digital assets. We're actively building it.

Mission statement
We are seeking a
Full Stack Web Engineer
with a strong sense of UI/UX design and a proven track record in the financial services industry. Experience in the crypto or digital asset domain is highly valued.

You will work across the entire technology stack -
from data models and APIs to interactive, high-performance interfaces
- building and refining products that deliver tangible business value. You are driven by a product mindset, validating ideas early and evolving them from functional to exceptional. You are language-agnostic, pragmatic in your technical choices, and unafraid to experiment when it serves the end user.

You excel in collaborative environments, take ownership of your work, and contribute to a culture of technical excellence through reviews, mentorship, and shared learning. If you combine creativity in front-end craft with a deep appreciation for backend reliability and data integrity, this role is designed for you.

Job Description

• Deliver end-to-end product features - from backend APIs and data models to engaging, responsive UI components.
• Review and validate scalable software architectures, ensuring maintainability, reliability, and secure integrations across all layers.
• Champion good engineering practices, including code reviews, automated testing, documentation, and CI/CD workflows.
• Optimise performance across the stack through effective debugging, profiling, and system tuning.
• Collaborate with product, and engineering teams to translate complex business and user requirements into elegant, performant solutions.
• Maintain consistent operational hygiene through clear documentation, smooth migrations, and predictable deployments.
• Explore and share emerging technologies, with particular interest in Rust, WebAssembly, and modern API frameworks.

Background And Experience

• Proven experience building full stack web applications with strong command of both frontend and backend principles.
• Proficiency in modern frontend frameworks (Vue, React or similar) and design systems or component libraries such as Shadcn.
• Experience developing robust backend services, ideally using Rust, or familiarity with typed backend languages
• Solid understanding of HTTP, RESTful API design, and performance optimisation in web contexts
• Hands-on experience with relational and/or NoSQL databases, schema design, and query optimisation.
• Familiarity with Git-based workflows, continuous integration, and automated testing practices.
• Strong debugging, problem-solving, and analytical skills.
• A product-oriented mindset - balancing quality, speed, and user impact effectively.
• Excellent collaboration and communication skills, with a proactive attitude toward improving systems and team dynamics.
• Product oriented mindset with the ability to focus on delivering value, validate early, and progressively refine solutions.

Preferred Qualifications

• Exposure to data-intensive, governance-driven, or fintech/crypto applications, and curiosity for Rust or distributed systems.
• Awareness of secure coding practices, authentication/authorisation models (OAuth2, OpenID Connect).
• Knowledge of data visualisation libraries , Recharts, or similar).
• Familiarity with observability stacks (Grafana, Prometheus, Loki, Faro, or Datadog) and comfort instrumenting metrics, logs, and traces.
• Ability to design applications with self-observability in mind (e.g., health endpoints, tracing IDs, telemetry propagation).
• Exposure to Kubernetes, containerised environments, and Helm-based deployments.
• Understanding of CI/CD pipelines (GitLab CI) and infrastructure-as-code workflows.
• Experience working in cloud-native environments (AWS, GCP, or Azure) and awareness of security-first design.
• Comfort working with financial datasets, trade logs, or analytics dashboards.
• Experience handling sensitive or regulated data, ideally in financial or crypto contexts.

Our recruitment philosophy

We value self-awareness and powerful communication skills in our recruitment process. We seek fiercely passionate people who understand themselves and their career goals. We're after those with the right skills and a conscious choice to join our field. The perfect fit? A crypto enthusiast who's driven, collaborative, acts with ownership and delivers solid, scalable outcomes.

Our offer

• A competitive salary package
• Autonomy in your time management thanks to flexible working hours and the opportunity to work remotely
• The freedom to create your own entrepreneurial experience by being part of a team of people in search of excellence

As an employer we are committed to building a positive and collaborative work environment. We welcome employees of all backgrounds, and hire, reward and promote entirely based on merit and performance.

Due to the nature of our business and external requirements, we perform background checks on all potential employees, passing which is a prerequisite to join Keyrock.