Senior Full Stack Web Engineer

Keyrock

Keyrock City Of London, England, United Kingdom

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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.

• 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, Web Assembly, and modern API frameworks.

• Proven experience building full stack web applications with strong command of both front‑end and back‑end principles.
• Proficiency in modern front‑end frameworks (Vue, React or similar) and design systems or component libraries such as Shadcn.
• Experience developing robust back‑end services, ideally using Rust, or familiarity with typed back‑end languages.
• Solid understanding of HTTP, RESTful API design, and performance optimisation in web contexts.
• Hands‑on experience with relational and/or No
  
  SQL 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.

• 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 (D3.js, 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 (Git Lab 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.

• 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.

Mid‑Senior level

Full‑time

Engineering and Information Technology