Senior Full Stack Web Engineer - Crypto

Posted about 2 months agoViewed
BrusselsFull-TimeCrypto, Financial Services
Company:Keyrock
Location:Brussels
Languages:English
Seniority level:Senior
Skills:
AWSBackend DevelopmentDockerSoftware DevelopmentSQLCloud ComputingFrontend DevelopmentFull Stack DevelopmentGCPGitKubernetesReact.jsSoftware ArchitectureUI DesignUser Experience DesignVue.JsAzureNosqlReactRustCI/CDRESTful APIsDevOpsMicroservicesCollaborationProblem SolvingData visualizationData modelingDebugging
Requirements:
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. 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 (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.
Responsibilities:
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.
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