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The Team
You’ll join a small, fast-moving team of four engineers led by our CTO, Sara, partnering closely with product and domain experts to ship secure, reliable software in healthcare. We’re expanding to build new features and systems across our platform, including GRIP, ELaiGIBLE, and new products. We’re looking for builders who want meaningful ownership as we scale.
What You’ll Do
Ship end-to-end features across frontend and backend.
Design and implement REST APIs, integrate with data stores and internal services.
Build reliable data flows and background jobs, focus on performance and monitoring.
Contribute to event-driven components and partner integrations.
Uphold security and privacy by default; collaborate with product/security on least-privilege access and sane defaults.
Own the lifecycle: clarify scope, design, implement, monitor, iterate.
What You Bring
Experience
BSc/MSc in CS/SE (3+ years building production web software with ownership) or 5+ years equivalent experience.
Comfortable working across the stack (frontend + backend), with deeper strength in at least one area.
Solid grasp of common software design patterns and their trade-offs.
Solid understanding of client–server fundamentals, HTTP, and computer-network basics, familiarity with gRPC and WebSockets.
Frontend & Backend
Experience shipping with a modern SSR/front-end framework Next.js/React.js (or equivalent e.g., Nuxt.js/Vue.js).
Hands-on with a Node.js/Bun backend framework NestJS (or equivalent e.g., Express, or Fastify), with knowledge of routing, CORS, validation, and testing.
Proficient in JavaScript/TypeScript, HTML/CSS (with some knowledge of Tailwind CSS), and comfortable in Python.
Proficient with software testing concepts (e.g., test types, mocking), and can apply these concepts with testing frameworks like Jest, Cypress, Playwright, PyTest, etc.
Practical experience designing and consuming APIs; understanding versioning, pagination, and error contracts.
Hands-on with authentication & authorization (SSO/OIDC/OAuth2), session/JWT handling, and role/permission models (RBAC/ABAC).
Databases
Experience with both relational (e.g., PostgreSQL/MySQL) and document/NoSQL databases (e.g., MongoDB), including indexing and data modeling trade-offs.
Systems
Experience with at least one major public cloud (AWS, Azure, or GCP).
Containers (e.g., Docker, Podman).
CI/CD (e.g., GitHub Actions, GitLab CI) with automated pipelines.
Baseline observability skills (logging/metrics, basic dashboards) and performance-minded development.
Soft-skills
Ownership & initiative: You identify problems, propose pragmatic solutions, and drive them to completion.
Communication: Clear, direct, and respectful (written and verbal) with a bias to clarify scope and surface risks early.
Collaboration: Works well with product, design, and data/security partners; gives and receives feedback constructively.
Judgment: Balances speed and quality; knows when to iterate vs. when to harden.
Reliability: Transparent about blockers; follows through on commitments.
Learning mindset: Curious, reflective, and comfortable stepping outside your comfort zone.
Nice-to-haves
Working knowledge of at least one compiled language (e.g., Go, C#, C++, Rust, or Java).
Exposure to LLM agentic systems with their components (e.g., vector databases, retrieval/RAG, MCP, orchestration frameworks, knowledge graphs).
Comfort with infrastructure/architecture topics (scalability, resiliency, security).
Knowledge of Infrastructure-as-Code tools (e.g., Terraform, OpenTofu).
Experience implementing observability and monitoring (metrics, logs, traces, alerting).
Interest in self-hosting and developer tooling; ability to evaluate and operate open-source systems.
About OASYS NOW
OASYS NOW is building a privacy-by-design, AI-native health data platform that helps hospitals, research organizations, and patients unlock the value of real-world health data securely and compliantly. Recognized across Europe for both innovation and privacy, winning the Slush 100 (Nov 2024), European AI Cybersecurity Award, the Netherlands Privacy Award, Women in AI Award, and Forbes 30 Under 30 Europe – Health & Life Sciences. Our operations meet ISO 27001 and NEN 7510 standards.
Why OASYS NOW
Mission with real-world impact in healthcare and clinical research.
Autonomy and high ownership in a fast-moving, supportive team.
Access to modern tooling and business subscriptions to leading AI platforms.
Growth opportunities will arise as we scale, and your work will be visible and meaningful.
If this role interests you, please send us your CV, even if you do not meet all the requirements. We are seeking passionate and motivated individuals. For any questions, contact us at engineeringcareers@oasysnow.com.
Website: OASYS NOW: EU's first AI-powered Patient Screening for Clinical Trials
