Software Developer and Metadata Engineer Consultant for Open Code Infrastructure (OCI)

The consultant will carry out full-stack development and operations activities across the Open Code Infrastructure (OCI) platform, including feature development, bug fixes, dual-compatible metadata engineering, and documentation. The role supports the ITU/WHO Focus Group on AI for Health specifications and contributes to open standards for dataset metadata interoperability.

Responsibilities

• Implement new features and enhancements on both platforms as prioritized by the project team, covering backend logic, REST APIs, frontend interfaces, and database changes.
• Diagnose and resolve reported bugs and issues across the full stack.
• Ensure new code follows existing architectural patterns and coding standards of each platform.
• Implement and test code changes in the Croissant repository to address dual-compatibility blockers with Bioschemas.
• Create validator or linter rules or plugins that check both Croissant and Bioschemas expectations.
• Add unit and integration tests, fixtures, and CI hooks to prevent regressions on dual compatibility.
• Prepare minimal examples and documentation demonstrating successful dual validation (Croissant parsers + Bioschemas FAIR checks).
• Open PRs and upstream issues to the Croissant repository or maintain a clean BioCroissant extension package if upstream changes are not feasible.
• Maintain technical documentation covering architecture, deployment procedures, and API specifications.
• Document operational procedures and troubleshooting guides to facilitate knowledge transfer.
• Deploy working features and bug fixes to production on a regular basis.
• Deliver technical documentation for the OCI platform.
• Compile Croissant pull requests, validator rules, or a BioCroissant extension package achieving dual Croissant/Bioschemas compatibility, with passing tests and worked examples.

Requirements

• University degree in computer science, software engineering, information technology, or a related field OR education from a reputed college of advanced education, with a diploma of equivalent standard to that of a university degree in one of the fields above.
• At least three (3) years of progressively responsible experience in software development and documentation for the relevant technical areas.
• Experience in full-stack development with TypeScript on both ends — Node.js services (NestJS or comparable) and a modern React framework.
• Experience with JSON / JSON-LD, schemas, and validation (e.g., Zod, JSON Schema, Croissant / BIOCroissant).
• Experience with the following technical environment: OCI Platform (target stack), Backend: Node.js 24 LTS, TypeScript 6, NestJS 11 (modular monolith), Prisma 7, BullMQ, Eval sandbox: Python 3.x for sandboxed runner executing participant Docker images, Frontend: Next.js 16 (App Router, React Server Components, Turbopack), React 18+, Tailwind v4, shadcn/ui, Database: PostgreSQL 16 (AWS Aurora Serverless v2), Prisma migrations, multi-schema, Auth: AWS Cognito (OIDC/OAuth2), aws-jwt-verify, MFA for admin/regulator/supervisor roles, Infrastructure: AWS CDK (TypeScript), ECS Fargate, ALB, S3, SQS, ECR, KMS, WAFv2, Secrets Manager, CI/CD: GitHub Actions with OIDC role assumption (no static AWS keys); per-env deploy pipelines, Observability: CloudWatch, AWS X-Ray, OpenTelemetry, pino structured logging, Container Insights, Security tooling: Trivy, Gitleaks, CycloneDX SBOM in every PR; distroless Node base images, API contracts: OpenAPI 3.1 via NestJS Swagger module; Zod schemas shared FE/BE via @oci/shared-types, Testing: Vitest 4 (unit + integration with Testcontainers), Playwright 1.59 (E2E + a11y).
• Proficiency with modern React frameworks, ideally Next.js (App Router / React Server Components).
• Strong TypeScript fundamentals; strict mode, generics, discriminated unions.
• Working knowledge of PostgreSQL and an ORM/query builder such as Prisma.
• Familiarity with RESTful API design and OpenAPI 3.x specifications.
• Coding skills in Python for the evaluation sandbox runner, validators, parsers, and tooling.
• Familiarity with AWS primitives (ECS, S3, Cognito, RDS/Aurora, IAM) and infrastructure-as-code (AWS CDK preferred).
• Experience with CI/CD pipelines (GitHub Actions) and secure cloud deploy patterns (OIDC, least-privilege IAM).
• Ability to read an open-source codebase, opening issues / pull requests, and responding to code reviews.
• Knowledge of FAIR principles and data interoperability concepts; exposure to Croissant / ML metadata schemas is a plus.
• Knowledge of English at advanced level. Knowledge of another official language of the Union (Arabic, Chinese, French, Russian, Spanish) would be an advantage.

Skills

• Software Development
• Full Stack Development
• TypeScript
• Node.js
• NestJS
• React
• JSON
• JSON-LD
• Schema Validation
• Zod
• JSON Schema
• Prisma ORM
• BullMQ
• Python Programming
• Next.js
• TailwindCSS
• PostgreSQL
• AWS Cognito
• AWS CDK
• ECS Fargate
• S3
• SQS
• ECR
• KMS
• WAFv2
• Secrets Manager
• GitHub Actions
• CI/CD Pipelines
• OpenAPI 3.1
• RESTful APIs
• CloudWatch
• AWS X-Ray
• OpenTelemetry
• Vitest Testing
• Playwright Testing
• Docker Containers
• Containerization Technologies
• Security Tooling
• Trivy
• Gitleaks
• CycloneDX
• API Documentation
• FAIR Principles
• Metadata Engineering
• Open-source Contribution

Languages

English