RQx Sr. Software Developer - Full Stack; JavaScript, Java, Python, API

Security Level: CRJMC

• Develop and extend open source Open Wallet Foundation ACA-PY
  , credential exchange protocols, DID resolution services, and secure messaging workflows.
• Implement credential lifecycle features—including issuance, presentation, revocation, and IETF Status List support—aligned with W3C Verifiable Credentials and decentralized identity standards.
• Build secure APIs and asynchronous services to support verification flows, trust framework compliance, and interoperability across issuers, holders, verifiers, and external systems.
• Apply strong security practices, implementing cryptographic operations, secure key management, and hardware‑backed storage patterns.
• Ensure back‑end integrations follow best practices for authentication, authorization, encryption, and secure data exchange.
• Support front‑end user interfaces and admin dashboards that interact with credential services, ensuring usability, performance, and accessibility.
• Develop automated tests (unit, integration, API‑level), participate in code reviews, and uphold high engineering standards across the stack.
• Collaborate closely with architects, Dev Ops, security specialists, and cross‑ministry stakeholders to ensure end‑to‑end functional integrity.
• Document system designs, workflows, schema definitions, and operating procedures to support maintainability and knowledge sharing.
• Participate in Agile ceremonies, support milestone planning, and assist in troubleshooting distributed digital credential environments.

Must-Haves:

• In-depth development experience with JWT/JWS
  , PKI (X.509),
  OAUTH2, and SHA/SHA
  2.
• Integrate backend systems into broader enterprise and cross‑ministry ecosystems using REST APIs, event‑driven services, and secure messaging systems.