RQ10456 - Software Developer - Mobile - Senior

Role Overview:

The Mobile Software Developer will design, develop, secure, and maintain Ontario's Digital Credential Wallet for iOS and Android , ensuring compliance with verifiable credentials standards, digital identity frameworks, and modern mobile security best practices . The role requires deep expertise in native and cross‑platform mobile development , digital wallets , and decentralized identity technologies , as well as strong collaboration within agile delivery teams.

Core Responsibilities:

• Design, implement, test, and deploy production-grade mobile applications  for iOS and Android that meet Ontario Digital Credential and Digital Identity requirements.
  
• Maintain and extend an open, interoperable Digital Credential Wallet , integrating components from other jurisdictions and open-source communities while managing technical debt.
  
• Implement secure credential issuance, storage, presentation, and verification  flows using W3C Verifiable Credentials and related protocols.
  
• Troubleshoot, diagnose, and resolve mobile application issues with a focus on performance, reliability, and security.
  
• Participate in Agile / Scrum ceremonies , including sprint planning, daily stand-ups, backlog refinement, and retrospectives.
  
• Support integration with external systems and platforms, including identity providers, verifiers, and backend ministry services.
  
• Apply security patches, OS upgrades, and cryptographic updates  in a timely manner.
  
• Produce and maintain high-quality technical documentation , architecture diagrams, and developer guides to support long-term maintainability.
  
• Implement and maintain privacy‑preserving credential flows  using SD‑JWT , SD‑JWT‑VC , and ISO/IEC mdoc (mDL and other doctypes) , including selective disclosure  and holder binding  where appropriate.
  
• Design presentation flows that support in‑person proximity  and remote/over‑the‑Internet  verification for mDL/mdoc, aligned with ISO/IEC 18013‑5  and 18013‑7 .
  
• Integrate token/credential status  checks using IETF Token Status List (TSL) , and where applicable map to W3C VC Status List  for web‑based ecosystems.
  

Experience and Skill Set Requirements:

Skill Set Requirements:

Mobile development:

• Experience working with commercial grade mobile iOS and Android applications using native languages (Objective-C / Swift, Xcode or Java with Android Studio).
  
• Experience with iOS or Android. Strong experience developing multithreaded applications.
  
• Experience with mobile operation system (OS) architecture in areas of user interface (UI), memory management, data storage, application management by OS, and cybersecurity.
  
• Experience with UI development of mobile application (scalable for different screen resolutions and localization).
  
• Experience working with continuous integration.
  
• Must have apps published in either the Apple or Google store.
  
• Experience in developing Native and Hybrid apps with iOS/Swift, Android/Java, React Native/TypeScript.
  
• Experience with Apple and Google wallets, or custom digital wallets, such as add passes/credentials to a wallet.
  
• Knowledge of using Secure Enclave and/or TrustZone.
  
• Experience in developing mobile apps that use local on device capabilities, such as camera, Bluetooth, microphone, accelerometer, etc.
  
• Working with Open Source community and Open Source products
  

Digital Trust and Verifiable Credentials:

• Demonstrated experience with:
  
• Developing mobile solutions with Open Wallet Foundation products and solutions, including Credo and Bifold wallet applications.
  
• Familiarity and experience developing mobile solutions with Open Wallet Foundation Aca-Py, Hyperledger Indy technology stack will be considered.
  
• Aries Framework Javascript (AFJ) / Credo.
  
• SD-JWT, IETF Status Lists, mDOC, JSON-LD, Anoncreds (including Aries Interoperability Profiles (AIP) 1 and 2)
  
• Developing in React Native.
  
• JavaScript, HTML5, CSS3.
  
• JavaScript frameworks such as , , & Vue and TypeScript.
  
• Developing responsive design & progressive web applications.
  
• Developing/working with APIs and API Gateways.
  
• Familiarity with JSON & REST APIs.
  
• Experience working with continuous integration.
  
• Experience with OpenID for Verifiable Credential Issuance (OID4VCI 1.0)  and OpenID for Verifiable Presentations (OID4VP) ; ability to issue both SD‑JWT‑VC  and ISO mdoc  credentials per high‑assurance interop profiles.
  
• Knowledge with ISO/IEC 18013‑5 (mdoc/mDL)  and 18013‑7  (online presentation); familiarity with 23220‑4  operational protocols is an asset.
  
• Experience with W3C  verifiable credential data model,  and decentralized identifiers (DIDs), X.509 certificates (RFC 5280), zero-knowledge proofs, SD-JWT, JWT, JSON-LD
  
• Digital wallet development experience in native and/or hybrid app; hardware level encryption (HLE), use of secure elements on mobile devices (e.g., Apple Secure Enclave).
  
• Experience with JOSE/COSE, Oauth2 JWT/JWS , ECDSA/EdDSA , ECC/RSA , TLS , PKI , device‑bound keys  for holder binding (e.g., SD‑JWT+KB (key binding)  and mdoc transaction signing ).
  
• , Python
  
• Ensure compliance with global digital identity standards and/or specifications such as W3C Verifiable Credentials , IETF, OIDF,  PCTF , NIST , and eIDAS(ARF) .
  

Back End:

• Experience working with Java, NodeJS and RESTful APIs.
  
• SOAP Web Service development connecting to backend Ministries.
  
• API management tools such as IBM API Connect or equivalent.
  
• Familiarity with Docker and Kubernetes containers and cloud-based environments.
  
• Working experience in distributed, event-driven systems.
  
• Familiarity with PKI security.
  
• Experience working with messaging systems.
  
• Experience working with Shell Scripts.
  
• Experience working with continuous integration.
  
• Java/Sprint Framework, , Python/Django.
  

Team Contributor and Agile Experience:

• Experienced in developing and updating technical documentation.
  
• Experienced with Agile methodologies and related ceremonies, and tools.
  
• Self starter and motivated individual.
  
• Ability to analyze and break down complex problems.
  
• Effective at managing time, schedule, and commitments in a fast-paced environment with multiple competing priorities.
  
• Experienced with testing, test case development and related documentations.
  
• User focused/centered designs to solve real problems for users.