RQ– Software Developer – API – Senior

Software Developer – API – Senior

Job Title:

RQ11442 – Software Developer – API – Senior

Client:
Ministry of Public and Business Service Delivery and Procurement

Work Location:

300 Water Street, Toronto, Ontario, Canada –
Onsite

Estimated

Start Date:

August 24, 2026

Estimated End Date:
August 24, 2027

Business Days: 254

Hours:

7.25 hours per day

Extension:
Probable after the initial mandate

Security Level: No Clearance Required

We are seeking a highly experienced Senior API Software Developer with strong expertise in modern web technologies, RESTful API development, cloud platforms, and AI/ML engineering.

The successful candidate will have extensive experience with React, Type Script, Node.js, Next.js, REST APIs, Progressive Web Apps, Azure, Python, Agentic AI, LLMOps, RAG, MLOps, and data engineering technologies . This role will focus on designing, developing, integrating, testing, and supporting scalable API platforms and AI-enabled applications.

The ideal candidate will be comfortable working in Agile environments and collaborating with technical teams, business stakeholders, and subject matter experts throughout the Software Development Life Cycle.

• API & Application Development
• Translate technical system specifications into working, tested applications.
• Develop detailed programming specifications and application code.
• Design, develop, test, debug, document, and maintain applications.
• Analyze, design, develop, code, and implement programs for web and Rich Internet Applications.
• Design and develop scalable REST API platforms, including API management solutions such as Apigee/APIM.
• Build and test RESTful APIs.
• Convert web services between SOAP and REST where required.
• Develop API integrations and support system integration activities.
• Create API documentation using Swagger, YAML, or similar tools.
• Support API security, analytics, throttling, caching, logging, and request/response transformations.
• AI, ML & Agentic AI Development
• Develop and support production-level AI agents and AI-enabled systems.
• Work with various AI models, tools, and architectures, including:
• LLMs
• Machine Learning
• Computer Vision
• Agentic AI / Multi-Agent Systems
• RAG
• Work with technologies and frameworks including:
• MCP
• Lang Chain
• Lang Graph
• Qdrant
• Python
• Support implementation of enterprise AI frameworks and intelligent applications.
• Apply MLOps practices and tools within enterprise environments.
• Work with ML models and frameworks such as XGBoost and Tensor Flow.
• Utilize MLOps technologies such as MLflow and DVC.
• Front-End & Progressive Web Application Development
• Develop modern web applications using React, Type Script, Node.js, and Next.js.
• Build and maintain Progressive Web Apps (PWAs).
• Develop responsive and accessible user interfaces.
• Implement front-end functionality for login, profile creation, customer notifications, and self-service registration.
• Apply responsive design, front-end testing, debugging, page-load optimization, and version-control practices.
• Work extensively with HTML, JavaScript, CSS, and CSS frameworks.
• Apply modern web architecture patterns, including Jamstack where appropriate.
• Work with headless content management systems.
• Cloud, Dev Ops & Data Engineering
• Develop and deploy applications using cloud platforms such as Microsoft Azure.
• Work with Dev Ops task boards, pipelines, and deployment processes.
• Support continuous integration and deployment activities.
• Work with Apache Airflow and PySpark for data engineering and workflow orchestration.
• Support enterprise MLOps tools and processes.
• Develop integrations with authentication and identity platforms, including Azure AD B2C and Okta.
• Testing, Troubleshooting & Support
• Develop and execute unit tests.
• Support application integration and test planning.
• Troubleshoot application and software package issues.
• Provide technical assistance during implementation, conversion, migration, and deployment activities.
• Resolve post-implementation technical issues.
• Review, analyze, modify, encode, test, and debug installation scripts.
• Participate in design walkthroughs and technical reviews.
• Provide application and system documentation.

• 5+ years of experience with React…