Senior API Integration Developer

Assignment: RQ11528 - Software Developer - API - Senior

Job Title: Senior API Integration Developer

Requisition (SS): RQ11528

Start Date: 2026-09-21

Client: Government Services Integration Cluster

End Date: 2027-10-01

Office Location: 222 Jarvis St., Toronto

Organization: Government Services Integration Cluster

Ministry: Ministry of Public and Business Service Delivery and Procurement

# Business Days: 283.00

5 days onsite

Must Have:

• 10+ years of experience as a designer and developer in the large-scale multi-client web applications
• 10+ year of hands-on working experience of Java development with Oracle or SQL database
• 5+ years of hands-on experience of RestAPI, RESTful WebServices
• Knowledge of security gateways and protocols (JWT, Oauth2.0, SSL Certificates)
• Solid Understanding of Agile methodologies

Description

Responsibilities

• Required to translate technical systems specifications into working, tested applications. This includes: o developing detailed programming specifications o writing and/or generating code o compiling data-driven programs, maintaining, and conducting unit tests. o Analyzes, designs, develops, codes and implements programs in one or more programming languages, for Web and Rich Internet Applications o Supports applications with an understanding of system integration, test planning, scripting, and troubleshooting o Designs and develops REST API platform (e.g., with using Apigee/APIM) o Converts web services from SOAP to REST or vice-versa
• Resolves and troubleshoots technical problems which arise during the use and operation of software packages, including technical assistance in implementation, conversion and migrations.

General Skills

• Experience in programming and analysis; specialized software package support at the specified experience level
• Ability to collaborate with IT Professionals throughout the Software Development Life Cycle
• Experience in structured methodologies for the development, design, implementation and maintenance of applications
• Experience in design, code, test, debug and document applications
• Experience in the use of object and/or third generation language development tools
• Experience in one or more programming languages
• Experience in application design, latest design patters, deployment and troubleshooting
• Experience with relational and hierarchical database technologies
• Experience in the use of information retrieval packages using query languages
• Experience with one or more communications protocols
• Experience in structured methodologies for the design, development, implementation and maintenance of applications
• Experience eliciting and documenting information from diverse business area stakeholders and subject matter experts
• Excellent analytical, problem-solving and decision-making skills; verbal and written communication skills; interpersonal and negotiation skills
• A team player with a track record for meeting deadlines

API Skills

• Experience with Web Technologies (DHTML, AJAX, etc.)
• Experience with Security frameworks (e.g., JWT, OATH2)
• Experience in API layer like security, custom analytics, throttling, caching, logging, monetization, request and response modifications etc. using Apigee
• Experience in creating REST API documentation using Swagger and YAML or similar tools desirable
• Experience with Integration frameworks (e.g., Mule, Camel) desirable

Desirable Skills

• Knowledge and experience with programming Internet-ready applications
• Knowledge and experience in rapid application development (RAD) methodologies
• Knowledge and understanding of Information Management principles, concepts, policies and practices
• Experience with middleware and gateways
• Experience reviewing, analyzing, and modifying product installation scripts including encoding, testing, debugging
• Ability to provide post-implementation support and resolve any post-implementation technical issues
• Experience conducting design walkthrough sessions with project team
• Knowledge and understanding of Accessibility for Ontarians with Disability Act (AODA) and related regulations and standards
• Ability to provide user and system documentation as required

Experience and Skill Set Requirements

1. Core Skills and Experience (40%)

• 5+ years of hands-on experience in API development, integration design, and implementation in complex enterprise environments
• Proven experience delivering solutions using platforms such as IBM API Connect, IBM App Connect Enterprise (ACE), MuleSoft, or Azure API Management (APIM)
• Strong understanding of RESTful API design, event-driven architecture, and microservices
• Demonstrated ability to integrate with enterprise platforms such as Microsoft SharePoint, Microsoft Dynamics CRM, Siebel, and Curam
• Experience with integration between APIs and enterprise systems (e.g., databases, CRMs, ERPs)
• Demonstrated experience with API lifecycle management, including versioning, testing, deployment, and monitoring
• Familiarity with cloud platforms, DevOps, and CI/CD practices for API deployment

2. Technical Skills and Experience (35%)

• Solid knowledge of API security best practices, including OAuth 2.0, JWT, API keys, and TLS
• Experience implementing API gateway policies (rate limiting, throttling, transformation, logging)
• Strong knowledge of integration patterns, such as synchronous/asynchronous messaging, pub/sub, and message queues
• Deep understanding of OpenAPI (Swagger) specifications and API documentation standards
• Hands-on experience with middleware, ESB, and enterprise integration patterns
• Proven ability to integrate APIs with SharePoint document libraries and workflows, CRM systems, and case management platforms
• Familiarity with containerization technologies (e.g., Docker) and orchestration tools (e.g., Kubernetes) is an asset
• Proficient with monitoring and troubleshooting tools for APIs and integrations
• Ability to troubleshoot integration errors and performance issues across platforms

3. Communication and Documentation Skills (20%)

• Excellent written and verbal communication skills for both technical and non-technical audiences
• Ability to document APIs, integration workflows, and technical specifications clearly and thoroughly
• Experience collaborating with cross-functional teams including business analysts, QA, developers, and product owners
• Skilled in facilitating technical discussions and providing knowledge transfer to internal staff
• Strong ability to present ideas, lead technical walkthroughs, and produce clear status updates

4. Public sector Experience (5%)

• Experience with OPS IT project and architectural governance
• Knowledge of OPS Digital , accessibility, and cybersecurity standards