Senior Full Stack Developer - API

Assignment: RQ11442 - Software Developer - API - Senior Job Title: Senior Full Stack Developer - API Requisition (SS): RQ11442 Start Date: 2026-08-24 Client: Government Services Integration Cluster End Date: 2027-08-24 Office Location: 300 Water St, Toronto Organization: Government Services Integration Cluster Ministry: Ministry of Public and Business Service Delivery and Procurement # Business Days: 254.00 5 days onsite

Must Have:

• 5+ Experience with React framework and typescript
• 5+ Experience with Node.js and Next.js
• 5+ Experience building and testing RESTful APIs
• 2-3+ years of Multi-agent (Agentic AI), LLMops, MCP, langchain, langGraph, RAG, Qdrant, Python
• Experience with ML models - XGboost, Tensorflow
• Experience with Airflow, PySpark
• 5+ Hands on experience with Progressive Web Apps
• Experience and expert knowledge in HTML, JavaScript, CSS and CSS Frameworks
• Experience with cloud platforms such as Azure

Nice to have:

• Hands on experience developing production level AI agents, frameworks and AI supported systems using various models, tools and architectures (e.g. LLMs, ML, Computervision, etc.)
• Hands on experience designing and implementing MLOps tools and processes in enterprise environments
• Prior OPS exp or public sector exp.

Description

Responsibilities

• Required to translate technical systems specifications into working, tested This includes:
• developing detailed programming specifications
• writing and/or generating code
• compiling data-driven programs, maintaining, and conducting unit
• Analyzes, designs, develops, codes and implements programs in one or more programming languages, for Web and Rich Internet Applications
• Supports applications with an understanding of system integration, test planning, scripting, and troubleshooting
• Designs and develops REST API platform (e.g., with using Apigee/APIM)
• 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 migration.

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

Technical Skills 40%

• Experience with Agile methodologies
• Experience with React framework and typescript
• Experience with Node.js and Next.js
• Experience building and testing RESTful APIs
• Multi-agent (Agentic AI), LLMops, MCP, langchain, langGraph, RAG, Qdrant, Python
• ML models - XGboost, Tensorflow
• MLops - Mlflow, DVC
• Airflow, PySpark
• Working knowledge of Jamstack Architecture
• Hands on experience with Progressive Web Apps
• Hands on experience with responsive design, front-end testing and debugging techniques, page load optimization and version control
• Experience and expert knowledge in HTML, JavaScript, CSS and CSS Frameworks
• Working knowledge of DevOps, task boards, pipelines, etc.
• Experience with headless content management systems
• Experience creating front end functionality for login page, profile creation, customer notifications and self-service sign-up
• Required to translate technical systems specifications into working, tested applications. This includes:
• Developing detailed programming specifications
• Writing and/or generating code
• Compiling data-driven programs, maintaining, and conducting unit tests
• Resolves and troubleshoots technical problems which arise during the use and operation of software packages, including technical assistance in implementation, conversion, and deployment

Experience 40%

• Experience with cloud platforms such as Azure
• Experience with Agile methodologies including using kanban/task boards
• Extensive experience with JavaScript, CSS, HTML, and front-end languages, user interface design.
• Experience with RESTful APIs.
• Hands on experience developing production level AI agents, frameworks and AI supported systems using various models, tools and architectures (e.g. LLMs, ML, Computervision, etc.)
• Hands on experience designing and implementing MLOps tools and processes in enterprise environments
• 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 such as Agile Scrum for the development, design, implementation, and maintenance of applications
• Experience in design, code, test, debug and document applications
• Experience in application design, latest design patterns, deployment, and troubleshooting
• Experience with one or more communications protocols
• 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
• Hands on experience building integrations to IAA systems such as Azure AD B2C Authentication, Okta Authentication

Communication Skills 20%

• Strong communication skills to prepare documentation, including but not limited to: solution documentation, user manuals, reports, reviews, assessments
• Ability to present ideas and suggestions clearly and effectively and in a user-friendly manner; maintain a high level of customer service to both internal and external clients
• Ability to communicate designs and development in clear and understandable manner