Senior Software Developer

Software Developer – Senior (RQ11296) | Ministry of Public and Business Service Delivery and Procurement | Onsite | Ontario, Canada

We are hiring a Senior Software Developer to design, develop, and integrate enterprise-scale, multi-tier business applications for the Ministry of Public and Business Service Delivery and Procurement. This role is ideal for an experienced full-stack developer with 10+ years of enterprise application development, expertise in REST/SOAP services, Oracle technologies, Java/JEE, .NET, and proven experience leading technical teams through the complete software development lifecycle.

The successful candidate will possess strong solution architecture, systems integration, technical leadership, and enterprise application development experience while working within large, complex IT environments.

Role Snapshot

Requisition ID: RQ11296

Job Title: Senior Software Developer

Client: Ministry of Public and Business Service Delivery and Procurement

Work Location: 49 Place d'Armes, Kingston or 222 Jarvis Street / 5700 Yonge Street, Toronto, Ontario (Onsite)

Estimated Start Date: August 10, 2026

Estimated End Date: March 31, 2027

Duration: 170 Business Days

Hours: 7.25 Hours per Day

Extension: None

Security Clearance: No Clearance Required

Application Requirements

If you are interested and your experience aligns with the role, please send the following documents to [email removed] by Tuesday, July 28, 1:00 PM EST.

Mandatory Documents

• Updated Resume (Word Format)

• Professional References

• Expected Hourly Rate

• Visa Status

• LinkedIn Profile URL

Note: Applications submitted without all mandatory documents cannot be processed.

Key Responsibilities

• Solution Analysis, Design & Architecture (30%)

• Collaborate with Business Analysts to analyze business and technical requirements.

• Design enterprise application architecture, including conceptual, logical, and physical solution models.

• Produce architecture deliverables and participate in architecture review checkpoints.

• Conduct technical design walkthroughs and solution reviews.

• Prepare comprehensive technical documentation and user guides.

• Ensure compliance with enterprise architecture, security, and development standards.

• Application Development & Systems Integration (30%)

• Design, develop, and integrate enterprise software solutions.

• Develop scalable multi-tier applications using REST APIs, SOAP/WSDL services, JSON/XML messaging, and modern UI technologies.

• Integrate applications with internal and third-party enterprise systems.

• Develop reusable, maintainable, and secure application components.

• Support application deployment and configuration management activities.

• Testing, Quality Assurance & Knowledge Transfer (20%)

• Develop unit and integration test cases.

• Perform unit and integration testing.

• Collaborate with testing teams on functional, performance, and vulnerability testing.

• Resolve defects and optimize application performance.

• Conduct knowledge transfer sessions and technical walkthroughs for project team members.

• Prepare technical support and transition documentation.

• Technical Leadership & Project Support (20%)

• Provide technical leadership to developers, system analysts, and testers.

• Lead solution design and code review sessions.

• Estimate development effort and support project planning activities.

• Coordinate development activities to ensure timely delivery.

• Support project management processes and ITIL best practices.

• Work closely with internal stakeholders, vendors, and service delivery partners.

Required Skills & Experience

Skill / Experience Years Required Enterprise software development in large, multi-platform environments 10+ Years Java/JEE enterprise technologies (JSP, Servlet, EJB, JDBC, JMS, JNDI) 10+ Years REST APIs, SOAP/WSDL Web Services, JSON/XML integration 10+ Years Oracle Database, PL/SQL, Oracle Designer 10+ Years Application servers (WebSphere, WebLogic, Tomcat, Apache) 10+ Years Enterprise application architecture and systems analysis 10+ Years Full-stack multi-tier application development 10+ Years Systems integration with third-party applications and services 10+ Years Development tools (Eclipse, IntelliJ IDEA, Visual Studio Code, MS Visio, PowerDesigner) Extensive Experience Software testing, debugging, refactoring, and performance optimization Extensive Experience Technical documentation and solution design artifacts Extensive Experience Leading enterprise software development teams Extensive Experience Project estimation, SDLC methodologies, and ITIL best practices Extensive Experience

Core Technical Environment

• Java / JEE

• JSP / Servlet

• EJB

• JDBC

• JMS

• JNDI

• REST API

• SOAP / WSDL

• JSON

• XML

• Oracle Database

• PL/SQL

• Oracle Designer

• Apache Tomcat

• IBM WebSphere

• Oracle WebLogic

• .NET

• Windows Server

• Solaris

• VPN

• PKI

• LDAP

• Eclipse

• IntelliJ IDEA

• Visual Studio Code

• MS Visio

• PowerDesigner

Preferred Qualifications

• Experience leading enterprise-scale software development initiatives.

• Strong knowledge of enterprise architecture standards and governance.

• Experience with software security, privacy, and quality assurance practices.

• Strong analytical, troubleshooting, and problem-solving skills.

• Excellent communication, stakeholder engagement, and consulting skills.

• Experience managing multiple concurrent assignments within complex enterprise environments.

Public Sector Experience (Highly Preferred)

• Experience working within Ontario Public Sector (OPS) or other government organizations.

• Understanding of government IT standards, architecture governance, security, privacy, and compliance requirements.

• Familiarity with government policies, procedures, directives, and enterprise architecture frameworks.

Please submit the following documents to [email removed] no later than Tuesday, July 28, 1:00 PM EST:

• Updated Resume (Word Format) – Mandatory

• Professional References – Mandatory

• Expected Hourly Rate – Mandatory

• Visa Status – Mandatory

• LinkedIn Profile URL – Mandatory

Applications missing any mandatory documents cannot be submitted to the client.

If this opportunity is not the right fit for you, we welcome referrals to experienced Senior Software Developers with strong expertise in enterprise Java technologies, full-stack development, systems integration, Oracle databases, REST/SOAP services, solution architecture, and technical leadership within large-scale enterprise environments.