Senior Software Testing Engineer

We are seeking a highly experienced Senior Software Developer - Full Stack to lead full-lifecycle software development, application modernization, and system enhancement initiatives. In this role, you will work across both modern and legacy technical stacks—ranging from Java/Spring Boot, Angular, and Node.js to legacy framework components, IBM WebSphere, and Oracle database environments. Collaborating closely with cross-functional teams in an Agile framework, you will architect web interfaces, optimize relational database interactions, resolve vulnerabilities, and deliver reliable end-to-end software solutions.

Location: Toronto, ON (Hybrid – 3 days in office)

Duration: 4-month contract.

Drive impactful application modernization bridging modern web stacks with enterprise legacy architectures.

Apply diverse technical expertise across Java, Spring Boot, Angular, Node.js, PL/SQL, and WebSphere.

End-to-End Ownership: Lead the complete software development lifecycle from initial proof-of-concept to production deployment.

Flexible Hybrid Model: Lead end-to-end development activities—including software design, coding, unit testing, integration, and defect resolution—across application and database components.

Design and build user-friendly web interfaces and server-side components using modern front-end frameworks (Angular, Node.js) and Java back-end stacks (Spring Boot, J2EE, RESTful Web Services).

Develop data migration scripts, PL/SQL queries, and shell routines to migrate source data, clean data stores, and optimize interactions with relational database systems.

Work with legacy application architectures (including Oracle Forms/Reports, Struts, and EJB) to maintain, troubleshoot, and modernize systems.

Create and package deployment releases across testing, staging, and production environments using DevOps tools and CI/CD pipelines.

Conduct code and design reviews, identify performance or availability bottlenecks, and perform vulnerability assessments to strengthen application security.

Collaborate with business analysts, solution architects, and quality assurance teams to ensure application code strictly aligns with functional specifications and digital accessibility standards (AODA).

Author detailed technical design documentation, deployment procedures, and system guides to ensure operational supportability and seamless transition.

Senior Development Experience: 15+ years of overall experience in software programming, systems analysis, and application development (Strictly Required).

Full-Stack Engineering Seniority: 10+ years of dedicated hands-on experience designing, developing, and implementing complex web applications and backend services (Strictly Required).

Core Java & Framework Expertise: Proven expertise with Java, J2EE, EJB, Struts, Spring Boot, Web Services, XML, Angular, and Node.js (Strictly Required).

Database & Scripting Seniority: Extensive hands-on experience with Oracle databases, PL/SQL development, complex SQL queries, and Shell scripting (Strictly Required).

Legacy Systems & Middleware: Strong familiarity with IBM WebSphere, web application deployment, and extracting unusable data/logic from Oracle Forms/Reports environments (Strictly Required).

DevOps & Standards: Practical experience with DevOps tools, Agile/Scrum methodologies, vulnerability mitigation, PDF/report generation, and digital accessibility compliance (AODA).

If you're interested in the "Senior Software Developer - Full Stack" role based in Toronto, we encourage you to apply online at

As a result, we are committed to developing and implementing strategies to increase the equity, diversity and inclusion within the workplace by examining our internal policies, practices, and systems throughout the entire lifecycle of our workforce, including its recruitment, retention and advancement for all employees. In addition to our deep commitment to respecting human rights, we are dedicated to positive actions to affect change to ensure everyone has full participation in the workforce free from any barriers, systemic or otherwise, especially equity-seeking groups who are usually underrepresented in Canada's workforce, including those who identify as women or non-binary/gender non-conforming; Indigenous or Aboriginal Peoples; persons with disabilities (visible or invisible) and; members of visible minorities, racialized groups and the LGBTQ2+ community.

Randstad Canada is committed to creating and maintaining an inclusive and accessible workplace for all its candidates and employees by supporting their accessibility and accommodation needs throughout the employment lifecycle. We ask that all job applications please identify any accommodation requirements by sending an email to View email address on randstad.com.