Senior Software Developer

We are seeking a highly accomplished Senior Software Developer for an enterprise contract opportunity based in Toronto. In this role, you will take on a premier full-stack software engineering, application architecture, and technical delivery capacity, specializing in the design, development, and enhancement of scalable, multi-tier enterprise solutions.

As a Senior Software Developer, you will bridge the gap between business requirements, complex backend architectures, responsive modern frontends, and relational/No

SQL data platforms. Operating fully onsite in Toronto, you will lead the implementation of secure RESTful APIs and microservices using Java and Spring Boot, build user-friendly and accessible user interfaces using React and Angular, and design high-performance database schemas across PostgreSQL, PL/pgSQL, and Azure Cosmos DB. This position demands a seasoned development authority with extensive full-lifecycle software delivery tenure, robust automated testing and CI/CD capabilities, and a commitment to delivering resilient, high-quality enterprise applications.

Location:

Toronto, ON

Assignment Type:
Onsite (5 days per week)

Contract Duration: 10-month contract (with potential for extension)

• Modern Full-Stack Stack:
  Hands‑on development across Spring Boot, Java, React, Type Script, and modern JavaScript frameworks.
• Diverse Data Ecosystem:
  Architect enterprise data solutions using PostgreSQL, PL/pgSQL, Azure Cosmos DB, and Redis caching.
• Cloud & Microservices Scope:
  Build and deploy scalable microservices leveraging Microsoft Azure services and modern API patterns.
• Comprehensive Quality Engineering:
  Lead automated testing frameworks across JUnit 5, Mockito, Jest, and Playwright within CI/CD pipelines.

• Translate business requirements and technical systems specifications into scalable, secure, and fully tested enterprise applications.
• Develop detailed technical designs, architecture patterns, and programming specifications for n-tier application frameworks.
• Design, build, and maintain robust backend microservices, RESTful APIs and batch processes utilizing Spring Boot and the broader Spring Framework.
• Design and implement modern, responsive, and accessible UI components and web applications utilizing React, Angular, Type Script, and modern JavaScript.
• Architect and optimize database structures, normalization models, indexing strategies, stored procedures, and functions in PostgreSQL, PL/pgSQL and Azure Cosmos DB.
• Implement data persistence layers and object-relational mapping utilizing JPA, Hibernate, or MyBatis.
• Integrate caching solutions and middleware adapters using tools such as Redis to maximize backend throughput and minimize latency.
• Build, maintain, and execute automated test suites spanning unit, integration, API and end-to-end testing utilizing JUnit 5, Mockito, Jest and Playwright.
• Troubleshoot, debug, and resolve complex application errors, performance bottlenecks, and integration defects across development, test and production environments.
• Support application deployments, data conversions, migrations and system integration testing in close collaboration with infrastructure and Dev Ops teams.
• Ensure all application interfaces comply with corporate security standards, performance benchmarks, and accessibility regulations (AODA/WCAG).
• Participate actively in Agile sprint ceremonies, technical design walkthroughs, backlog refinements and peer code reviews.

• Core Technical & Application Development Requirements
• Enterprise Development Tenure:
  Minimum 10+ years of hands‑on professional experience developing scalable, n-tier enterprise software applications.
• Backend Architecture (Java / Spring):
  Deep expertise in application design and microservices…