Senior Java Developer

2 weeks ago

Toronto, Ontario, Canada BuzzClan Full time

Position Title : Senior Java Developer

Location: Toronto, ON (Onsite)

Mode: Contract

Position Overview

The Senior Software Developer will provide hands-on technical expertise in the design, development, implementation, and maintenance of large-scale, enterprise web applications for the Ontario Public Service (OPS). The role requires extensive experience in Java-based application development, Oracle/SQL databases, RESTful services, and modern front-end technologies. The successful candidate will work closely with cross-functional technical and business teams while adhering to OPS development standards, security, and accessibility requirements.

Key Responsibilities

  • Translate technical and system specifications into working, tested, and maintainable applications
  • Design, develop, code, test, debug, and document enterprise-level software solutions
  • Develop and maintain RESTful APIs and microservices-based applications
  • Troubleshoot and resolve complex technical issues during development, deployment, and production support
  • Support application implementations, upgrades, conversions, and migrations
  • Collaborate with architects, developers, QA, and stakeholders throughout the Software Development Life Cycle (SDLC)
  • Ensure solutions comply with OPS standards, security protocols, and accessibility requirements (AODA)
  • Provide post-implementation support and contribute to continuous improvement initiatives

Mandatory Skills and Experience

  • 10+ years of experience designing and developing large-scale, multi-client web applications
  • 10+ years of hands-on Java development experience with Oracle or SQL databases
  • 5+ years of experience developing REST APIs and RESTful web services
  • Strong experience with microservices architecture and application design principles
  • Hands-on experience with modern front-end technologies including:
  • React
  • TypeScript
  • HTML5
  • CSS3
  • RxJS
  • or
  • Experience using Azure DevOps for source control, CI/CD, and work tracking
  • Strong understanding of Agile development methodologies
  • Solid knowledge of object-oriented design, design patterns, refactoring, and clean code practices

Technical Skills and Knowledge

  • Experience with relational and hierarchical database technologies
  • Strong SQL skills, including performance tuning and query optimization
  • Knowledge of security gateways and protocols (JWT, OAuth 2.0, SSL Certificates)
  • Experience with information retrieval packages and query languages
  • Familiarity with middleware, gateways, and system integrations

Oracle-Specific Experience (Highly Desirable)

  • Experience with Oracle E-Business Suite customizations and extensions
  • Strong knowledge of Oracle Financial modules including GL, AR, AP, Collections, and Inventory
  • Hands-on experience with PL/SQL, SQL, XML, Unix shell scripting, and Oracle Data Integrator
  • Experience with data warehouse concepts, ETL methodologies, and OBIEE
  • Experience with Java and Oracle Application Development Framework (ADF)

Soft Skills

  • Strong verbal and written communication skills
  • Proven analytical and problem-solving abilities
  • Ability to work effectively under pressure and within aggressive timelines
  • Demonstrated ability to collaborate with large, multi-disciplinary technical teams
  • Ability to present ideas, technical concepts, and solutions clearly and effectively

Public Sector Experience

  • Experience working within the Ontario Public Service or public-sector environments
  • Familiarity with OPS development standards, governance, and processes

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