We are seeking a Senior Java Developer
- Full Stack to design, develop, integrate, test, deploy, and maintain enterprise platform capabilities across user interface, service, API, workflow, integration, and data access layers. This role is responsible for building reusable platform services that support multiple business programs while implementing service-specific integrations for modern enterprise applications. The successful candidate will work closely with architects, product managers, business analysts, UX designers, QA specialists, DevOps engineers, security teams, and business stakeholders to deliver secure, scalable, observable, and maintainable software solutions. The role also provides technical leadership through design reviews, estimation, code reviews, testing, troubleshooting, mentoring, documentation, and production support.

Key Responsibilities
- Design, develop, integrate, test, deploy, and maintain enterprise platform applications.
- Translate approved technical specifications into secure, tested, and maintainable software solutions.
- Develop detailed programming specifications and application code.
- Design and develop frontend, backend, API, integration, workflow, middleware, and data access components.
- Build and maintain Java-based microservices, REST APIs, RESTful web services, and reusable platform services.
- Develop and maintain database objects, queries, data transformations, conversion routines, and integration components.
- Implement security gateways and protocols, including identity, access management, token-based authentication, certificates, and secure communications.
- Create and maintain automated unit, integration, API, database, and user interface tests.
- Participate in design walkthroughs, code reviews, estimation activities, sprint planning, release planning,



and technical decision-making.
- Review and modify build, configuration, installation, and deployment scripts.
- Troubleshoot technical issues during development, migration, deployment, and operational activities.
- Collaborate with multidisciplinary teams throughout the software development lifecycle.
- Provide production support and continuously improve application performance, reliability, extensibility, and maintainability.
- Prepare and maintain technical, deployment, support, and user documentation.
- Provide technical guidance while ensuring delivery commitments are met. Required Experience
- Ten or more years of experience designing and developing large-scale, multi-client web applications or equivalent senior-level software development experience.
- Strong experience working with Oracle, SQL, or comparable relational database technologies.
- Significant experience with REST APIs and RESTful web services.
- Experience translating system specifications into working applications, including coding, debugging, testing, maintenance, and documentation.
- Experience with microservice architecture and architecture best practices.
- Strong understanding of object-oriented programming, design patterns, refactoring, and clean code principles.
- Experience working in Agile delivery environments.
- Experience with relational and hierarchical databases, query optimization, and data access components.




- Experience with security technologies including JSON Web Tokens (JWT), OAuth 2.0, and SSL certificates.
- Experience with middleware, enterprise integrations, communications protocols, and data migration activities.
- Experience using Azure DevOps or equivalent tools for source control, build, testing, and deployment pipelines.
- Experience conducting code reviews, design walkthroughs, and technical troubleshooting activities.
- Experience working with diverse business and technical stakeholders.
- Experience supporting implementation, conversion, migration, and post-implementation activities. Technical Skills Core Skills
- Oracle Database
- SQL
- REST APIs
- RESTful Web Services
- Agile Delivery
- JWT
- OAuth 2.0
- SSL Certificates
- Secure Communications
- Identity Integration
- Middleware Technologies
- Database Design and Optimization
- Deployment Automation
- Application Troubleshooting
- Technical Documentation Soft Skills
- Robust written and verbal communication skills.
- Analytical and systematic problem-solving abilities.
- Strong decision-making and negotiation capabilities.
- Ability to lead discussions and participate in design walkthroughs.
- Ability to work effectively with technical and non-technical teams.
- Proven ability to perform under pressure and meet deadlines.
- Adaptability in fast-paced environments with changing priorities. Preferred Experience
- Experience with public-sector development standards, governance, accessibility, security, information management, and documentation practices. About Symbiotic Digital. Symbiotic Digital provides the IT Experts you need that solve problems and get things done. See what the top 2% in their f

📌 Senior Java Developer (Toronto)
🏢 Symbiotic Group
📍 Toronto