Senior Full Stack Java / React Developer

Upstaff (Toronto ON, Canada) Follow 7 hours ago

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Responsibilities

Design, implement, and continuously expand data pipelines by performing extraction, transformation, and loading activities.
Translate technical systems specifications into working, tested applications. This includes developing detailed programming specifications, writing and/or generating code, compiling data-driven programs, maintaining, and conducting unit tests.
Resolve and troubleshoot technical problems which arise during the use and operation of software packages, including technical assistance in implementation, conversion and migrations.

General Skills

Experience in programming and analysis; specialized software package support at the specified experience level
Ability to collaborate with IT Professionals throughout the Software Development Life Cycle
Experience in structured methodologies for the development, design, implementation and maintenance of applications
Experience in design, code, test, debug and document applications
Experience in the use of object and/or third generation language development tools
Experience in one or more programming languages
Experience in application design, latest design patterns, deployment and troubleshooting
Experience with relational and hierarchical database technologies
Experience in the use of information retrieval packages using query languages
Experience with one or more communications protocols
Experience in structured methodologies for the design, development, implementation and maintenance of applications
Experience eliciting and documenting information from diverse business area stakeholders and subject matter experts
Experience with application architecture, front-end & back-end integration, API development
Excellent analytical, problem‑solving and decision-making skills; verbal and written communication skills; interpersonal and negotiation skills
A team player with a track record for meeting deadlines

Full Stack Skills

Proficient with both front end and back end development, including any associated areas such as database design/management and DevOps
Knowledge and experience with design and implementation of the overall web architecture
Experience with implementation of approved user interface, design and deployment of database
Knowledge and experience ensuring the entire stack is designed and built for speed and scalability
Knowledge and experience with the design and construction of REST API services
Knowledge and experience integrating front‑end UI with the constructed API
Knowledge and experience in design and implementation of continuous integration and deployment

Desirable Skills

Knowledge and experience with programming Internet‑ready applications
Knowledge and experience in rapid application development (RAD) methodologies
Knowledge and understanding of Information Management principles, concepts, policies and practices
Experience with middleware and gateways
Experience reviewing, analyzing, and modifying product installation scripts including encoding, testing, debugging
Ability to provide post‑implementation support and resolve any post‑implementation technical issues
Experience conducting design walkthrough sessions with project team
Knowledge and understanding of Accessibility for Ontarians with Disability Act (AODA) and related regulations and standards
Ability to provide user and system documentation as required
High level of knowledge around the Angular framework and JavaScript.
High level knowledge of front‑end interfaces.
Strong knowledge of RESTful APIs and good understanding of Swagger files.
Demonstrated ability to create self‑contained, reusable, and testable modules and components that build on the elements and modules of core AngularJS.
Experience creating, designing, and implementing layouts for new and existing web pages. Excellent knowledge of front‑end web programming languages, such as HTML, CSS, JavaScript, and AngularJS, with ability to render server‑side and client‑side content.
Experience designing user interactions on websites, developing servers and databases for website functionality and coding for mobile platforms.
Fundamental knowledge of UX/UI.
Experience ensuring front end code is able to query APIs.
Experience with Java WebLogic and Java programming for web applications (Tomcat, Weblogic), EJB, Servlet
Strong database skills and SQL skills (Oracle, SQL Server)
Experience / knowledge of REST, SOAP web services.
Experience / knowledge of Azure DevOps, JIRA, agile/scrum

Requirements

Engineering Practices – 20%
- Collaborates effectively within a cross‑functional Agile product team, partnering with developers, UX designers, QA engineers, product managers, and architects to deliver high‑quality solutions.
- Demonstrates a strong commitment to applying and promoting best practices in front‑end, middle‑tier, and back‑end development.
- Experience working as a core contributor in autonomous, cross‑functional product teams, helping drive technical direction and delivery.
- Maintains exceptional attention to detail and consistently produces clean, maintainable, and well‑structured code.
- Deep experience with Agile delivery practices and Azure DevOps tools, including boards, pipelines, and code review workflows.
- Thrives in fast‑paced environments, adapting quickly to evolving priorities and project needs.
- Strong understanding of TDD methodologies, with hands‑on experience designing, writing, and executing unit tests, integration tests, and automated test suites.
Technical Skills – 50%
- Significant hands‑on experience building responsive, performant applications for both web and mobile platforms.
- Advanced knowledge of Java, JavaScript/TypeScript and modern frameworks such as SpringBoot, React and Next.js; able to architect and mentor others on best practices.
- Deep hands‑on experience with Node.js for developing scalable middle‑tier and back‑end services.
- Strong knowledge of HTML5, CSS3, and modern UI development patterns.
- Proficient with Azure DevOps for backlog management, CI/CD pipelines, code branching, and automated deployments.
- Expertise in responsive design, debugging techniques, performance optimization, and version control workflows with Git.
- Ability to analyze user stories, business requirements, and technical specifications and translate them into robust, tested, production‑ready applications.
- Skilled in developing detailed programming specifications and technical documentation.
- Experienced in diagnosing and resolving technical issues throughout testing, integration, deployment, and production support.
- Hands‑on experience developing secure web applications in compliance with PCI standards and WCAG 2.0 accessibility requirements.
- Ensures all front‑end and back‑end components adhere to AODA standards.
- Strong understanding of semantic HTML, ARIA roles, and accessibility design patterns, ensuring compatibility with assistive technologies such as JAWS.
- Previous Ontario Government experience and familiarity with the Digital Dealer Registration (DDR) service is considered an asset.
Architecture and Design – 20%
- Strong understanding of modern cloud‑based architectures and component‑driven development in React and Java.
- Ability to design and implement reusable, scalable, and maintainable UI components independently or through collaboration.
- Experience architecting modular components and frameworks that support long‑term scalability and maintainability.
- Knowledge of front‑end and back‑end performance optimization techniques and best practices.
- Familiarity with implementing modern architecture principles and patterns, including serverless architectures, microservices, and RESTful API design.
Communication Skills – 10%
- Able to clearly articulate technical ideas, propose solutions, and ask clarifying questions when needed.
- Strong collaboration skills, with the ability to mentor peers and support team members to achieve shared goals.
- Capable of presenting technical recommendations and design considerations in a user‑friendly, accessible way to both technical and non‑technical audiences.
- Skilled in documenting code, technical processes, and architectural decisions.
- Excellent analytical, problem‑solving, interpersonal, verbal, and written communication skills.