Java Developer

Cleo Consulting; Toronto; On-site; CAD 110,000 - 160,000; Full time

Job summary

Government Services Integration Cluster in Toronto is seeking a Senior Java Developer to translate technical specifications into tested, scalable applications.

The role requires extensive Java experience, strong database skills with Oracle/SQL, and hands-on API development using REST/RESTful services, with a focus on secure, enterprise-grade design. You will collaborate across IT and business stakeholders to deliver reliable software for government services.

Qualifications

• 10+ years in designing and developing large-scale web applications.
• 10+ years Java development with Oracle/SQL databases.
• 5+ years delivering RESTful APIs and web services.
• Knowledge of security gateways and protocols (JWT, OAuth2, SSL).

Responsibilities

• Translate technical systems specifications into working, tested applications.
• Develop detailed programming specifications and write/generate code; compile data-driven programs and perform unit tests.
• Resolve and troubleshoot technical problems during use and operation of software packages; provide implementation assistance in conversions and migrations.

Skills

Java development

Web applications

REST APIs

Security protocols (JWT, OAuth2, SSL)

Oracle/SQL database experience

Oracle E-Business familiarity

Azure DevOps

Microservices architecture

Code debugging/documentation

Team collaboration

Tools

Oracle database

PL/SQL

XML

Unix shell scripting

ADF

SQL

Job description

Assignment: RQ11498 - Software Developer - Senior

Job Title: Java Developer

Requisition (SS): RQ11498

Start Date :2026-11-01

Client: Government Services Integration Cluster

End Date: 2027-03-31

Office Location: 222 Jarvis St, Toronto

Organization: Government Services Integration Cluster

Ministry: Ministry of Public and Business Service Delivery and Procurement

# Business Days: 101.00

5 days onsite

Must Have:

• 10+ years of experience as a designer and developer in the large-scale multi-client web applications
• 10+ year of hands-on working experience of Java development with Oracle or SQL database
• 5+ years of hands-on experience of RestAPI, RESTful WebServices
• Knowledge of security gateways and protocols (JWT, Oauth2.0, SSL Certificates)

Nice to have:

• OPS Development standard/Process

Description

Responsibilities

• Required to translate technical systems specifications into working, tested applications.
• This includes:
• developing detailed programming specifications
• writing and/or generating code o compiling data-driven programs, maintaining, and conducting unit tests.
• Resolves and troubleshoots 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 patters, 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
• 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

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
• Additional Skills for Oracle Software Developer:
• Experience in conducting impact assessments on Oracle E-Business application customizations and extensions.
• Strong conversion experience in Account Receivable Collection modules
• Strong programming skills in Oracle database, PL/SQL, SQL, XML, Unix shell scripts and Oracle Data Integrator
• Proved business knowledge of General Ledger, Accounts Receivable, Collections, Accounts Payable and Inventory Modules of Oracle E-Business
• Great knowledge of Oracle E-Business table structure related to GL, AR, Collections, AP, INV and FND
• Strong knowledge of SQL tuning and using partition tables
• Demonstrated experience and understanding of data warehouse, ETL methodologies and OBIEE
• Demonstrated work experience on Java and Oracle Application Development Framework (ADF) will be a great asset
• Strong verbal and written communication skills and leadership abilities to be able to oversee the quality assurance of the project from technical perspective

Experience and Skill Set Requirements

Core Skills and Experience - 40 %

• 10+ years of experience as a designer and developer in the large-scale multi-client web applications
• 10+ year of hands-on working experience of Java development with Oracle or SQL database
• 5+ years of hands-on experience of RestAPI, RESTful WebServices
• Knowledge and experience of microservice architecture as well as a demonstrated ability to apply core architecture principles to enhance a product's extensibility and maintainability.
• Knowledge and experience with programming Internet-ready applications
• Knowledge and experience in rapid application development (RAD) methodologies
• Experience using Azure DevOps

Technical Skills and Experience - 35%

• Knowledge of security gateways and protocols (JWT, Oauth2.0, SSL Certificates)
• Solid Understanding of Agile methodologies
• Object Oriented coding practices, including design patterns knowledge, refactoring, clean code.
• 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

Soft Skills- 20%

• Strong communication skills; both written and verbal
• Ability to develop and present new ideas and conceptualize new approaches and solutions
• Excellent interpersonal relations and demonstrated ability to work with others effectively in teams
• Demonstrated ability to work with functional and technical teams Demonstrated ability to participate in a large team and work closely with other individual team members
• Proven analytical skills and systematic problem solving
• Strong ability to work under pressure, work with aggressive timelines, and be adaptive to change
• Displays problem-solving and analytical skills, using them to resolve technical problems

Public sector Experience- 5%

• OPS Development standard/Process