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Java Contract Jobs in Oshawa, ON (NOW HIRING)

OpsGuru

SDET Architect

Toronto, ON · On-site

Design and build test frameworks and automation across the stack; unit, integration, contract, end ... .NET, Java) based on specific problem domains. Ramp into unfamiliar stacks or codebases.

YO AI Labs

Software Engineer - Remote

Toronto, ON · Remote

Contract Location: Remote Job Summary: We are looking for experienced software engineers to help ... Java, C++, Go or Rust * Experience building, maintaining, or reviewing production-level ...

Victor Energy

Project Coordinator

Toronto, ON · Remote

As part of the Java Group, Victor Energy's staff have over 50 years of experience building some of ... Proven ability to understand construction administration and contract commercial terms * Analytical ...

New

Victor Energy

Project Coordinator

Toronto, ON · Hybrid

As part of the Java Group, Victor Energy's staff have over 50 years of experience building some of ... Proven ability to understand construction administration and contract commercial terms * Analytical ...

New

Source Code

RQ11240 - Sr. Applications Architect

Toronto, ON · On-site

CA$110.07 - CA$132.17/hr

RQ11240 - Sr. Applications Architect 9+ month contract (189 business days) - possible extension ... Java, C#, JavaScript), and communications protocols (ftp, http, smtp, ntp, tcp/ip, udp, icmp) · ...

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All JobsJava Contract JobsJava Contract Jobs in Oshawa, ON

Java Contract information

What are some common challenges faced by Java contracts and how can they be managed effectively?

Java contractors often work on short-term projects or fill skill gaps in development teams, which can present challenges such as quickly adapting to new codebases and varying team dynamics. To manage these effectively, it’s important to have strong communication skills, a proactive approach to understanding project requirements, and the ability to rapidly learn existing systems. Building rapport with permanent team members and maintaining thorough documentation can also help ease the transition. Staying current with Java frameworks and tools further ensures you can contribute value from day one.

What are the key skills and qualifications needed to thrive as a Java contract, and why are they important?

To thrive as a Java Contractor, you need strong proficiency in Java programming, experience with object-oriented design, and a solid understanding of software development methodologies, often supported by a relevant degree or certifications like Oracle Certified Professional Java Programmer (OCPJP). Familiarity with development tools such as Eclipse or IntelliJ IDEA, version control systems like Git, and frameworks such as Spring or Hibernate is typically required. Excellent problem-solving, adaptability, and communication skills help you collaborate with diverse teams and quickly respond to project changes. These skills ensure high-quality, maintainable code and successful completion of contract-based software projects.

What is the difference between Java Contract vs Java Developer?

AspectJava ContractJava Developer
CredentialsTypically requires Java certifications, experience in contract rolesRequires Java certifications, degree in computer science or related field
Work EnvironmentProject-based, short-term assignments, flexible hoursFull-time, ongoing employment, structured work hours
Employer & Industry UsageUsed by companies for specific projects, consulting firmsEmployed directly by companies, tech firms, or agencies
Search & Comparison IntentOften compared for contract opportunities, flexibilityCompared for full-time roles, career growth

Java Contract roles are typically project-based, offering short-term assignments with flexible schedules, ideal for those seeking variety or freelance work. Java Developers usually work full-time, with ongoing responsibilities and career development opportunities. Both roles require Java certifications and experience, but differ mainly in employment type and work environment.

What is a Java contract?

A Java contract job is a temporary position where a programmer is hired to work on projects using the Java programming language for a fixed period, rather than as a permanent employee. Contractors are often brought in to fill skill gaps, complete specific projects, or handle increased workloads. These roles can be full-time or part-time and typically last from a few months to over a year, depending on the project's needs. Contractors may work onsite or remotely and are usually paid hourly or by project milestone. Java contract jobs offer flexibility and the opportunity to work with a variety of companies and technologies.
What job categories do people searching Java Contract jobs in Oshawa, ON look for? The top searched job categories for Java Contract jobs in Oshawa, ON are:
What cities near Oshawa, ON are hiring for Java Contract jobs? Cities near Oshawa, ON with the most Java Contract job openings:
Java Contract jobs near you
Infographic showing various Java Contract job openings in Oshawa, ON as of August 2026, with employment types broken down into 1% Internship, 86% Full Time, 2% Part Time, and 11% Contract. Highlights an 83% Physical, 6% Hybrid, and 11% Remote job distribution.

RQ00738 - Software Developer - Full Stack - Senior

Source Code

Toronto, ON • Hybrid

Contractor

Posted 4 days ago

Job description

RQ00738 - Software Developer - Full Stack - Senior

Location: Toronto (525 University Avenue) - Hybrid

Duration: 8 months contract (164 Business Days) + possible extension

Must Haves:

  • Senior Full Stack software development experience delivering complex healthcare, cloud, integration, or digital health modernization projects.
  • Extensive Java and Spring Boot microservices development experience.
  • Experience designing and developing REST APIs and FHIR APIs.
  • Hands-on experience with Smile CDR implementation and customization.
  • Experience with AWS HealthLake and FHIR repository implementation.
  • Experience developing healthcare interoperability solutions using FHIR R4/R4B, SMART on FHIR, HL7v2, OAuth2/OIDC, and JWT.
  • Experience integrating healthcare applications with Provider Registry, Master Data Management systems, and the EPIC EHR, Meditech and Cerner
  • Experience with Central Intake hubs such as RICOH and Novari
  • Experience implementing advanced provider directory search using OpenSearch or Elasticsearch.

Public Sector Experience: Must Have

Background Information:

The Agency is expanding the Provincial Health Services Directory (PHSD) to incorporate artificial intelligence capabilities that improve provider discovery, referral quality, and healthcare navigation across provincial digital health applications. The solution will utilize PHSD provider, practitioner, organization, healthcare service, specialty, location, and service metadata together with clinical referral context to provide intelligent recommendations while maintaining traceability to authoritative source data. AI agents will consume PHSD FHIR APIs, Smile CDR, AWS HealthLake, the Agency Master Data Management, and other provincial digital health assets to provide grounded responses rather than generative opinions. The project includes development of reusable AI services, MCP servers, semantic search capabilities, vector-based retrieval, prompt orchestration, evaluation frameworks, and secure integration with SMART on FHIR applications and provincial healthcare systems. The implementation will emphasize explainability, auditability, privacy, security, and clinical confidence while supporting future AI-enabled healthcare workflows across the Agency.

Must Haves:

  • Senior Full Stack software development experience delivering complex healthcare, cloud, integration, or digital health modernization projects.
  • Extensive Java and Spring Boot microservices development experience.
  • Experience designing and developing REST APIs and FHIR APIs.
  • Hands-on experience with Smile CDR implementation and customization.
  • Experience with AWS HealthLake and FHIR repository implementation.
  • Experience developing healthcare interoperability solutions using FHIR R4/R4B, SMART on FHIR, HL7v2, OAuth2/OIDC, and JWT.
  • Experience integrating healthcare applications with Provider Registry, Master Data Management systems, and the EPIC EHR, Meditech and Cerner
  • Experience with Central Intake hubs such as RICOH and Novari
  • Experience implementing advanced provider directory search using OpenSearch or Elasticsearch.
  • Experience with PostgreSQL and healthcare data modelling.
  • Experience using AWS services including ECS, Lambda, API Gateway, S3, SNS, SQS, EventBridge, CloudWatch, IAM, Secrets Manager, and CloudFormation or CDK.
  • Experience developing secure APIs using OAuth2, OpenID Connect, JWT, RBAC, and confidential client authentication.
  • Excellent communication, documentation, and stakeholder collaboration skills

Responsibilities:

  • Design, develop, maintain, and support PHSD backend services using Java and Spring Boot.
  • Develop and enhance React-based user interfaces supporting provider search, directory management, and administration.
  • Design and implement FHIR R4/R4B APIs using Smile CDR and AWS HealthLake.
  • Develop real-time provider data synchronization between PHSD and the Agency master data management platforms.
  • Design and implement integrations with Provider Registry, hospital information systems, and provincial healthcare services.
  • Build scalable healthcare search capabilities using OpenSearch and FHIR search standards.
  • Design, develop, and maintain REST APIs supporting internal and external consuming applications.
  • Implement SMART on FHIR authentication and authorization workflows.
  • Develop secure OAuth2/OIDC authentication and JWT authorization services.
  • Implement healthcare interoperability using HL7v2 and FHIR messaging patterns.
  • Design scalable cloud-native AWS architectures supporting high availability and operational resilience.
  • Develop data transformation, validation, synchronization, and governance services supporting provider, practitioner, organization, healthcare service, and location information.
  • Participate in architecture reviews, technical design sessions, sprint planning, backlog refinement, and code reviews.
  • Support automated testing, CI/CD deployment pipelines, production releases, troubleshooting, and operational support.
  • Produce technical documentation, API specifications, deployment documentation, and knowledge transfer materials.

Desired Skills:

  • Experience implementing or supporting provider directory solutions.
  • Experience integrating with hospital information systems including Epic, Oracle Health (Cerner), MEDITECH, or other Canadian EMRs.
  • Experience implementing provider, practitioner, organization, location, and healthcare service master data management solutions.
  • Experience implementing healthcare search platforms using OpenSearch for provider and service discovery.
  • Experience with FHIR Subscriptions, FHIR Messaging, EventBridge, SNS, and SQS for event-driven healthcare integration.
  • Experience validating FHIR implementations using Inferno, Touchstone, or other interoperability testing frameworks.
  • Experience configuring and supporting AWS HealthLake, Smile CDR, and healthcare interoperability platforms.
  • Experience implementing secure SMART on FHIR applications, confidential clients, and backend services.
  • Experience designing highly available AWS architectures using ECS, Lambda, API Gateway, CloudFront, S3, Aurora PostgreSQL, and CloudWatch.
  • Experience implementing monitoring, logging, auditing, and operational support using AWS CloudWatch and related AWS services.

Required Skills:

  • Strong software development experience using Java, Spring Boot, React, TypeScript, and modern enterprise application development practices.
  • Experience designing, developing, securing, and supporting RESTful APIs and distributed microservice architectures.
  • Experience implementing healthcare interoperability solutions using FHIR R4/R4B, HL7 v2, SMART on FHIR, and healthcare messaging standards.
  • Experience developing and configuring Smile CDR FHIR repositories, transactions, validation, search, and interoperability services.
  • Experience implementing healthcare data solutions using AWS HealthLake and integrating healthcare data across multiple systems.
  • Experience developing secure authentication and authorization solutions using OAuth 2.0, OpenID Connect (OIDC), JWT, and role based access control.
  • Experience integrating healthcare applications with Provider Registry, Master Data Management platforms, hospital information systems
  • Experience implementing advanced provider and service directory search capabilities using OpenSearch.
  • Experience designing and developing cloud native applications using AWS services including ECS, Lambda, API Gateway, S3, EventBridge, SNS, SQS, IAM, CloudWatch, and Secrets Manager.
  • Experience developing data synchronization, transformation, validation, and governance services supporting provider, practitioner, organization, location, and healthcare service data.
  • Experience with PostgreSQL database design, performance optimization, and data modelling.
  • Experience using Git, GitHub, GitHub Actions, automated testing, CI/CD pipelines, and modern DevOps practices.
  • Strong analytical, problem solving, technical documentation, and communication skills with the ability to collaborate effectively across architecture, operations, interoperability, and business teams.

AI Disclaimer: Source Code may use artificial intelligence (AI) tools to assist in certain aspects of its recruiting and business operations.

Note: The higher end of the range is intended for absolutely exceptional candidates who meet all must-have requirements and most or all nice-to-have qualifications. The client will evaluate candidates based on both rate expectations and overall skill set when shortlisting.

INCORPORATED RATE RANGE (7.25 billable hours per day)

  • $90.21/hr - $108.25/hr Inc.

T4 RATE RANGE (7.25 billable hours per day)

  • $72.17/hr - $86.60/hr T4