Senior Full Stack Developer - React & Java

Rose International; Mississauga; Hybrid; CAD 96,000 - 103,000; Full time

Job summary

Rose International in Toronto is seeking a Senior Full Stack Developer specializing in React and Java to design, develop, and integrate scalable applications. The role focuses on end-to-end delivery with emphasis on API integrations and microservices across front-end and back-end components.

You will own development lifecycle from requirements to deployment, mentor junior developers, and collaborate with stakeholders while adhering to governance standards and regulatory requirements.

Qualifications

• 7–10+ years of experience in application development.
• Proficient in React; candidates with strong React experience can transition to Angular. Angular experience is not required.
• Strong hands-on experience with Java and Spring Boot, with an understanding of Core Java sufficient to review and understand existing code and integrate APIs.
• Experience with microservices from an integration perspective.
• Strong experience with API integration, including understanding requirements, reviewing code, and integrating APIs effectively.
• Understanding of application structure and programming fundamentals, with the ability to develop efficiently.
• Ability to work independently and take ownership of the full development cycle, from understanding user requirements and design through development and deployment.
• Ability to use AI development tools such as Copilot, Devin, and similar tools.
• Self-motivated with the attitude and ability to take work through to completion.
• Experience with code reviews, testing strategies, deployment processes, code quality, performance optimization, and application scalability.
• Strong communication and stakeholder collaboration skills.
• Ability to identify risks and work within governance and regulatory requirements.

Responsibilities

• Understand user requirements and translate them into application solutions.
• Design and develop complex full stack applications using Java and front-end technologies.
• Own end-to-end delivery of application components from design through deployment.
• Develop and integrate APIs and review existing code to understand and implement required integrations.
• Drive appropriate technical and design decisions while aligning solutions with enterprise standards.
• Resolve high-impact technical challenges across systems and platforms.
• Work independently and take ownership of development activities through completion.
• Mentor junior and mid-level developers by explaining requirements and coding practices, assigning code, reviewing work, and providing technical guidance.
• Partner with stakeholders to define system enhancements and solutions.
• Ensure code quality, performance optimization, and scalability.
• Lead or contribute to testing strategies, code reviews, and deployment processes.
• Identify risks and ensure compliance with governance and regulatory requirements.
• Only those lawfully authorized to work in the designated country associated with the position will be considered.
• Please note that all Position start dates and duration are estimates and may be reduced or lengthened based upon a client’s business needs and requirements.

Skills

API

Banking/Financial

Java

Microservices

React

Spring Boot

SQL

Education

Bachelor's Degree

Job description

Date Posted: 09/18/2026
Hiring Organization: Rose International
Position Number: 507758
Industry: Financial Services
Job Title: Senior Full Stack Developer - React & Java
Job Location: Toronto, ON, Canada, M5E 1G6
Work Model: Hybrid
Work Model Details: 3 days onsite and 2 days remote per week.
Shift: Standard Working Hours
Employment Type: Temp to Hire
FT/PT: Full-Time
Estimated Duration (In months): 6
Min Hourly Rate($): 70.00
Max Hourly Rate($): 75.00
Must Have Skills/Attributes: API, Banking/Financial, Java, Microservices, React, Spring Boot, SQL
Experience Desired: Experience in React-based frontend development and API integration (7-10+ yrs); Experience with Java, Spring Boot, and microservices integration (7-10+ yrs); Experience with full-cycle development and mentoring junior developers (7+ yrs)
Required Minimum Education: Bachelor’s Degree
C2C is not available

Job Description

Required Education//Certifications

• Bachelor’s degree or equivalent experience.

Required Skills, Experience, & Abilities

• 7–10+ years of experience in application development.
• Proficient in React; candidates with strong React experience can transition to Angular. Angular experience is not required.
• Strong hands-on experience with Java and Spring Boot, with an understanding of Core Java sufficient to review and understand existing code and integrate APIs.
• Experience with microservices from an integration perspective.
• Strong experience with API integration, including understanding requirements, reviewing code, and integrating APIs effectively.
• Understanding of application structure and programming fundamentals, with the ability to develop efficiently.
• Ability to work independently and take ownership of the full development cycle, from understanding user requirements and design through development and deployment.
• Ability to use AI development tools such as Copilot, Devin, and similar tools.
• Self-motivated with the attitude and ability to take work through to completion.
• Experience with code reviews, testing strategies, deployment processes, code quality, performance optimization, and application scalability.
• Strong communication and stakeholder collaboration skills.
• Ability to identify risks and work within governance and regulatory requirements.

Desired Skills, Experience, & Abilities

• Experience with Angular.
• Strong experience with SQL and distributed systems.
• Experience with CI/CD pipelines, cloud platforms, and DevOps practices.
• Experience mentoring junior and mid-level developers by explaining concepts, assigning code, reviewing work, and guiding developers toward effective coding practices.
• Experience leading technical initiatives and influencing development best practices.

Overview

The Applications Development Lead Programmer Analyst (C13) is a senior hands-on development role focused on building scalable Java and front-end solutions and delivering application components through the full development lifecycle. The role requires independent developers who can understand user requirements, contribute to design, develop solutions, integrate APIs, review and understand existing code, and take ownership through deployment and completion. The position is primarily React-focused, with Angular experience not required for candidates who are proficient in React and able to transition to Angular. Developers should have strong programming fundamentals and understand application structure so they can work efficiently. The role also involves mentoring junior and mid-level developers through technical guidance, code assignment, code reviews, and coaching, rather than managing them. Candidates are expected to bring the technical skills, self-motivation, and ownership mindset needed to take initiatives to completion. The role is seeking developers rather than architects, with emphasis on hands-on application development, Java, Spring Boot, front-end development, API integration, and microservices integration.

Responsibilities

• Understand user requirements and translate them into application solutions.
• Design and develop complex full stack applications using Java and front-end technologies.
• Own end-to-end delivery of application components from design through deployment.
• Develop and integrate APIs and review existing code to understand and implement required integrations.
• Drive appropriate technical and design decisions while aligning solutions with enterprise standards.
• Resolve high-impact technical challenges across systems and platforms.
• Work independently and take ownership of development activities through completion.
• Mentor junior and mid-level developers by explaining requirements and coding practices, assigning code, reviewing work, and providing technical guidance.
• Partner with stakeholders to define system enhancements and solutions.
• Ensure code quality, performance optimization, and scalability.
• Lead or contribute to testing strategies, code reviews, and deployment processes.
• Identify risks and ensure compliance with governance and regulatory requirements.
• Only those lawfully authorized to work in the designated country associated with the position will be considered.
• Please note that all Position start dates and duration are estimates and may be reduced or lengthened based upon a client’s business needs and requirements.

Benefits

For information and details on employment benefits offered with this position, please visit here. Should you have any questions/concerns, please contact our HR Department via our secure website.

California Pay Equity

For information and details on pay equity laws in California, please visit the State of California Department of Industrial Relations' website here.

Rose International is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, age, sex, sexual orientation, gender (expression or identity), national origin, arrest and conviction records, disability, veteran status or any other characteristic protected by law. Positions located in San Francisco and Los Angeles, California will be administered in accordance with their respective Fair Chance Ordinances. If you need assistance in completing this application, or during any phase of the application, interview, hiring, or employment process, whether due to a disability or otherwise, please contact our HR Department. Rose International has an official agreement (ID #132522), effective June 30, 2008, with the U.S. Department of Homeland Security, U.S. Citizenship and Immigration Services, Employment Verification Program (E-Verify). (Posting required by OCGA 13/10-91.).