Mississauga, On Java + python backend developer Jobs – 86 Openings This Week

Java Full Stack Developer - React JS - Assistant Vice President
Citi —Mississauga, ON
- $94,300–$141,500 a year
- Full-time
- Hybrid work
- Computer Science
- Engineering
- SQL
1d
Systems Testing/QA Specialist
Softline Technology —Toronto, ON
- Contract
- Software troubleshooting
- Java
- Databases
10h
Principal Associate Software Engineer - International Card Tech - Full-Stack
Capital One —Toronto, ON
- Full-time
- Hybrid work
- Computer Science
- Engineering
- Java
2h
TECHNICAL LEAD L1
Wipro Limited —Toronto, ON
- Software troubleshooting
- Java
- SQL
1d

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Java Full Stack Developer - React JS - Assistant Vice President

Citi -
Mississauga, ON

Apply Now

Job details

Full-time
$94,300–$141,500 a year
1 day ago

Qualifications

Web accessibility
Spring Boot
Responsive design
Automated build pipelines
Data integration
Gradle
Computer Science
CSS
JUnit
Continuous Delivery (CD) implementation
React
RESTful API
Engineering
NoSQL
Git
MongoDB
Microservices
SQL
Event-driven architecture
Bachelor's
PostgreSQL
Version control systems
Back-end development
Angular
GitHub
Red Hat OpenShift
Agile
Information processing
React.js
Grafana
Kafka
Unit testing
SSIS
Maven
AI
Software development or architecture experience
TypeScript
Python
Debugging
HTML
Pipeline

Full job description

Discover your future at Citi

Working at Citi is far more than just a job. A career with us means joining a team of approximately 219,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact.

Job Overview

Job Overview

The position is for a senior full-stack developer with 6-8 years of experience, specializing in building enterprise-scale applications. This role is suited for a strong React-focused full stack developer with prior experience in Angular and Java-based backend systems, contributing to modern, scalable, and cloud-native applications.

Responsibilities

Design, develop, and maintain scalable full stack applications with a focus on React.js and modern UI architecture

Core Skills: Expert-level proficiency in modern JavaScript frameworks (React.js/Angular), JavaScript (ES6+), TypeScript, HTML5, and CSS3.

Modernize legacy Angular applications into React-based solutions

Develop backend services using Java (17+), Spring Boot, and microservices architecture

Proven experience building RESTful web services and API gateways, such as Apigee

Build and maintain event-driven data pipelines with real-time data processing using Kafka.

Database Integration: Integrate applications with both SQL (Oracle, PostgreSQL) and NoSQL databases, utilizing caching solutions where appropriate.

Proficiency with version control systems such as Git, GitHub, or Bitbucket.

Experience with CI/CD tools like Jenkins, Harness or Tekton.

Integrate with Oracle and NoSQL databases (MongoDB)

Standards: Knowledge of responsive design principles, accessibility (ADA compliance), and end-to-end UI deployment strategies.

Proficiency with build tools like Maven or Gradle and unit testing frameworks (e.g., JUnit, Mockito).

Support CI/CD pipelines using Jenkins, TeamCity, or similar tools

Work with Docker, Kubernetes, and OpenShift for containerized deployments

Use AI-assisted development tools (e.g., GitHub Copilot) to enhance productivity

Monitor applications using ELK, Grafana, and resolve production issues

Demonstrated ability to build and maintain large-scale data processing applications.

Preferred Skills (Good to Have)

Experience with data virtualization systems like Starburst.

Experience with Python for scripting or data manipulation.

Experience with QA automation frameworks and strategies for large-scale data processing.

Familiarity with job scheduling tools like Autosys or ETL processes like SSIS.

Experience with AI coding assistants

Qualifications

5–8 years of experience in full stack development

Strong coding, problem-solving, and debugging skills

Experience working in Agile and global team environments

Education

Bachelor’s degree in computer science, Engineering, or equivalent experience

Job Family Group:

Technology

Job Family:

Applications Development

Time Type:

Full time

Primary Location Full Time Salary Range:

$94,300.00 - $141,500.00

Most Relevant Skills

Please see the requirements listed above.

Other Relevant Skills

For complementary skills, please see above and/or contact the recruiter.

Automated Processing and AI

We use automated processing, including artificial intelligence, for our legitimate business interests (or our reasonable and appropriate business purposes) to identify and align the candidate's skills and abilities with a specific job opening. Additionally, if you so choose, or consent, we can match your skills and abilities to other suitable roles at Citi.

Importantly, all our hiring processes and decisions, including determining your suitability for a role, are conducted, checked, and decided by individuals. Our automated processing and AI do not involve relying on automatic or autonomous decision-making. Please refer to any Jurisdictional Considerations, with specific provisions for your country (where relevant) for further details.

This job opening is for an existing job vacancy.

Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

Apply Now

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java + python backend developer jobs in mississauga, on

Java Full Stack Developer - React JS - Assistant Vice President

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Principal Associate Software Engineer - International Card Tech - Full-Stack

TECHNICAL LEAD L1