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Open Systems Technologies
Full Stack Engineer

Full Stack Engineer

Hybrid

Mississauga, Canada

Senior

Freelance

18-09-2025

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Skills

Java JavaScript Jira SQL Test Agile methodologies Architecture react Software Development Agile Spring HTML5

Job Specifications

Full Stack Java React Developer

The role is to

* Analyze and understand existing programs, job flows, and components

* Perform program design, development, and code management

* Perform unit, integration and parallel testing

* Assist in investigating production issues and provide solutions

* Design reusable frameworks

* Work with multiple teams in different locations and time zones

* Review test and debug team members' work

* Write well designed efficient code

* Document solutions to issues and business and testing requirements using JIRA

Job requirements

* Bachelor's degree Computer Science/Engineering or related field or equivalent experience

* 10+ years of software development experience

* Excellent J2EE/React development skills

* Strong working knowledge of enterprise level architecture web services, data, and application layers

Technical Requirements:

* Strong experience in Web technologies including HTML5, React, JavaScript

* Strong experience in core java and server side development using Spring

* Strong experience with writing middle-ware for multiuser, multithreading application.

* Good experience developing REST services

* Good experience with Unit testing and mocking frameworks and TDD.

* Familiarity with Agile methodologies desirable

* Familiarity with Oracle SQL Writing, performance tuning desirable

About the Company

Open Systems Technologies is a tier-one vendor for the world's most competitive financial and technology companies, offering both full-time and contract recruiting services across the country. We offer a positive, entrepreneurial, high performing culture where all employees have the unique opportunity to run a full desk. Our office looks, feels, and operates like a start-up, but with the stability, clientele, and resources that only an industry veteran can provide. At our core, we are structured to be flexible. With over 3... Know more