Mississauga, On Full stack java / api developer Jobs – 91 Openings This Week

Full Stack Developer - Toronto
Randstad —Toronto, ON
- Temporary
- Software troubleshooting
- Java
- Financial services
Quick apply
4d
SAP eCommerce Senior Developer
Tata Consultancy Services —Toronto, ON
- $100,000–$120,000 a year
- Java
- APIs
- Communication skills
Sr. Software Engineer, Backend
Pinterest —Toronto, ON
- Hybrid work
- Computer science
- Computer Science
- Java
Senior AWS Lambda (Java) Developer
Play Hockey —Canada
- From $80,000 a year
- Full-time
- Remote
- Computer Science
- DevOps
- Java
- Disability insurance
- Dental care
Quick apply

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Senior AWS Lambda (Java) Developer
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Play Hockey offers a competitive compensation package, benefits program, remote work, and a fun yet challenging work environment. Pay: From $80,000.00 per year.
From $80,000 a year
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Full Stack Developer - Toronto

Randstad -
Toronto, ON

Quick apply

Job details

Temporary
4 days ago

Qualifications

Software engineering
Automated build pipelines
Continuous Delivery (CD) implementation
Software troubleshooting
React
RESTful API
UNIX
Bloomberg
Data and database experience
Java
Microservices
PostgreSQL
Back-end development
Query optimization
GitHub
Financial services
React.js
Unit testing
AI
Multithreading
Software development or architecture experience
Debugging
Pipeline

Full job description

Our Toronto based client is looking for a
Full Stack Developer (Java / React / AI-Powered Systems) to join their team

Location: Toronto, ON (downtown.) — Hybrid (2 days/week on-site)

Contract Duration: 12 Months

Are you an engineer who lives in the IDE, thrives on shipping clean code, and loves seeing your work hit production?

We are looking for a Full Stack Developer to join a tight-knit, high-impact team building a next-generation, AI-driven Client Management Platform. We aren't looking for slide-deck architects or high-level delegates—we want active, hands-on coders who write unit tests, debug in KVM environments, review AI-generated code, and take true ownership of their software.

Advantages

Why You’ll Love This Role
Build Modern AI Tech: Work on a "one-stop-shop" platform that ingests live data streams (Outlook, Zoom, Symphony, Bloomberg) and leverages AI to auto-generate intelligence, summaries, and action items for business teams.

True "You Build It, You Own It" Culture: Experience full-cycle engineering. You’ll own your code from initial commit through CI/CD, testing, and production deployment.

Lean, High-Visibility Team: Join a nimble 5-person engineering pod with global support, where your code directly impacts the business every single day.

Collaborative Hybrid Environment: Downtown Toronto location with initial 2 days/week in-office collaboration.

Responsibilities
What You’ll Be Doing Daily
Writing & Reviewing Code: Hands-on development in Java (Java 21) microservices and React / JavaScript front-ends.

Integrating AI: Working with OpenAI APIs and GitHub Copilot—evaluating, debugging, and optimizing AI-driven components.

Managing Data: Architecting RESTful APIs and querying/optimizing PostgreSQL databases.

Linux & DevOps: Navigating Linux environments, checking DB data, and managing deployments via automated CI/CD pipelines.

Quality & Reliability: Writing robust automated unit and integration tests, tackling tech debt, and participating in pair coding and code reviews.

Qualifications
What We’re Looking For
Hands-on Experience: 3 to 6+ years of active, day-to-day software development experience (5 years is the sweet spot!).

Core Stack Proficiency: Strong expertise in Java (multithreading, microservices architecture) and modern JavaScript / React.

Database & API Skills: Solid hands-on experience with relational databases (PostgreSQL preferred) and RESTful API design.

Practical Linux & Infrastructure: Comfortable using basic Unix/Linux commands to inspect systems, check DB state, and debug KVM testing environments.

AI Tooling Awareness: Experience with or strong curiosity about OpenAI integrations and Copilot, including the ability to debug and evaluate AI-generated code.

Mindset: A pragmatic problem-solver who values secure engineering, automated testing, and safe, regular production releases.

Nice-to-Haves:

Experience in financial services, banking, or trading platforms (e.g., Bloomberg, Symphony integrations).

Exposure to modern DevOps practices and internal deployment tooling.

Summary
If you’re ready to solve real-world problems, work directly with modern AI tools like GitHub Copilot and OpenAI integrations, and take features from concept to production, we want to talk to you.

Randstad Canada is committed to fostering a workforce reflective of all peoples of Canada. As a result, we are committed to developing and implementing strategies to increase the equity, diversity and inclusion within the workplace by examining our internal policies, practices, and systems throughout the entire lifecycle of our workforce, including its recruitment, retention and advancement for all employees. In addition to our deep commitment to respecting human rights, we are dedicated to positive actions to affect change to ensure everyone has full participation in the workforce free from any barriers, systemic or otherwise, especially equity-seeking groups who are usually underrepresented in Canada's workforce, including those who identify as women or non-binary/gender non-conforming; Indigenous or Aboriginal Peoples; persons with disabilities (visible or invisible) and; members of visible minorities, racialized groups and the LGBTQ2+ community.

Randstad Canada is committed to creating and maintaining an inclusive and accessible workplace for all its candidates and employees by supporting their accessibility and accommodation needs throughout the employment lifecycle. We ask that all job applications please identify any accommodation requirements by sending an email to [email protected] to ensure their ability to fully participate in the interview process.

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full stack java / api developer jobs in mississauga, on

Full Stack Developer - Toronto

SAP eCommerce Senior Developer

Sr. Software Engineer, Backend

Senior AWS Lambda (Java) Developer

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