Java software engineer Jobs in Mississauga, ON

About the Role

We're looking for a senior engineer who thinks clearly across the full product development lifecycle, from design through to production, and brings an AI-first mindset to how they work.

This is a hands-on, senior individual contributor role with room to grow over time for the right person. You'll design, build, and ship real systems while setting an example for engineering quality - writing code and making architectural calls that others can learn from, not just talking about best practices.

What You'll Do

• Design and build backend services end to end - from requirements and architecture through implementation, testing, and delivery
• Apply strong engineering fundamentals: clean design, sound architecture, and a quality-first mindset in everything you build
• Champion openness and discoverability in your work - clear documentation, readable code, and decisions others can easily follow
• Use AI tools as a natural part of your daily workflow to work faster and better
• Review code and mentor engineers around you by example - through the quality of your work and how you approach problems
• Stay organized and dependable, able to take ownership of problems and drive them to resolution
• Quickly learn new parts of the stack or domain as needed, and bring that same adaptability to the team

Must-Have

• 6+ years of hands-on software engineering experience
• Strong experience with Java and Spring Boot
• Working knowledge of relational and/or NoSQL databases
• A quick-learning, adaptable approach to new technology and problems
• An AI-first mindset - comfortable using AI tools as part of daily engineering work
• Strong organizational skills and the ability to take ownership and lead by example
• Bachelor's degree or equivalent practical experience

Nice-to-Have

• 10+ years of experience, including architecture/design-level ownership
• Experience with microservices or event-driven architecture
• Front-end development experience (Angular, React, or similar)
• Experience with cloud-native or containerized environments
• Exposure to test automation practices
• Experience in financial services or other regulated industries

Why Join Us

• Work on systems with real scale and impact, where your contributions are visible and valued
• Start as a senior individual contributor, with the opportunity to grow as you establish yourself
• A team that takes engineering craft seriously and invests in how its engineers grow
• The chance to shape how AI-augmented engineering is done, from the ground up

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Job Family Group:

Technology

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Job Family:

Applications Development

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Time Type:

Full time

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Primary Location Full Time Salary Range:

$120, - $170,

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Most Relevant Skills

Please see the requirements listed above.

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Other Relevant Skills

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

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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.

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