Mid Level Java Developer Jobs in Toronto, ON (NOW HIRING)

We are seeking a highly skilled and experienced Senior Java Engineer to join our dynamic team. The ideal candidate will be a technical leader, proficient in modern full-stack development, and passionate about leveraging cutting-edge AI tools and methodologies to build innovative and robust enterprise solutions.

Responsibilities

• Write clean, secure, and highly performant Java code using Spring Boot and related frameworks, adhering to best practices and coding standards.
• Build modern, responsive front-end interfaces with a focus on user experience and robust, scalable RESTful APIs.
• Lead architectural decisions, perform comprehensive code reviews, and mentor junior and mid-level developers, fostering a culture of technical excellence.
• Collaborate closely with product managers and UI/UX designers to translate complex requirements into elegant and efficient technical solutions.
• Champion continuous integration/continuous deployment (CI/CD) practices and oversee automated cloud deployments on platforms like AWS/GCP.
• Actively utilize AI-powered development tools such as GitHub Copilot, Devin, Claude Code, and Cursor to accelerate development, improve code quality, and assist in debugging and refactoring efforts.
• Contribute to the design and implementation of AI/ML integration patterns within applications, understanding the lifecycle of LLM-powered features.
• Explore and integrate new AI technologies and frameworks to enhance application capabilities and developer productivity.

Skills

• Backend: Advanced proficiency in Core Java, Spring Boot, microservices architecture, and asynchronous programming. Experience with performance tuning and optimization.
• Frontend: Strong expertise in JavaScript (ES6+), TypeScript, and modern frameworks (e.g., React or Angular). Solid understanding of responsive design principles and front-end build tools.
• Databases: Extensive experience with relational (SQL Server, PostgreSQL, Oracle) and non-relational (MongoDB, Cassandra) databases, including schema design, query optimization, and data migration strategies.
• DevOps & Cloud: Proficiency with Docker, Kubernetes, and experience with cloud platforms (e.g., AWS, Azure, GCP), including OpenShift.
• Version Control: Expert-level knowledge of Github and branching strategies.
• AI/ML & Tooling:
  • Demonstrated experience with AI-powered development tools (e.g., GitHub Copilot, Devin, Claude Code, Cursor) for code generation, debugging, and refactoring.
  • Fundamental understanding of Large Language Models (LLMs) and their application in software development.
  • Proficiency in Python for scripting, data processing, and integration with AI/ML frameworks.
  • Hands-on experience with Generative AI concepts, Large Language Models (LLMs), transformer architectures, RAG, and advanced agentic frameworks such as Google ADK(preferred),  LangChain, LangGraph,. 
• Soft Skills: Exceptional problem-solving abilities, strong communication, technical leadership, mentorship, and a proactive approach to continuous learning and innovation.

Experience

• 6+ years of professional software engineering experience, with at least 3 years focused on modern full-stack development.
• Proven track record of successfully designing, deploying, and maintaining high-scale, customer-facing applications in production environments.
• Experience taking ownership of key project areas, driving technical initiatives, and leading cross-functional teams.
• Prior experience integrating or working with AI/ML components or services is highly desirable.

Education

• Bachelor’s or Master’s degree in Computer Science, Software Engineering, or an equivalent technical field.

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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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This job opening is for an existing job vacancy.

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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.

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