Senior React/.NET/SQL Server Full Stack Developer - Vice President (Mississauga)

We are looking for a talented Full‑Stack Software Developer to join the Client Technology Group.

Job Overview

Design, develop, and maintain web applications using .NET/C#, React, and SQL Server, and contribute to Generative AI initiatives using Python.

Responsibilities

• Develop and maintain web applications using .NET Core/Framework and C# for back‑end functionality.
• Build responsive, user‑friendly front‑end interfaces with React (version 16+).
• Design and optimize SQL Server databases, writing efficient queries and stored procedures.
• Contribute to Generative AI projects by leveraging Python for data processing, scripting, or model integration.
• Collaborate with product managers, data scientists, and developers to deliver high‑quality solutions.
• Write clean, maintainable, and well‑documented code following best practices.
• Debug and resolve technical issues across the stack, from UI to database.
• Participate in code reviews and share knowledge to elevate team performance.
• Integrate APIs, third‑party services, and emerging AI tools as needed.
• Stay current with industry trends and propose enhancements to our tech stack.
• Provide critical technical and business support for Citi Applications, delivering swift resolutions to issues and ensuring system stability.
• Serve as a key liaison between business and internal technology teams, fostering collaboration and acting as a mentor and advisor to junior analysts.
• Lead and participate in the full application release lifecycle, from development and testing through deployment and post‑release validation, ensuring seamless transitions and maintaining comprehensive technical documentation.
• Maintain application systems that have completed the development stage and are running in daily operations.
• Manage, maintain and support applications and their operating environments, focusing on stability, quality, and functionality against service‑level expectations.
• Assist in assessing risks when business decisions are made, demonstrating consideration for the firm’s reputation and safeguarding Citigroup, its clients and assets by driving compliance with applicable laws, rules and regulations, and adherence to policy.

Qualifications

• 6+ years of professional experience in full‑stack development.
• Proficiency in .NET Core or .NET Framework and C# for server‑side development.
• Solid knowledge of SQL Server, including database design, queries, code development, and optimization.
• Hands‑on experience with Python (scripting, data manipulation, or API handling).
• Familiarity with RESTful API and KAFKA development and integration.
• Competence in HTML5, CSS3, and JavaScript.
• Experience with version control systems (Git).
• Strong problem‑solving skills and ability to work both independently and collaboratively.
• Good communication skills and eagerness to learn new technologies.
• Strong experience with React (2+ years preferred) for front‑end development.
• Exposure to Generative AI concepts or tools (LLMs, NLP) – nice‑to‑have.
• Experience with containerization with Kubernetes or OpenShift/ECS – nice‑to‑have.
• Familiarity with unit testing frameworks (xUnit, NUnit, Jasmine, or pytest).
• Understanding of Agile/Scrum methodologies or CI/CD practices.

Education

Bachelor’s/University degree or equivalent experience.

Notice

Automated Processing and AI: We use automated processing, including artificial intelligence, for legitimate business interests to identify and align candidates’ skills and abilities with a specific job opening. All hiring decisions are ultimately conducted and determined by individuals. This process does not involve autonomous decision‑making.