Top Tech Jobs & Startup Jobs in Toronto

Architect and develop scalable Python backend systems using Generative AI, prompt engineering, RAG, and multimodal financial data analysis. Build resilient APIs on Kubernetes, optimize LLM production solutions, and integrate emerging AI frameworks. Collaborate with quantitative analysts, risk, compliance, and product teams to enhance market risk controls. Maintain high engineering standards through testing, peer reviews, CI/CD, architectural documentation, and technical research.

Leads the design, development, maintenance, and troubleshooting of Java applications using Spring Boot, microservices, REST APIs, Angular or React, databases, containers, and cloud platforms. Defines application standards, evaluates complex systems and business processes, guides architecture-aligned solutions, and supports software delivery improvements. Collaborates with technology teams and stakeholders, mentors developers, participates in code reviews, manages risks and compliance, and advises on system enhancements and new products.

Lead UI/UX application development for Citi’s global Fixed Income Trade Processing platform. Design and implement robust, testable code; improve system reliability, scalability, and performance; support microservices and automated CI/CD adoption; analyze complex business and technical problems; ensure architecture and coding standards; collaborate across teams; and mentor mid-level developers and analysts. The role focuses on HTML5, JavaScript, React, and Node.js, with financial products and AI coding tools as additional areas of exposure.

Lead the design, development, testing, deployment, and support of enterprise Java applications. Serve as a Java subject matter expert, conduct feasibility and estimation activities, define development standards, improve systems, and ensure security and compliance. Collaborate with business and technology teams, provide technical guidance, and mentor junior developers. The role requires expertise in Java, Spring Boot, cloud-native platforms, distributed systems, databases, messaging, CI/CD, Agile, and software engineering best practices.

Develop and own front-end solutions for a trade processing application supporting security financing transactions. Responsibilities include migrating legacy interfaces to React and HTML5, integrating APIs, implementing automated testing, analyzing technical problems, recommending security measures, supporting deployment, and collaborating with business and technology stakeholders. The role also involves estimating work, ensuring compliance, defining development standards, mentoring junior staff, and serving as a technical subject matter expert.

Develop scalable, user-focused web applications supporting Rates trading. Responsibilities include partnering with trading desks, designing UI architecture, coding, testing, integrating streaming feeds and REST APIs, improving SDLC practices, delivering complex technology projects, supporting production systems, and assessing technical and operational risks. The role requires strong financial-services collaboration, modern frontend and backend technology expertise, CI/CD experience, and knowledge of rates derivatives.

Lead the architecture and delivery of mission-critical cloud-native systems using Java, Spring, microservices, event-driven platforms, and distributed system patterns. Build secure, scalable services; establish engineering standards; mentor senior engineers; and guide teams through the full SDLC. Design cloud, data, integration, observability, CI/CD, infrastructure-as-code, and security solutions while partnering with product, platform, SRE, and business stakeholders. Provide technical leadership for architecture reviews, roadmaps, performance, resiliency, compliance, and emerging GenAI patterns.

Develop risk-modeling software and stress-testing pipelines for banking portfolios. Design graph-based computation frameworks, infrastructure APIs for grid computing and data storage, and reliable data-processing systems. Perform unit testing, improve pipeline quality, and contribute to model and data platform enhancements. The role requires strong programming fundamentals, Python expertise, compiled-language knowledge, numerical computing experience, and analytical problem-solving skills.

Own Citi’s Canadian domestic payments portfolio, including product vision, roadmap, P&L, pricing, commercialization, and modernization across real-time, batch, and legacy rails. Lead product teams, cross-functional delivery squads, industry advocacy, regulatory compliance, risk governance, incident management, and business continuity. Drive adoption of Real-Time Rail, ACSS, EFT, and Interac solutions while representing Citi with regulators, industry bodies, corporates, and financial institutions.

Develops and supports full-stack applications using Java, Spring Boot, REST APIs, and React or Angular. Responsibilities include application analysis, design, coding, testing, implementation, troubleshooting, performance optimization, security, and user support. The role works with Docker, SQL, CI/CD tools, application servers, automated testing frameworks, and version control. It also advises stakeholders, coaches junior analysts, manages risks and deadlines, and operates with limited supervision.