We are looking for a highly skilled and hands‑on Software Engineer to drive contemporary engineering practices and technology transformation within the back‑office trading application. You will play a critical role in designing, developing, and maintaining scalable, high‑quality software solutions while ensuring best‑in‑class engineering standards, including trunk‑based development, test automation, security, and modern ways of working. This role requires deep expertise in system design, hands‑on coding, and strong problem‑solving skills to create resilient, high‑performing, and secure applications.

Responsibilities - Design, develop, and maintain robust, scalable, and high-performance applications.

- Implement trunk‑based development practices to enable continuous integration and rapid delivery.
- Develop clean, maintainable, and testable code following SOLID principles and software design best practices.
- Ensure high levels of unit test coverage, test‑driven development (TDD), and behavior‑driven development (BDD).
- Actively contribute to hands‑on coding, code reviews, and refactoring to maintain high engineering standards.
- Drive the adoption of modern engineering ways of working, including Agile, DevOps, and CI/CD.
- Advocate for automated testing, infrastructure as code, and continuous monitoring to enhance software reliability.
- Apply Behavior‑Driven Development (BDD), Test‑Driven Development (TDD), and unit testing to ensure code quality and functionality.
- Conduct thorough code reviews, ensuring adherence to best practices in readability, performance, and security.
- Implement and enforce secure coding practices, performing vulnerability assessments and ensuring compliance with security standards.
- Collaborate effectively in agile environments, embracing DevOps principles and fostering a culture of continuous delivery and improvement.
- Partner with architects, product owners, and cross‑functional teams to design scalable and distributed systems.
- Mentor junior engineers and foster a culture of engineering excellence and continuous learning.
- Collaborate closely with DevOps teams to optimize deployments, observability, and production resilience.
- Lead technical discussions,



contribute to design documentation, and provide guidance on modern software architectures.
- Conduct tasks related to feasibility studies, time and cost estimates, IT planning, risk technology, applications development, model development, and establish and implement new or revised application systems and programs to meet specific business needs or user areas.
- Monitor and control all phases of development process and analysis, design, construction, testing, and implementation, as well as provide user and operational support on applications to business users.
- Utilize in‑depth specialty knowledge of applications development to analyze complex problems/issues, provide evaluation of business process, system process, and industry standards, and make evaluative judgement.
- Recommend and develop security measures in post‑implementation analysis of business usage to ensure successful system design and functionality.
- Consult with users/clients and other technology groups on issues, recommend advanced programming solutions, and install and assist customer exposure systems.
- Ensure essential procedures are followed and help define operating standards and processes.
- Serve as advisor or coach to new or lower level analysts.
- Operate with a limited level of direct supervision, exercise independence of judgement and autonomy.
- Act as SME to senior stakeholders and/or other team members.
- Appropriately assess risk when business decisions are made, demonstrating particular consideration for the firm’s reputation and safeguarding Citigroup, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to policy, applying sound ethical judgement regarding personal behavior, conduct and business practices, and escalating, managing and reporting control issues with transparency.

Recommended





Qualifications - 5-8 years of relevant experience.

- Experience in systems analysis and programming of software applications.
- Experience in managing and implementing successful projects.
- Working knowledge of consulting/project management techniques/methods.
- Ability to work under pressure and manage deadlines or unexpected changes in expectations or requirements.

Required Skills - Strong hands‑on experience in coding (Kotlin, Java, Python).

- Deep expertise in system design and microservices architecture:
- SpringBoot, Openshift.
- Event‑Driven & Messaging Systems (Kafka, Solace, Tibco, MQ).
- Low‑Latency & High‑Performance Computing.
- High Availability & Fault Tolerance.
- Database - SQL (Oracle).
- Experience with trunk‑based development, feature flags, and progressive delivery strategies.
- Proficiency in TDD, BDD, and automation‑first mindset to ensure high test coverage and reliability.
- Strong understanding of CI/CD pipelines, and DevOps practices.
- Experience conducting code reviews, vulnerability assessments, and secure coding.
- Familiarity with modern cloud‑native technologies (Kubernetes, Docker).
- Excellent problem‑solving skills and ability to work in fast‑paced, agile environments.
- Strong communication and collaboration skills. Good‑to‑Have Skills - Experience with event‑driven architecture and distributed systems.
- Knowledge of performance tuning, observability, and production monitoring.
- Familiarity with Agile frameworks and modern ways of working in product development.

Education - Bachelor’s degree/University degree or equivalent experience. This provides a high‑level review of the types of work performed. Other job‑related duties may be assigned as required.

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. If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career prospect, please review Accessibility at Citi.

📌 Trading Systems Engineer (Mississauga)
🏢 Citi
📍 Mississauga