Sr .NET /C# Engineer, TD Securities

TD•Toronto, ON

2d•CA$126,800 - CA$164,100•Onsite

About The Position

The Global FICC Technology group aims to drive business growth for our partners in the Front-Office, Operations and beyond. We do this with a mandate of delivering innovative new products, expanding our trading tool capabilities and modernizing critical platforms. We are growth-oriented, people-focused, and community-minded. As a team, we work to deliver value for our clients every day. The Energy Technology team builds and operates the digital and real‑time platforms that power trading and client connectivity across the Energy trading business. We sit at the intersection of trading, real‑time systems, automation, and market connectivity, delivering technology that directly enables automated trading workflows, accelerates new business ideas, and integrates seamlessly with internal and external market infrastructure. We own our systems front‑to‑back — from low‑latency services and real‑time data flows through to the user interfaces used daily on trading desks. While our platforms are technically demanding and mission‑critical, the quality of our user experience is equally important. The interfaces we build are highly visible, widely used by Sales and Trading, and consistently praised for their clarity, performance, and design — giving engineers rare, direct feedback and recognition for their work. The team operates as a small, high‑performing engineering unit with a strong culture of ownership and accountability. Engineers are trusted to lead meaningful workstreams end‑to‑end: shaping problem statements with the business, designing architecture, producing high quality code, and delivering production systems that support live trading activity. This is an environment for engineers who want to take responsibility, make decisions, and see the real‑world impact of their work.

Requirements

5+ years of professional hands-on software development experience, building and operating critical production systems.
Desire to act as a true “asset owner” — accountable for the design, delivery, and production operation of critical systems, including on-call support and continuous improvement of system reliability (across both software and underlying infrastructure)
Strong proficiency in C#/.NET, and/or C++, including experience building high-performance backend services.
Basic Java experience is a plus
Demonstrated experience delivering distributed or event-driven systems in a production environment.
Experience designing and implementing low latency OR real-time systems, ideally within financial markets, trading or exchanges.
Familiarity with electronic trading infrastructure, such as FIX connectivity, market data processing, or order management workflows.
Experience working with messaging or streaming technologies (eg, Kafka, Aeron, Solace, etc).
Proven ability to own technical workstreams end-to-end, including design, implementation, deployment and production support tooling.
Strong understanding of software engineering best practices, including system design, performance optimization, observability and operational resilience.
Experience collaborating with cross-functional teams including trading desks, product owners, and other engineering groups.
Excellent oral and written communication skills.
Proven ability to thrive in a collaborative environment involving different stakeholders and subject matter experts.
Ability to use strong communication skills to drive technical decisions across multiple stakeholders.

Nice To Haves

Experience beyond the baseline requirements, particularly in complex or high-throughput environments.
Experience supporting live trading systems, with the ability to operate effectively in a fast-paced environment where requirements evolve quickly and decisions must balance speed, risk, and correctness.
A personal website/portfolio showcasing side projects or an interest in coding outside of work hours.
Curiosity and passion to stay updated with the latest trends and advancements in your domain.
A decent understanding of financial markets would be a plus – specifically around commodities, world markets, and politics.
High attention to detail and a desire to deliver a next-gen experience for our partners in the Front-Office and beyond.
Enjoys working in an engaging, dynamic, fast-paced environment with talented peers and direct platform ownership.

Responsibilities

Lead the design, development, and maintenance of robust, scalable backend services and APIs using C#/.NET, C++ - supporting critical platforms such as real-time risk/calculation engines, critical regulatory reporting, MS-SQL, and some legacy codebases.
Participate in production support (including occasional time-sensitive incidents outside standard operating hours), respond to issues with urgency, and design systems with a strong focus on resilience, observability, and recoverability.
Architect and implement high-performance, secure, and maintainable server-side solutions, integrating with relational databases (MS and Azure SQL Servers), and ensuring seamless connectivity with front-end applications.
Collaborate closely with business stakeholders in the Commodities Energy domain within Capital Markets to translate complex business requirements into technical solutions, ensuring alignment with organizational goals.
Design and implement solutions for both on-premises and Azure cloud environments, leveraging best practices for hybrid infrastructure.
Oversee backend development efforts across multiple projects, ensuring consistency, code reuse, and effective communication within the team.
Troubleshoot and resolve complex production issues, driving root cause analysis and implementing long-term solutions to enhance system stability and reliability.
Champion the adoption of modern DevOps practices, including CI/CD pipelines (TeamCity, GitHub), automated testing frameworks, and deployment strategies to improve development efficiency and code quality.
Ensure backend components are designed for extensibility, security, and compliance with enterprise standards, while adhering to industry best practices.
Contribute to the evolution of the backend architecture, evaluating and integrating new technologies to keep the platform at the forefront of industry trends.
Actively participate in code reviews, technical discussions, and architectural decisions to ensure high-quality deliverables.
Stay updated on emerging technologies and frameworks in the Commodities ecosystem, providing recommendations for continuous improvement and innovation.