Senior software developer Jobs in Old toronto, ON

Venture outside the ordinary - TMX Careers

The TMX group of companies includes leading global exchanges such as the Toronto Stock Exchange, Montreal Exchange, and numerous innovative organizations enhancing capital markets. United as a global team, we’re connecting cross-functionally, traversing industries and geographies, moving opportunity into action, advancing global economic growth, and propelling progress. Through a rich exchange of ideas, meaningful collaboration, and a nimble operating model, we're powering some of the nation's most critical systems, fueling capital formation and innovation, bringing increased opportunity to business visionaries, product ingenuity to consumers, and career exploration to our team.

Ready to be part of the action?

We are looking for a Senior Software Developer who loves writing code but also enjoys thinking about how the entire system fits together. You will be a key player in our core development team, responsible for building end-to-end features while ensuring our technical architecture remains scalable and efficient.

This isn't just about finishing tickets; it's about helping us make the right technical choices—whether that’s designing a new database schema in SQL, choosing the right AWS container strategy, or leveraging AI agents to speed up our development lifecycle.

Key Responsibilities

• Writing clean, modular code using Python and C++ to deliver high-impact features.

• Helping design the blueprints for our applications, focusing on distributed systems, API performance, and cloud-native resilience.

• Implementing and managing Docker and Kubernetes workflows to ensure our applications run smoothly across our AWS environment.

• Design and manage complex data environments within Snowflake, ensuring optimized storage, query performance, and cost-efficient scaling

• Lead the design of robust SQL schemas that support both transactional application needs and complex analytical reporting

• Design and optimize SQL schemas that are built for growth and performance.

• Proactively use and integrate AI agentic tools (e.g., coding assistants, autonomous task runners) to automate repetitive work and accelerate feature delivery.

• Working closely with the cloud infrastructure team in supporting, maintaining and scaling our infrastructure across AWS (or Google Cloud/Azure).

Technical Requirements

• Core Languages: 5–7 years of experience with Python and C++.

• Architecture: Practical experience with system design patterns (Microservices, REST, Event-driven).

• Database: Strong proficiency in SQL and experience with relational database design.

• Cloud & Containers: Hands-on experience with AWS and container orchestration (Docker/K8s).

• Efficiency: A demonstrated ability to use AI-augmented tools to increase personal coding velocity and solve complex problems faster.

Nice to Have:

• Experience or familiarity with Snowflake, AWS Firehose, AWS Kinesis Agent, Tableau, Quicksight

• Ability to work in an Agile environment

• Kubernetes / container technologies

• Practical knowledge of the Google work environment (G Suite)

• Experience in the business area of equities and derivatives trading

Salary Range: 120,000/year - 130,000/year CAD. Please note that the salary range included is a guideline only. The salary offered may vary based on factors, including, but not limited to, the successful candidate’s relevant knowledge, skills, and experience.

The recruiting efforts for this role are intended to fill a vacant position.

In the market for…

Excitement - Explore emerging technology and innovation, as well as ventures and digital finance that shape the future of global markets! Experience the movement of the market while grounded in the stability of close to 200 years of success.

Connection - With site hubs in some of the world’s most multicultural cities, we leverage our size and structure to create rich connections and belonging while experiencing powerful global impact through our work.

Impact - More than a platform, we use our talents to power mission-critical systems that drive global economic advancement, innovation, and growth. As well, our employee-led spreads social good via our giving strategy.

Wellness - From empathetic leadership to a culture of flexibility and balance, we believe wellness at work creates the maximum yield and a stronger “we”. Plus, with a cloud-first and hybrid workstyle, as well as generous time-off and leaves, we support a life well lived!

Growth - From a growth mindset in our work, to expansion in our business, TMX is home to action-takers energized by the achievement of ambitious growth.

Ready to enrich your career with impactful work, leaders who truly care, and the flexibility and programs to help you thrive as part of #TeamTMX ? Apply now.

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