oakville, on senior software developer (c# .net / sql server) Jobs – 33 Openings This Week

Market Data Sr Developer - Python and .Net - Assistant Vice President
Citi —Mississauga, ON
- $94,300–$141,500 a year
- Full-time
- Hybrid work
- Azure
- Oracle
- Computer Science
Senior Web Application Developer
Flynn Group of Companies —Mississauga, ON
- $120,000–$150,000 a year
- Full-time
- Azure
- Computer Science
- DevOps
- Relocation assistance
- Dental care
Quick apply
11d
Senior Software Engineer
Canada —Mississauga, ON
- $88,270 a year
- Full-time
- Azure
- Computer Science
- Engineering
Quick apply
Senior Java Developer – Vice President
Citi —Mississauga, ON
- $120,800–$170,800 a year
- Full-time
- Hybrid work
- Oracle
- Java
- Bachelor's
Sr Eng - Sr MTS - Full Stack Software Development
MacDonald Dettwiler and Associates Inc. —Brampton, ON
- $110,000–$140,000 a year
- Hybrid work
- Computer science
- Computer Science
- Engineering
- Disability insurance
- Dental care
Sr Eng - Sr MTS - Full Stack Software Development
MDA —Brampton, ON
- $110,000–$140,000 a year
- Full-time
- Computer science
- Computer Science
- Engineering
- Disability insurance
- Dental care
Sr. Java Developer
Exaways corporation —Mississauga, ON
- $110,000–$120,000 a year
- Full-time
- Hybrid work
- Oracle
- Computer Science
- DevOps
Quick apply
12d
Senior Full Stack Engineer
Royal Bank of Canada —Mississauga, ON
- Full-time
- Azure
- DevOps
- AWS

More jobs to discover

Find similar jobs that you might be interested in.

Senior Full-Stack Developer
Method Integration Inc. —Toronto, ON
Provide feedback in Grooming sessions on best practices for design and story implementation. Training – You will receive initial and ongoing training on…
$100,000–$135,000 a year
Software Developer - Senior - Maximo
Bevertec —Toronto, ON
Extensive experience on Maximo application configuration & development. Exposure to Maximo implementation, upgrades, testing, and support activities.
$90–$95 an hour
Quick apply
13d

Show more similar jobs

Explore jobs in cities nearby

Check out jobs in cities near your current location, Columbus

Senior System Analyst - Application and Integration (Developer)
Mackenzie Health —Richmond Hill, ON
Conduct user workshops and collaborate with internal teams, external vendors, and clinical/business stakeholders across all phases of the system lifecycle—…
$50.54–$59.44 an hour
Lead/Senior Software Engineer – Cryptographic Systems
Procom —Richmond Hill, ON
The engineer will be heavily involved in both development and design review processes. Lead feature design end-to-end, from requirements through API design and…
$60–$80 an hour
Quick apply

Show more jobs in cities nearby

I want to receive the latest job alerts for senior software developer (c# .net / sql server) in oakville, on

By signing in to your account, you agree to SimplyHired's Terms of Service and consent to our Cookie and Privacy Policy.

Explore jobs in more locations

senior software developer (c# .net / sql server) jobs near oakville, on

Senior Web Developer jobs in Mississauga, ON

Senior Software Engineer jobs in Mississauga, ON

Assistant Vice President jobs in Mississauga, ON

Senior Java Developer jobs in Mississauga, ON

Full Stack Developer jobs in Mississauga, ON

Full Stack Developer jobs in Brampton, ON

Senior Web Developer jobs in Calgary, Ab

Senior Web Developer jobs in Spruce Grove, Ab

Senior Accountant jobs in Mississauga, On

Senior Web Developer jobs in Toronto, On

Senior Web Developer jobs in Vancouver, Bc

Junior Developer jobs in Montréal, Qc

Senior Software Engineer jobs in Langley, Bc

Senior Software Engineer jobs in New Brunswick

Software jobs in Thunder Bay, On

Senior Consultant jobs in Toronto, On

Senior Software Engineer jobs in Victoria, Bc

Senior Operations Manager jobs in Toronto, On

Senior Software Engineer jobs in Windsor, On

Software Developer jobs in Hamilton, On

Market Data Sr Developer - Python and .Net - Assistant Vice President

Citi -
Mississauga, ON

Apply Now

Job details

Full-time
$94,300–$141,500 a year

Qualifications

Spring Boot
CI/CD
Performance tuning
Azure
Oracle
Computer Science
CSS
Cassandra
React
Kubernetes
Relational databases
DevOps
Engineering
.NET Core
C#
Test automation
Microsoft SQL Server
NoSQL
Git
Test-driven development
Google Cloud Platform
MongoDB
.NET
Java
Master's degree
Databases
Microservices
SQL
AWS
Analysis skills
Docker
Bachelor's
JavaScript
PostgreSQL
Version control systems
Redis
RabbitMQ
REST
Angular
Software development
APIs
Financial services
Kafka
Multithreading
Jenkins
TypeScript
Communication skills
Python
HTML

Full job description

Job Req Id:

26954435

Location(s):

Mississauga, Ontario, Canada

Job Type:

Hybrid

Posted:

Apr. 28, 2026

Discover your future at Citi

Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact.

Job Overview

The Fixed Income Technology team is a dynamic and fast-paced group responsible for developing and maintaining the trading, pricing, and risk management systems that support the firm's global Fixed Income business. We work directly with traders, quantitative analysts, and risk managers to deliver innovative solutions that provide a competitive edge in the market. Our mission is to build robust, scalable, and high-performance applications that are critical to the success of the business.

We are seeking a talented and highly motivated Senior Full Stack Developer to join our team. In this role, you will be responsible for the end-to-end design, development, and deployment of sophisticated applications for the Fixed Income trading desk. The ideal candidate is a passionate technologist with a strong command of both front-end and back-end development, comfortable working with complex financial data and demanding real-time requirements. You will play a key role in building the next generation of our marketdata platform, from the user interface down to the database.

Key Responsibilities

Application Development: Design, build, test, and deploy high-quality, scalable, and robust full-stack applications for Fixed Income trading, and risk management.

Front-End Development: Create intuitive, responsive, and high-performance user interfaces using modern web technologies (e.g., React, Angular) to visualize marketdata and workflows.

Back-End Development: Develop resilient server-side logic, microservices, and APIs to handle trade processing, data management, and integration with various internal and external systems.

Collaboration: Work closely with traders, quants, and business analysts to gather requirements, understand complex financial workflows, and translate them into technical solutions.

System Design: Participate in architectural design discussions and contribute to the overall vision and strategy for the technology platform.

Code Quality: Write clean, maintainable, and well-documented code. Participate in code reviews to ensure high standards of quality and consistency.

Database Management: Design and manage database schemas and write efficient queries for both SQL and NoSQL databases.

Production Support: Provide timely support for production applications, troubleshoot issues, and ensure system stability and performance.

Agile Practices: Actively participate in an Agile development environment, including sprint planning, daily stand-ups, and retrospectives.

Required Skills and Qualifications

Education: Bachelor’s or Master’s degree in Computer Science, Engineering, or a related technical field.

Experience: 8+ years of professional experience in software development, with a proven track record as a Full Stack Developer.

Front-End:

Strong proficiency in JavaScript/TypeScript, HTML5, and CSS3.

Hands-on experience with at least one modern front-end framework (e.g., React, Angular).

Back-End:

Strong proficiency in a server-side language C# (.NET Core) and Python (Intermediate knowledge) is required.

Having coding experience in Java (Spring Boot) is a bonus.

Experience designing and building RESTful APIs and microservices.

Databases:

Solid experience with relational databases (PostgreSQL, SQL Server, Oracle) including schema design and query optimization.

Experience with NoSQL databases (MongoDB, Redis, Cassandra).

DevOps:

Proficiency with version control systems, primarily Git.

Experience with CI/CD pipelines and tools (Jenkins, Tekton, Harness).

Familiarity with containerization technologies like Docker and orchestration with Kubernetes.

Soft Skills:

Excellent problem-solving and analytical skills.

Strong communication and interpersonal skills, with the ability to work effectively with both technical and non-technical stakeholders.

Ability to work under pressure in a fast-paced environment.

Preferred Qualifications

Domain Knowledge: Prior experience in Financial Services, particularly within Fixed Income (Bonds, Swaps, Futures, Options) or other capital markets domains.

Cloud Computing: Experience with developing and deploying applications on a major cloud platform (AWS, Azure, GCP).

Messaging Systems: Experience with real-time messaging technologies like Kafka, RabbitMQ, or Solace.

Performance Tuning: Experience with low-latency programming, multithreading, and performance optimization.

Testing: Strong believer in automated testing with experience in TDD/BDD practices.

Job Family Group:

Technology

Job Family:

Applications Development

Time Type:

Full time

Primary Location Full Time Salary Range:

$94,300.00 - $141,500.00

Most Relevant Skills

Please see the requirements listed above.

Other Relevant Skills

For complementary skills, please see above and/or contact the recruiter.

Automated Processing and AI

We use automated processing, including artificial intelligence, for our legitimate business interests (or our reasonable and appropriate business purposes) to identify and align the candidate's skills and abilities with a specific job opening. Additionally, if you so choose, or consent, we can match your skills and abilities to other suitable roles at Citi.

Importantly, all our hiring processes and decisions, including determining your suitability for a role, are conducted, checked, and decided by individuals. Our automated processing and AI do not involve relying on automatic or autonomous decision-making. Please refer to any Jurisdictional Considerations, with specific provisions for your country (where relevant) for further details.

This job opening is for an existing job vacancy.

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 opportunity review Accessibility at Citi.

View Citi’s EEO Policy Statement and the Know Your Rights poster.

Apply Now

Refine Your Search

senior software developer (c# .net / sql server) jobs in oakville, on

Market Data Sr Developer - Python and .Net - Assistant Vice President

Senior Web Application Developer

Senior Software Engineer

Senior Java Developer – Vice President

Sr Eng - Sr MTS - Full Stack Software Development

Sr Eng - Sr MTS - Full Stack Software Development

Sr. Java Developer

Senior Full Stack Engineer