Staff Engineer

The TJX Companies, Inc.•Mississauga, ON

29d•Onsite

About The Position

At TJX Companies, every day brings new opportunities for growth, exploration, and achievement. You’ll be part of our vibrant team that embraces diversity, fosters collaboration, and prioritizes your development. Whether you’re working in our four global Home Offices, Distribution Centers or Retail Stores—TJ Maxx, Marshalls, Homegoods, Homesense, Sierra, Winners, and TK Maxx, you’ll find abundant opportunities to learn, thrive, and make an impact. Come join our TJX family—a Fortune 100 company and the world’s leading off-price retailer. Job Description: Staff Engineer - Merchandising What you’ll discover We offer an inclusive culture and growth opportunities! Global IT Organization which collaborates across U.S., Canada, Europe, and Australia; click here to learn more! Challenging, collaborative, and team-based environment. What you’ll do The Merchandising Solution Delivery organization manages the Merchandise Inventory and Markdown software and systems that track where millions of products will move around the globe to our stores each day. Our team thrives on strong relationships with our business partners and is working diligently to address their needs which support TJX growth and operational stability. On this tightly knit and fast-paced solution delivery team you will be constantly challenged to stretch and think outside the box. We are seeking a motivated, talented, experienced Staff Engineer who has deep Microsoft .NET Development knowledge and experience to design and implement business functionality in their assigned Platforms / Products using and creating DevSecOps best practices. We want people that can support and lead the technical strategy in their product team and communicate effectively with technical and non-technical associates. TJX is the leading off-price apparel and home fashions retailer in the U.S. and worldwide, with four global home offices, seven brands, and nearly 4,700 stores in nine countries, and five distinctive branded e-commerce sites. As Associates, we make a difference with our contributions - collaborating in delighting shoppers with hidden treasures. At TJX, honesty, integrity, and treating each other with dignity and respect matter. We offer great opportunities, an incredible culture, and a sense of excitement for the future. Every day is a new adventure, a fresh chance to experience retail. We're not afraid to stand out. Stand apart. Stand for something.

Requirements

10+ years of hands‑on software development experience focused on the Microsoft .NET ecosystem (C#, .NET Framework, .NET Core).
Extensive experience designing, developing, and optimizing SQL Server databases, including complex queries, stored procedures, indexing strategies, and performance tuning.
Ability to work with mainframe SMEs to reverse-engineer logic and map it into modern .NET domain models.
Ability to read, analyze and interpret Mainframe code such as COBOL, JCL, VSAM and DB for z/OS schemas.
Experience extracting and transforming data from Mainframe DB2 and IMS.
Hands-on experience designing and building data extraction pipelines from mainframe systems into modern platforms (SQL, cloud storage, APIs, microservices).
Experience working on large-scale data migration or system modernization projects.
Proven track record delivering high‑quality, scalable, secure, and maintainable applications across medium to large projects.
Strong understanding of application architecture principles, API design, and modern development practices such as dependency injection, CI/CD, unit testing, and code quality standards.
Experience collaborating closely with Product, Platform, Infrastructure, and Security teams to design and implement end‑to-end technical solutions.
Ability to lead technical discussions, provide architectural input, and solve complex, highly visible business problems.
Demonstrated experience mentoring junior developers and contributing to engineering best practices, standards, and development processes.

Nice To Haves

Experience with cloud platforms (Azure preferred), including App Services, Functions, Key Vault, APIM, and cloud‑native design patterns.
Familiarity with modern frontend technologies (e.g., Angular, or Blazor)
Experience with Entity Framework, LINQ, microservices architectures
Extensive experience with SQL Server Integration Services (SSIS), including designing, optimizing, and supporting complex ETL processes, data workflows, and integration of pipelines.
Experience with tools such as Git, Azure DevOps, SonarQube, or similar development and DevSecOps tools.
Experience with performance profiling, debugging, and monitoring .NET and SQL Server applications in production environments.
Knowledge of the automation tools (e.g. REXX, Python) is preferable.
Experience mentoring engineers of varying levels, elevating engineering maturity, shaping development processes, and championing best‑in-class development practices (CI/CD, testing strategies, code quality).

Responsibilities

Experience of authoring functional/technical designs documents including performance, security and availability considerations
Proven experience of developing new features and services that are medium to high level of complexity working with the Product, Platform, Infrastructure and Security teams
Proven ability to design, code, test, deploy & support working software/technology components, working collaboratively with architects and other engineers
Experience in delivering clean, secure, performant code / technology components that meets all non-functional requirements
Experience in leading discussions on design approaches to solving highly visible, strategic and complex business problems
Experience in establishing development process definitions, best practices and standards
Experience identifying emerging technologies for consideration for new technology direction and implementing proof of concepts to prove the new technology
Proven ability to create Threat Model, Architecture, Estimates, Design, Code, and deliver for the required business feature
Experience of acting in a Lead Engineer capacity for medium to large initiatives, prioritizing and assigning tasks, providing guidance and resolving issues
Proven ability to mentor more junior engineers across the technical domains/enterprise