Job Title: Software Developer – Senior
Location: Toronto, ON
Experience: 3–9 Years
Job Type: Contract
We are seeking an experienced Senior Software Developer to design, develop, integrate, and maintain complex software applications and data-driven solutions. The candidate will be responsible for implementing application features, developing APIs, building ETL pipelines, integrating front-end and back-end components, and optimizing database performance. The ideal candidate will demonstrate strong programming skills, sound architectural understanding, and the ability to deliver scalable, secure, and maintainable applications.
Design, develop, enhance, and maintain enterprise and internet-ready applications.
Develop, consume, test, and integrate RESTful APIs and other application interfaces.
Implement front-end components and integrate them with back-end services, business logic, and databases.
Design, build, and maintain ETL workflows and data pipelines to support data extraction, transformation, validation, and loading.
Develop application modules using object-oriented programming principles and relevant 3GL languages.
Write complex SQL queries, optimize database operations, and troubleshoot data-related issues.
Design and maintain relational database structures and support applications that interact with hierarchical databases.
Apply rapid application development (RAD) approaches to accelerate prototyping, iterative delivery, and application enhancements.
Identify and resolve performance bottlenecks across application, API, integration, and database layers.
Implement application validation, error handling, logging, security controls, and data integrity measures.
Conduct code reviews, unit testing, integration testing, and defect resolution.
Collaborate with business analysts, architects, QA engineers, DevOps teams, and other stakeholders to translate requirements into technical solutions.
Prepare technical specifications, integration documentation, and implementation guidelines.
Mentor junior developers and contribute to coding standards and development best practices.
3–9 years of professional software development experience.
Strong experience in application development, programming, and software integration.
Hands-on experience designing and integrating APIs and web services.
Proficiency in front-end development and front-end/back-end integration.
Experience developing and maintaining ETL processes or data pipelines.
Strong knowledge of object-oriented programming and one or more 3GL languages, such as Java, C#, C++, or Python.
Proficiency in SQL and experience working with relational databases; exposure to hierarchical databases is desirable.
Experience developing and supporting internet-ready, data-driven applications.
Knowledge of RAD methodologies, iterative development, and agile practices.
Ability to troubleshoot complex application issues and optimize code and database performance.
Familiarity with source control, automated testing, deployment practices, and technical documentation.
Strong analytical, communication, and cross-functional collaboration skills.
Experience with API security, authentication, and integration patterns.
Exposure to cloud-based application development, CI/CD, and application monitoring.
Experience with ETL orchestration tools, data validation frameworks, or enterprise integration platforms.