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Api Developer Jobs in Toronto, ON (NOW HIRING)

Flexstaf IT

Senior Web Developer

Toronto, ON · On-site

Application & API Development: Design, build, and maintain Web API services, REST Services, SOAP ... Backend Data Engineering: Write complex SQL queries, stored procedures, user-defined functions ...

Private AI

Junior Developer

Toronto, ON · On-site

Building and maintaining API endpoints and the business logic behind them * Contributing to ... Working with senior engineers on authorization design and other architectural decisions

Scotiabank

Software Engineer

Toronto, ON · On-site

The Role We are seeking an experienced Senior API Developer to join the AML Technology team, supporting critical AML applications. This role offers an opportunity to take on development, drive ...

Autodesk

Senior Software Developer

Toronto, ON

API design, data model changes, implementation, automated tests, CI/CD, documentation, runbooks ... Mentor other developers, participate in design and code reviews, and help evolve engineering ...

Fintros

React Developer

Toronto, ON · On-site +1

Our engineering stack is pretty world-class ... We have a well-documented micro-architecture service written in either Python (Flask) or Rails API ...

Cisco

Software Developer

Toronto, ON · On-site

Your Impact As a Software Developer, you will design, develop, test, and support backend ... Hands-on experience with MuleSoft application development, including API design, implementation ...

Autodesk

Senior AI Developer

Toronto, ON · On-site

You will work with product managers, developers and operations to design, implement and maintain ... Excellent knowledge of REST API standards, Graph and web services * Experience taking requirements ...

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Showing results 21-40

All JobsApi Developer JobsApi Developer Jobs in Toronto, ON

Api Developer information

See Toronto, ON salary details

$53K

$110.7K

$168.4K

How much do api developer jobs pay per year?

As of Sep 3, 2026, the average yearly pay for api developer in Toronto, ON is $110,679.00, according to ZipRecruiter salary data. Most workers in this role earn between $89,707.00 and $125,495.00 per year, depending on experience, location, and employer.

What does an API developer do?

An API Developer is responsible for designing, building, and maintaining application programming interfaces (APIs) that enable software applications to communicate with each other. They ensure APIs are secure, scalable, and efficient, often working with technologies like REST, GraphQL, and SOAP. API Developers collaborate with front-end and back-end teams to integrate systems and improve functionality. Their role also involves debugging, optimizing performance, and documenting API usage.

What are the key skills and qualifications needed to thrive as an API developer?

To thrive as an API Developer, you need strong programming skills in languages like JavaScript, Python, or Java, as well as a solid understanding of RESTful and SOAP API protocols. Proficiency with tools such as Postman, Swagger, and familiarity with API security, cloud platforms, and relevant certifications (like AWS Certified Developer) are commonly required. Excellent problem-solving abilities, attention to detail, and clear communication skills help you collaborate effectively and navigate complex development challenges. These capabilities are crucial for building reliable, scalable APIs that enable seamless integration between diverse systems and deliver value to users and teams.

What does a typical workday look like for an API developer?

A typical workday for an API Developer involves designing, coding, and testing APIs to ensure they meet business requirements and function optimally. You’ll frequently troubleshoot integration issues, review code for security and performance, and collaborate closely with front-end, back-end, and product teams to address evolving project needs. Daily tasks may include updating API documentation, participating in agile sprint meetings, and responding to technical support queries from other developers or partners. The work environment is often dynamic and collaborative, with a strong emphasis on continuous learning and adapting to new technologies.

Are API developers in demand?

API developers are in high demand due to the increasing reliance on web services and integrations across industries. Skills in REST, SOAP, and cloud platforms like AWS or Azure enhance job prospects, and demand is expected to grow as digital transformation accelerates.

How much does an API developer make?

An API developer's salary varies based on experience, location, and skills, but typically ranges from $70,000 to $130,000 annually. Senior developers with expertise in RESTful APIs, security, and cloud platforms can earn higher salaries, especially in competitive markets.

Is an API developer a good career?

An API developer is a valuable role in software development, focusing on designing and maintaining application programming interfaces that enable different software systems to communicate. The role often requires knowledge of programming languages, API protocols, and tools like REST or GraphQL, and offers opportunities for growth in technology companies and development teams. It can be a stable and well-paying career path with demand driven by digital integration needs.

What are the most commonly searched types of Api Developer jobs in Toronto, ON?

The most popular types of Api Developer jobs in Toronto, ON are:

What are popular job titles related to Api Developer jobs in Toronto, ON?

For Api Developer jobs in Toronto, ON, the most frequently searched job titles are:

What job categories do people searching Api Developer jobs in Toronto, ON look for?

The top searched job categories for Api Developer jobs in Toronto, ON are:

Api Developer jobs near you
Infographic showing various Api Developer job openings in Toronto, ON as of August 2026, with employment types broken down into 86% Full Time, 4% Part Time, and 10% Contract. Highlights an 80% Physical, 7% Hybrid, and 13% Remote job distribution, with an average salary of $110,679 per year, or $53.2 per hour.

Senior Web Developer

Flexstaf IT

Toronto, ON • On-site

Full-time

Posted 7 days ago

Job description

We are seeking an experienced Web Services & Application Developer with strong C#, ASP.NET, and SQL Server capabilities to maintain, modernize, and enhance legacy web applications, REST services, and SOAP web services. In this role, you will bridge the gap between web application maintenance and backend service integration, ensuring system stability, building secure APIs, and optimizing complex database workflows.

Key Responsibilities
  • Application & API Development: Design, build, and maintain Web API services, REST Services, SOAP web services, and existing ASP.NET applications using C#, .NET Framework, HTML5, CSS3, JavaScript, and AJAX.
  • Service Integration & Modernization: Develop and consume RESTful APIs and SOAP/WCF web services to enable seamless integration across enterprise platforms and legacy architectures.
  • Backend Data Engineering: Write complex SQL queries, stored procedures, user-defined functions, triggers, and views in T-SQL, optimizing database performance and data exchange workflows.
  • Legacy Refactoring & Security: Identify performance bottlenecks in web applications and web services; refactor and optimize C# code and database scripts for performance, scalability, and security (e.g., OWASP compliance, SQL injection prevention).
  • System Support & Integration: Support system integration testing, debug web service communication, resolve production issues, and document technical architecture and API endpoints.
Required Qualifications
  • Experience: 5+ years of professional software development experience with C#, ASP.NET, Web Services, and Microsoft SQL Server.
  • Core Tech Stack: Deep proficiency in C#, ASP.NET, REST Services (Web API), and SOAP Services (WCF / ASMX), alongside front-end fundamentals (JavaScript, jQuery, HTML5, CSS3).
  • Web Services & API Design: Strong hands-on experience designing, consuming, and securing RESTful JSON endpoints and XML-based SOAP contracts (WSDL, XSD, SOAP envelopes).
  • T-SQL Mastery: Advanced skills in writing and optimizing complex T-SQL queries, stored procedures, execution plans, and database indexing to support service payloads.
  • Version Control: Experience with Git, Azure DevOps, or Team Foundation Server (TFS).
Preferred Qualifications
  • Experience migrating legacy ASP.NET applications and SOAP services to modern frameworks (ASP.NET Core, RESTful microservices, Angular, or React).
  • Deep understanding of IIS server configuration, SSL/TLS certificates, and API security authentication models (OAuth 2.0, JWT, API Keys, Basic Auth).
  • Knowledge of cloud platforms (Azure Web Apps, Azure API Management, Azure SQL) or C# unit testing frameworks (xUnit, NUnit, Moq)