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Front End Developer

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Toronto, Ontario, Canada World Wide Technology Full time $60,000 - $180,000 per year

World Wide Technology is looking for a Front-End Developer. This role is part of WWT's Strategic Resourcing services and is a contract role. The candidate will be supporting a WWT customer and will be employed by one of WWT's preferred partners. The partner will provide full compensation and benefit information prior to employment with the partner.

Why WWT?

At Worldwide Technology, we work together to make a new world happen. Our important work benefits our clients and partners as much as it does our people and communities across the globe. WWT is dedicated to achieving its mission of creating a profitable growth company that is also a Great Place to Work for All. We achieve this through our world-class culture, generous benefits, and by delivering cutting-edge technology solutions for our clients.

WWT was founded in 1990 in St. Louis, Missouri. We employ more than 10,000 people globally and close nearly $20 billion in revenue in 2023. We have an inclusive culture and believe our core values are the key to company and employee success. WWT is proud to have been included on the FORTUNE "100 Best Places to Work For" list 12 years in a row

Want to work with highly motivated individuals on high-performance teams? Join WWT today

Job Title: Front End Developer

Location: Toronto, CA

Duration: 6+ month contract to Hire

Summary:

We are seeking a skilled JavaScript Developer with a solid understanding of HTTP request/response flow, client-server communication, and web architecture. The ideal candidate will have experience building scalable front-end and/or back-end applications using modern JavaScript frameworks, and be capable of diagnosing, optimizing, and implementing performance network interactions.

Responsibilities:

  • Design, develop, and maintain web applications using JavaScript , React, or similar frameworks).
  • Build and optimize features with a deep understanding of HTTP methods, headers, status codes, and request lifecycle.
  • Collaborate with backend teams to define RESTful APIs or GraphQL schemas and ensure efficient client-server communication.
  • Analyze and troubleshoot HTTP-related issues such as latency, failed requests, caching problems, and CORS errors.
  • Implement secure and efficient data transmission using proper HTTP practices, including authentication (OAuth, JWT), compression, and caching headers.
  • Work closely with DevOps or infrastructure teams to monitor and improve API performance and reliability.
  • Write clean, maintainable code and participate in code reviews.

Qualifications & Experience

  • Strong proficiency in JavaScript (ES6+).
  • Solid understanding of the HTTP protocol, including:
  • Request/response lifecycle
  • Methods (GET, POST, PUT, DELETE, etc.)
  • Status codes and headers
  • Connection handling (keep-alive, pipelining)
  • Cookies, sessions, and authentication flows
  • Experience with front-end frameworks (e.g., React, , or Angular) and/or back-end ).
  • Experience working with REST APIs, GraphQL, or WebSockets.
  • Familiarity with tools like Postman, curl, or browser DevTools for analyzing HTTP traffic.
  • Understanding of browser and server caching mechanisms, CDNs, and content negotiation.
  • Familiarity with cross-origin communication (CORS) and security best practices related to HTTP.
  • Strong problem-solving skills and attention to detail.

Nice to Have:

  • Experience with API gateways, load balancers, and reverse proxies (e.g., NGINX).
  • Exposure to cloud environments (AWS, GCP, Azure).
  • Understanding of TCP/IP, TLS/SSL, and DNS in context of web communication.
  • Familiarity with performance profiling tools and APMs (New Relic, Datadog, etc.).

If you have any questions or concerns about this posting, please email

Job Type: Fixed term contract

Contract length: 6 months

Pay: $28.75-$81.79 per hour

Expected hours: 40 per week

Work Location: In person