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Senior Backend Developer Jobs in Whitby, ON (NOW HIRING)

Rumble

Senior Back-End Developer

Toronto, ON · On-site

CA$135K - CA$154K/yr

Rumble is seeking a Senior Back-End Developer to design, build, and maintain high-performance server-side systems that power a large-scale video platform serving millions of users. This is a senior ...

ShyftLabs

Senior Backend Developer

Toronto, ON · Hybrid

CA$100K - CA$140K/yr

  • Medical

  • Dental

  • Vision

The Opportunity ShyftLabs is looking for a Senior Developer to help design, build, and scale our ... The ideal candidate combines strong backend and frontend engineering skills with experience in ...

Rumble

Senior Back-End Developer, Rumble Studio

Toronto, ON · On-site

CA$155K - CA$195K/yr

Rumble Studio is seeking a Senior Back-End Engineer to design, build, and operate the backend systems that power our real-time, multiuser video production application. This is a senior individual ...

Worthland

Senior Backend Engineer (Web3)

Toronto, ON

CA$300K - CA$450K/yr

Role Overview We are seeking a Senior Backend Engineer (Web3) with strong expertise in Go and ... Collaborative, developer-focused work environment in a downtown office . * Inclusive and dynamic ...

Worthland

Senior Backend Engineer (Web3)

Toronto, ON

CA$300K - CA$450K/yr

Role Overview We are seeking a Senior Backend Engineer (Web3) with strong expertise in Go and ... Collaborative, developer-focused work environment in a downtown office . * Inclusive and dynamic ...

NearSource

Senior JAVA Backend Developer

Toronto, ON · Remote

CA$80 - CA$90/hr

Senior Java Backend Developer Location: 100% Remote, Canada Experience: 7 to 10 Years Employment Type: T4 Contract Rate: CAD $80 to $90 per Hour Role Summary NearSource is seeking a Senior Java ...

Tucows Inc.

Senior Backend Engineer

Toronto, ON · Remote

CA$145K - CA$155K/yr

As a Senior Backend Software Engineer, you will design, build, and maintain the services, databases, and APIs that support our products. This is a hands-on individual contributor role that also ...

Tucows Domains

Senior Backend Engineer

Toronto, ON · Remote

CA$145K - CA$155K/yr

As a Senior Backend Software Engineer, you will design, build, and maintain the services, databases, and APIs that support our products. This is a hands-on individual contributor role that also ...

NimbleRx

Senior Backend Engineer

Toronto, ON · On-site

  • Medical

  • Dental

  • Vision

  • PTO

As a Senior Backend Engineer , you will have a hand in architecting the technology and customer experience that are pivotal to multiple web products for patients, pharmacies and other customers of ...

EvenUp

Backend Engineer, Growth & Agents

Toronto, ON · Remote

CA$160K - CA$215K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

As one of the senior backend engineers on the team, you'll own technical decisions end-to-end, from shaping ambiguous product ideas through production. You'll partner closely with Product and Design ...

US Mobile

Senior Backend Engineer

Toronto, ON · On-site

CA$140K - CA$180K/yr

  • Medical

  • PTO

Collaborate with Product, QA, and DevOps teams to deliver reliable and scalable features * Write ... backend development, including code generation, debugging, and optimization of APIs and services.

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Senior Backend Developer information

What does a senior backend developer do?

A Senior Backend Developer is responsible for designing, building, and maintaining the server-side logic of web applications. They work with databases, APIs, and server infrastructure to ensure that applications run smoothly, securely, and efficiently. In addition to writing robust code, they often mentor junior developers, contribute to architectural decisions, and collaborate with frontend teams to deliver seamless user experiences. Their expertise is crucial for scaling applications and implementing best practices in software development.

What is the difference between Senior Backend Developer vs Backend Developer?

AspectSenior Backend DeveloperBackend Developer
Required Experience5+ years, leadership skills1-3 years, foundational skills
ResponsibilitiesDesign architecture, mentor juniors, optimize systemsImplement features, fix bugs, write code
Skills & CertificationsAdvanced coding, system design, relevant certificationsBasic coding, database knowledge
Work EnvironmentCollaborates with cross-functional teams, often in larger projectsFocuses on individual tasks within projects

The main difference between a Senior Backend Developer and a Backend Developer lies in experience, responsibilities, and leadership. Senior Backend Developers typically have more years of experience, take on complex system design, and mentor junior staff, whereas Backend Developers focus on implementing features and fixing bugs. Both roles are essential in backend development teams, but the senior role involves more strategic and leadership duties.

What are the key skills and qualifications needed to thrive as a senior backend developer, and why are they important?

To thrive as a Senior Backend Developer, you need advanced proficiency in server-side programming languages (such as Java, Python, or Node.js), deep understanding of API design, and experience with database management, often supported by a degree in computer science or related field. Familiarity with version control systems (like Git), cloud platforms (such as AWS or Azure), and relevant certifications in backend technologies are commonly required. Strong problem-solving abilities, effective communication, and leadership skills help you collaborate with cross-functional teams and mentor junior developers. These competencies ensure robust, scalable backend systems and drive successful project delivery in complex technical environments.

What are common challenges senior backend developers face when leading complex projects, and how can they address them?

Senior Backend Developers often encounter challenges such as integrating legacy systems with new technologies, ensuring scalability under increased load, and coordinating cross-functional teams for seamless feature delivery. Addressing these challenges typically involves proactive architectural planning, clear communication with frontend and DevOps teams, and adopting best practices like code reviews and automated testing. Staying updated on emerging technologies and fostering a culture of knowledge sharing within the team also help in overcoming technical obstacles and driving successful project outcomes.

What cities near Whitby, ON are hiring for Senior Backend Developer jobs?

Cities near Whitby, ON with the most Senior Backend Developer job openings:

Senior Backend Developer jobs near you
Infographic showing various Senior Backend Developer job openings in Whitby, ON as of August 2026, with employment types broken down into 79% Full Time, 3% Part Time, and 18% Contract. Highlights an 80% Physical, 6% Hybrid, and 14% Remote job distribution.

Senior Back-End Developer

Rumble - Career Page

Toronto, ON

CA$135K - CA$154K/yr

Full-time

Re-posted 27 days ago

Job description

Rumble is seeking a Senior Back-End Developer to design, build, and maintain high-performance server-side systems that power a large-scale video platform serving millions of users. This is a senior individual contributor role for someone who can own backend systems end to end, improve them in production, and make strong technical decisions as scale, complexity, and performance demands grow.

Our environment centers on backend services, data-intensive application logic, and production systems that must perform reliably at high scale. You should be comfortable working across PHP, MySQL, caching layers, APIs, Linux environments, and legacy systems, while also partnering effectively with front-end engineers to connect user-facing components to server-side logic.

You'll work closely with engineering partners to turn requirements into clear technical plans, apply strong systems design fundamentals to complex backend problems, and make sound implementation decisions across application, data, and infrastructure layers.

Responsibilities

Design and evolve scalable backend systems for a high-traffic video platform, with a focus on performance, maintainability, and long-term reliability. This includes building APIs, optimizing MySQL schemas and queries, implementing effective caching strategies with Memcached and Redis, and supporting background jobs or data-processing workloads that operate at significant scale.

The role also includes maintaining and modernizing legacy code, integrating front-end components with backend logic, and contributing to technical direction through code reviews, reusable patterns, and sound architectural judgment.

Qualifications
  • 8+ years of experience in back-end development, including strong experience building production systems at scale.
  • 10+ years of experience with object-oriented programming languages, including 5+ years working with PHP and modern PHP practices such as PHP 8+.
  • Strong experience with MySQL, including schema design, indexing, and query optimization, along with hands-on experience using caching systems such as Memcached and Redis.
  • In-depth understanding of web development fundamentals, HTTP protocols, and Linux server environments, including reading logs and troubleshooting production issues.
  • Working knowledge of front-end technologies such as JavaScript or TypeScript, HTML, and CSS, along with the willingness to jump into any project when needed.
Preferred Qualifications
  • Experience with video technologies, containers, codecs, or live streaming environments.
  • Experience with NGINX, WebSocket-based communication, BASH scripting, networking fundamentals, or static analysis tools such as PHPStan.
  • Degree in Computer Science, Engineering, or a related field.
  • Experience modernizing legacy PHP applications, working with server-side rendering architectures, or contributing to CI/CD and automated testing practices such as PHPUnit.

Note: The salary range listed for this position is a good faith estimate based on experience, qualifications, and internal compensation structure. The actual salary offered varies depending on the candidate's skill level and experience. This posting refers to an active vacancy within the organization.

Annual Compensation Range: 

$135,000 - $154,000 CAD base + benefits + equity 

Note: The salary range listed for this position is a good faith estimate based on experience, qualifications, and internal compensation structure. The actual salary offered varies depending on the candidate's skill level and experience. This posting refers to an active vacancy within the organization.

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