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Contract Back End Developer Jobs in Ontario (NOW HIRING)

Prophix

Senior Back End Engineer Java/OLAP

Etobicoke, ON · On-site

As a Senior Back-End Engineer specializing in Java and OLAP, you will own the Java side of that ... NET consumer aligned as cube contracts evolve. * Investigate and resolve OLAP-specific defects ...

Posted today

Crowdlinker

... on a remote, contract, hourly basis). E ST candidates or ability to work EST hours preferred ... Proficient knowledge of backend programming languages like Node.js * Proficient in using front-end ...

Royal Bank of Canada

Staff AI Engineer

Toronto, ON · On-site

... contracts, backend, AI logic, and the executive-facing interface, with no expectation of a ... Programming Languages, Software Development, Software Development Life Cycle (SDLC), System ...

StackandCo

\n \n \n \n \n We have a requirement for a C# Developer to join our client in Dublin City Centre on a 6\-month contract with the possibility of extension. \n \n \n \n \n \n The role is Back\-End and ...

StackandCo

... a 3\-6 month contract. \n \n \n \n \n \n The contract will be initially 3 months with the ... Some backend (ideally .Net) is desirable but not essential \n * Strong communication skills \n \n ...

Rivalry

Engineering / Product Seniority: Senior / Staff TL/DR: We are on the hunt for a seasoned Software ... A solid history of success with Automation Testing (Unit, Contract, Integration, etc.) and Test ...

Capco

Developer with Prompt Engineering

Toronto, ON · On-site +1

... contract basis. This is an existing vacancy supporting the delivery of innovative technology ... Design, develop, and maintain scalable backend applications using Python and modern software ...

StackandCo

... rolling contract. \n \n \n \n \n \n Requirements \n \n \n * 2 years experience in PHP \n ... Minimum one year as a "PHP Developer" OR "Full Stack Developer" with PHP on the backend \n

HelloFresh

A solid understanding of backend architecture with the ability to assist in setting up new API ... contracts * Experience with monitoring and observability tools such as Honeycomb, Sentry, Datadog ...

Robinhood

Senior Android Engineer, Wallet

Toronto, ON · On-site

As a Senior Android Developer , you'll build and own new product features for the Robinhood Wallet ... You will collaborate closely with client engineers, backend developers, product designers, and ...

New

Pro Mach

Senior Software Engineer

Oakville, ON · Hybrid

Keep reading. ZPI, the developer of the industry leading Zarpac Performance Index (ZPI ... Design edge ↔ cloud contracts that align with our current backend model * Handle realworld ...

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Showing results 21-40

All JobsContract Back End Developer JobsContract Back End Developer Jobs in Ontario

Contract Back End Developer information

What is the difference between Contract Back End Developer vs Contract Front End Developer?

AspectContract Back End DeveloperContract Front End Developer
Required SkillsServer-side languages (e.g., Java, Python), databases, API developmentHTML, CSS, JavaScript, UI frameworks
Work EnvironmentBackend systems, server management, database integrationClient-side interfaces, user experience design
Common CertificationsNone specific, but backend certifications (e.g., AWS, Oracle) are commonNone specific, but front end certifications (e.g., React, Angular) are common

Contract Back End Developers focus on server-side logic, databases, and API development, while Contract Front End Developers work on user interfaces and client-side functionality. Both roles require technical skills but differ in their focus areas within software development.

What are some common challenges faced by contract back end developers when integrating with existing systems?

Contract back end developers often encounter challenges such as limited documentation, legacy codebases, and varying technology stacks when integrating with existing systems. Navigating these complexities requires strong problem-solving skills and the ability to quickly understand unfamiliar architectures. Effective communication with internal teams is crucial to clarify requirements and ensure seamless integration, especially within tight project timelines. Adaptability and proactive collaboration can help overcome these hurdles and deliver robust solutions.

How much do contract back end developers get paid?

Contract back end developers typically earn between $40 and $150 per hour, depending on experience, location, and project complexity. Senior developers with specialized skills in languages like Java, Python, or Node.js tend to command higher rates, especially for short-term or high-demand projects.

What are the key skills and qualifications needed to thrive as a contract back end developer?

To thrive as a Contract Back End Developer, you need strong skills in server-side programming languages (such as Node.js, Python, or Java), database management, and API development, often supported by a relevant degree or equivalent experience. Familiarity with version control systems like Git, cloud platforms (e.g., AWS, Azure), and containerization tools such as Docker is typically required. Excellent problem-solving, communication, and time management skills help you collaborate effectively and deliver quality work on tight schedules. These skills ensure you can build scalable, reliable back end systems that meet client requirements and project deadlines.

What is a contract back end developer?

Contract Back End Developers are software professionals who specialize in building and maintaining the server-side components of web applications on a contractual basis. They focus on databases, server logic, APIs, and integration with front-end systems to ensure smooth functionality and performance. Unlike full-time employees, contract developers are typically hired for specific projects or time frames, offering flexibility to both the developer and the employer. They often work with languages like Java, Python, Node.js, or Ruby and must be adept at collaborating with front-end teams and stakeholders.

Is a contract back end developer in demand?

Contract back end developers are in demand due to the ongoing need for software development, especially in industries adopting cloud computing and microservices architectures. Skills in programming languages like Java, Python, or Node.js, along with experience in APIs and databases, increase employability in this flexible work arrangement.
What are the most commonly searched types of Back End Developer jobs in Ontario? The most popular types of Back End Developer jobs in Ontario are:
What are popular job titles related to Contract Back End Developer jobs in Ontario? For Contract Back End Developer jobs in Ontario, the most frequently searched job titles are:
What job categories do people searching Contract Back End Developer jobs in Ontario look for? The top searched job categories for Contract Back End Developer jobs in Ontario are:
What cities in Ontario are hiring for Contract Back End Developer jobs? Cities in Ontario with the most Contract Back End Developer job openings:
Contract Back End Developer jobs near you
Infographic showing various Contract Back End Developer job openings in Ontario as of August 2026, with employment types broken down into 78% Full Time, 16% Part Time, 1% Temporary, and 5% Contract. Highlights an 91% Physical, 2% Hybrid, and 7% Remote job distribution.

Software Engineer, Backend - Unified Gateway

DoorDash Canada

Toronto, ON

Full-time

Posted 27 days ago

Job description

About the Team

Help us build the world's most reliable, on-demand logistics engine for last-mile delivery! We're bringing on experienced engineers to help us create and maintain a 24x7, no downtime, global infrastructure system that powers DoorDash's three-sided marketplace of consumers, merchants, and dashers.

About the Role

As a member of the Unified Gateway team, you'll build and maintain the API Gateway platform that sits at the front door of DoorDash's traffic - an HTTP-to-gRPC reverse proxy that accepts REST/JSON requests, translates them into Protocol Buffer messages, calls downstream gRPC services, and translates the responses back to clients. The platform empowers product engineers to declaratively define, test, deploy, and operate their API endpoints without standing up and managing their own edge services. It centrally handles authentication, authorization, request and response mapping, header propagation, encryption, and resilience, and powers experiences across DoorDash, Wolt, and Deliveroo spanning iOS, Android, and Web. By providing this robust platform, we deliver significant improvements in:

  • Velocity: Product engineers can iterate faster and deliver features more quickly.
  • Scalability: The platform is designed to handle increasing demand and traffic seamlessly.
  • Reliability: A safe programming model, centralized management, and standardized practices enhance system stability and reduce errors.
  • Cost Efficiency: Consolidating resources and streamlining processes optimizes operational costs across DoorDash.
You're excited about this opportunity because you will...
  • Design and build robust, scalable systems with engineering excellence and long-term maintainability in mind.
  • Improve performance, reliability, scalability, and security across the gateway and its request-processing pipeline.
  • Drive best practices in API management, service discovery, load balancing, and fault tolerance.
  • Champion adoption of the Unified Gateway platform across product teams.
  • Troubleshoot and resolve complex issues in our high-throughput production environment.
  • Evaluate and integrate new technologies to enhance the platform's capabilities.
  • Leverage the latest AI-assisted development tools and best practices.
We're excited about you because...
  • You have 2+ years of experience in backend, infrastructure, or platform engineering.
  • You have experience with gRPC, REST APIs, Protocol Buffers, and service-to-service communication patterns.
  • You have deep knowledge of best practices in Kotlin (or another JVM language) for building high-scale, resilient systems; familiarity with asynchronous/reactive frameworks such as Vert.x is a plus.
  • You have experience working on high-throughput, mission-critical production systems.
  • You have a strong understanding of distributed systems concepts, including consistency, fault tolerance, load balancing, and resilience patterns.
  • You are comfortable with API gateway and proxy concerns - authentication and authorization, request routing, and schema/contract management (e.g., OpenAPI).
  • You value solving problems at the platform level, building abstractions that make life easier for hundreds of engineers.
  • You have proficiency in using AI coding tools (e.g., Claude Code, Codex, Cursor) in the full software development lifecycle, including designing, generating code, testing, monitoring and releasing software

Apply