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Contract Back End Developer Jobs in Ontario (NOW HIRING)

RQ00687 - Sr. Software Developer

Toronto, ON · Hybrid

CA$87.38 - CA$104.86/hr

RQ00687 - Sr. Software Developer 9+ month contract (188 business days) - possible extension ONSITE ... years working with backend data and BMC ITSM v9+ features. * 8+ years of experience mapping ...

Net Software Developer (with particular focus on back end development) to join their collaborative ... contract after that. \n \n \n

React Native Developer (Remote, Open Roster Contractor Opportunity) Please note: this is an open ... Understanding of backend frameworks like Express, Node.js, NestJS, or Laravel etc. * Experience ...

Description We are seeking a hands-on senior software engineer who can solve complex backend and ... Write and maintain automated unit, integration, contract, API and end-to-end tests while promoting ...

... website backend (Windows/Linux, Apache, PHP, Docker) * Preparing e-commerce website data (MySQL ... company contract, pricing with vendors and customers * Provide software support to various ...

Design and maintain reliable APIs and backend services that connect ODAIA's data, machine learning ... contracts. * Strong software engineering fundamentals, including modular design, clear interfaces ...

Software Developer

Oakville, ON

  • Medical

  • Dental

  • Retirement

Mid-morning you might drop into a backend slice: a Go service endpoint or a Python data pipeline ... API contract decision. Afternoons often involve a code review - either giving feedback to a ...

Contract Location: Remote Job Summary: We are looking for experienced software engineers to help ... Work on challenging software engineering tasks across backend, full-stack, infrastructure, and ...

Principal Software Engineer

Toronto, ON · Hybrid

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

This role is backend-leaning - you'll spend most of your time on server-side architecture, data ... Take ownership in developer experience by improving/automating CI/CD and other day to day ...

Staff Software Engineer

Toronto, ON · Hybrid

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

This role is backend-leaning - you'll spend most of your time on server-side architecture, data ... Take ownership in developer experience by improving/automating CI/CD and other day to day ...

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Senior Java Engineer (React)

Toronto, ON · On-site

CA$70 - CA$120/hr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Senior Java Engineer Type: 6-month contract + opportunity to extend Location: 1 Queen Street East ... Design, develop, and maintain backend services using Java and Spring Boot. * Contribute to ...

Showing results 41-60

Contract Back End Developer information

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.

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 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.

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.

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.

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:

Infographic showing various Contract Back End Developer job openings in Ontario as of August 2026, with employment types broken down into 71% Full Time, 24% Part Time, 1% Temporary, and 4% Contract. Highlights an 91% Physical, 3% Hybrid, and 6% Remote job distribution.

Senior Full Stack Rust Engineer, Fixed Term - Toronto

DEPT

Toronto, ON

CA$75/hr

Full-time

Re-posted 17 days ago


Job description

WHY DEPT?

We are pioneers at heart. What this means, is that we are always leaning forward, thinking of what we can create tomorrow that does not exist today. We were born digital and we are a new model of agency, with a deep skillset in tech and marketing. That's why we hire curious, self-driven, talented people who never stop innovating.

Our culture is big enough to cope and small enough to care. Meaning, that with people across 20+ countries, we're big enough to provide you with the best tools, global opportunities, and benefits that help you thrive. While acting small by investing in you, your growth, your team, and giving you the autonomy to solve our clients' problems, no matter where you are in the world. 

This is a 3 month fixed term salaried contract, located in Ontario Canada. Preferably in Toronto.

The Role:

We are seeking a Full Stack Rust Engineer to join the team as a hands-on contributor building and maintaining production Rust applications. This role spans backend systems engineering, database query development, and frontend contribution - with the center of gravity firmly on backend Rust development in a distributed, containerized environment. This is a build-and-ship role. The successful candidate writes production Rust, debugs production Rust, and owns the quality and performance of the systems they deliver.

What You'll Do:

  • Design, develop, and maintain production Rust applications, including backend services, APIs, and system-level components
  • Write and optimize complex SQL queries for performance and correctness at scale
  • Debug and troubleshoot Rust applications in production environments, including memory safety issues, concurrency bugs, and performance regressions
  • Contribute to frontend development using React where needed, including integration with micro frontend architectures
  • Participate in the design and implementation of microservice and distributed system architectures
  • Write and maintain comprehensive test suites: unit tests, integration tests, and end-toend tests following established best practices
  • Deploy, monitor, and maintain services in containerized Kubernetes environments
  • Implement and maintain observability (logging, metrics, tracing) and alerting for missioncritical distributed systems
  • Communicate technical decisions and trade-offs clearly to team members at all levels
  • Mentor junior engineers on Rust best practices, systems design, and production engineering discipline
  • Leverage agentic coding assistive tools (e.g., Cursor, Claude CLI) responsibly to accelerate development while maintaining code quality and security standards

What You Bring:

  • 5+ years of experience creating and managing Rust applications in production environments
  • Strong command of Rust's ownership model, lifetime system, trait system, and error handling patterns
  • Experience with the async Rust ecosystem (Tokio, async-std, or equivalent runtimes)
  • Proficiency with common Rust web frameworks and libraries (Actix, Axum, Warp, or equivalent)
  • Demonstrated ability to debug Rust applications in production: diagnosing panics, memory issues, deadlocks, and performance bottlenecks
  • Strong systems/backend engineering experience in a production setting - this is not a prototyping or research role
  • Experience designing and building APIs, background workers, data pipelines, or other backend services that run reliably at scale
  • SQL and Data Strong experience creating scalable and efficient SQL queries, including complex joins, window functions, indexing strategy, and query plan analysis
  • Experience working with relational databases (PostgreSQL, MySQL, or equivalent) in production
  • Familiarity with testing best practices in Rust and broader software engineering
  • Experience writing and maintaining unit tests, integration tests, and ideally propertybased or fuzz tests
  • Understanding of CI/CD pipelines and how testing fits into a production deployment workflow
  • Knowledge of Kubernetes and containerized environments: deploying, scaling, and troubleshooting services running in containers
  • Experience with observability and alerting in mission-critical distributed systems: structured logging, distributed tracing (OpenTelemetry, Jaeger, or equivalent), metrics (Prometheus, Grafana, or equivalent), and alerting configuration
  • Ability to communicate effectively with team members at all levels - engineers, product managers, and leadership
  • Willingness and ability to mentor junior engineers: code review, pair programming, and knowledge sharing on Rust and systems engineering topics

The anticipated hourly range for this position is $75 hourly. Rate is based on a range of factors that include relevant experience, expertise, and organizational impact. This is based on a 40-hour workweek and leveling. Keep in mind, we're flexible. 

WE SUPPORT YOU BEING YOU: 

DEPT is an equal opportunity employer (EOE). We believe our work is its best when our people feel safe and free to be themselves. We're committed to an inclusive and barrier-free recruitment and selection process and workplace, regardless of anyone's lived experience, race, color, religion, sex, national origin, age, disability, and genetic information. So tell us about any accommodations you need. It's totally confidential and only used to make sure you feel fully supported at every step.

DEPT participates in E-Verify, meaning your Form I-9 information will be sent to the federal government to confirm you are authorized to work in the U.S. 

We are a B Corp-certified company passionate about purpose-driven work.  Our hope is that you can feel good about the contributions DEPT is making to the world and we always have an open door for your ideas in making the world a better place. 

DEPT is a pioneering technology and marketing services company that creates integrated end-to-end digital experiences for brands such as Google, KFC, Philips, Audi, Twitch, Patagonia, eBay and more. Its team of 2,500+ digital specialists across 30+ locations on 5 continents delivers pioneering work on a global scale with a boutique culture. 

Learn more about DEPT

DIVERSITY, EQUITY, & INCLUSION

At DEPT, we take pride in creating an inclusive workplace where everyone has an equal opportunity to thrive. We actively seek to recruit, develop, nurture, and retain talented individuals from diverse backgrounds, with varying skills and perspectives.

Not sure you meet all qualifications? Apply, and let us decide! Research shows that women and members of underrepresented groups tend not to apply for jobs when they think they may not meet every requirement, when in fact they do. We believe in giving everyone a fair chance to shine. 

We also encourage you  to reach out to us and discuss any reasonable adjustments we can make to support you throughout the recruitment process and your time with us.

Want to know more about our dedication to diversity, equity, and inclusion? Check out our efforts here.

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