25 Best back end developers jobs in mississauga, on (Hiring Now!)

API and Integration Tech Lead
Definity Financial Corporation —Toronto, ON
As a senior technical expert, you will provide hands-on guidance to the development team, set solution standards, and ensure that the platform capabilities…
16h
Backend Engineer
Happy Dad —Toronto, ON
Bachelor's degree in Computer Science, Information Technology, or a related field. Apply object-oriented programming principles to develop reusable code and…
$90,000–$100,000 a year
Quick apply
Full Stack Developer, LearnwithAI (Remote) - $100,000/year USD
Crossover —Mississauga, ON
At least 2 years of experience being the primary technical contributor for a development team OR software product.
Quick apply
2d
Software Engineer - API
CMiC —Toronto, ON
In accordance with the Accessibility for Ontarians with Disabilities Act, 2005 and the Ontario Human Rights Code, CMiC will provide accommodation to applicants…
Quick apply
API & Integration Technical Lead
Definity Financial Corporation —Toronto, ON
As a senior technical expert, you will provide hands-on guidance to the development team, set solution standards, and ensure that platform capabilities align…
$77,700–$157,000 a year
Java Developer
CMiC —Toronto, ON
Provide estimates for development items and consistently meet estimate and programming deadlines. In accordance with the Accessibility for Ontarians with…
Quick apply
14d
Junior Front End Developer
Poket —Toronto, ON
Ability to establish best practices for unit, integration, end-to-end, and visual testing guidelines in React and front-end development.
$18–$19 an hour
Quick apply
Lead Software Engineer, LearnwithAI (Remote) - $100,000/year USD
Crossover —Canada
At least 2 years of experience being the primary technical contributor for a development team OR software product.
Quick apply
2d
Full-Stack Developer
Garo —Ontario
Stay updated: Keep up with the latest trends and technologies in development, proposing improvements to the current stack when relevant.
$65,000–$90,000 a year
Quick apply
10d
Software Developer (New Graduate 2024)
Acentury —Richmond Hill, ON
*Education:* A Bachelor’s or Master’s degree in computer science or a directly related field, obtained by Dec 2024 from an accredited university;
Quick apply
2d
Manager, Software Development
eBay —Toronto, ON
As the lead engineer you will supervise aspects of the software lifecycle : design, development, testing and experimentation. Knowledge in Java is a plus.
Front-End Developer (React)
Monzek Consulting —Toronto, ON
Collaborate with stakeholders to ensure effective application design and development. Your premium skills in TypeScript and unit testing will ensure high…
$80–$100 an hour
Quick apply
4d
Senior Backend Developer
StoreForce —North York, ON
Complete programming of assigned software components for on-time delivery; development projects will include SQL, CLR, ASP. SQL Server: 5 years (required).
From $110,000 a year
Quick apply
Front End Developer
KUBRA —Mississauga, ON
KUBRA offers billing and payments, mapping, mobile apps, proactive communications, and artificial intelligence solutions for customers.
Quick apply
Lead Backend Developer
StoreForce —North York, ON
Participate in development discussions to collaborate on architecture, functionality, and API design for a more distributed system.
From $120,000 a year
Quick apply
Node js developer
Innova Software Services —Toronto, ON
Establishes and defines development, test, release, update, and support procedures for DevOps operations. Investigates and resolves technical issues, provides…
$35.23–$75.00 an hour
Quick apply
Senior Unity Developer, LearnwithAI (Remote) - $200,000/year USD
Crossover —Toronto, ON
You'll establish technical patterns, guide the team through complex decisions, spearhead the adoption of AI within our development process, and build a game…
Quick apply
2d
Junior Software Developer (hybrid)
Rewind Software —Toronto, ON
Looking for ways to improve our development and deployment processes. 2 Level Up days for professional development. Have a problem-crushing attitude.
Quick apply
8d
CoreMedia Content Cloud Developer
Arvato Systems North America, Inc. —Toronto, ON
Continuously monitor and optimize cloud resources to ensure optimal performance, scalability, and cost efficiency, including implementing auto-scaling, load…
$86,500 a year
Quick apply
Java Developer
Fintek Soft Inc —Mississauga, ON
This role requires collaboration with cross-functional teams to design, develop, and maintain software solutions that meet business needs.
$74,227.08 a year
Quick apply
Wordpress Developer
dNovo Group —Toronto, ON
As a WordPress Developer, you will be responsible for the development, customization, and maintenance of our WordPress websites. Fluent English is a MUST.
$38,142.80–$96,408.11 a year
Quick apply
Junior Developer
Synergy Gateway Verified Inc. —Mississauga, ON
Bachelor’s or Masters's degree in Computer Science or a related field. Node.js (back-end development). Work from home (There will be in person sessions needed).
$70,000–$95,000 a year
Quick apply
7d
Back End Developer
Stacktics —Toronto, ON
Demonstrated proficiency in managing the entire software development lifecycle, from initial conception and design to coding, testing, deployment, and…
Software Developer
Activate Games —Toronto, ON
The successful candidate is experienced and thrives in high paced environment with competing priorities and enjoys a sales-focused software development…
$90,000–$100,000 a year
Quick apply
10d
Application Developer
Great Gulf Group —Toronto, ON
Bachelor of Computer Science or Engineering, College Programming degree in web and mobile application development, or equivalent industry experience.
Quick apply

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API and Integration Tech Lead

Definity Financial Corporation Toronto, ON

Apply Now

Job details

Full-time 16 hours ago

Benefits

RRSP match
Tuition reimbursement
Paid time off
Company pension

Skills

Node.js
Computer Science
Kubernetes
Information Systems
Google Cloud Platform
Java
Master's degree
Microservices
AWS
Analysis skills
Bachelor's
REST
APIs
Information processing
Kafka
GraphQL
Business requirements
Communication skills
Python

Full job description

Definity is the parent company to some of Canada’s most long-standing and innovative insurance brands, including Economical Insurance, Sonnet Insurance, Family Insurance Solutions, and Petline Insurance. Our ambition is to be one of Canada’s leading and most innovative property and casualty insurers. We can’t do that without our people, so we embrace and encourage a culture that’s collaborative, ambitious, rewarding, and empowering.

We offer a flexible, hybrid work experience where employees work from the office and virtually depending on the type of work they are doing and who they are working with. Bring your true self and be a part of our journey. It’s better here.

API & Integration Tech Lead Role Overview:

The API & Integration Technical Lead is a hands-on technical leader responsible for designing and delivering comprehensive integration solutions that support enterprise-scale platforms. This role will lead the solution delivery of end-to-end integration strategies, including cloud-native, on-premises, and hybrid integration models, focusing on APIs, microservices, event-based architectures, and real-time data processing. A key responsibility will be to lead ESB remediation and cloud modernization as part of the broader shared service integration initiatives. Additionally, the role will contribute to implementing integration patterns and reusable frameworks that align with the target integration architecture and drive innovation by conducting proof of concepts (POCs) on new patterns and technologies. As a senior technical expert, you will provide hands-on guidance to the development team, set solution standards, and ensure that the platform capabilities align with both business and technology strategies.

Key Responsibilities:

Technical Leadership & Modernization:

Serve as a hands-on technical lead in designing and implementing cloud-native and hybrid integration solutions using a variety of patterns, including APIs, microservices, and event-based architectures.
Lead the modernization of legacy integrations to cloud-based platforms as part of the shared service mandate, ensuring high scalability, resilience, and security.
Develop robust integration solutions using platforms such as Apigee, Kafka, and GCP Pub/Sub.
Provide technical direction and mentorship to the development team, ensuring the adoption of best practices and modern integration patterns.

Integration Solution Engineering:

Design and implement integration solutions across cloud platforms (GCP, AWS) using managed services like Cloud Functions, AWS Lambda, GKE, EKS, and data processing tools.
Implement hybrid integration patterns that connect legacy systems, cloud services, and modern applications.
Define scalable data processing pipelines to support high-throughput, real-time streaming, and batch integration use cases.
Contribute to building and implementing reusable integration frameworks that align with the target integration architecture.
Collaborate on the development of standardized and reusable components to enable consistent solution delivery across multiple domains.

Innovation & POC Development:

Drive innovation by conducting proof of concepts (POCs) to evaluate new integration patterns, emerging technologies, and design approaches.
Research and prototype solutions for complex integration scenarios, assessing feasibility, scalability, and performance.
Actively contribute to the continuous improvement of integration practices by testing new frameworks, tools, and methodologies.

Mentorship and Team Development:

Mentor and guide the development team, promoting a collaborative, hands-on technical culture.
Act as a subject matter expert (SME) in cloud-native and modern integration techniques, providing technical training and support to teams across the organization.

takeholder Engagement:

Engage with business and technology stakeholders to translate complex business requirements into scalable integration solutions.
Collaborate with product owners and project managers to define roadmaps and shared service integration strategies.

Solution Delivery:

Oversee the delivery of complex integration solutions from concept through implementation, ensuring high-quality, scalable, and secure solutions.

Qualifications:

Education:

Bachelor’s or Master’s degree in Computer Science, Information Systems, or a related field.

Experience:

10+ years of experience in enterprise integration, API development, and system solutions.
5+ years of experience with cloud platforms (GCP, AWS) and associated integration services.
Proven track record of leading complex modernization initiatives, including ESB to cloud-native transformations, as part of a broader shared service mandate.
Hands-on experience with microservices frameworks, container orchestration (Kubernetes), and real-time data processing pipelines.
Experience designing and implementing hybrid and multi-cloud integration solutions.

Technical Skills:

Strong proficiency in Java, Python, or Node.js for backend service development.
Deep expertise in integration platforms and technologies: Apigee, Kafka (Confluent), GCP Pub/Sub, AWS SNS/SQS, Cloud Run.
Experience with API design, security standards (OAuth, JWT), and RESTful/GraphQL services.
Proficiency in data processing frameworks
Strong understanding of event-driven architectures, including Kafka streams and event sourcing.

Soft Skills:

Strong analytical, problem-solving, and decision-making abilities.
Excellent communication and stakeholder management skills.
Ability to lead, mentor, and inspire diverse teams.
Self-starting, ability to navigate unknown

Nice-to-Have:

Certification in GCP or AWS.
Experience with Anthos and hybrid cloud deployments.
Familiarity with modernization frameworks
Financial & Insurance industry service integration experience

Interested in this role, but don’t meet every requirement? We encourage you to apply! We know from experience that a candidate doesn’t need 100% of the qualifications listed to bring incredible value to our team. We’re actively seeking diverse backgrounds and perspectives to help us make insurance better. At Definity, inclusion, diversity, and equity aren’t just “nice to have” — they’re essential to our success.

What’s in it for you?

Hybrid work schedule for most roles
Company share ownership program
Pension and savings programs, with company-matched RRSP contributions
Paid volunteer days and company matching on charitable donations
Educational resources, tuition assistance, and paid time off to study for exams
Focus on inclusion with employee groups, support for gender affirmation surgery, access to BIPOC counsellors, access to programs for working parents
Wellness and recognition programs
Discounts on products and services

Actual salary for the role may vary depending on work location of the successful candidate and other factors including but not limited to, skills, education, experience, working conditions and the local labour market. In addition to base pay, eligible employees may participate in various incentive plans which are paid out at the discretion of the company and subject to individual and company performance.

Go ahead and expect a lot — you deserve it.

It’s better here — but don’t take our word for it. Definity was named by Great Place to Work ® as one of the Best Workplaces™ in Canada for women, for youth, and for inclusion.

Our inclusive work environment welcomes diversity and supports accessibility. If you require accommodation at any time during the recruitment process, please let us know by contacting [email protected] .

Background checks

This role requires successful clearance of background checks (including criminal checks and leadership references).

#LI-Hybrid

#IND1

Apply Now

back end developers jobs in mississauga, on

API and Integration Tech Lead

Backend Engineer

Full Stack Developer, LearnwithAI (Remote) - $100,000/year USD

Software Engineer - API

API & Integration Technical Lead

Java Developer

Junior Front End Developer

Lead Software Engineer, LearnwithAI (Remote) - $100,000/year USD

Full-Stack Developer

Software Developer (New Graduate 2024)

Manager, Software Development

Front-End Developer (React)

Senior Backend Developer

Front End Developer

Lead Backend Developer

Node js developer

Senior Unity Developer, LearnwithAI (Remote) - $200,000/year USD

Junior Software Developer (hybrid)

CoreMedia Content Cloud Developer

Java Developer

Wordpress Developer

Junior Developer

Back End Developer

Software Developer

Application Developer

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