Jobs in Canada

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Added 1 day ago
GT
Gestionnaire principal(e) de produit, plateforme DevOps / Sr. Product Manager, DevOps Platform
GoTo Technologies Canada Ltd.
Montréal, QC
- Full-time
En tant que Senior Product Manager, DevOps Platform, votre travail inclura les tâches suivantes :
Added 1 day ago
RC
Business Analyst - IT III
Randstad Canada
Waterloo, ON
- $38.36 to $51.15 CAD / hour
- Contract
…initiative, bridging complex business operations and technology engineering delivery. You will lead end-to-end requirements management from initial discovery through implementation,…
Added 1 day ago
HP
Advanced Deployment Technical Consultant
Hewlett Packard Enterprise
Vancouver, BC
- Full-time
…help companies connect, protect, analyze, and act on their data and applications wherever they live, from edge to cloud, so they can turn insights into outcomes at the speed required to…
Added 1 day ago
M
Senior Software Developer
modis
Toronto, ON
- Contract
- Temporary
Akkodis is seeking a highly experienced Senior Software Developer to support the design, development, enhancement, and maintenance of large-scale enterprise applications and business…
Added 1 day ago
HP
Advanced Deployment Technical Consultant
Hewlett Packard Enterprise
Vancouver, BC
- Full-time
…help companies connect, protect, analyze, and act on their data and applications wherever they live, from edge to cloud, so they can turn insights into outcomes at the speed required to…
Added 1 day ago
HP
Advanced Deployment Technical Consultant
Hewlett Packard Enterprise
Vancouver, BC
- Full-time
…help companies connect, protect, analyze, and act on their data and applications wherever they live, from edge to cloud, so they can turn insights into outcomes at the speed required to…
Added 1 day ago
WI
Senior AI Engineer
Workday, Inc.
Vancouver, BC
- Full-time
- Hybrid
Agent Factory is where Workday’s next chapter gets built. We’re forming small, senior, cross-functional AI teams that bring together product leaders, AI engineers, and full-stack builders…
Added 1 day ago
NC
Senior GIS Analyst (PFT) (CUPE 80.26)
Norfolk County
Simcoe, ON
- $34.26 to $42.9 CAD / hour
- Full-time
As the Senior GIS Analyst, you will develop and maintain advanced web-based GIS applications, maps, and data systems that support services across The Corporation of Norfolk County. You’ll…
Added 1 day ago
SL
Director, Domain Enterprise Architect (AI)
Sun Life of Canada - Corporate
Waterloo, ON · Toronto, ON
- Full-time
Bachelor's degree in Computer Science, Engineering, Data Science, Artificial Intelligence, or related field.
Added 1 day ago
A
Business Analyst
Altis
Montréal, QC
- $60 to $75 CAD / hour
- Contract
Are you a data-driven Business Analyst who enjoys connecting business needs with technical solutions? We're looking for a Senior Business Analyst to support a major data and analytics…
Added 1 day ago
RC
Senior Software Developer - Back End
Randstad Canada
Toronto, ON
- Contract
We are seeking an experienced Senior Software Developer - Back End to manage the interchange of data between servers and user-facing applications while engineering robust, accessible, and…
Added 1 day ago
RC
Senior Middleware Specialist
Randstad Canada
Toronto, ON
- Contract
We are seeking an experienced Senior Middleware Specialist to provide technical leadership in the planning, design, integration, deployment, administration, and daily operational support of…
Added 1 day ago
RC
Senior Systems Testing/QA Specialist
Randstad Canada
Toronto, ON
- Contract
We are seeking an experienced Senior Systems Testing/QA Specialist to lead and execute comprehensive manual and automated quality assurance strategies across enterprise application…
Added 1 day ago
RC
Senior Software Developer
Randstad Canada
Toronto, ON
- Contract
We are seeking an experienced Senior Software Developer to lead the technical design, development, systems re-engineering, and implementation of large-scale enterprise web applications. In…
Added 1 day ago
RC
Senior Software Developer - API
Randstad Canada
Toronto, ON
- Contract
We are seeking an experienced Senior Software Developer - API to lead the technical design, development, security, and integration of enterprise-scale RESTful web services and API…
Added 1 day ago
L
Senior Support Account Manager
Locala
Montréal, QC
- Full-time
As a Senior Support Account Manager, you will act as the primary point of contact for internal customer support requests, incidents, and queries related to the use of our internal DSP and…
Added 1 day ago
S
Mechanical Engineer
Socomec
Brampton, ON
- Full-time
- Hybrid
Must possess and maintain a valid passport for international travel
Added 1 day ago
Electrical equipment designer
Johnson Controls
Edmonton, AB
The Senior Electrical Equipment Designer is a technical subject‑matter expert within the Equipment Design Engineering (EDE) department, responsible for leading the execution of complex…
Added 1 day ago
Software Developer - Senior, 14 months contract
Dimensional Tech Inc.
Toronto, ON
Strong expertise in data and business modeling (ERD, BPMN, UML, data flow diagrams, process mapping, etc.).
Added 1 day ago
Inn Power | Director , Stations, Planning and Asset Optimization
The MEARIE Group
Innisfil, ON
Oversee the development and maintenance of asset condition data, risk-based prioritization frameworks, and investment optimization strategies.
Added 1 day ago
M
Support Escalation Management
Microsoft
Vancouver, BC
- $128,000 to $222,400 CAD / year
- Full-time
- On-site
…accounts, often funded directly by customers. Serves as the senior escalation and crisis authority for those accounts, driving alignment and decision-making across internal and external…
Added 1 day ago
T
Senior Geologist Supervisor
Teck
Logan Lake, BC
- $138,000 to $170,000 CAD / year
- Full-time
- On-site
The Senior Geologist Supervisor provides senior technical leadership and project management oversight for geology-driven programs that support resource development, geological modeling, and…
Added 1 day ago
C
Lead Data Engineering
CGI
St. John's, NL
- Full-time
The Sr/Lead Data Engineering is someone who has the skills to lead the engineering team, including strong communication skills and ability to be self sufficient
Added 1 day ago
MS
Principal Product Manager, AI-Powered Security Operations
Motorola Solutions Canada Inc.
Vancouver, BC · Toronto, ON
- Full-time
…features that lead the market. You’ll collaborate closely with senior management, fellow product managers, UX designers, engineering, sales, customer success, and professional services…
Added 1 day ago
C
Senior Machine Learning Systems Engineer, LLM Inference Performance on AWS Trainium
Capgemini
Toronto, ON
- $72,056 to $138,940 CAD / year
Strong written and verbal communication skills, with the ability to explain engineering trade-offs to technical audiences and business impact to senior stakeholders.

Randstad Canada

Senior Software Developer - API

Toronto, ON, Canada

Contract

Apply on randstad.ca About employer

Applications open in a new tab.

Job details

Job type: Contract
Apply by: Dec 28, 2026
Posting language: English
Posted: Oct 30, 2026

Original job description

We are seeking an experienced Senior Software Developer - API to lead the technical design, development, security, and integration of enterprise-scale RESTful web services and API platforms. In this role, you will translate technical system specifications into robust, production-tested applications and microservices. Leveraging deep expertise in Java development, relational databases (Oracle and SQL Server), API management platforms, and modern security protocols (OAuth 2.0, JWT, TLS/SSL), you will build scalable interfaces, implement gateway policies, convert legacy services between SOAP and REST, integrate with core enterprise platforms, and support the full Software Development Life Cycle (SDLC) within an Agile delivery model.

Location: Toronto, ON (Fully Onsite – 5 days/week required)

Duration: 12-month contract.

Advantages
Long-Term Stability: Secure a comprehensive 12-month contract delivering core enterprise integration modernization.

Modern Integration Scope: Lead hands-on development across RESTful APIs, microservices, and enterprise gateway platforms.

Full-Lifecycle Ownership: Drive solutions from technical specification and API modeling through deployment and performance tuning.

Dedicated Onsite Collaboration: Work directly with multidisciplinary technical squads and solution architects in Toronto.

Responsibilities
Translate functional requirements and technical system specifications into working, scalable, tested, and secure API solutions.

Design, develop, code, and implement RESTful APIs, web services, and microservices using Java and modern integration frameworks.

Develop, configure, and maintain API management solutions and gateways (such as Azure APIM, MuleSoft, Apigee, or IBM API Connect).

Implement API gateway policies, including rate limiting, throttling, caching, custom logging, and request/response transformations.

Secure API endpoints and data transmission utilizing OAuth 2.0, JWT, API keys, mutual TLS, and SSL certificates.

Convert legacy web services from SOAP to REST and vice versa to modernize enterprise integration patterns.

Connect APIs to relational databases (Oracle, SQL Server) and enterprise platforms (including CRM systems, SharePoint, and case management tools).

Author comprehensive API specifications, contracts, and documentation using OpenAPI (Swagger) and YAML standards.

Conduct unit testing, integration testing, code reviews, debugging, and root-cause troubleshooting for production and pre-production issues.

Collaborate closely with cross-functional Agile delivery teams, including business analysts, quality assurance specialists, architects, and product owners.

Facilitate technical design walkthroughs and deliver structured knowledge transfer to team members and operational staff.

Qualifications
Large-Scale Web Application Experience: 10+ years of proven experience designing and developing large-scale, multi-client web applications (Strictly Required).

Java & Relational Database Development: 10+ years of hands-on working experience in Java development integrated with Oracle or SQL Server databases (Strictly Required).

REST API & Web Services: 5+ years of dedicated, hands-on experience designing and implementing RESTful APIs, web services, and enterprise integration patterns (Strictly Required).

API Security & Gateway Protocols: Solid working knowledge of API security standards and protocols, including OAuth 2.0, JWT, and SSL/TLS certificate handling (Strictly Required).

Agile Delivery: Proven experience and solid understanding of Agile development methodologies, sprint ceremonies, and iterative delivery (Strictly Required).

Nice-to-Have Assets:
Prior software development or API engineering experience within a public sector or large enterprise environment.

Hands-on experience with API management and ESB platforms such as Azure APIM, MuleSoft, Apigee, or IBM API Connect/ACE.

Experience with containerization tools (Docker) and CI/CD pipelines.

Understanding of digital accessibility standards (AODA/WCAG) and enterprise architectural governance processes.

Summary
If you're interested in the "Senior Software Developer - API" role based in Toronto, we encourage you to apply online at www.randstad.ca.

Only qualified candidates will be contacted for the next steps. We look forward to hearing from you!

Randstad Canada is committed to fostering a workforce reflective of all peoples of Canada. As a result, we are committed to developing and implementing strategies to increase the equity, diversity and inclusion within the workplace by examining our internal policies, practices, and systems throughout the entire lifecycle of our workforce, including its recruitment, retention and advancement for all employees. In addition to our deep commitment to respecting human rights, we are dedicated to positive actions to affect change to ensure everyone has full participation in the workforce free from any barriers, systemic or otherwise, especially equity-seeking groups who are usually underrepresented in Canada's workforce, including those who identify as women or non-binary/gender non-conforming; Indigenous or Aboriginal Peoples; persons with disabilities (visible or invisible) and; members of visible minorities, racialized groups and the LGBTQ2+ community.

Randstad Canada is committed to creating and maintaining an inclusive and accessible workplace for all its candidates and employees by supporting their accessibility and accommodation needs throughout the employment lifecycle. We ask that all job applications please identify any accommodation requirements by sending an email to accessibility@randstad.ca to ensure their ability to fully participate in the interview process.

This posting is for existing and upcoming vacancies.

Apply on randstad.ca About employer

More about this job

Responsibilities

The Senior Software Developer will build, secure and integrate APIs and web services from technical specifications through to deployment. They will connect APIs to databases and enterprise systems, document them, and troubleshoot production issues with Agile teams.

Requirements

Candidates need 10+ years of large-scale web application and Java development with Oracle or SQL Server, and 5+ years of hands-on REST API work. They also need solid knowledge of OAuth 2.0, JWT and SSL/TLS, and Agile delivery experience.

Skills

Java
RESTful APIs
Web services
Microservices
SOAP
Oracle
SQL Server
Azure APIM
MuleSoft
Apigee
IBM API Connect
IBM ACE
OAuth 2.0
JWT
API keys
Mutual TLS
SSL/TLS certificates
OpenAPI
Swagger
YAML
API gateway policies
Rate limiting
Throttling
Caching
Unit testing

Keywords

Senior Software Developer
API developer
Java
REST API
RESTful web services
microservices
SOAP to REST
Oracle
SQL Server
Azure APIM
MuleSoft
Apigee
IBM API Connect
OAuth 2.0
JWT
SSL/TLS
OpenAPI
Swagger
Agile
contract

Seniority

Senior

Tools

Azure APIM
MuleSoft
Apigee
IBM API Connect
Oracle
SQL Server
SharePoint
Docker

Languages

English

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Work requirements

Jobs in Canada