Jobs in Canada

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Added 22 hours ago
Warehouse Associate
Safety Express Ltd
Richmond, BC
Ability to use or learn various basic software.
Added 22 hours ago
Commercial Property Manager
Hughes Recruitment
Saskatoon, SK
Proficiency in Microsoft Excel, including basic formulas, along with Word and Outlook. Experience with Yardi or similar property management software is an asset.
Added 22 hours ago
SH
Recruitment and Retention Coordinator
SASKATCHEWAN HEALTHCARE RECRUITMENT AGENCY
Saskatoon, SK
- Full-time
- Temporary
-Utilize, support and troubleshoot software that hosts candidate profiles to ensure the Agency has the insights needed to promote career opportunities and service customers in the…
Added 22 hours ago
SD
Teacher - Grade 8 Asynchronous Temporary Teacher
SASKATCHEWAN DISTANCE LEARNING CENTRE
Moose Jaw, SK
- Full-time
- Temporary
Utilize Moodle, Microsoft Teams, and other approved Sask DLC software to manage course content, deliver lessons and communicate with students and colleagues.
Added 22 hours ago
ES
Director Digital Solutions & Business Growth
Empower Simcoe
Barrie, ON
- From $49.54 CAD / hour
- Full-time
Translate business needs into concrete technical software requirements.
Added 22 hours ago
IM
Director of Naval Architecture
Impossible Metals
Collingwood, ON
- Full-time
- On-site
Act as the primary interface between naval architecture activities and Impossible Metals’ robotics, mechanical, electrical, software, marine operations, and leadership teams.
Added 22 hours ago
5735 - Seasonal Sales Help
Hat World Inc.
London, ON
Ability to frequently operate a computer and mobile Point-of-Sale system, as well as maneuver relative software programs.
Added 22 hours ago
5728 - Seasonal Sales Help
Hat World Inc.
Guelph, ON
Ability to frequently operate a computer and mobile Point-of-Sale system, as well as maneuver relative software programs.
Added 22 hours ago
5763 - Seasonal Sales Help
Hat World Inc.
Waterloo, ON
Ability to frequently operate a computer and mobile Point-of-Sale system, as well as maneuver relative software programs.
Added 22 hours ago
5798 - Seasonal Sales Help
Hat World Inc.
Windsor, ON
Ability to frequently operate a computer and mobile Point-of-Sale system, as well as maneuver relative software programs.
Added 22 hours ago
7702 - Seasonal Sales Help
Hat World Inc.
Hamilton, ON
Ability to frequently operate a computer and mobile Point-of-Sale system, as well as maneuver relative software programs.
Added 22 hours ago
AD
Software Development Engineer, ECS
Amazon Development Centre Canada ULC
Vancouver, BC
- Full-time
Amazon ECS is looking for a Software Development Engineer (SDE) to deliver our container orchestration service and accelerate adoption of containers in the cloud. This role includes…
Added 22 hours ago
RC
Senior Systems Testing/QA Specialist
Randstad Canada
Toronto, ON
- Contract
…strategies, master test plans, and scope estimates across the Software Development Life Cycle…
Added 22 hours ago
RC
General Labourer Afternoon Shift - Stayner
Randstad Canada
Stayner, ON
- $18.5 to $19.5 CAD / hour
- Contract
Pay Rate: $18.50/hour (Day Shift) $19.50/hour (Afternoon Shift)
Added 22 hours ago
RC
General Labourer - Stayner
Randstad Canada
Stayner, ON
- $18.5 CAD / hour
- Contract
Pay Rate: $18.50/hour (Day Shift) $19.50/hour (Afternoon Shift)
Added 22 hours ago
RC
Material Handler - Stayner
Randstad Canada
Stayner, ON
- $18.5 CAD / hour
- Contract
Skill Development: Master ERP (Enterprise Resource Planning) software, which is a highly transferable skill in manufacturing and logistics.
Added 22 hours ago
RC
Senior Software Developer
Randstad Canada
Toronto, ON
- Contract
We are seeking an experienced Senior Software Developer specializing in enterprise CRM solutions to lead the technical design, configuration, development, integration, and enhancement of…
Added 22 hours 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 22 hours 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 22 hours ago
RC
IT - Database Analyst V-Oracle
Randstad Canada
Toronto, ON
- $61.47 to $69.3 CAD / hour
- Contract
Work Arrangement: Hybrid (Currently 2 days per week on-site, with potential flexibility up to 4 days)
Added 22 hours ago
L
Senior Support Account Manager
Locala
Montréal, QC
- Full-time
Added 22 hours ago
Scopist (French)
Senate of Canada
Ottawa, ON
Superior knowledge of digital editing software, digital technologies and in Microsoft Office software.
Added 22 hours ago
Sales advisor
Reliance Comfort Limited Partnership o/a Reliance Home Comfort
London, ON
Must have reliable transportation
Added 22 hours ago
Instructor, Nautical Sciences and Naval Specialty (GT-04)
National Defence
Esquimalt, BC · Victoria, BC · Halifax, NS
Added 22 hours ago
PE
Journeyman Insulation Division Manager
Preferred Energy Inc.
Estevan, SK
- Full-time
-Journeyman Heat and Frost Insulator certification required; Red Seal endorsement preferred

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