Jobs in Canada

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Added 16 hours 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 16 hours ago
RC
Material Handler - Stayner
Randstad Canada
Stayner, ON
- $18.5 CAD / hour
- Contract
Tech Savvy: Proficiency with Microsoft Office and ERP systems (SAP experience is highly preferred).
Added 16 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 16 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 16 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 16 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 16 hours ago
HP
Child Psychologist (Permanent Full-Time) - Public Health and Children’s Developmental Services - 167620
Health PEI
Charlottetown, PE
- $58.32 to $71.88 CAD / hour
- Full-time
Location – Pediatric Psychology Services, Sherwood Business Centre
Added 16 hours ago
TM
Industry Relations & Business Development Lead
Toronto Metropolitan University
Toronto, ON
- Full-time
Build Partnerships. Drive Business Growth. Shape the Future of Cybersecurity.
Added 16 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
Added 16 hours ago
B
Analyst, Settlement & Structured Transactions
Brookfield
Gatineau, QC
- Full-time
Understand the corporate structure to allocate revenue and charges to the right legal entity and business strategy
Added 16 hours ago
B
Accounts Payable Specialist
Brookfield
Gatineau, QC
- Full-time
Leverage the available AP tools and systems to ensure supplier invoices are effectively processed:
Added 16 hours ago
B
Analyst, Settlement & Structured Transactions (12-month)
Brookfield
Gatineau, QC
- Full-time
Understand the corporate structure to allocate revenue and charges to the right legal entity and business strategy
Added 16 hours ago
B
Accountant
Brookfield
Gatineau, QC
- Full-time
As an Accountant under our Business Services Group, you will be responsible to maintain proper ledgers, registers, accounts, journals as well as similar financial records. In this role, you…
Added 16 hours ago
CCI - Engineering - Pipelines & Facilities - Mechanical Stress Engineer
CCI Group of Companies
Edmonton, AB
…of oil and gas infrastructure projects, including pipeline systems, integrity-driven upgrades, facility piping, pump stations, terminal facilities, metering and transfer systems,…
Added 16 hours ago
CCI - Engineering - Pipelines & Facilities - Mechanical Stress Engineer
CCI Group of Companies
Calgary, AB
…of oil and gas infrastructure projects, including pipeline systems, integrity-driven upgrades, facility piping, pump stations, terminal facilities, metering and transfer systems,…
Added 16 hours ago
S
Mechanical Engineer
Socomec
Brampton, ON
- Full-time
- Hybrid
Must possess and maintain a valid passport for international travel
Added 16 hours ago
CFS Child Protection Investigator
Saskatoon Tribal Council Inc
Saskatoon, SK
Must possess a valid Saskatchewan driver’s license and meet STC’s insurance requirements; · Must be willing to travel 3-4 days per week by vehicle (provided) to STC Member First Nations
Added 16 hours ago
FH
Business analyst
Fraser Health Authority
Surrey, BC
- $38.88 to $55.89 CAD / hour
…Planning, Transformation & Infrastructure portfolio for a temporary Business Analyst opportunity where you can make a meaningful impact, contribute to strategic initiatives, and broaden…
Added 16 hours ago
FH
Coordinator, housekeeping services
Fraser Health Authority
Burnaby, BC
- $35.36 to $50.83 CAD / hour
…housekeeping services. Coordinates the implementation of new systems, initiatives, policies and procedures. Participates on various committees as…
Added 16 hours ago
Laa -securities
Impact Recruitment
Vancouver, BC
…professional development and encouraged to grow alongside the business. With a focus on delivering high-quality legal services, the firm offers an engaging environment for professionals…
Added 16 hours ago
RC
Infrastructure Manager
Randstad Canada
Aurora, ON
- $120,000 to $145,000 CAD / year
- Full-time
…and manage end-user computing strategy, disaster recovery and business continuity management, and IT security policies and standards to support secure, scalable business operations within…
Added 16 hours ago
RC
Manager, Business Systems
Randstad Canada
Aurora, ON
- $120,000 to $145,000 CAD / year
- Full-time
The Manager, Business Systems provides management oversight of business applications and end-user software supporting the functional and operational teams. The IT Team supports the key…
Added 16 hours ago
RC
Senior Product Manager
Randstad Canada
Toronto, ON
- Contract
…In this role, you will serve as the primary bridge between business stakeholders, end users, engineering teams, vendors, and senior leadership, translating operational needs into clear…
Added 16 hours ago
EE
Director of Parts and Service
Express Employment Professionals
Halifax, NS
- $115,000 to $135,000 CAD / year
- Full-time
- Contract
Oversee maintenance and inventory management systems, ensuring accurate reporting, recordkeeping, and operational data.
Added 16 hours ago
WI
Business Development Representative
Willson International Ltd.
Fort Erie, ON · Halifax, NS · Fredericton, NB · Ottawa, ON · Richmond, BC · Sarnia, ON · Mississauga, ON · Peterborough, ON · Windsor, ON · Stoney Creek, ON
- Full-time
We’re growing - and we’re looking for a driven, results-oriented Business Development Representative (BDR) who is excited about contributing to our sales engine and building a long-term…

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