Jobs in Canada

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Added 14 days ago
WI
Senior AI Engineer
Workday, Inc.
Vancouver, BC
- Full-time
- Hybrid
…responsibly. High trust, high expectations, and real impact. Engineering, but…
Added 14 days ago
DN
CyberDet & Underground EIS Specialist
Dyno Nobel
Canada
- Full-time
Added 14 days ago
CS
Customer Delivery Architect
Cisco Systems Canada Co.
Montréal, QC
- Full-time
- Hybrid
We partner with customers, sales teams, and engineering groups to deliver comprehensive solutions. We work alongside internal and external partners to deploy Cisco services, maintaining…
Added 14 days ago
CS
Customer Delivery Architect
Cisco Systems Canada Co.
Montréal, QC
- Full-time
- Hybrid
We partner with customers, sales teams, and engineering groups to deliver comprehensive solutions. We work alongside internal and external partners to deploy Cisco services, maintaining…
Added 14 days ago
BV
Senior DevOps Developer
Boeing Vancouver
Richmond, BC · Vancouver, BC
- Full-time
- Hybrid
This role demands a strong blend of infrastructure engineering expertise, deep knowledge of Azure cloud services, and hands-on proficiency with Databricks or other data platform from a…
Added 14 days ago
Staff Engineer, Site Reliability
Babylist
Canada
Babylist's Platform team is the foundation every engineering team builds on - and this role is at the center of keeping it reliable, fast, scalable, and secure. As a Staff SRE, you'll own…
Added 14 days ago
RC
Cloud Engineer
Randstad Canada
Toronto, ON
- $0.06 CAD / hour
- Contract
…automation, infrastructure as code (IaC), and cloud reliability engineering capacity, specializing in designing, building, and operating production-grade automation frameworks across…
Added 14 days ago
RC
Azure Platform Engineer
Randstad Canada
Toronto, ON
- $0.06 CAD / hour
- Contract
…opportunity. In this role, you will take on a premier platform engineering, Kubernetes architecture, and cloud infrastructure capacity, specializing in designing, deploying, and operating…
Added 14 days ago
RC
Senior Cloud Security Engineer
Randstad Canada
Toronto, ON
- $0.06 CAD / hour
- Contract
We are seeking a highly accomplished Senior Cloud Security Engineer for an enterprise-level contract-to-permanent opportunity. In this role, you will take on a premier cloud security…
Added 14 days ago
RC
Senior Database Administrator
Randstad Canada
Toronto, ON
- $0.06 CAD / hour
- Contract
As a Senior DBA, you will bridge the gap between cloud infrastructure engineering, application development squads, cybersecurity governance, and platform reliability operations. Operating…
Added 14 days ago
SL
Director, Domain Enterprise Architect (AI)
Sun Life of Canada - Corporate
Waterloo, ON · Toronto, ON
- Full-time
At Sun Life, we're driven by our Purpose: helping our Clients achieve lifetime financial security and live healthier lives. Our values shape how we work: caring, authentic, bold, inspiring,…
Added 14 days ago
EP
Distribution Grid Modeling and Analytics - Engineer Staff III
Electric Power Research Institute
Canada
- $92,000 to $101,000 USD / year
- Full-time
Preferred MS or PhD in Electrical Engineering with Power System emphasis
Added 14 days ago
P/
Associate Software Engineer
PheedLoop / NordSpace
Toronto, ON
- Full-time
Strong engineering fundamentals in backend development, frontend systems, databases, APIs, security, and clean code.
Added 14 days ago
SU
Heavy Equipment Operator -Goose Bay- Seasonal- Term
Serco USA
NL
- Full-time
- Temporary
…comprehensive air operations, emergency services, logistics and engineering expertise to the Department of National Defence. We work on behalf of DND’s “no fail” mission at Goose Bay:…
Added 14 days ago
RC
DevSecOps Platform Engineer
Randstad Canada
Remote, Canada
- $65 to $78 CAD / hour
- Contract
- Remote
Do you bring several years of hands-on DevSecOps engineering experience, acting as the bridge between application delivery, security, and cloud infrastructure?
Added 14 days ago
RC
Senior Software Developer - Back End
Randstad Canada
Toronto, ON
- Contract
…of data between servers and user-facing applications while engineering robust, accessible, and high-performance digital services. In this role, you will translate technical system…
Added 14 days ago
RC
Senior Middleware Specialist
Randstad Canada
Toronto, ON
- Contract
…automated release pipelines, and ensure high availability, security, and reliability across enterprise…
Added 14 days ago
T
Power Platform Reporting Co-op
Teck
Vancouver, BC
- $4,108 to $5,183 CAD / month
- Full-time
- Temporary
- Hybrid
…Science, Data Science, Information Technology, Business Analytics, Engineering, Business Administration, Commerce, or related fields. Candidates should be in their third or fourth year of…
Added 15 days 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 15 days 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 15 days ago
Instructor, Nautical Sciences and Naval Specialty (GT-04)
National Defence
Esquimalt, BC · Victoria, BC · Halifax, NS
…Canada and Canadians and contribute to international peace, security, and stability…
Added 15 days ago
WS
Environment Officer
Water Security Agency Moose Jaw
Regina, SK
- Full-time
The successful candidate will have a degree in natural or physical sciences, environmental or civil engineering, integrated environmental sciences, biology, chemistry, or physicsor an…
Added 15 days ago
WS
Environment Officer
Water Security Agency Moose Jaw
Prince Albert, SK
- Full-time
The successful candidate will have a degree in natural or physical sciences, environmental or civil engineering, integrated environmental sciences, biology, chemistry, or physicsor an…
Added 15 days ago
WS
Environment Officer
Water Security Agency Moose Jaw
North Battleford, SK
- Full-time
The successful candidate will have a degree in natural or physical sciences, environmental or civil engineering, integrated environmental sciences, biology, chemistry, or physicsor an…
Added 15 days ago
WS
Environment Officer
Water Security Agency Moose Jaw
Meadow Lake, SK
- Full-time
The successful candidate will have a degree in natural or physical sciences, environmental or civil engineering, integrated environmental sciences, biology, chemistry, or physicsor an…

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