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Added 8 days ago
Software Engineer - API
CMiC
Toronto, ON
Minimum 3+ years of work experience using any object-oriented programming languages (preferably Java).
Added 8 days ago
B
Automation Lead – Playwright, TypeScript
BeachHead
Toronto, ON
- $65 to $70 CAD / hour
- Contract
Added 8 days ago
SY
Senior Software Engineer
Secure Yourself IT Solutions
Ottawa, ON
- Contract
…frameworks the work calls for. Whether your background is in .NET, Java, Node.js, Python, or another modern development environment, what matters most is your ability to write good code,…
Added 8 days ago
Senior Software Engineer
EarnIn
Vancouver, BC
Proficient in at least one modern programming language, such as Kotlin, Java, C#, Go, Python, or TypeScript, and able to work in more than one.
Added 8 days ago
MS
Senior Product Manager
MSZ Systems
Toronto, ON
- Contract
Exposure to Microsoft Dynamics 365 CRM, MuleSoft, Java, and React.
Added 8 days ago
TI
Senior API Developer
Teckhorizon Inc
Toronto, ON
- Contract
The client is seeking an experienced Senior Software Developer API to design, develop, implement, and maintain enterprise-level APIs, web applications, and system integrations. The ideal…
Added 8 days ago
X
Software Developer
Xe.com
Newmarket, ON
- Full-time
Proven hands-on software development experience, preferably in Java or Kotlin
Added 8 days ago
R&
Java Developer/Java Full Stack Developer III
Robertson & Company Ltd.
Toronto, ON
- Contract
Robertson is seeking a skilled Java Developer/Java Full Stack Developer III to join our client in support of an existing vacancy.
Added 8 days ago
E
Senior Software Engineer
EarnIn
Vancouver, BC
- Full-time
Proficient in at least one modern programming language, such as Kotlin, Java, C#, Go, Python, or TypeScript, and able to work in more than one.
Added 8 days ago
FI
Senior Full Stack Software Developer (FHIR)
Flexstaf I.T. Inc.
Toronto, ON · Greater Toronto Area, Canada
- Contract
Position: Software Developer - Full Stack – Senior
Added 8 days ago
D
Full Stack Developer (Java/Python + Gen AI)
Digitalogia
Brampton, ON
- Contract
Role Description This is a contract Full Stack Developer (Java/Python + Gen AI) role based in Brampton, ON with a hybrid work arrangement, allowing a mix of on-site and work-from-home days.…
Added 8 days ago
F
Staff Frontend Engineer
Forma.ai
Toronto, ON
- Full-time
Improve frontend performance, reliability, accessibility, testing strategy, and developer experience at a systems level.
Added 8 days ago
B
Sr. Java Fullstack Developer-Angular/Banking
BeachHead
Toronto, ON
- $59.48 to $79.66 CAD / hour
- Contract
Working with one of our top financial clients, this role calls for a Sr. Java Fullstack Developer-Angular/Banking to join a collaborative Agile delivery pod supporting a large-scale…
Added 8 days ago
VS
Senior Software Developer
vTech Solution Canada
Toronto, ON
- Contract
Job Title: Sr. Software Developer - Full Stack
Added 8 days ago
T
Software Engineer II - Angular UI
TD
Toronto, ON
- Full-time
Added 8 days ago
C
Senior Java Developer - Vice President
Citi
Mississauga, ON
- Full-time
As a Senior Java Developer, you will design and deliver microservices solutions that power global reference data used by clients across Citi. Working within a global engineering…
Added 8 days ago
TT
Equity Application Support Analyst - Investment Banking
Tech Talent International
Montreal, QC
- $100,000 to $120,000 CAD / year
- Full-time
Develop, test, and maintain applications using Java, Angular, Spring Boot, and related technologies.
Added 8 days ago
H
Production Support Specialist
Hays
Montreal, QC
- Contract
Experience with software development and automation initiatives using scripting languages such as Bash and Python or programming languages including C, C#, Java, Scala, and Go.
Added 8 days ago
RD
Senior Java Software Developer
Randstad Digital
London, ON
- $65 to $75 CAD / hour
- Contract
Our client, is seeking an experienced, highly collaborative Software Developer - Java to join their AI & Open Data Enablement engineering group.
Added 8 days ago
JG
Ab-initio Developer - 8 Years
J2B Global LLC
Mississauga, ON
- Full-time
Data lineage, application development, python or Java coding experience
Added 8 days ago
A
Java Spark Backend Developer
Apptad
Montreal, QC
- Contract
…solutions. The ideal candidate should have strong expertise in Java, SQL, database systems, and Python, along with a willingness to learn and adapt to new…
Added 8 days ago
Y
Software Engineer - QC(Local)
Yochana
Montreal, QC
- Contract
We are seeking a Software Engineer with strong Java development experience to support the security, modernization, and reliability of enterprise applications and file transfer platforms.…
Added 8 days ago
GT
Full Stack Java Developer
Global Technical Talent, an Inc. 5000 Company
Toronto, ON
- $55 to $65 CAD / hour
- Contract
Added 8 days ago
TC
Full Stack Engineer
Tata Consultancy Services
Toronto, ON
- $100,000 to $120,000 CAD / year
- Full-time
Advanced experience as a Fullstack Developer, with hands-on expertise in Java Spring Boot and
Added 8 days ago
C
AVP Senior Java Developer
Citi
Mississauga, ON
- Full-time
The Senior Java Developer is an intermediate level position responsible for participation in the establishment and implementation of new or revised application systems and programs in…

Teckhorizon Inc

Senior API Developer

Toronto, ON, Canada

Contract

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Job details

Job type: Contract
Apply by: Nov 29, 2026
Experience: 10+ years of experience designing and developing large-scale enterprise web applications.
Posting language: English
Posted: Oct 30, 2026

Original job description

The client is seeking an experienced Senior Software Developer API to design, develop, implement, and maintain enterprise-level APIs, web applications, and system integrations. The ideal candidate will have extensive experience in Java development, RESTful APIs, enterprise integration platforms, API security, and relational databases, with the ability to deliver scalable, secure, and high-performing solutions in complex enterprise environments. The successful candidate will collaborate with cross-functional teams to develop technical specifications, implement integrations, troubleshoot application issues, and support the full software development lifecycle.

Key Responsibilities

Design, develop, implement, and maintain RESTful APIs and enterprise integration solutions.
Translate technical system specifications into functional, tested applications.
Develop programming specifications, write code, and conduct unit testing.
Design and implement APIs using enterprise API management platforms such as IBM API Connect, MuleSoft, Apigee, and Azure API Management.
Integrate APIs with enterprise applications, databases, CRM systems, ERP platforms, and case management solutions.
Convert web services between SOAP and REST architectures when required.
Develop and maintain API documentation using OpenAPI (Swagger), YAML, and related standards.
Implement API authentication and authorization mechanisms using OAuth 2.0, JWT, API keys, and TLS.
Configure API gateway policies, including rate limiting, throttling, caching, logging, and request/response transformation.

Must-Have Skills

10+ years of experience designing and developing large-scale enterprise web applications.
10+ years of hands-on Java development with Oracle or SQL databases.
5+ years of REST API and RESTful Web Services development.
Strong experience with API security: OAuth 2.0, JWT, SSL/TLS certificates, and API gateways.
Hands-on experience with enterprise API integration and management platforms such as IBM API Connect, IBM ACE, MuleSoft, or Azure APIM.
Strong understanding of microservices, RESTful architecture, and enterprise integration patterns.
Solid experience with Agile methodologies and SDLC.

Nice-to-Have Skills

Experience integrating with SharePoint, Microsoft Dynamics CRM, Siebel, or Curam.
Knowledge of Apigee, Swagger/OpenAPI, and YAML.
Experience with CI/CD pipelines, DevOps, and cloud platforms.
Familiarity with Docker and Kubernetes.
Experience with event-driven architecture, messaging queues, and middleware/ESB.
Previous experience with Ontario Public Service (OPS) projects.
Knowledge of AODA accessibility and OPS cybersecurity standards.

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More about this job

Responsibilities

Design, develop, test, and maintain enterprise REST APIs, web applications, and integrations with business applications, databases, CRM, ERP, and case management systems. Implement API security and gateway policies, maintain API documentation, troubleshoot issues, and contribute across the software development lifecycle.

Requirements

Requires 10+ years of enterprise web application and Java development, including Oracle or SQL databases, and at least five years of REST API development. Candidates should have strong API security and enterprise API management experience, knowledge of microservices and integration patterns, and experience with Agile and the SDLC.

Skills

Java
RESTful APIs
Enterprise Integration
API Security
Oracle
SQL
OAuth 2.0
JWT
SSL/TLS
API Gateways
IBM API Connect
IBM ACE
MuleSoft
Azure API Management
Microservices
Agile

Visa sponsorship

Not detected in the job text

Keywords

Java
RESTful APIs
RESTful Web Services
Enterprise Web Applications
Enterprise Integration
IBM API Connect
IBM ACE
MuleSoft
Apigee
Azure API Management
Oracle
SQL Databases
OAuth 2.0
JWT
SSL/TLS
API Gateways
Microservices
SOAP
OpenAPI
Swagger
YAML
API Documentation
CI/CD
DevOps
Cloud Platforms
Docker
Kubernetes
Event-Driven Architecture
Agile

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