Jobs in Canada

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Added 11 days ago
JA
System Design Specialist, Intermediate
JR Automation
Toronto, ON
- Full-time
Angular, TypeScript, WebSockets, Java-based back-end development.
Added 11 days ago
JA
Software Architect - Vital Software
JR Automation
Toronto, ON
- Full-time
Knowledge of Angular, TypeScript, WebSockets, and Java-based backend development.
Added 11 days ago
SG
Sr. Forward Deployed Engineer
Software Guidance & Assistance, Inc. (SGA, Inc.)
Mississauga, ON
- Full-time
The ideal candidate is already an experienced Full-Stack/Backend Architect (Java and/or Python) who thrives in ambiguous, fast-paced client environments, can rapidly translate complex…
Added 11 days ago
SI
Software Engineer
Syndesus, Inc.
Vancouver, BC
- $130,000 to $160,000 CAD / year
- Full-time
This is a low‑commute hybrid role; five days per week on‑site is not expected
Added 11 days ago
C
Sr. Consultant, Back End Developer- Java
CIBC
Toronto, ON
- Full-time
You need to be legally eligible to work at the location(s) specified above and, where applicable, must have a valid work or study permit
Added 11 days ago
Senior QA Engineer
Konrad
Toronto, ON
…into complex digital products across web, mobile, API, and backend systems. You will combine strong software engineering and test automation skills with modern AI-assisted development and…
Added 11 days ago
QA Architect
Konrad
Toronto, ON
Architect, build, and scale maintainable automated testing solutions across web, mobile, API, integration, and backend systems.
Added 11 days ago
MI
Intermediate Full-Stack Developer
Method Integration Inc.
Remote, Canada
- $70,000 to $90,000 CAD / year
- Full-time
- Remote
Strong backend fundamentals in C# / .NET Core, or equivalent in Java, Node or a comparable stack.
Added 11 days ago
S
Associate Software Development Engineer in Test (SDET)
SOTI
Mississauga, ON
- Full-time
Job Title: Associate Software Developer in Test
Added 12 days ago
M
RQ00828 - Software Developer - Full Stack - Senior
Maarut
Toronto, ON
- Contract
Senior-level experience developing Java and Node.js services, REST APIs, FHIR integrations, event publishers and consumers, and production application logic.
Added 12 days ago
SL
Senior Software Engineer, Operations – Core Java & iOS focus
Sun Life
Toronto, ON · Waterloo, ON · Sun Life Waterloo King
- Full-time
We are looking for a Senior Software Engineer with strong full-stack Java experience and hands-on iOS development skills. You will develop and support reliable applications across the web,…
Added 12 days ago
SC
Senior Developer
SAP Careers
Montreal, QC
- $108,100 to $222,800 CAD / year
- Full-time
We are looking for a dynamic and motivated Senior Software Developer who embrace AI-assisted software development as part of their everyday engineering practice to join our engineering…
Added 12 days ago
AS
Mobile Developer (React Native)
Apex Systems
Toronto, ON
- $60 to $70 CAD / hour
- Full-time
Must Have skills:
Added 12 days ago
B
QA Automation Lead - ATM/POS/Payments
BeachHead
Toronto, ON
- $70 to $75 CAD / hour
- Contract
Coordinate QA activities across approximately 70% backend testing and 30% user interface testing.
Added 12 days ago
CC
Core Software Developer
Circle Cardiovascular Imaging
Calgary, AB
- Full-time
The Software Developer is responsible for the development of the next generation cardiovascular post-processing software and the maintenance of our existing revenue-driving products. The…
Added 12 days ago
RC
Senior Backend Java Developer
Realtek Consulting LLC
Toronto, ON
- Contract
We are seeking 8-12 years experienced highly skilled Senior Backend Java Developer with strong expertise in Java, Spring Boot, Microservices, API Integration, Azure Cloud, and…
Added 12 days ago
AC
Fullstack Developer
Adastra Corporation
Markham, ON
- Contract
We are looking for a Full Stack Developer to build scalable, production-ready applications that combine modern backend engineering with advanced AI and Generative AI capabilities. The role…
Added 12 days ago
CC
Core Software Developer
Circle Cardiovascular Imaging
Calgary, AB
- Full-time
The Software Developer is responsible for the development of the next generation cardiovascular post-processing software and the maintenance of our existing revenue-driving products. The…
Added 12 days ago
FG
Software Developer | Banking & Capital Markets
FDM Group
Toronto, ON
- Contract
This role will be hybrid with requirements to be in office 3 days per week
Added 12 days ago
TI
Full Stack Developers
Teckhorizon Inc
Toronto, ON
- Contract
Strong experience developing Java and Node.js backend services, REST APIs, FHIR integrations, and event-driven applications.
Added 12 days ago
I
Software Developer - Full Stack - Senior (Health)
isgSearch
Toronto, ON · Greater Toronto Area, Canada
- Full-time
Candidates must have hands-on experience with healthcare applications, clinical workflows, and healthcare interoperability standards · Required Skills - Must Have
Added 12 days ago
RT
Sr. Software Developer - Full Stack
Russell Tobin
Toronto, ON
- $90 to $95 CAD / hour
- Contract
Job Title: Sr. Software Developer - Full Stack
Added 12 days ago
C
VP Senior Software Engineer – Java & Distributed Systems
Citi
Mississauga, ON
- Full-time
Design and build backend services end to end - from requirements and architecture through implementation, testing, and delivery
Added 12 days ago
C
Java Developer - Assistant Vice President
Citi
Mississauga, ON
- Full-time
As a Senior Java Backend Developer, you will design and build high-performance backend services that power large-scale data processing applications at Citi. You'll apply modern Java and…
Added 12 days ago
E
Data Engineer
eBay
Toronto, ON
- Full-time
…to develop scalable data platforms and services that improve developer productivity, system performance, and operational…

Adastra Corporation

Fullstack Developer

175 Commerce Valley Dr. W Suite 301, Markham, ON, L3T 7P6, Canada

Contract

Apply on careers.adastracorp.com About employer

Applications open in a new tab.

Job details

Job type: Contract
Apply by: Oct 28, 2027
Posting language: English
Posted: Oct 28, 2026

Original job description

Overview

We are looking for a Full Stack Developer to build scalable, production-ready applications that combine modern backend engineering with advanced AI and Generative AI capabilities. The role will focus primarily on developing backend services and reusable SDKs using Python and Java, as well as integrating technologies such as large language models, retrieval-augmented generation, agentic AI, and model context protocols. You will also contribute to frontend development, cloud-based AI platforms, and the delivery of secure, reliable, and maintainable enterprise solutions

Primary Location: Toronto, ON or Brampton, ON

Work Model: Hybrid 4-Days Onsite

Employment Type: Contractor

RESPONSIBILITIES:

Design, develop, and maintain scalable backend services, APIs, and reusable SDKs using Python and Java
Build backend solutions using FastAPI, Spring Boot, and microservices architecture
Develop AI-powered applications using large language models, retrieval-augmented generation, agentic AI, LangChain, LangGraph, and Model Context Protocol
Integrate commercial and open-source AI models into enterprise applications
Build responsive web applications using React, TypeScript, and modern frontend frameworks
Integrate frontend applications with backend APIs and AI-powered services
Develop and integrate AI platform capabilities, including model gateways, prompt management, vector databases, evaluation frameworks, and guardrails
Deploy and support applications using cloud platforms, Docker, Kubernetes, and CI/CD pipelines
Implement automated testing, observability, performance optimization, and secure API design
Support enterprise authentication and authorization requirements
Collaborate with engineering, product, and cross-functional teams to deliver scalable and maintainable solutions

QUALIFICATIONS, SKILLS & EXPERIENCE:

Strong hands-on backend development experience using both Python and Java
Experience designing and developing scalable APIs, backend services, and reusable SDKs
Hands-on experience with FastAPI, Spring Boot, and microservices architecture
Strong experience developing AI and Generative AI applications
Experience working with large language models, retrieval-augmented generation, and agentic AI
Hands-on experience with technologies such as LangChain, LangGraph, and Model Context Protocol
Experience integrating commercial or open-source AI models into applications
Experience developing frontend applications using React and TypeScript
Understanding of software engineering principles, API design, automated testing, and application security
Experience delivering reliable, scalable, and production-ready software solutions
Strong collaboration and problem-solving skills

NICE TO HAVE:

Experience with AI platform capabilities such as model gateways, prompt management, vector databases, evaluation frameworks, and guardrails
Experience with Google Cloud Platform or another major cloud platform
Experience with Docker and Kubernetes
Experience building and maintaining CI/CD pipelines
Experience with observability, application monitoring, and performance optimization
Knowledge of enterprise authentication and authorization patterns
Experience supporting the full lifecycle of AI-powered applications

ABOUT ADASTRA

Adastra is a global leader in AI and data-driven transformation, helping organizations lead with artificial intelligence - responsibly, strategically, and at scale. With over 25 years of experience, Adastra empowers enterprise clients to unlock business value through data innovation, operational excellence, and smart customer engagement.

Trusted by some of the world’s most prominent brands, Adastra delivers end-to-end solutions grounded in thoughtful strategy, robust governance, and deep technical expertise. From defining vision to ensuring execution, Adastra guides organizations through every stage of their AI, data and cloud journey - building future-ready capabilities and delivering measurable, lasting impact.

Adastra serves clients across key industries including financial services, automotive, manufacturing, technology, media and telecom (TMT), healthcare, retail, and professional services. The company employs more than 2,000 professionals across North America, Europe, and Asia.

WHAT WE OFFER

Opportunity for advancement and career progression
Competitive compensation
Successful referral program
The opportunity to work with one of Canada’s 50 Best Managed Companies
Satisfaction of working for a reputable company
A flexible, dynamic, and diverse workplace

EQUAL OPPORTUNITY EMPLOYER

In our commitment to promote fair and equitable treatment of all employees and applicants, Adastra Corporation provides equal employment opportunities for all individuals regardless of age, sex, disability, race, ethnic origin, citizenship, creed, sexual orientation, marital status, or any other ground as described in the Ontario Human Rights Code. In addition, accommodation will be provided during the hiring process. Adastra Corporation’s implementation and support of employment initiatives, encourage diversified labour force participation and equal access to opportunities based on merit and performance.

AI Usage - Our hiring process includes the use of AI-enabled tools to screen applications (e.g., keyword matching, qualification ranking). A human recruiter reviews all AI-generated shortlists to make informed hiring decisions.

There has been an increased instance of fraudulent job offers coming from people posing as Adastra HR employees. Please note that Adastra will never request fees as part of our recruiting process and any emails sent to you that are not from ‘@adastragrp.com’ or ‘@talent.icims.com’ are fraudulent. All employment offers are sent via DocuSign and if you receive an employment offer from a suspicious email and not via DocuSign, it is fraudulent.

Contact careers@adastragrp.com to inquire about jobs at Adastra, to report a suspicious request for money or personal information from external websites or suspicious employment offers.

Apply on careers.adastracorp.com About employer

More about this job

Responsibilities

Design and develop scalable backend services, APIs, and reusable SDKs using Python and Java. Build AI-powered applications integrating large language models, retrieval-augmented generation, and agentic AI frameworks.

Requirements

Requires strong hands-on experience in backend development with Python and Java, alongside proficiency in microservices and AI technologies. Candidates must also demonstrate experience in frontend development with React and TypeScript, and cloud-based deployment.

Skills

Python
Java
FastAPI
Spring Boot
React
TypeScript
Microservices
Large Language Models
Retrieval-Augmented Generation
LangChain
LangGraph
Docker
Kubernetes
CI/CD
API Design
Cloud Platforms

Benefits

Competitive compensation
Career progression opportunities
Referral program

Visa sponsorship

Not detected in the job text

Keywords

Fullstack Developer
Python
Java
FastAPI
Spring Boot
Microservices
Large Language Models
Retrieval-Augmented Generation
Agentic AI
LangChain
LangGraph
Model Context Protocol
React
TypeScript
Docker
Kubernetes
CI/CD
Cloud Platforms
Vector Databases
Prompt Management
API Design
Observability
Performance Optimization
Enterprise Authentication
Software Engineering
AI Platform
Data Innovation
Generative AI
Scalable Applications
Production-ready

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Work requirements

Jobs in Canada