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Added 2 hours ago
VI
Senior Java/J2ee Developer
Veriday Inc.
Mississauga, ON
- Contract
Veriday Inc. is looking for a Senior Java Spring Developer for one of our reputed Banking clients for a 6-month contract with potential extension. You'll join the Spread Products Risk and…
Added 3 hours ago
VI
Senior Java Consultant
Veriday Inc
Mississauga, ON
- $70 to $90 CAD / hour
- Contract
Veriday Inc. is looking for a Senior Java Spring Developer for one of our reputed Banking clients for a 6-month contract with potential extension. You'll join the Spread Products Risk and…
Added 5 hours 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 6 hours 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 7 hours 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 7 hours ago
O
Sr. Software Developer
OpenText
Richmond Hill, ON
- Full-time
The Senior Software Developer is a hands-on technical contributor and emerging technical lead who designs, develops, and supports Java and Spring Boot microservices running on Google Cloud…
Added 7 hours ago
O
Manager, Software Development
OpenText
Richmond Hill, ON
- Full-time
Work with the Principal Engineer to establish standards for Java 17+, Spring Boot, Python, React/TypeScript, event-driven services, Kubernetes, PostgreSQL, and cloud platforms.
Added 8 hours ago
FG
Software Developer | Banking & Capital Markets
FDM Group
Toronto, ON
- Contract
FDM is seeking a Experienced Software Developer located in Toronto to support a project in the Banking & Capital Markets sector. Involvement in this project is anticipated to last initially…
Added 8 hours ago
T
Senior Software Developer In Test - Python Automation Engineer
Telesat
Ottawa, ON
- Contract
…across APIs, asynchronous messaging, CI/CD, containers, and Kubernetes…
Added 10 hours 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 10 hours ago
API Lead Architect
Capgemini
Mississauga, ON
Development: Java, Python, Node.js, JavaScript/TypeScript
Added 11 hours ago
C
Sanctions Developer (OFAC)
CGI
Halifax, NS
- Full-time
We are seeking a Sanctions Developer/Engineer to contribute to the enhancement and maintenance of the Client's sanctions screening platform within the OFAC compliance space.
Added 11 hours ago
L
Senior Full Stack Developer (Java/React)
Luxoft
Toronto, ON
- Contract
7+ years of experience with Java in enterprise systems
Added 11 hours ago
S
Java Software Engineer
Synechron
Calgary, AB
- Full-time
We are looking for a Java developer to join our team and help deliver key initiatives. The candidate should be a solid Java programmer, with strong design and implementation fundamentals.…
Added 11 hours ago
Systems Administrator 3 - Enterprise Observability
British Columbia Lottery Corporation
BC · Hybrid - Kamloops or Vancouver, BC
Added 12 hours ago
S
Staff Security Engineer
Snaplii
Toronto, ON · Etobicoke, ON
- Full-time
We’re hiring a Staff-level individual contributor with strong software engineering skills, deep AWS and Kubernetes security experience, and practical incident response experience. You will…
Added 13 hours ago
SI
Senior Developer
SAP IT Business Systeme
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 13 hours ago
B
Data Platform Engineer
BRP
Montreal, QC · Greater Montreal Metropolitan Area
- Full-time

Adastra Corporation

Fullstack Developer

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

Contract

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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.

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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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