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, ONWork Model: Hybrid 4-Days Onsite

Employment Type: ContractorRESPONSIBILITIES: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, Lang

Chain, Lang

Graph, and Model Context Protocol

Integrate commercial and open-source AI models into enterprise applications

Build responsive web applications using React, Type

Script, 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 solutionsQUALIFICATIONS, SKILLS & EXPERIENCE:Strong hands-on backend development experience using both Python and Java

Experience designing and developing scalable APIs, backend services, and reusable SDKsHands-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 AIHands-on experience with technologies such as Lang

Chain, Lang

Graph, and Model Context Protocol

Experience integrating commercial or open-source AI models into applications

Experience developing frontend applications using React and Type

Script

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 skillsNICE 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 applicationsABOUT ADASTRAAdastra 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 OFFEROpportunity 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 workplaceEQUAL CHANCE EMPLOYERIn 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 Docu

Sign and if you receive an employment offer from a suspicious email and not via Docu

Sign, it is fraudulent.

Contact [email protected] to inquire about jobs at Adastra, to report a suspicious request for money or personal information from external websites or suspicious employment offers.

📌 Fullstack Developer (Markham)
🏢 Adastra
📍 Markham