Senior Java Developer (with LLM expertise)

- Full time

Miratech helps visionaries change the world. We are a global IT services and consulting company that brings together enterprise and start-up innovation. Today, we support digital transformation for some of the world's largest enterprises. By partnering with both large and small players, we stay at the leading edge of technology, remain nimble even as a global leader, and create technology that helps our clients further enhance their business. We are a values-drivenorganizationand our culture of Relentless Performance has enabled over 99% ofMiratech'sengagements to succeed by meeting or exceeding our scope, schedule, and/or budgetobjectivessince ourinceptionin 1989.
Miratech has coverage across 5 continents andoperatesin over 25 countries around the world. Miratech retainsnearly 1000full-time professionals, and our annual growth rate exceeds 25%.

We are looking for a Senior Java Developer with LLM expertise to lead the technical design, development and integration of core banking application systems for a major financial services client.

This role bridges high-scale microservices architecture with GenAI. You will help the bank build scalable, resilient, API-driven ecosystems that embed LLMs, agentic workflows, and intelligent automation into business processes. Day-to-day, you will implement solutions designed by the architecture team in Java and Spring Boot, build LLM-powered and agentic features, and shape how the wider developer group adopts AI-assisted engineering.

Working Model: This is a hybrid role requiring 2 days per week in a downtown Toronto office.

Responsibilities:

- Lead the design and delivery of Java/Spring Boot microservices,



establishing API-first design principles, service-to-service communication and secure integration patterns.
- Implement solutions designed by architects, turning target designs into production-ready, well-tested services.
- Identify, prototype and build automation using AI technologies, and architect backend systems that support LLM integration, Retrieval-Augmented Generation (RAG) and vector databases.
- Build agentic workflows and design, test and refine prompts for LLM-powered features.
- Design event-driven workflows using streaming platforms such as Kafka.
- Ensure solutions fit containerized, cloud-native deployments on Docker, Kubernetes/OpenShift or Azure, delivered through CI/CD pipelines.
- Drive formal design reviews, contribute to technology stack selection, and define caching and observability strategies.
- Manage application security, including OAuth2/JWT authentication and authorization.
- Promote AI-assisted engineering across the developer group, including prompt engineering and the practical adoption of GitHub Copilot to speed up software delivery.

- 7+ years of experience designing and implementing large-scale enterprise applications.
- Deep expertise in Java, Spring Boot, RESTful APIs and gRPC services.
- Strong proficiency in Python, prompt patterns,



LLM orchestration frameworks such as LangChain or LlamaIndex, and working with vector databases.
- Hands-on experience with Kafka, RDBMS/SQL, NoSQL and high-performance caching architectures.
- Experience with CI/CD pipelines (Jenkins, GitHub Actions), Docker/Podman, OpenShift/Kubernetes and cloud platforms.
- Solid understanding of application security, including OAuth2 and JWT.
- Bachelor's degree in Computer Science, Software Engineering, Information Technology or a related field, or equivalent practical experience.

Nice to have:

- Experience in banking, financial services or another regulated industry.
- Experience with production GenAI solutions, multiple LLM providers, LLM evaluation and agentic workflows.
- Familiarity with AI governance, model risk management, privacy controls and responsible AI practices.
- Experience with Redis, messaging and streaming services, and Infrastructure as Code.
- Experience with security testing, DevSecOps, Agile/Scrum and GitHub Copilot.
- Experience mentoring developers and contributing to architecture standards, technical governance and engineering strategy.

We offer:

- Culture of Relentless Performance:join an unstoppable technology development team with a 99% project success rate and more than 30% year-over-year revenue growth.
- Competitive Pay and Benefits:enjoy a comprehensive compensation and benefits package, including health insurance, and a relocation program.
- Work From Anywhere Culture:make the most of the flexibility that comes with remote work.
- Growth Mindset: reap the benefits of a range of professional development opportunities, including ce

📌 Senior Java Developer (Toronto)
🏢 Miratech
📍 Toronto