Full stack developer Jobs in East York, ON

Our client, a leading financial institution, is seeking a Senior Full Stack Developer specializing in Financial Systems to join their team. In this role, you will build and maintain mission-critical applications across a diverse technology stack, including Angular UIs, Java REST APIs, relational databases, and Python data pipelines. The work spans the greenfield modernization of legacy applications and active feature development on existing enterprise platforms.

This position operates on a hybrid schedule out of Toronto, ON or Montreal, QC office locations.

Contract Duration: June 15, 2026 – December 31, 2026

Potential for Extension: No

Language Requirements: English (Bilingual English/French is an asset)

Advantages
Cutting-Edge Stack: Work with modern frameworks including Angular 14+, Java 17/21, Python 3.10+, and AWS cloud infrastructure.

Innovative Environment: Experience a highly structured "spec-driven" development workflow that successfully pairs human governance with advanced AI-assisted coding tools.

Complex Financial Mandates: Gain deep exposure to complex architectural designs across modernizations and greenfield financial applications.

Responsibilities
Full-Stack Development: Build robust frontend features using Angular and develop high-performance backend JSON REST APIs using Java (Spring Boot) with proper HTTP semantics and error handling.

Data Pipelines & Scripting: Write clean, optimized Python scripts for data transformation, API development, and handle notebook-based development alongside Spark job orchestration.

Cloud & Database Optimization: Deploy and operate enterprise workloads across core AWS services; write highly optimized SQL queries, read/debug stored procedures, and analyze execution plans.

Quality & Governance: Adhere to strict code quality gates, including enforced Pull Request (PR) reviews and Acceptance Test–Driven Development (ATDD) practices.

Collaborative Spec-driven Workflows: Follow structured proposal/spec/task workflows before implementation, ensuring high traceability, security, and correctness.

Qualifications
Required Skills & Experience
3-5 years of professional experience working with modern, full-stack application development ecosystems.

Frontend UI (3+ Years): Hands-on experience with Angular (v14+), TypeScript, Reactive Forms, RxJS, Angular Material, and responsive layouts.

Backend Engineering (3+ Years): Enterprise development experience with Java (11+, ideally 17 or 21 LTS) and REST API frameworks (Spring Boot or JAX-RS/Jersey) utilizing Maven for builds.

Python & Data Engineering: Proficiency in Python 3.10+ for data transformation, scripting, and familiarity with notebook-based development or Spark orchestration.

Cloud Infrastructure: Practical working knowledge of core AWS services (S3, Lambda, RDS, ECS, IAM, Glue, or equivalent cloud infrastructure tools).

Databases: Strong SQL capability with relational engines like Oracle (PL/SQL) and/or SQL Server (T-SQL), including a deep understanding of execution plans and JDBC data access patterns.

Core Practices: Mastery of Git (branching, PRs, code reviews), writing thorough unit/integration tests, and operating inside Docker/containerized environments.

Preferred Skills (Nice-to-Have)
AI/ML Tooling: Experience with FastAPI, RAG pipelines, Azure OpenAI, ChromaDB, or leveraging AI-assisted coding tools (e.g., GitHub Copilot).

Advanced Angular & Testing: Experience with Signals, Standalone APIs, Material 3, and automated testing frameworks like Playwright or TestNG.

Domain Knowledge: Prior exposure to Reinsurance systems, fixed-income securities, loan amortization, or AP/AR subledgers.

Summary
We are looking for a technically rigorous, curious developer who takes pride in writing clean, well-tested code across multiple architectural layers. If you thrive in highly managed, modern engineering environments and have a strong command of Angular, Java, Python, and SQL, apply today to connect with our recruiting team!

Randstad Canada is committed to fostering a workforce reflective of all peoples of Canada. As a result, we are committed to developing and implementing strategies to increase the equity, diversity and inclusion within the workplace by examining our internal policies, practices, and systems throughout the entire lifecycle of our workforce, including its recruitment, retention and advancement for all employees. In addition to our deep commitment to respecting human rights, we are dedicated to positive actions to affect change to ensure everyone has full participation in the workforce free from any barriers, systemic or otherwise, especially equity-seeking groups who are usually underrepresented in Canada's workforce, including those who identify as women or non-binary/gender non-conforming; Indigenous or Aboriginal Peoples; persons with disabilities (visible or invisible) and; members of visible minorities, racialized groups and the LGBTQ2+ community.

Randstad Canada is committed to creating and maintaining an inclusive and accessible workplace for all its candidates and employees by supporting their accessibility and accommodation needs throughout the employment lifecycle. We ask that all job applications please identify any accommodation requirements by sending an email to accessibility@randstad.ca to ensure their ability to fully participate in the interview process.