Nikola Zjalic

Nikola Zjalic

Full Stack Developer

I'm a full-stack engineer who likes figuring out how systems fit together and making them work for real users. Day to day that's React, Angular, .NET, and Node on AWS; on my own I build whole products

Technologies

These are my go-to's — select one to see where I've used it.

Professional Experience

6y 10m

2025-08 - Current

Senior Full-Stack Developer
Bank of Montreal
  • Primary developer on a workflow tracking system integration with an in-house loan transaction service, owning full-stack development and cross-team coordination as the sole contributor for 5+ months, collaborating with senior stakeholders on architectural decisions.
  • Expanded the platform to support new deal types and workflows by navigating a complex legacy codebase with limited documentation, coordinating with offshore teams to deliver integrations across multiple third-party systems under tight deadlines.
  • Provided on-call production support, diagnosing and resolving time-sensitive issues across CloudWatch logs and SQL Developer in a high-stakes banking environment while consistently shipping features on schedule.
Angular C#/.NET Javascript Oracle DBMS AWS

2022-07 - 2025-04

Full-Stack Developer
Rocket Mortgage Canada
  • Built a unified internal SQS debugging tool that eliminated context-switching across AWS environments and dead letter queues — enabling developers to troubleshoot and re-drive messages from a single dashboard — reducing average on-call diagnosis time by ~50%.
  • Developed and deployed micro-services for third-party integrations and loan origination workflows, extending the event-driven orchestrator to support TPO flow while maintaining data reliability across a queue-based architecture using Terraform and internal deployment pipelines.
Angular Typescript C#/.NET PostgreSQL AWS Terraform

2019-10 - 2021-03

Full-Stack Developer
White Whale Analytics
  • Built custom client-facing dashboards in React to visualize AI-driven prediction model outputs, enabling clients to interpret and act on analytics data across a SaaS platform serving multiple enterprise clients.
  • Maintained 95%+ test coverage across microservices using Mocha and Jest.
React Redux Node.js Mocha Jest

2019-01 - 2019-09

Frontend Developer
Critical Mass
  • Developed interactive UI components for Blizzard Entertainment and Mazda product launches, including dynamic 3D product previews integrated within a Magento and CMS-driven e-commerce environment.
React Typescript MySQL Magento

2017-09 - 2018-12

Full-Stack Developer
Cor AI
  • Built a cloud-based cardiac rehabilitation app using HTML, CSS and JavaScript with a dynamic patient dashboard displaying biometrics and personalized health recommendations, integrated with IBM Watson to tailor content based on patient data and medical history.
HTML/CSS Node.js MySQL