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Full-stack software developer with experience building and optimizing web applications and SaaS platforms across .NET (ASP.NET Core, ASP.NET), React, TypeScript/Node.js, and SQL Server on Azure DevOps. I’ve contributed to enterprise-grade authentication and authorization flows, dynamic reusable UI components, performance tuning for critical third-party integrations, and production incident resolution at scale. I also developed and owned a RAG-assisted agentic AI workflow for an in-house AI assistant using Microsoft Foundry, focusing on guardrails, query intent handling, and system telemetry. I enjoy translating product requirements into complete technical solutions, improving CI/CD and automation, and collaborating closely with product and customer success teams.…Full-stack software developer with experience building and optimizing web applications and SaaS platforms across .NET (ASP.NET Core, ASP.NET), React, TypeScript/Node.js, and SQL Server on Azure DevOps. I’ve contributed to enterprise-grade authentication and authorization flows, dynamic reusable UI components, performance tuning for critical third-party integrations, and production incident resolution at scale. I also developed and owned a RAG-assisted agentic AI workflow for an in-house AI assistant using Microsoft Foundry, focusing on guardrails, query intent handling, and system telemetry. I enjoy translating product requirements into complete technical solutions, improving CI/CD and automation, and collaborating closely with product and customer success teams.

Sebastian Suen

Full Stack Developer, Web Developer, Programmer, +4

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Full-stack software developer with experience building and optimizing web applications and SaaS platforms across .NET (ASP.NET Core, ASP.NET), React, TypeScript/Node.js, and SQL Server on Azure DevOps. I’ve contributed to enterprise-grade authentication and authorization flows, dynamic reusable UI components, performance tuning for critical third-party integrations, and production incident resolution at scale. I also developed and owned a RAG-assisted agentic AI workflow for an in-house AI assistant using Microsoft Foundry, focusing on guardrails, query intent handling, and system telemetry. I enjoy translating product requirements into complete technical solutions, improving CI/CD and automation, and collaborating closely with product and customer success teams.…Full-stack software developer with experience building and optimizing web applications and SaaS platforms across .NET (ASP.NET Core, ASP.NET), React, TypeScript/Node.js, and SQL Server on Azure DevOps. I’ve contributed to enterprise-grade authentication and authorization flows, dynamic reusable UI components, performance tuning for critical third-party integrations, and production incident resolution at scale. I also developed and owned a RAG-assisted agentic AI workflow for an in-house AI assistant using Microsoft Foundry, focusing on guardrails, query intent handling, and system telemetry. I enjoy translating product requirements into complete technical solutions, improving CI/CD and automation, and collaborating closely with product and customer success teams.

Available to hire

Full-stack software developer with experience building and optimizing web applications and SaaS platforms across .NET (ASP.NET Core, ASP.NET), React, TypeScript/Node.js, and SQL Server on Azure DevOps. I’ve contributed to enterprise-grade authentication and authorization flows, dynamic reusable UI components, performance tuning for critical third-party integrations, and production incident resolution at scale.

I also developed and owned a RAG-assisted agentic AI workflow for an in-house AI assistant using Microsoft Foundry, focusing on guardrails, query intent handling, and system telemetry. I enjoy translating product requirements into complete technical solutions, improving CI/CD and automation, and collaborating closely with product and customer success teams.

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Work Experience

Software Developer at Property Control

June 1, 2025 - August 31, 2026

Full stack development of a residential property management SaaS platform using C#, .NET Core, ASP.NET, React, TypeScript, Node.js, NestJS, Tanstack, SQL Server, and Azure DevOps. Served as a primary contributor to a greenfield enterprise module, implementing full-stack authorization flows, backend validation, and dynamic reusable UI components. Owned research and implementation of a RAG-assisted agentic AI workflow on Microsoft Foundry for an in-house AI assistant, with a focus on guardrails, query intent, and system telemetry. Optimized critical third-party data integrations and database queries to improve synchronization performance and reduce latency. Diagnosed and resolved high-priority production incidents by tracing defects to root cause and implementing long-term fixes.

Software Engineer at Communify Fincentric (formerly part of S&P Global)

December 1, 2021 - June 30, 2025

Full stack development of web applications for investment banks and financial institutions in an Agile environment using C#/.NET, Vue, Node.js, React, and SQL. Spearheaded an in-house feature flagging API to enable transitioning deployments to a full CI/CD pipeline. Authored unit testing and end-to-end testing suites to reduce manual QA effort and decrease post-deployment bugs. Mentored teammates through brown bags, supported onboarding, wrote technical documentation, and presented work during sprint demos.

Sales and Service Engineer at Yuh Dak North America Inc

March 1, 2018 - December 31, 2021

Provided phone and email support for customer troubleshooting and resolution. Performed repairs, installations, upgrades, modifications, and servicing on-site for customer machines.

Technical Consultant at FIS

June 30, 2016 - February 27, 2018

* Developed customizations, changes, new features, and bug fixes for system upgrades, new implementations, major releases, and BAU for client-specific implementations of proprietary credit and market risk software. * Drafted and published technical design specifications and project definition statements based on client requirements. * Performed manual QA and supported clients during user acceptance testing (UAT).

Software Support Engineer at Tata Consultancy Services

May 29, 2015 - June 27, 2016

* Completed a six-week training period culminating in development of a retail management web application in an Agile environment. * Provided production support for ecommerce and value-added service API systems for a major Canadian telecommunications company. * Built utilities using Java and Unix shell scripts to automate system maintenance tasks, reducing alert frequency and improving ticket resolution time. * Coordinated with external clients and vendors regarding ongoing issues and upcoming business events.