Full-Stack .NET Developer
Themis Tsiligkoudis
Full-Stack .NET Developer with 5+ years of experience designing, building, and shipping production web applications. I turn business requirements into reliable software across the entire stack — from REST APIs and SQL databases to responsive front-end interfaces — with a strong focus on code quality, performance, and clean problem-solving.
Core Strengths
- Full-stack web development across front-end and back-end systems.
- Designing and consuming REST APIs, with hands-on experience in database modeling.
- Strong analytical and debugging skills — comfortable diving into legacy code.
- Customer-facing experience that translates user pain points into shipped fixes.
- Building business reports and analytics with SQL Server Reporting Services (SSRS).
- Collaborative team player with experience in Agile delivery and code reviews.
Tech Stack
Work Experience
Core member of the development team building the company's flagship education-management platform. Deliver new features and resolve production issues across both front-end and back-end on a daily basis.
- Designed and shipped new features end-to-end using ASP.NET, C#, HTML, CSS, and JavaScript.
- Investigated and resolved complex production bugs, reducing recurring incidents.
- Refactored legacy modules using modern patterns to improve maintainability and performance.
- Closed 1,300+ Azure DevOps work items, accounting for 2,000+ logged engineering hours.
Acted as the technical bridge between customers and the development team — resolving configuration issues, debugging real-world scenarios, and turning support insights into actionable backlog items and reports.
- Resolved 3,000+ customer support cases across configuration, data, and integration issues.
- Logged 2,000+ Azure DevOps cases for bugs and product backlog improvements.
- Closed 500+ engineering cases covering migrations, data fixes, and report bugs.
- Authored 400+ new SSRS reports from scratch and refined 150+ existing ones.
- Wrote 250+ T-SQL scripts to address customer issues and custom requirements.
- Strong debugging and root-cause analysis skills across complex, multi-layer systems.
- Hands-on experience integrating with third-party providers and external APIs.
Assigned to office duties leveraging my Computer Science background. Automated repetitive administrative work and supported daily IT operations.
- Improved an Excel VBA program that automatically assigned soldiers to daily duties.
- Updated a tool that automatically tracked and calculated military leave records.
- Digitised and archived soldier files, organised by year for fast retrieval.
- Conducted intake interviews with newly arrived personnel.
- Diagnosed and repaired faulty office electronics.
Started my career at Classter as a summer intern, gaining hands-on exposure to a real-world product, processes, and engineering teamwork.
- Wrote test cases and validated new features through manual software testing.
- Documented database schemas to support onboarding and feature work.
- Designed custom CSS themes for the company's main product.
- Assisted in setting up the company's new internal network infrastructure.
Education
Integrated Master's in Electrical & Computer Engineering — specialisation in Computer Software Engineering.
Final grade: 7.03 / 10