Santiago Ospina Arango

Junior Software Developer | C# · .NET · Angular · Azure · SQL Server
Building resilient full-stack systems, cloud integrations, and enterprise AI-driven automation.

Medellín, Colombia  ·  LinkedIn  ·  tuwebdebolsillo.com  ·  santiagoospinadev@gmail.com

I am a Junior Software Developer and Software Development Technology student at Instituto Tecnológico Metropolitano (ITM), graduating in December 2026.

I have practical enterprise experience designing, developing, and deploying full-stack architectures, cloud backends, database optimizations, and intelligent automation pipelines. My core stack centers on C# / .NET, Angular, SQL Server, and the Microsoft Azure ecosystem (Azure Functions, Azure DevOps REST API, Azure Boards, and Azure Test Plans).

In enterprise settings, I have engineered AI-assisted tools that automate user story generation, detect requirements ambiguities, and construct traceability matrices and test suites—directly shortening delivery cycles for multidisciplinary teams.

My technical capabilities are structured around production reliability, clean code principles, and cloud-native workflows:

Medellín, Colombia | Feb. 2026 – Aug. 2026

• End-to-End Enterprise AI Platform: Architected and deployed a full-stack platform using Angular 19, .NET Azure Functions, and the Azure DevOps REST API to automatically generate, refine, and provision epics, features, user stories, and test suites with AI.
  Impact: Adopted as a recurring operational tool by 40+ technical and functional users.
• Agile Backlog & QA Acceleration: Integrated the tool directly with Service Desk, Azure Boards, and Azure Test Plans, linking work items to functional requirement suites.
  Impact: Reduced story documentation and QA preparation time by ~50% for SAP implementation analysts.
• Requirements Risk & Ambiguity Engine: Engineered a rule and AI engine analyzing user stories prior to sprint commitment to flag ambiguities, technical dependencies, edge cases, and architectural risks.
• High-Velocity Workflow Integration (n8n + Azure): Developed high-throughput Azure endpoints connecting external n8n automation pipelines into Azure DevOps.
  Impact: Enabled the generation and linking of 100+ structured work items in under 5 minutes, reducing initial backlog planning time by ~70%.
• Database & Stored Procedure Optimization: Diagnosed and tuned heavy SQL Server stored procedures and query execution plans supporting OMS and SDI business flows.
  Impact: Reduced query execution and data loading times by 40% – 50%.
• AI Talent Assessment Portal: Developed a web application for a university Open Day that ingested and evaluated resumes with AI using Harvard and corporate evaluation criteria.
• Service Desk Background Automation: Implemented background scheduled tasks, SLA tracking routines, and automated alert workflows in .NET and SQL Server.

Confidentiality Notice: In compliance with corporate non-disclosure agreements, enterprise source code, internal endpoints, and private corporate databases are strictly excluded from this profile. Public repositories demonstrate technical competencies through independent, open-source implementations.

A curated selection of production-grade architectures, enterprise monorepos, and developer utilities:

Retro-pixel desktop control plane and telemetry monitor for OpenAI Codex and OmniRoute on Windows.

• Architecture: Node.js server engine paired with lightweight single-file vanilla UI, Windows VBS launchers, and surgical TOML engine.
• Engineering Highlights: Custom AST-preserving TOML parser, multi-process lifecycle supervision, telemetry streaming, atomic disk writes, rolling backups, and automated Playwright E2E suites.
• Stack: JavaScript, Node.js, HTML5/CSS3, Playwright, Windows PowerShell.

Clean Architecture backend and standalone Angular frontend managing residential customer lifecycles.

• Architecture: Strict domain-driven separation (DataGo.Domain, DataGo.Application, DataGo.Infrastructure, DataGo.Api). Business logic remains decoupled from HTTP transport and persistence layers.
• Engineering Highlights: Version-controlled PostgreSQL stored procedures, EF Core 10, Npgsql routines, Angular 21 standalone components with Reactive Forms, and xUnit test suites.
• Stack: C# 14, .NET 10, EF Core, PostgreSQL (Neon), Angular 21, xUnit, Swagger / OpenAPI.

Clean Architecture e-commerce post-sales and warranties engine with role-based Angular portal.

• Architecture: Hexagonal architecture implementing 5 GoF design patterns (State, Strategy, Observer, Builder, Facade).
• Engineering Highlights: Supabase PostgreSQL & Storage integration for photographic claims, JWT RBAC route guards for Clients, Analysts, and Suppliers.
• Stack: .NET 8 Web API, C#, Entity Framework Core, Supabase, Angular 20 Standalone, Reactive Forms.

Commercial digital platform engineered for high-performance responsive web presence.

• Architecture: Islands architecture with Astro and React 19 partial hydration, Cal.com live booking integration, and Motion animations.
• Engineering Highlights: Achieved 100/100 Core Web Vitals across all Lighthouse metrics and an initial LCP under 0.3s.
• Stack: Astro, React 19, TypeScript, Motion v12, Cal.com API, Cloudflare Pages.

In-browser client-side video processing utility designed for NotebookLM duration and payload constraints.

• Architecture: 100% client-side execution utilizing WebAssembly-compiled FFmpeg (@ffmpeg/ffmpeg).
• Engineering Highlights: Zero server uploads—processes high-definition video chunks and compact M4A audio extractions directly inside browser memory with live progress tracking.
• Stack: JavaScript, FFmpeg WebAssembly, Web Workers, HTML5 File API.

Enterprise supermarket inventory, billing, and supplier management SPA.

• Architecture: Angular 20 standalone client consuming FastAPI RESTful services via JWT Bearer authentication.
• Engineering Highlights: Reactive signal-based state management, Angular Material components, protected routing guards, and live production deployment.
• Stack: Angular 20, Angular Material, TypeScript, FastAPI, Signals.

The banner at the top of this profile is not a static stock graphic. It is generated by a custom Python procedural engine that interprets Katsushika Hokusai's The Great Wave off Kanagawa into 26,624 addressable Braille dot positions (U+2800..U+28FF).

┌── GENERATIVE ENGINE SPECIFICATION ──────────────────────────────────────┐
│  GEOMETRY    : Cubic Bézier wave crest, curling lip & underside barrel  │
│  HARMONICS   : Continuous trigonometric phase breathing (T = 6.0s)      │
│  DYNAMICS    : 20 articulating foam claws + 95 ballistic spray droplets │
│  CONTINUITY  : Mathematically verified infinite loop (Δ = 0px jump)     │
│  CODEBASE    : scripts/banner/ (Python 3.14 · Pillow · NumPy)           │
└─────────────────────────────────────────────────────────────────────────┘

You can inspect the generator code, customize themes, or execute test suites directly from this repository:

• Architecture & Design Decisions: docs/DESIGN_DECISIONS.md
• Technical Research & References: docs/research/README_VISUAL_RESEARCH.md
• Local Reproduction Guide (Windows 11): docs/BANNER_GENERATION.md
• Automated Test Suite: tests/test_banner.py

# Regenerate banners locally on Windows 11
python -m scripts.banner.generate

I am open to junior software development positions, backend / full-stack engineering roles, and cloud automation projects:

_{© 2026 Santiago Ospina Arango · Crafted with Python, SVG, and Braille Generative Art.}