Senior Full-Stack .NET Engineer

Senior full-stack .NET engineering for teams building critical products.

I help product and platform teams build, modernize, and operate reliable applications, APIs, RAG knowledge systems, and internal platforms.

Open to full-time opportunities
Leonardo Apollonio
Preferred setupRemote or hybrid · Full-time
8+Years building software
Years building software8+
OpportunityFull-time roles
Based inBuenos Aires
CitizenshipArgentina + Italy

Sector experience Enterprise · Maritime · Media · Banking · Web platforms

How I contribute

Senior engineering inside your team.

I can strengthen an established team, own a product area, and help turn complex requirements into dependable software.

01

Business applications

Internal tools, workflows, reporting, and operational platforms tailored to how your team actually works.

02

APIs, RAG & integrations

Reliable REST APIs, system integrations, and RAG knowledge solutions with .NET, Semantic Kernel, embeddings, vector search, and maintainable document pipelines.

03

Legacy modernization

Incremental upgrades for .NET systems that reduce risk while improving performance, security, and developer velocity.

04

Full-stack delivery

End-to-end implementation with .NET, Angular or React—from data and backend logic to accessible front-end experiences.

05

AI automation & agents

Context-aware business automation with AI agents and LLMs, prompt engineering, retrieval, and structured inputs for clearer resource and process information.

.NET CoreASP.NET MVCC#AI AutomationAI Agents / LLMsPrompt EngineeringContext-aware TextSemantic KernelRAGVector SearchAngularReactTypeScriptAzureAWSPostgreSQLSQL ServerGKEOpenShift
Selected experience

Systems built for real operations.

Experience across enterprise operations, maritime logistics, media, banking, and web platforms.

01Confidential enterprise client

Enterprise operations platform

Full-stack delivery of modules and reliability improvements for a private platform that centralizes operational workflows and business data.

Full-stackEnterpriseCloud
02Inchcape Shipping Services

Real-time maritime tracking

Full-stack development for a system covering live ship tracking plus port and terminal information.

.NETPostgreSQLAWS
03Globant

Subscription & user APIs

Maintenance and creation of APIs managing subscriptions, newsletters, and user information for a major media group.

.NET CoreREST APIsGKE
04ITProviders · Banco Galicia

Digital banking workflows

New modules, maintenance, and a file conversion and validation service for business banking payment products.

.NET CoreOpenShiftJavaScript
05Business automation

Context-aware resource & process automation

Built a business AI automation that organizes resource availability and company processes, then generates accurate descriptions from the relevant context.

AI AutomationAI Agents / LLMsPrompt EngineeringContext-aware Text
Career

Eight years of hands-on delivery.

01

International energy company

Full Stack .NET Developer

Full-stack .NET development
02

Inchcape Shipping Services

Full Stack .NET Developer

Maritime technology
03

Globant

Back End .NET Developer

APIs for digital media
04

ITProviders · Banco Galicia

Full Stack .NET Developer

Digital payments
05

Epidata

Full Stack .NET Developer

Enterprise web systems
Public code

Original engineering demos built to show production-minded decisions.

View GitHub profile
PUBLICorderflow-api

OrderFlow API

Enterprise-style API with explicit workflows, idempotency, concurrency control, health checks, automated tests, and CI.

.NET 10 · ASP.NET Core · Tests · Docker
PUBLICops-dashboard

Ops Dashboard

Angular client for OrderFlow API with idempotent creation, state-safe actions, runtime configuration, honest offline fallback, tests, and CI.

Angular 22 · TypeScript · Accessibility · Tests
PUBLIClaunchboard

LaunchBoard

Release-readiness console that turns technical checks and blockers into a clear, interactive go/no-go decision.

React 19 · TypeScript · Accessibility · Tests
Interactive demonstrations

See the product thinking behind the code.

Four interactive products translate engineering work into clear business workflows. The Angular client follows the real .NET API contract, and every sample or offline state is clearly labelled.

Demo 01

OrderFlow Operations Console

Create an order, retry it safely without duplicates, and move it through a visible processing lifecycle.

.NET API concepts · Idempotency · Workflow states
Demo 02

Ops Command Center

Create and replay orders safely, then run only the state transitions allowed by the real OrderFlow API contract.

Angular 22 · HttpClient · .NET API contract
Demo 03

LaunchBoard

Review releases, complete launch checks, resolve blockers, and watch the readiness decision recalculate instantly.

React 19 · TypeScript · Accessible product UI
Demo 04

Context-aware Automation Console

Select relevant resource and process context, then generate a clear availability and workflow brief scoped to that context.

AI automation · LLM context · Prompt engineering
Education & credentials

Grounded in fundamentals, always learning.

Associate Degree in Computer Programming

Universidad Tecnológica Nacional · Grade 8.71

Angular & SAFe 6 Practitioner

Coderhouse · Scaled Agile

React JS & English studies

Coderhouse · Centro Universitario de Idiomas · Current level: Fluent

Building a stronger engineering team?

Let’s talk about the role.

If you’re hiring a senior full-stack .NET engineer, I’d be glad to learn about the team, product, and challenges ahead.