Senior Software Developer Service

Designing and building reliable, scalable software solutions with a hands-on full-stack approach, combining modern cloud architecture and Generative AI capabilities to drive innovation and growth.

Full Stack Senior Software Developer

Transforming complex business requirements into structured, scalable, production-ready software systems.
Oriol Fuertes, freelance IT consultant, coding software at a modern workstation – backend development and automation work

As a Senior Software Developer, I design and build complete software systems — from architecture to production deployment.

I support companies that need more than just implementation. I help when systems must scale, when complexity grows, or when architectural decisions have long-term business impact.

I work hands-on across backend, frontend, data architecture, and system design — always with a structured, engineering-driven approach.

What I Can Do for You

Architecture & System Design

  • Design scalable software architectures

  • Apply Domain-Driven Design (DDD) to align software with business logic

  • Implement CQRS for high-performance read/write separation

  • Build event-driven systems

  • Design microservice architectures

  • Refactor legacy systems into maintainable structures

I create systems that remain understandable, testable, and scalable over time.

Backend Development

  • Develop robust APIs and backend systems

  • Build enterprise-grade applications

  • Design and implement custom Content Management Systems

  • Handle large data volumes (financial data, device data, geolocation data)

  • Optimize performance and database architecture

  • Ensure secure and maintainable codebases

Backend systems are built with scalability and long-term stability in mind.

Frontend Development

  • Build structured Single Page Applications (SPAs)

  • Develop modern web interfaces

  • Integrate React applications into existing backend systems

  • Create Angular-based frontend frameworks

  • Connect frontend and backend through clean API contracts

The frontend is treated as part of the system architecture — not just as a visual layer.

Data-Intensive Systems

  • Design efficient data models

  • Optimize high-volume data processing

  • Build reporting and analytics layers

  • Handle real-time or near real-time data streams

  • Work with financial market data and telemetry systems

When data grows, architecture must grow with it.

Technologies & Frameworks I Have Worked With

Backend

  • ASP.NET

  • .NET Core / modern .NET

  • C#

  • REST APIs

  • SQL Server

Architecture & Patterns

  • Domain-Driven Design (DDD)

  • CQRS

  • Event-Driven Architecture

  • Microservices

  • SOLID principles

  • Clean Architecture

Frontend

  • AngularJS

  • React

  • Single Page Applications (SPA)

Data & Systems

  • High-volume financial data

  • Device and telemetry data

  • Geolocation systems

Cloud Architecture & 24/7 Operations

Building and operating secure, scalable Azure-based cloud systems designed for continuous availability.

I design, build, and maintain cloud-based systems engineered for reliability, scalability, and business continuity.

My primary cloud expertise is in Microsoft Azure, where I have designed and operated multiple production systems. In addition, I have worked with AWS (Amazon Web Services) environments and understand multi-cloud considerations.

Cloud architecture is not just about deploying applications. It is about building infrastructures that operate securely, scale under load, and remain stable 24/7.

Microsoft Azure Cloud Architecture

Most of my cloud projects have been built on Microsoft Azure.

I design Azure-based infrastructures that:

  • Scale horizontally and vertically

  • Ensure high availability and redundancy

  • Support distributed and microservice systems

  • Integrate monitoring, logging, and alerting

  • Separate development, staging, and production environments

My work includes:

  • Architecture planning

  • Resource structuring

  • Service configuration

  • Secure network design

  • Performance optimization

Azure environments are designed with long-term stability and operational clarity in mind.

Infrastructure Setup & Deployment

I have built and deployed multiple cloud-based systems from the ground up, including:

  • Infrastructure planning and implementation

  • Environment configuration

  • Secure deployment processes

  • Production-ready rollouts

Each system is structured to ensure stability, transparency, and maintainability.

24/7 Operations & Reliability

Reliable operation is part of the architecture — not an afterthought.

I have maintained production systems with continuous availability requirements, including:

  • Monitoring and performance tracking

  • Incident handling and troubleshooting

  • Resource optimization

  • Capacity planning and scaling strategies

The goal is proactive reliability and long-term operational stability.

Business Continuity & External Service Coordination

Cloud systems often depend on external providers.

I have:

  • Evaluated and selected infrastructure vendors

  • Negotiated and coordinated external service partners

  • Defined service-level expectations

  • Designed fallback and disaster recovery strategies

Technical infrastructure must support business continuity and reduce operational risk.

https://fuertes-it.com/wp-content/uploads/Cloud-Architecture-24-7-Operations.png

What You Get

When working with me in the area of Cloud Architecture, you gain:

  • Strong Azure expertise with AWS experience

  • Structured and scalable infrastructure design

  • A technically experienced architect who understands operational realities

  • Clear, reliable production systems designed for long-term stability

Cloud systems must empower your business — not become a source of uncertainty.

Generative AI Integration & Enablement

From experimentation to enterprise integration — Generative AI that actually works.
Oriol Fuertes working with AI dashboards and generative AI solutions for business digital transformation

Artificial Intelligence is not a toy. It is a productivity amplifier — when implemented correctly.

I support companies in integrating Generative AI into their real business processes, not as an experiment, but as a structured, value-driven capability.

With hands-on experience using the ChatGPT API and other large language models, I design and implement AI-powered systems that integrate directly into existing software architectures, production environments, and business workflows.

One of my flagship concepts, “Talk to the Factory”, focused on integrating Generative AI directly into shopfloor environments — enabling employees to interact with production data, documentation, and systems using natural language. The goal was simple: reduce complexity, increase accessibility, and accelerate decision-making on the production floor.

Beyond system integration, I also enable organizations at a human level. I have designed and delivered structured training sessions to help teams understand and effectively use tools like ChatGPT in their daily work — increasing productivity while maintaining security and compliance standards.

My experience includes working with:

  • ChatGPT API (OpenAI)

  • Gemini

  • Prompt engineering and structured AI workflows

  • AI integration into backend systems and enterprise applications

  • AI enablement workshops for teams and organizations

I am currently expanding this expertise further and look forward to integrating additional large language models such as Claude into future enterprise projects.

Generative AI is powerful — but only when combined with solid architecture, clear processes, and real business understanding. That is exactly where I position my work.