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Carlos Ledesma Castejón

Quality Engineering Architect · Tech Lead · AI applied to the SDLC

13+years of experience
+10countries (EU & LATAM)
LLMsapplied to QA and legacy
SDLCend-to-end perspective

Profile

Tech Lead and Quality Engineering Architect with 13+ years across the SDLC: I don't just test software — I build the frameworks, platforms and AI agents that entire teams rely on to ship with confidence. My foundation is technical (JS/TS, Python, Cloud, CI/CD) and my perspective is systemic.

I believe quality is a shared responsibility across every layer of the SDLC. I work side by side with developers, POs and stakeholders: I read the code I validate, join code reviews and translate technical risk into business decisions. A discipline I have applied across banking, IoT, consulting and large-scale digital transformation.

My edge: solid technical expertise + architectural thinking + AI tooling, walking alongside teams in their growth — because I trust my teammates' judgement and aim to enable them, not replace them.

Experience

QA & AI Solutions Architect

NTT DATA · Madrid (Hybrid)

Jun 2024 – Present

Strategic role driving tech innovation across the software lifecycle in a large-scale digital transformation context.

  • AI Agents for Quality. Design and development of autonomous LLM-powered agents for software verification, validation and quality analysis, combining testing expertise with AI tooling to reduce manual intervention in critical SDLC processes.
  • Test Case Generation. Built an AI platform for automatic test case generation, democratizing access to testing for non-technical profiles and killing the boilerplate in the design process.
  • COBOL Migration. Leading legacy COBOL modernization projects with AI-assisted pipelines for analysis, documentation and translation to maintainable languages, reducing tech debt accumulated over decades.
  • Knowledge transfer. Delivering technical courses and workshops and leading AI adoption initiatives for quality teams across Europe and LATAM, ensuring effective and sustainable rollout.
  • Cross-cutting strategy. Defining quality analysis solutions embedded in end-to-end CI/CD pipelines that guarantee maintainability, traceability and delivery efficiency at corporate scale.

QA Automation Lead / Developer

Capitole Consulting · Client: BBVA · Madrid

Feb 2021 – Jun 2024

Technical leadership on the evolution and standardization of automation frameworks for one of the largest banks in Europe.

  • Frameworks from scratch. Designed and implemented automation solutions with Selenium, Cucumber and WebdriverIO by coding the frameworks from scratch — fixtures, custom reporters, API testing helpers — and increasing coverage on critical business flows.
  • End-to-end CI/CD pipelines. Integrated the suites into end-to-end CI/CD pipelines (GitLab CI, Jenkins), enabling early bug detection and reducing the cost of fixing defects.
  • QA who speaks Dev. Joined code reviews reading the very code I was testing, and added abstraction and reporting layers that made the tests understandable to non-technical stakeholders.

Senior Full-Stack Developer

Centum Digital · Madrid

Sep 2018 – Jul 2021

Complex infrastructure development for IoT and mobile device validation at scale.

  • Microservices + AWS Device Farm. Designed and maintained a microservices-oriented infrastructure integrated with AWS Device Farm for cloud-based validation of multiple device types.
  • Multi-platform automation. Led the analysis and refactoring of testing tooling for a heterogeneous ecosystem: Smartphones, Smart TVs, STBs and WebApps.
  • Team productivity. Created efficient workflows that reduced the department operational load and improved support for platform users.

Full Stack Consultant & Web Developer

Freelance / Technology Consulting · Madrid

2013 – 2018

End-to-end projects for corporate clients and SMEs.

  • Wunderman (Land Rover). Full Stack development with CakePHP and jQuery/Bootstrap for high-traffic digital campaigns.
  • Anlddea. Architecture and prototyping of a social network for civic cooperation and SME funding (MVC, HTML5/JS).
  • Informatiz@rte. SOAP API integration and JSON data consumption for the agricultural sector.
  • Meollo. Strategic eCommerce consulting and digital presence management.

Software Engineer

Atos – DAESA · Client: BBVA · Madrid

2010 – 2013

Design and development of software for SLA monitoring, ETL processes and stock management tools for BBVA group branches.

References available on request carlosledesma.dev · Madrid, Spain