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David Carbajosa TesoroDC

David Carbajosa Tesoro

Digital transformation/ DevOps/ Cloud/ Containers

€700/day
Madrid, ES
15+ years

Average response time: 1 hour

About David

I help enterprises transform how they deliver software—with deep roots in financial services.

Over 25 years, I've led DevOps and platform engineering teams at HSBC, Barclays, Citibank, and Lloyds—building platforms that remove cognitive load so teams can focus on delivering business value.

What I've delivered:
→ 8 products transformed from waterfall to agile (0% release failure rate)
→ 99.4% cycle time reduction (1 week → 1 hour)
→ 98.6% faster infrastructure provisioning (5 months → 2 days)
→ Global observability platforms processing 16M+ metric series
→ Led teams of 3-30 engineers across UK, Spain, Denmark, South Africa, US

My approach combines The Three Ways of DevOps and CALMS (Culture, Automation, Lean, Measurement, Sharing) with a relentless focus on flow optimization and eliminating waste.

Now I'm researching "The Fourth Way: Human-AI Augmentation"—exploring how agentic AI, self-healing infrastructure, and human-AI collaboration can help elite teams achieve even better DORA metrics. I'm collaborating with a PhD Professor from UNED University's NLP&IR group on cost-effective AI architectures with EU data sovereignty compliance.

See my take on flow optimization, Lean SDLC, and AI-augmented DevOps at dalimaray.io/insights

Open to: Technical Director, Head of Platform Engineering, and DevOps transformation roles
Available: Remote or hybrid, EU timezone
Nationalities: British & Spanish (dual citizenship)

Let's connect:
  • Spanish

    Native or bilingual

  • English

    Native or bilingual

  • Portuguese

    Basic

Remote only
Primarily works remotely

Experience

  • Dalimaray S.L.
    Founder & Principal Consultant
    June 2022 - Today (4 years and 1 month)
    Madrid, Spain
    Providing professional IT services to enterprise clients including Citibank. Researching "The Fourth Way: Human-AI Augmentation"—extending DevOps philosophy with agentic AI, self-healing infrastructure, and human-AI collaboration for elite teams using Generative AI agents such as Claude Code.
    • Blueprinting cost-effective AI systems in collaboration with PhD Professor from NLP&IR research group @ UNED University
    • Evaluating AI architectures including RAG systems, agentic DevOps workflows, caching strategies, human-centric feedback loops, LLM vs SLM trade-offs, and AI observability
    • Publishing thought leadership on flow optimization, Lean SDLC (queuing theory, DOWNTIME framework), DORA metrics, and CALMS at dalimaray.io/insights
    • Ensuring EU data sovereignty compliance for AI systems using European LLM providers and data residency controls
    • Providing DevOps and Platform Engineering services to enterprise clients

    Technologies: Rust, Rig, SurrealDB, Mistral (EU LLMs for data sovereignty), Kubernetes, Scaleway, Grafana Cloud
    DevOps Kubernetes Cloud Architecture Technical Leadership Platform Engineering
  • Citi
    Lead DevOps Engineer / Platform Lead
    July 2022 - October 2025 (3 years and 3 months)
    London, England, United Kingdom
    Led the platform stream (3 engineers) for Area51 Datafabric, reducing infrastructure management burden from development teams. Area51 serves critical Equities and Risk applications with extreme latency requirements.
    • Blueprinted and implemented global observability platform for Equities and Risk department, processing 16M+ active metric series with 1M+ ingestions/second globally
    • Led containerization migration of legacy Area51 Datafabric components to OpenShift private cloud using containerization techniques
    • Directed cross-datacenter migration coordination activities ensuring zero BAU disruption during critical infrastructure transitions
    • Implemented DevOps practices including IaC, cybersecurity and vulnerabilities management, semi-automated release process, and CI/CD adoption
    • Managed capacity planning including provisioning, planning, and optimization of infrastructure footprint

    Technologies used: Jenkins, Helm, OpenShift, Confluence, Java, Bitbucket, Artifactory, Maven, Gradle, Docker, Splunk, Grafana, Mimir, Go, ELK, memcached among others
    Architecture advisory Observability Cloud Migration Platform Engineering UltraLow Latency Systems
  • HSBC
    Technical Director/ Digital Transformation SME at HSBC (via Capco)
    BANKING AND INSURANCE
    January 2020 - June 2022 (2 years and 5 months)
    London, UK
    Directed DevOps Digital Transformation for Global Private Banking (GPB), reporting to Digital CIO. Led "The Platform" team (15-30 engineers) applying The Three Ways and CALMS principles.

    The platform embodied automated delivery systems, amplified feedback loops, and continuous learning—removing cognitive load so value stream teams could focus on business outcomes.

    Key achievements:
    • Blueprinted GPB DevOps strategy sponsored by Digital CIO; Final Technical Authority for DevOps Platform ecosystem
    • Onboarded 8 products from waterfall to agile:
    → 0% release failure rate
    → 98.6% faster provisioning (5 months → 2 days)
    → 99.4% cycle time reduction (1 week → 1 hour)
    → 94% release time reduction (4 hours → 16 mins)
    • Led cloud migration using Kubernetes and Istio
    • Integrated SAST, DAST, and test automation for Bank compliance

    Technologies: Istio, Jenkins, Terraform, Helm, AWS, EKS, DynamoDB, S3, AWS-KMS, AWS Secret Manager, AWS RDS, Cloudfront, Confluence, Java, Git, Nexus, Maven, Cucumber, Kubernetes, Docker, Splunk, Datadog, AppDynamics, Checkmarx, NexusIQ, Netsparker among others
    Cloud Strategy Digital Transformation DevOps Enterprise Architecture Cross-Functional Team Leadership

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Education

  • Theoretical Physics MSc
    Universidad Autónoma de Madrid
    1998

Certifications

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