Mikel Villota

Software Engineer · Santander, Spain

Software engineer specialising in backend systems with Java and Python. I build maintainable services and APIs.

About

I started coding at 14 out of pure curiosity and haven't stopped since. I specialise in backend development with Java and Python, with a strong focus on clean architecture, microservices, and the approaches that keep services robust and scalable. I've worked across banking, fintech, consulting, and data-focused companies, on projects ranging from core banking microservices to LLM-based applications. Right now I'm learning Go and Rust, and exploring AI inference: how models actually run in production.

Work Experience

WANNMESoftware Engineer · Madrid, SpainJul 2025 – Present
- Own the Settlement Cycles domain: per-marketplace settlements plus internal management of collections and refunds, in Java and Spring Boot.
- Drove domain boundaries, contracts, and a progressive monolith-to-microservices migration alongside another engineer without disrupting production.
- Introduced CQRS on top of the team's hexagonal architecture where read/write separation earned its keep.
- Refactored legacy monolith code to unblock the extraction of ~5 modules into independently scalable services.
- Built CI/CD from scratch for new services; deployed on AWS (Elastic Beanstalk, EKS) with Kubernetes for horizontal scaling.
Company website
inAtlasFreelance, in parallelData Engineer · Barcelona, SpainMar 2025 – Aug 2025
- Designed distributed scraping pipelines with Scrapy and Playwright across 5–10 web sources, deployed on Kubernetes.
- Automated processing through asynchronous AWS SQS queues, handling large volumes of concurrent tasks.
- Built extraction, cleaning, transformation, and normalisation pipelines for structured and semi-structured data.
- Fed the outputs into search engines, recommendation systems, and analytical visualisation tools.
Company website
NTT DATASoftware Engineer · Santander, SpainSep 2024 – Jul 2025
- Built and evolved banking microservices across Python (Django) and Java (Spring) stacks.
- Designed a token-vault microservice from scratch on Redis, serving thousands of daily requests across backoffice workflows.
- Used Kafka as the backbone for event-driven architecture and as a structured log pipeline, decoupling producers from consumers.
- Modelled new tables in existing Oracle and DB2 schemas to support new use cases.
- Shipped on OpenShift with GitHub Actions CI/CD; quality gates via SonarQube and Fortify in a regulated environment.
Company website
LIS Data SolutionsSoftware Engineer · Santander, SpainSep 2023 – Sep 2024
- Worked across clients including the Regional Government of Castilla y León, a real estate developer, and an international logistics company.
- Moved to R&D and contributed to the early architecture of an in-house LLM product built with LangChain.
- Designed two proof-of-concept demos that shaped product direction: driver profitability analytics, and a SharePoint knowledge base with event-driven index consistency via content hashing.
- Built ETL pipelines (Pandas, Selenium, Scrapy) feeding analytical and AI workloads.
- Owned the full deployment cycle on Azure App Service with GitLab CI/CD.
Company website
ZarttechIntern Backend Developer · The Hague, NetherlandsMar 2023 – Sep 2023
- Sole backend developer, owning the full backend lifecycle end-to-end as a first professional experience.
- Built authentication, business services, REST endpoints, the PostgreSQL data model, and the test suite from scratch in Java and Spring Boot.
- Set up the deployment pipeline on AWS Elastic Beanstalk with GitHub Actions, leaving the backend near production-ready.
Company website

Education

Higher Education in Multiplatform Application Development

IES Augusto González de Linares · Santander, Spain

Sep 2021 – Jun 2023

Certifications

Claude Code in Action
Anthropic Education
Mar 2026
Credential ID paoiyc6f6ot5
- Anthropic Claude
- Claude Code
View credential
Project: Building Ambient Agents with LangGraph
LangChain Academy
Aug 2025
Credential ID xort5qukvk
- LangGraph
- LangChain
- Ambient Agents
View credential
C1 Advanced
Cambridge English
Mar 2025
Credential ID D0514425
- English
- C1

Courses

Wannme Hydra
Learning Heroes
Apr – Jul 2026
- AI-assisted development
- AI agents
- Spec-driven development

Activity

3,184 contributions in the last year.

@Villoh

Projects

Website Source
ytm-player
460 ★ · contributor
Open-source YouTube Music TUI client with terminal playback, playlist management, and a customisable experience.
- Python
- Textual
- mpv
Website Source
perplexity-webui-scraper
113 ★ · contributor
Scraper exposing Perplexity AI through an OpenAI-compatible REST API, MCP server, and CLI. Powers the Perplexity engine in tunnel-agent.
- Python
- FastAPI
- Playwright
- MCP
Source
tunnel-agent
24 ★
Native Windows desktop app routing local CLI agent traffic through AI provider subscriptions via a local OpenAI-compatible proxy. Supports Claude, Gemini CLI, Copilot, Codex, Perplexity, and custom providers.
- C#
- .NET 10
- Avalonia
Source
dotfiles
7 ★
Cross-platform developer environment managed with chezmoi: terminal, shell, window managers, and automated install scripts.
- chezmoi
- PowerShell
- zsh
- GlazeWM
- Hyprland
Source
holded-tt
CLI for automating time tracking on Holded. Interactive auth, 2FA, dry-run previews, and PDF/XLSX export.
- Python
- Typer
- Rich
- httpx
Source
goopdl
CLI for downloading APKs from the Google Play Store with anonymous authentication.
- Python
- protobuf
Source
masamune
Terminal UI for building Morphe artifacts from user-supplied local APKs.
- Python
- Java
- TOML
- GitHub Actions
Website
Beyond Humane
Brand co-founded with three colleagues to explore AI agent solutions. Built voice-agent MVPs with LangGraph and LiveKit, integrating ElevenLabs for synthesis and Twilio for outbound calls.
- LangGraph
- LiveKit
- ElevenLabs
- Twilio