
Jose M. Valera Reales
Tech Lead · Construyendo software, equipos e ideas · chemaclass.com
Berlin, Germany
Sobre mí
15+ años construyendo software. 5+ años liderando equipos. Sigo escribiendo código a diario.
Me especializo en arquitectura de software por capas y monolitos modulares. Sistemas diseñados para durar sin pelear consigo mismos. TDD y SOLID no son reglas que sigo; son mi forma de pensar.
Gran parte de mi trabajo involucra agentes de IA. Los trato como un equipo de especialistas: cada uno con un rol claro, restricciones definidas y estándares de calidad que no ceden ante los deadlines. La misma disciplina que aplico a equipos humanos, la aplico a los de IA.
El mejor código es a menudo el que no escribes. Los mejores equipos son aquellos donde la seguridad psicológica hace a todos más eficaces. Me importan ambos.
"Chema está muy por delante de la curva en IA. Mientras la mayoría de equipos aún debaten por dónde empezar, Chema ya tiene múltiples agentes corriendo en producción."
Experiencia
Purpose Green
Berlin, Germany · 1 año 11 meses
Tech Lead
Mar 2025 – Jun 2026Lideré la migración de la API Laravel a monolito modular con límites DDD: módulos de dominio independientes que escalan entre equipos sin acoplamiento cruzado. Player-coach: código en producción a diario mientras hago crecer al equipo con mentoría, katas mensuales y prácticas XP (ownership, maestría, propósito). Sistemas backend apoyando la misión de descarbonizar cada edificio europeo.
Software Developer
Aug 2024 – Mar 2025Ingeniero backend senior. Integración del sistema de pagos con Stripe. Promoción de valores, principios y prácticas de Extreme Programming. Code katas mensuales, enfoque en excelencia individual y de equipo.
ABOUT YOU
Berlin, Germany · Remote · 1 año
Head of Engineering
Aug 2023 – Jul 2024Head of Engineering supervisando 3 equipos (12 ingenieros): DevOps, integraciones de APIs externas e internas. Lideré el equipo SDK entregando una nueva API de pagos. Impulsé Extreme Programming: pair programming, TDD, code katas. Mentoría y coaching cross-team, entrevistas y contratación.
Lautsprecher Teufel
Berlin, Germany · 3 años 2 meses
Tech Lead
Jul 2021 – Jul 2023Lead del equipo Web-IT (6 ingenieros) responsable del Webshop. Coaching de desarrolladores en su camino al siguiente nivel, cultivando una cultura de ownership, customer centricity, maestría y propósito.
Software Developer
Jun 2020 – Jul 2021Responsable del desarrollo del Webshop en diferentes países. Promoción de Extreme Programming con Pair-Programming y TDD.
Seven Senders
Berlin, Germany · 2 años 9 meses
Software Developer
Sep 2017 – May 2020Parte del equipo interno de Analytics (5 ingenieros), enfocado en el servicio API backend para la solución de seguimiento de paquetes.
Move24
Berlin, Germany · 7 meses
Software Developer
Jan 2017 – Jul 2017Responsable de la homepage y búsqueda.
Webgears
Berlin, Germany · 1 año 4 meses
Software Developer
Sep 2015 – Dec 2016Backend de la aplicación web y herramientas internas.
Falk medizinische Datenverarbeitung
Lübeck, Alemania · 9 meses
Software Developer
Dec 2014 – Aug 2015Desarrollo de la aplicación web para la aplicación médica de escritorio.
LEVERADE
Murcia, Spain · 8 meses
Software Developer
Jan 2014 – Aug 2014Desarrollador full stack, parte del equipo de desarrollo de la aplicación web.
Tecnoavanza
Murcia, Spain · 4 meses
Software Developer Prácticas
Mar 2013 – Jun 2013Desarrollo de software para plataformas móviles. Primer contacto con Symfony en entorno profesional.
Recomendaciones
"I worked with Chema for almost two years at Purpose Green. We started together as Senior Backend Engineers, and he later became our Team Tech Lead. Chema is one of the most professional leaders and colleagues I have ever worked with.
He has solid experience in PHP and team management, but what I appreciated most was how supportive he was. He was always there to help the team and made sure we had everything we needed to succeed. He is a great leader and a great person."
"Chema is the best team lead I have ever worked with. He has a real talent for motivating the whole team to grow, try new things, and stay curious about modern tools and ideas.
For him, collaboration and communication are the key to everything. He builds an environment where people feel safe to share ideas, ask questions, and learn from each other. You can feel that he really cares about the team, not only about the results.
Chema also led our integration of AI tools and helped the whole team fall in love with agentic coding. He shared patterns, ran sessions, and showed us how to use these tools in a smart and structured way — not as hype, but as a real part of how we ship software.
Any team that gets Chema as a lead is very lucky. He makes people around him better engineers and better teammates."
"I've worked with Chema twice, first at Seven Senders (2017-2019), and again at Purpose Green as my counterpart on the tech side.
What makes Chema rare is that he doesn't hide behind roadmaps or architecture diagrams. He gets into the details when it matters and refuses to use process as an excuse to slow things down. Agile isn't a methodology to him, it's how he works, which makes him unusually easy to build with from a product seat.
He's also well ahead of the curve on AI. While most teams are still debating where to start, Chema already has multiple agents running in production.
If you want a tech lead who pairs sharp engineering instincts with a real appetite for what's next, Chema is the one."
"Chema is a great engineer and knows how to create value from get go. He was proactive, resourceful, and knew how to navigate extreme complexity, demonstrating clear leadership skills. He not only adhered to agile principles, but also lifted his co-workers by coaching them."
"Chema is a great leader, speaker, and impactful contributor! He always balances clean code, testing, and software design with pragmatism while delivering value to the customer. With a truly agile mindset, he is capable of helping your tech organization reach the next level."
"Chema is an impressive person to work with and to be inspired by. His coding skills were already outstanding when I hired him, principles like SOLID or approaches like TDD were mastered and embraced by heart already. This turned out to even be surpassed by his incredible learning mindset. One of a kind, a perfect addition to any a-team."
"Working with Chema for the last three years was a powerful experience. Driven by curiosity he always challenged himself, me and the team. Trying new ways and improving long existing processes was a daily manner for him. I know his new team will be in good hands!"
"Chema is a highly motivated and capable developer with a keen eye for detail and is always striving to improve himself, the projects he works on and the colleagues he works with. He drives change when it's needed, is a keen collaborator and a delight to work with."
"Chema has a great passion for testing and refactoring. He is easy to approach, always ready to help and listen, very patient and nice. He is also happy to be your rubber duck when you want to practice a talk or a coding demo. If you feel tired or stressed, Chema makes you see the fun side of coding again."
"He was the 'Tony Stark' of our team. He is smart, reliable, and best known for building flawless solutions."
"When he decided to leave, I knew it'll be a big loss for the team since he's been always keen on delivering quality work, learning, adapting and teaching others, maintaining a proper test suite, and delivering on time. Very good guy ;)"
"Working with Jose is a pleasure not only in technical side but also in every-day life. Cheerful, open, convivial person. Knows and follows modern best practices, understands the pillars of Software development."
"Whoever hires Jose will not only get a programmer with strong technical skills, but also a great colleague with good sense of humor and great interpersonal skills. What impressed me the most was his enthusiasm to improve himself."
"He is a very valuable member of the team with strong passion for work and a really hands-on 'get things done' approach. He writes very clean code, effectively applies best practices, can dig into very complex problems and simplify them."
"José always produced top-line quality work. He worked well with all the other developers, and carried out his responsibilities efficiently. Always ready with a smile."
"I was impressed by Jose Maria's ability to acquire the knowledge of the different subjects. His ambition and productivity was the reason why he was my partner for the final project."
"He is a really professional and nice guy, loyal and faithful. He worked always hard and concentrated. He is an enrichment, professional and personal."
Open Source Open Source
bashunit
Librería de testing para scripts bash inspirada en PHPUnit. Lleva prácticas de calidad a shell scripts y pipelines de CI.
Phel Lang
Lenguaje de programación funcional que compila a PHP. Dialecto de Lisp inspirado en Clojure con estructuras de datos persistentes, macros y REPL.
Gacela
Framework PHP para aplicaciones modulares. Normaliza entry points y comunicación entre módulos para arquitecturas limpias.
bashunit · 411★
Creador y Maintainer. Librería de testing para scripts bash. Side Project del Año 2023.
Phel Lang · 505★
Core Maintainer. Lenguaje funcional que compila a PHP. Dialecto de Lisp inspirado en Clojure.
Gacela · 133★
Creador & Maintainer. Framework PHP para aplicaciones modulares.
Charlas Charlas
35+ charlas y workshops desde 2021. Conferencias internacionales, meetups y comunidades de software craftsmanship.
- International PHP Conference Berlin / Munich · 2022–2026 TDD, refactoring, Phel, AI co-pilot, workshops de pair programming
- WeAreDevelopers World Congress Berlin · 2023 Phel Lang, Extreme Programming
- PHPers Summit Poznan · 2023 Phel Lang
- Code Talks Hamburg · 2022 Update Your Team to be More Extreme
Escritura Escritura
70+ posts publicados en chemaclass.com sobre agentic coding, liderazgo en ingeniería, craftsmanship y arquitectura modular.
Habilidades
Lenguajes & IA
Frameworks & Tools
Datos & Infraestructura
Prácticas & Liderazgo
Educación
CIFP Carlos III
Cartagena, Murcia, Spain
Técnico Superior en Desarrollo de Aplicaciones Web
2013 – 2014PHP · MySQL · Javascript
IES Ginés Pérez Chirinos
Caravaca de la Cruz, Murcia, Spain
Técnico Superior en Desarrollo de Aplicaciones Multiplataforma
2011 – 2013Java · Oracle SQL · Android
Certificaciones
Erasmus+ Programme
Via ENAE Business School (Murcia) → Lübeck, Alemania
Dec 2014 – Jun 2015Estancia profesional en Alemania (combinada con trabajo en Falk medizinische Datenverarbeitung).
Reconocimientos
bashunit: Side Project of the Year
Otorgado por Manfred · Dec 2023
Ganadores del Side Project del Año, 2023.
Primer premio como estudiante
Otorgado por Fundación Robles Chillida · Nov 2013
Primer premio de ayudas al estudio al mejor expediente en la categoría de Alumnos de Grado Superior en Desarrollo de Aplicaciones Multiplataforma.