011h is a Barcelona-based construction technology company that is transforming the building industry through a digitalized and industrialized approach. By integrating advanced software with sustainable materials like mass timber, the company aims to create high-quality, carbon-neutral residential buildings more efficiently and reliably than traditional construction methods.

Headquartered in Barcelona, 011h offers a unique environment for international professionals at the intersection of PropTech, architecture, and sustainability. The company actively recruits for roles in BIM coordination, structural engineering, and product management, making it an attractive destination for expats looking to work on cutting-edge green construction projects within a tech-driven culture.

Founded in 2020 by Jose Manuel Villanueva and Lucas Carné (founders of Privalia) along with other tech veterans. The company secured 25 million euros in Series A funding in 2022 to scale its sustainable building platform across Spain.

Tech Lead

011h

This job was originally posted in Spanish and automatically translated to English. You'll most likely need Spanish to apply.

Job Description

At 011h, we are revolutionizing the construction sector to make it more sustainable, efficient, and digital. We design and build buildings with an industrialized vision, using innovative technologies and planet-responsible materials, such as wood. Our mission is clear: to build better, for everyone.

We are the first "end-to-end" digital platform for construction in Europe. We combine architectural and engineering knowledge with the power of technology to standardize processes, automate tasks, and scale solutions that transform the sector without sacrificing design, quality, or positive impact.

At 011h, design, construction, and software professionals work collaboratively in a dynamic, ambitious environment oriented toward sustainability. If you are inspired by the idea of changing how the world is built, this is the place for you.

Currently, our area of activity is Spain, with prospects for internationalization in the coming years.

At 011h, we are looking for a Tech Lead to join our team:

What you will do:

Technically lead a squad of 3-6 full-stack engineers, setting the technical direction of the domain and being responsible for the quality of what we deliver.

Design and implement microservices architectures with a Domain-Driven Design approach, write ADRs, and guide trade-off decisions (build vs. buy, technical debt vs. delivery, consistency vs. autonomy).

Stay hands-on: approximately half of your time will still be development, especially in the most critical or high-risk parts of the system.

Lead code reviews and squad mentoring, raising the technical level of the team and unblocking your colleagues.

Collaborate from Day 0 with Product Managers and Designers to ensure that technical solutions align with the product vision and user experience.

Drive our AI-native culture: integrate tools like Claude Code into the squad's daily routine, contribute to automated workflows ("claude-ready" tickets, assisted review, PR generation), and share learnings with the rest of Engineering.

Be the owner of the technical roadmap for your domain: identify relevant technical debt, plan refactors, define SLOs, and ensure observability.

Guarantee best practices for security, testing, performance, and CI/CD throughout the development lifecycle.

Contribute to the platform strategy alongside the Head of Engineering, participating in decisions that affect the entire organization (infrastructure, standards, AI governance).

Technically represent your squad in cross-functional forums and report progress to leadership with actionable metrics.

Tech Stack

Backend: Python with FastAPI, domain-oriented microservices architecture (DDD), API-first.

Frontend: TypeScript with React, Zustand (global state management), TanStack, React Router.

Data and messaging: PostgreSQL, RabbitMQ (with Protocol Buffers for message serialization), Redis.

Infrastructure and deployment: AWS, EKS, ArgoCD, Helm, Terraform, KEDA, GitLab CI, Docker.

Quality: Automated testing (Jest, React Testing Library, Cypress, Pytest), Security by Design.

AI and productivity: Claude Code, CodeRabbit, and other tools that we will incorporate as part of our AI-native strategy.

Requirements

What we need from you:

6+ years of experience in software development, with 2+ years technically leading teams or squads (tech lead, staff engineer, or senior+ with leadership scope).

Strong full-stack experience or deep mastery of one of the two sides (Backend with Python/FastAPI or Frontend with React/TypeScript) with demonstrated fluency in the other.

Experience designing and implementing microservices architectures in production, ideally with a Domain-Driven Design approach.

Experience with relational databases (PostgreSQL) and event-driven architectures (RabbitMQ, Kafka, or other brokers).

Experience writing ADRs and leading architectural decisions with clear and documented trade-offs.

Demonstrable track record of technical mentoring and raising the team's level through code review, pair programming, or training initiatives.

Experience with CI/CD, cloud deployments (AWS preferred), Docker, and production observability.

Solid understanding of security and testing best practices throughout the development cycle.

Experience working with AI-assisted development flows (Claude Code, Cursor, Copilot, or similar) and an active willingness to lead their adoption.

Ability to collaborate cross-functionally with Product, Design, and other squads, and communicate technical trade-offs to non-technical audiences.

Fluent communication in Spanish and English.

Bonus

Previous experience in construction tech, PropTech, AEC, or BIM/IFC tools.

Experience scaling engineering teams (hiring processes, technical onboarding, career path definition).

Experience with Kubernetes (EKS).

Experience building or integrating AI pipelines into products (LLMs, OCR, agents).

Benefits

What we offer

🌱 Real impact: be part of a company that is transforming construction toward a sustainable and positive model for the planet
📈 Professional growth: individual development plan with opportunities for continuous learning and training
🤝 Great environment and collaboration: multidisciplinary, diverse team with a culture of support and closeness
🧘 Well-being and balance: the balance between your personal and professional life is important to us, which is why we enjoy two remote work days per week
🏢 Sustainable offices: pleasant spaces designed for collaboration and environmental respect
🏖️ 30 working days of vacation per year so you can enjoy your personal time

At 011h, we promote diversity and inclusion. Everyone is welcome, regardless of their origin, identity, orientation, age, or ability. We will adapt the process if you need it. Join a team that values different perspectives and experiences.

View original advert (Spanish)

En 011h estamos revolucionando el sector de la construcción para hacerlo más sostenible, eficiente y digital. Diseñamos y construimos edificios con una visión industrializada, utilizando tecnologías innovadoras y materiales responsables con el planeta, como la madera. Nuestra misión es clara: construir mejor, para todos.

Somos la primera plataforma digital "end to end" para la construcción en Europa. Combinamos el conocimiento de la arquitectura y la ingeniería con el poder de la tecnología para estandarizar procesos, automatizar tareas y escalar soluciones que transformen el sector sin renunciar al diseño, la calidad ni el impacto positivo.

En 011h, profesionales del diseño, la construcción y el software trabajan de forma colaborativa en un entorno dinámico, ambicioso y orientado a la sostenibilidad. Si te inspira la idea de cambiar cómo se construye el mundo, este es tu lugar.

Actualmente, nuestro ámbito de actividad es España, con perspectivas de internacionalización en los próximos años.

En 011h buscamos a un/a Tech Lead que se una a nuesto equipo:

Qué harás:

Liderar técnicamente un squad de 3-6 ingenieros full-stack, marcando el rumbo técnico del dominio y siendo responsable de la calidad de lo que entregamos.

Diseñar e implementar arquitecturas de microservicios con enfoque Domain-Driven Design, escribir ADRs y guiar decisiones de trade-off (build vs. buy, deuda técnica vs. delivery, consistencia vs. autonomía).

Mantenerte hands-on: aproximadamente la mitad de tu tiempo seguirá siendo desarrollo, especialmente en las partes más críticas o de mayor riesgo del sistema.

Liderar el code review y la mentoría del squad, elevando el nivel técnico del equipo y desbloqueando a tus compañeros.

Colaborar desde el Day 0 con Product Managers y Diseñadores para asegurar que las soluciones técnicas se alinean con la visión de producto y la experiencia de usuario.

Impulsar nuestra cultura AI-native: integrar herramientas como Claude Code en el día a día del squad, contribuir a flujos de trabajo automatizados (tickets "claude-ready", revisión asistida, generación de PRs), y compartir aprendizajes con el resto de Engineering.

Ser owner del roadmap técnico de tu dominio: identificar deuda técnica relevante, planificar refactors, definir SLOs y asegurar la observabilidad.

Garantizar las mejores prácticas de seguridad, testing, rendimiento y CI/CD a lo largo del ciclo de vida del desarrollo.

Contribuir a la estrategia de plataforma junto al Head of Engineering, participando en decisiones que afectan a toda la organización (infraestructura, estándares, governance de IA).

Representar técnicamente a tu squad en foros cross-funcionales y reportar progreso a leadership con métricas accionables.

Tech Stack

Backend: Python con FastAPI, arquitectura de microservicios orientada a dominios (DDD), APIs first.

Frontend: TypeScript con React, Zustand (state management global), TanStack, React Router.

Datos y mensajería: PostgreSQL, RabbitMQ (con Protocol Buffers para serialización de mensajes), Redis.

Infraestructura y despliegue: AWS, EKS, ArgoCD, Helm, Terraform, KEDA, GitLab CI, Docker.

Calidad: Testing automatizado (Jest, React Testing Library, Cypress, Pytest), Security by Design.

IA y productividad: Claude Code, CodeRabbit, y otras herramientas que iremos incorporando como parte de nuestra estrategia AI-native.

Requirements

Qué necesitamos de ti:

6+ años de experiencia en desarrollo de software, con 2+ años liderando técnicamente equipos o squads (tech lead, staff engineer, o senior+ con scope de liderazgo).

Fuerte experiencia full-stack o bien dominio profundo de uno de los dos lados (Backend con Python/FastAPI o Frontend con React/TypeScript) con fluidez demostrada en el otro.

Experiencia diseñando e implementando arquitecturas de microservicios en producción, idealmente con enfoque Domain-Driven Design.

Experiencia con bases de datos relacionales (PostgreSQL) y arquitecturas event-driven (RabbitMQ, Kafka u otros brokers).

Experiencia escribiendo ADRs y liderando decisiones arquitecturales con trade-offs claros y documentados.

Track record demostrable de mentoría técnica y elevación del nivel del equipo a través de code review, pair programming, o iniciativas de formación.

Experiencia con CI/CD, despliegues en cloud (AWS preferido), Docker, y observabilidad en producción.

Sólida comprensión de mejores prácticas de seguridad y testing a lo largo del ciclo de desarrollo.

Experiencia trabajando con flujos de desarrollo asistidos por IA (Claude Code, Cursor, Copilot u similares) y disposición activa para liderar su adopción.

Capacidad para colaborar cross-funcional con Product, Diseño y otros squads, y comunicar trade-offs técnicos a audiencias no técnicas.

Comunicación fluida en español e inglés.

Bonus

Experiencia previa en construction tech, PropTech, AEC, o herramientas BIM/IFC.

Experiencia escalando equipos de ingeniería (procesos de hiring, onboarding técnico, definición de carreras).

Experiencia con Kubernetes (EKS)

Experiencia construyendo o integrando pipelines de IA en producto (LLMs, OCR, agentes).

Benefits

Qué ofrecemos

🌱 Impacto real: formar parte de una empresa que está transformando la construcción hacia un modelo sostenible y positivo para el planeta
📈 Crecimiento profesional: plan de desarrollo individual con oportunidades de aprendizaje y formación continua
🤝 Buen ambiente y colaboración: equipo multidisciplinar, diverso y con una cultura de apoyo y cercanía
🧘 Bienestar y equilibrio: para nosotros es importante el balance entre tu vida personal y la profesional, por eso disfrutamos de dos días de teletrabajo a la semana
🏢 Oficinas sostenibles: espacios agradables, pensados para la colaboración y el respeto medioambiental
🏖️ 30 días laborables de vacaciones al año para que disfrutes de tu tiempo personal

En 011h, fomentamos la diversidad y la inclusión. Todas las personas son bienvenidas, independientemente de su origen, identidad, orientación, edad o capacidad. Adaptamos el proceso si lo necesitas. Únete a un equipo que valora diferentes perspectivas y experiencias.