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Tech Lead

Hybrid in Barcelona·Added yesterday (last checked 29 Oct)

011h

21 open roles

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Our summary

Work mode: Hybrid, Barcelona
English: Required
Experience: 6+ years

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Skills

This job advert was originally written in Spanish.

Requirements

What we're looking for

6+ years of experience in software development, with 2+ years leading teams with direct reports (tech lead, engineering manager, or similar).
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.
A demonstrable track record of technical mentoring and raising the team's level through code reviews, 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 workflows (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.

Nice to have

Previous experience in construction tech, PropTech, AEC, or BIM/IFC tools.
Experience scaling engineering teams (hiring processes, technical onboarding, career definitions).
Experience with Kubernetes (EKS)
Experience building or integrating AI pipelines into products (LLMs, OCR, agents).

Pay & benefits

What you'll get

What we offer

🌱 Real impact: being part of a company that is transforming construction towards a sustainable and planet-positive model
📈 Professional growth: individual development plan with opportunities for continuous learning and training
🤝 Good atmosphere and collaboration: multidisciplinary, diverse team with a culture of support and closeness
🧘 Well-being and balance: for us, the balance between your personal and professional life is important, which is why we enjoy two days of remote work 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

The role

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-friendly 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 knowledge of architecture and engineering 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, professionals from design, construction, and software work collaboratively in a dynamic, ambitious environment focused on sustainability. If you are inspired by the idea of changing how the world is built, this is your place.

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

What you'll do

Lead a squad of 3-6 full-stack engineers as their manager, setting the technical direction for the domain and being responsible for the quality of what we deliver.
Manage the people on your team: 1:1s, feedback, performance reviews, professional development, and participation in hiring.
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 continue to be development, especially in the most critical or highest-risk parts of the system.
Lead code reviews and squad mentoring, raising the technical level of the team and unblocking your teammates.
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 day-to-day, contribute to automated workflows ("claude-ready" tickets, assisted review, PR generation), and share learnings with the rest of Engineering.
Be the owner of your domain's technical roadmap: identify relevant technical debt, plan refactors, define SLOs, and ensure observability.
Guarantee best practices in 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), APIs 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 we will be incorporating as part of our AI-native strategy.

About 011h

011h is a construction technology company that industrializes and digitizes the building process to deliver high-quality, sustainable residential projects at scale. Based in Barcelona, the company combines off-site prefabrication, continuous improvement methodologies, and data-driven tools to transform traditional construction, improving efficiency, safety, and environmental performance. With a focus on multifamily housing, 011h positions itself as a tech-enabled builder rather than a traditional contractor, and has been expanding its operations in Spain and internationally.

In Spain, 011h is headquartered in Barcelona and is actively hiring for on-site construction roles across the country. The company emphasizes innovation, standardization, and employee development, making it an appealing option for international professionals with experience in modern construction methods, industrial engineering, or building information modeling. While the day-to-day language is Spanish, the company's technology-driven approach and growth mindset offer opportunities for those bringing new perspectives, especially in technical and managerial positions.

Industry: Construction
Founded: 2019
Employees: 100–250
Headquarters: Barcelona, Spain
In Spain: Barcelona

Good to know if you are moving

Offers opportunities to work on innovative, prefabricated and sustainable construction projects in Spain.
The company has a strong technological focus, using product development and process engineering to optimize construction.
Their headquarters is in Barcelona, a major European tech and business hub.
Open roles include technical and management positions in construction, from junior structural engineers to chief of production.

In their own words

Additional information

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

All open roles at 011h