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Senior Frontend Engineer & Team Lead

Remoto, España
Full-time
Permanent employee

About this role

The challenge
As a Senior Frontend Engineer & Team Lead, you will play a key role in owning and evolving the frontend domain within a small, highly autonomous squad. Your mission will be to define the frontend architecture, standards, and delivery practices, transforming business requirements into scalable, maintainable, and high-quality user interfaces.

You will combine hands-on development with technical leadership, acting as the reference point for frontend decisions while enabling other engineers to succeed. In this context, leadership is not about managing large teams, but about setting direction, ensuring quality, and fostering a strong engineering culture.

You will be responsible for evolving the frontend platform based on React and TypeScript, driving architectural decisions such as modular design, monorepos, shared libraries, and design systems. You will ensure consistency, scalability, and performance across applications, while continuously improving developer experience and frontend workflows.

Collaboration will be essential. You will work closely with Product, Design, and Backend teams to translate business needs into technical solutions, align on UX implementation, and define API contracts. You will also contribute to broader platform decisions, ensuring the frontend integrates seamlessly within the overall system architecture.


Requirements that are important for us

We are looking for a Senior Frontend Engineer with strong technical expertise and leadership capabilities, capable of owning the frontend domain end-to-end while contributing hands-on to development and delivery.


Relevant experience and expected outcomes:
  • 5+ years of experience in frontend development, working with modern frameworks in production environments.
  • Proven experience with React and TypeScript, building scalable and maintainable applications.
  • Experience acting as a technical reference or informal team lead in small teams.
  • Strong experience defining and evolving frontend architectures (modular systems, monorepos, shared libraries).
  • Designing and maintaining design systems aligned with product and UX needs.
  • Experience working with microfrontends and modular frontend strategies.
  • Leading frontend development practices, including code reviews, testing, and performance optimization.
  • Collaborating with cross-functional teams (Product, Design, Backend) to deliver high-quality solutions.

Key skills and expected impact:
  • Ability to translate business and product requirements into robust, scalable frontend solutions.
  • Strong understanding of frontend architecture principles:
  • Domain-Driven Design (DDD)
  • Hexagonal architecture
  • SOLID principles
  • Deep knowledge of the React ecosystem and modern frontend tooling.
  • Experience with design systems and atomic design principles.
  • Strong focus on performance, accessibility (a11y), and user experience quality.
  • Ability to ensure code quality, maintainability, and observability across the frontend.
  • Strong mentoring and leadership skills: enabling others through feedback, pairing, and guidance.
  • Ownership mindset with the ability to drive initiatives from concept to delivery.
  • Pragmatic decision-making: balancing long-term architecture with short-term delivery needs.
  • Strong communication skills to align with both technical and non-technical stakeholders.

Tools
  • Frontend technologies: React, TypeScript, TailwindCSS, shadcn, React Query
  • Testing: Testing Library and related tools
  • Build and tooling: Vite, Turbopack
  • Design & collaboration: Figma
  • Development environments based on modular architectures, monorepos, and microfrontends
  • AI-assisted development tools (e.g., Claude Code or similar)

About us

Plenit (formerly Jotelulu) is the Operating Platform for IT Service Providers. We help MSPs, ISVs, VARs, and IT resellers run, scale, and grow their businesses on top of our own sovereign infrastructure, with footprint across Europe and the Americas.

We are a European cloud platform with a clear conviction: digital sovereignty matters, and the IT channel deserves a partner that speaks their language, builds for their reality, and stays close to the ground. We are not enterprise-y. We are simple, pragmatic, and obsessed with our partners’ success.

Five years in, we are 130 people, four countries, and growing fast — which is exactly why we are bringing this role on now.

 
We’re passionate about technology, but we’re also a bit geeky—we love Star Wars, video games, 90s movies, and pop culture. We work hard and with passion, but we also have a great time together. At Jotelulu, you’ll find a balance between work and fun, where teammates often become friends, and boredom is rare—there’s always something new, unexpected, and memorable happening.



Videos behind the scenes

Meet our team!





This is how we roll at events!




Our own event, the SUMMIT




What We Offer

At Plenit, we aim to create an environment where people can grow, enjoy what they do, and bring their best selves to work. That’s why we’ve designed a benefits package that reflects who we are, how we work, and what we value as a company.

Our Culture

Our culture is how we work, how we relate to one another, and how we build something meaningful together.
It’s not about “cool” values for a website — it’s about real behaviors we live every day: a positive atmosphere, accountability, trust, and effectiveness.


We are committed to:


A great working environment built on teamwork, optimism, joy and the drive to do things well.
Responsibility and ownership, because everyone knows what needs to be done and finds the way to make it happen.
Trust, as the foundation of teamwork and our relationships with partners.
Effectiveness, focusing on results and constantly challenging ourselves to ensure we’re on the right path.


Special Days       
You’ll enjoy:       
December 24th and 31st off,       
Your birthday off — because we believe your day should be yours.       
       
Competitive Salary          
We offer a competitive salary aligned with the market and reviewed periodically to ensure fairness and recognition.          
          
Continuous Learning          
We support your professional growth through internal training, learning resources, and development plans tailored to your career path.          
          
Private Health Insurance          
You’ll have access to private health coverage, giving you peace of mind and support in your day-to-day life.          
          
Informal Events          
We believe in celebrating achievements, strengthening team bonds, and having fun along the way. We regularly organize informal events and activities to enjoy time together and reinforce our team spirit.