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About Kaleidos and Penpot Kaleidos is the company behind Penpot, the first open source design platform built for design and code teams to work together. We're a horizontal organization, with no traditional hierarchy, and our values are grounded in free software principles, along with honesty, feminism, work-life balance, transparency, generosity, and joy in what we do. At Kaleidos we have a real commitment to diversity in all its forms. Our team is made up of more than 50% women, and we'd love to find new teammates who share our values, who we can keep learning from and keep building Penpot with.Kaleidos is the company behind Penpot, the first open source design platform built for design and code teams to work together. We're a horizontal organization, with no traditional hierarchy, and our values are grounded in free software principles, along with honesty, feminism, work-life balance, transparency, generosity, and joy in what we do. At Kaleidos we have a real commitment to diversity in all its forms. Our team is made up of more than 50% women, and we'd love to find new teammates who share our values, who we can keep learning from and keep building Penpot with. What will your work be like? At Penpot we build the design tool that brings together people who design and people who code, within a free, collaborative software environment. We're constantly adding new features that the community and our users ask for, and our challenge is to make all of them as stable and efficient as possible. You'll be part of a small team working in Rust on Penpot's rendering engine (built with WASM, Rust, and Skia), on the text editor, and on ongoing performance improvements. Your work will be focused on fixing bugs, improving performance, and building new features for that engine. Performance is the main focus: help us make Penpot run smoothly in the browser, with response times as fast as possible. You'll also have some points of contact with the frontend, mainly when it comes to passing data between Clojure and the engine. That's why you need to feel comfortable with web programming and with the fundamentals of functional programming. We're looking for someone with senior, solid, consolidated experience, to work within a horizontal team with no manager figure: autonomy and shared decision-making are part of the role. At Penpot we build the design tool that brings together people who design and people who code, within a free, collaborative software environment. We're constantly adding new features that the community and our users ask for, and our challenge is to make all of them as stable and efficient as possible. You'll be part of a small team working in Rust on Penpot's rendering engine (built with WASM, Rust, and Skia), on the text editor, and on ongoing performance improvements. Your work will be focused on fixing bugs, improving performance, and building new features for that engine. Performance is the main focus: help us make Penpot run smoothly in the browser, with response times as fast as possible. You'll also have some points of contact with the frontend, mainly when it comes to passing data between Clojure and the engine. That's why you need to feel comfortable with web programming and with the fundamentals of functional programming. We're looking for someone with senior, solid, consolidated experience, to work within a horizontal team with no manager figure: autonomy and shared decision-making are part of the role. What do we need We believe that education can be acquired in many ways, not just through a degree. That's why we don't require specific formal education, but we do expect you to have senior experience in the following areas: • Rendering engines. Here you'll find WASM, Rust, and Skia (so it's great if you have experience building game engines, graphics libraries, rasterization, GPU pipelines...). You don't need to be an expert in these specific technologies or in graphics APIs, but you should have definetely worked with them before, and feel comfortable getting better at them. • Hands-on experience with frontend technologies, with a good command of JavaScript, browser APIs, HTML, and CSS. • Regular use of LLMs (Claude, Cursor, ChatGPT, OpenCode...) as part of your way of working, among other things to make it easier for you to interact with and integrate into Penpot's Clojure core. We've brought AI into our development processes and we have open discussions and workstreams focused on finding the best way to use AI, taking into account many different aspects (technological possibilities, digital sovereignty / open source, ethics...). • Comfortable working in Linux environments. • Languages: high level of spoken and written English and Spanish. We need you to be able to read and write technical documentation and speak functionally in English, since it's the first language for some kaleiders. It's also necessary that you know Spanish (spoken and written), since many team meetings are …

About Kaleidos and Penpot Kaleidos is the company behind Penpot, the first open-source design platform built for design and code teams to work together at the same scale. We're a horizontal organisation, with no traditional hierarchy, and our values are rooted in open-source principles, alongside honesty, feminism, work-life balance, transparency, generosity and joy in what we do. At Kaleidos, we have a genuine commitment to diversity in all its forms. Our team is made up of more than 50% women, and we'd love to welcome new colleagues who share our values, from whom we can keep learning and with whom we can keep building Penpot. What will your work be like? At Penpot, you'll take part in a range of projects and features across the product, with a strong focus on solving real problems identified by our users: improving their experience through new features, tackling pain points and bugs, and delivering quick wins with a direct impact on their day-to-day work. You'll be able to move across different parts of the product, so you'll quickly get up to speed with the context behind each problem and propose solutions that work for Penpot users worldwide. We're looking for someone with solid, well-established experience. You'll work within a horizontal team, where autonomy and shared decision-making are part of the role. What do we need We believe expertise can be gained in many ways, not just through a formal qualification. That's why we don't require a specific degree, but we do expect experience in the following: • Interest in or experience with reactive programming (at Penpot we use RxJS). • A background as a frontend developer (backend-for-frontend), with solid command of JavaScript, browser APIs, HTML and CSS, and experience with JS frameworks (we mainly use React). • Motivation to build robust, carefully crafted user interfaces. • Knowledge of, and hands-on experience with, functional programming. Day-to-day work is in ClojureScript, but you don't need to master it from day one: you can learn it as you go, drawing on LLM tools for support. • Regular use of LLMs (Claude, Cursor, ChatGPT, OpenCode...) as part of how you work. We've recently introduced agents into our day-to-day, and we keep an open, ongoing conversation about the use of AI. • Comfortable working in Linux environments. • Languages: a high level of spoken and written English. You'll need to read and write technical documentation, and speak with fluency and precision, as English is the first language for some kaleiders. You'll also need a functional level of Spanish (spoken and written), as many team meetings take place in this language. Earn extra points • Familiarity with Clojure or other functional languages (Scheme, Lisp...). • Knowledge of JavaScript testing (Jest, Cypress...) and end-to-end tests with Playwright. • Interest in solving user problems with new languages and frameworks. • Interest / knowledge in accessibility and responsible development. • Interest / knowledge in design systems and their integration with product development. • Previous experience or genuine interest in open-source projects. • Use of agile methodologies in a professional environment. • Background of collaboration in diverse teams (design, marketing, backend...). • Ability to ask the right questions to help product development. Who will you be working with? Meet the product team and your future colleagues at Kaleidos! What do we offer? • Salary : €60 - 67k (gross annual salary) • Permanent contract . We’re looking for someone to stay with us for the long run! • Flexible hours . Even better! We all work from 10am-2pm CET . You can work the rest of your hours whenever you want. Whether you’re an early bird or a night owl, you’ll be in good company! • 37,5h/week as part of our plan for creating a better work-life balance. • 100% remote position . We maintain an office in Madrid (Spain), however, attendance at this location is discretionary. You are welcome to work remotely from any location with a reliable internet connection, provided that we share a time zone CET +/- 1 or you may choose to come to the office as often as you need. • 23 days of paid leave , plus December 24th and 31st, and the possibility to ask for 10 extra non-paid leave days. We’re super flexible with your dates, you just need to make sure it’s fine with your team. • Choose the holiday calendar of where you live or from the headquarters (Madrid). • Continuous learning with internal and external training, conferences, and events (as a general rule we usually cover 100% of the cost). You’re encouraged to experiment with new best practices! • Language classes on the house (eng & span) : classes paid for by the company as part of your work schedule. • 2 PIWEEKs per year! A PIWEEK is a freeform week-long hackathon where you pause your day-to-day work and focus, either alone or in a team, on a cool project! Penpot was one of the projects born in past …

About Kaleidos and Penpot Don't see the perfect role for you? Submit a proactive application here! For spontaneous applications like this, we highly value including a cover letter that helps us get to know you better: what motivates you to join the team, what kind of role you think would suit you best, or any details that help us understand why you’re particularly interested in working at Kaleidos or Penpot. We love hearing what excites you! ----- We defend and believe in open-source and proof of this is that our main project, Penpot , reflects that. We’re convinced that technology isn’t neutral. That’s why we like to shake things up and go against the status quo . Penpot is the open-source design platform for teams that need scalable collaboration between designers and developers . Kaleidos is the company boosting Penpot. If you’re interested in getting a deeper sense of our culture and values, have a look at our website to gain insight into who we are and what we believe in. What will your work be like? No matter which area you work in at Kaleidos, you’ll experience truly horizontal and agile workflows. Teams self-organize, choosing their own direction and tools. We follow open-source principles, listening to the community and prioritizing non privative technologies. Our flat structure thrives on dialogue, so we’re always refining how we communicate. You can actively participate in Kaleidos committees , where we identify ways to improve workflows and working conditions. Here, your voice matters. We’re a small team growing intentionally . While we’re hyper-focused on making Penpot an exceptional product for the community, we’re equally committed to maintaining a great and inclusive work environment. Want to learn more? Let’s talk! What do we need Our team is a mix of tech experts and design professionals, with great agile management skills. We also have dedicated teams in Product, QA, Infra, Marketing, People & Growth , all working together to innovate and improve Penpot. Tech applicants note: we mainly work with functional programming and open-source tools/languages . Full-stack flexibility (comfort with both frontend & backend) is a big plus. At Kaleidos, we keep things flat and self-organized; there is no traditional management hierarchy here. If you thrive in teams where everyone contributes equally, you'll feel right at home. We walk the talk on open-source philosophy: All roles (yes, even design and corporate!) require using Linux distributions as our primary OS whenever possible. We operate in both Spanish and English , so comfort communicating in both languages is essential for all positions. We're proud to be a feminist, diverse, and inclusive company. If these values resonate with you, we'd love to hear from you! Our core team works in Spain time (CET/CEST), so we look for candidates in compatible time zones (±1 hour difference). We don’t open many roles throughout the year, so if you don’t see a posted position, it’s unlikely we can create one ad hoc. That said, we do our best to respond to every application and would love to stay in touch for the future! :) Earn extra points We’d be absolutely thrilled (and it’s a big plus for any role) if... • You have experience in self-organized or flat-hierarchy environments . • You’re actively engaged in (or advocate for) diversity in tech or open-source philosophy. • You’ve worked at digital product companies before . • You’re already familiar with Penpot ! ^^ Who will you be working with? The Kaleidos team can't wait to meet you! Peek at their profiles, passions and positions on our site . What do we offer? At Kaleidos, we organize through committees: teams dedicated to improving life for all Kaleidos team members while keeping our focus on making Penpot better every day. That's why we've spent years building inclusive benefits. Want to know more? Here are some highlights: • Permanent contract . We’re looking for someone to stay with us for the long run! • Flexible hours . Even better! We all work from 10am-2pm CET. You can work the rest of your hours whenever you want. Whether you’re an early bird or a night owl, you’ll be in good company! • 37,5h/week as part of our plan for creating a better work-life balance. • 100% remote position . We maintain an office in Madrid (Spain), however, attendance at this location is discretionary. You are welcome to work remotely from any location with a reliable internet connection, provided that we share a time zone CET +/- 1 or you may choose to come to the office as often as you want. • 23 days of paid leav e, plus December 24th and 31st , and the possibility to ask for 10 extra non-paid leave days. We’re super flexible with your dates, you just need to make sure it’s fine with your team. • Choose the holiday calendar of where you live or from the headquarters (Madrid). • Continuous learning with internal and external training, conferences, and events (as a general …