Vizzuality avatar



Junior/Mid Backend Engineer | €20-35K

  • 🇪🇸 España

  • 🇵🇹 Portugal

  • 🇬🇧 UK

  • 🇬🇧 Fluent English required

  • Programación
  • Backend
  • Node

We are looking to grow the Back End Team at Vizzuality with people who have working knowledge and/or experience using NodeJS. 

We are offering for this role a salary range of 20K - 35K Euros (depending on your experience), and we are open to explore full time and part time contracts options (with a minimum of 50% time dedication) depending on the candidate's needs. We are also offering remote work for this role.

We have operations in Spain, Portugal and the UK, so you will be very welcome to join us if you live and are eligible to work in any of these 3 countries.

1.Would you like to be part of Vizzuality’s story?

Are you motivated by the desire to help build a sustainable planet for all life on Earth? Are you looking for a new opportunity?

Vizzuality’s purpose is to reach a fair and sustainable planet by creating tools that radically empower people to make positive changes now.

We are a world-leading technology agency based in Madrid, Cambridge, and Porto. We design and develop data-driven tools and applications for international organisations who focus on Climate Change, Biodiversity and Inequality.

Solving such large and complex problems will bring you into contact with new technology and some of the world’s most interesting organisations and academics in machine learning, remote sensing, and planetary data. You’ll be working on projects like these:

2.Our Culture “This is how we do things here”

Our aim is to help the world become a better place, therefore we need to make sure we care about our people and give them the power to build great things. These are some of the things that define our culture:

We Trust:

  • Our team structure relies on self-organisation. 
  • We want to work with colleagues who don't have to look ‘up’ for approval, nor look ‘down’ and give instructions. 
  • As soon as you step inside, we will provide you with the best tools and technology, and then we will trust you to do great things. 

We Care:

  • For ourselves, our colleagues, the organisation. 
  • We know what we do is important and we have a strong sense of responsibility for the work we do.

We Grow:

  • As we are always embarking on new projects and challenges, a continuous learning mindset and a “Can Do” attitude is a must 
  • We are conscientious, we focus on learning and achieving our goals
  • We give power to people so they can make decisions, and plot their own paths with help from all around them

We have fun:

  • We also know that you need to balance seriousness with fun. 
  • If you can make people smile you will be off to a great start!

3.Skills and experiences we are looking for in a candidate

(*) Even if you think you don't tick all the boxes below, we'd still love to hear from you. Nobody checks every box, and we are looking for someone excited to join the team and aligned with our purpose!

For Mid-level profiles:

  • You Have fluency and feel comfortable using NodeJS/TypeScript.
  • few years of experience in a relevant position (ie. Back End, Software Engineer, etc.)
  • Experience with the full life cycle of a project, including production deployments, and at least medium sized code bases.

For Junior profiles:

  • Working knowledge of NodeJS.
  • Understanding of the building blocks in website development.
  • Interest in server-side technologies.


Anything else to impress us? Over time, we’d like this role to take on more responsibilities. If you have experience across one/some/all of the areas below, or would like to learn more about any of them, we would love to hear more about it!

  • SQL and/or document-based datasets in production projects
  • Docker or container technologies for development environments and for production deployments.
  • Development of services and components within larger, modular architectures such as microservices systems.
  • Cloud APIs (e.g. cloud storage, cloud functions, etc.).
  • Rails and/or Python 
  • Data Engineering. ETL (Extract, Transfer, Load) understanding. Knowledge of algorithms and data structures.


We are a Self-Managed Organisation: Below you will find some characteristics that make people successful in an organisation like ours:

  • Motivation: The willingness and aspiration to excel in the pursuit of unselfish, collective goals; deep personal humility and a focus on self improvement.
  • Curiosity: The instinct to seek new experiences, knowledge and feedback with an openness to learning and change.
  • Insight: The ability to gather and make sense of information that suggests new possibilities.
  • Engagement: The capacity to use emotion and reason to communicate a persuasive vision and connect with people.
  • Determination: The ability to pursue and work on difficult goals despite challenges.

4. A day in the life of a Back End Engineer at Vizzuality

We’re looking for someone to work alongside a world class and super talented team of engineers, designers, researchers, scientists and project managers. Someone who is passionate about using their creativity and technical skills to make a difference in people’s lives, the environment and to help make the world a better place. 

  • You will be designing and developing cross-functional, multi-platform application systems to ingest, process, analyze and serve large amounts of data in the cloud, often in real time, and ensure their craftsmanship, availability, resilience, and scalability.
  • Working hands-on across our stack is one of the things Engineers at Vizzuality do the most. 
  • Our core stacks are NodeJS/TypeScript (with Express/Koa/NestJS as main frameworks depending on projects) and Ruby on Rails. You will be working on NodeJS/TypeScript projects and will also be experimenting with new technologies. If you don't know about a specific technology or get stuck on a tricky problem, you will always have someone around to help you learn and move forward.
  • You will have the opportunity of taking ownership of projects and participating in meetings with clients at different stages of the development process in order to help define requirements, propose solutions and alternatives.
  • A lot of your time will be spent liaising with data scientists, front-end engineers, project managers, and designers to find novel and creative technical solutions that solve specific client/project needs and integrate disparate technologies such as remote sensing, machine learning, image processing or statistical computing into public APIs
  • You will also be communicating with users, colleagues, leading scientists and decision makers to collect requirements, describe features and technical designs, and define product strategy.
  • Last but not least, our engineers ensure software quality, robustness, and compliance with standards by reviewing code, documenting, and creating automated tests.

5. These are some of the things you will be doing and achieving in your first year at Vizzuality

In 1 month.

  • You’ll pair with your peers in the backend team so you get used to the way of doing things at Vizzuality.
  • You’ll read documentation, write new features and participate in team meetings (weekly, with the possibility of daily stand ups on some projects). 
  • You’ll get to know people from the rest of the functional teams (science, design, front-end, business development) and development teams. 
  • At the end of your first month, you’ll be joining a longer project.

In 6 months.

  • You’ll develop ownership of areas of the projects you work on. 
  • You’ll write features, documentation, tests and fixes. You will be joining the back end work within your project team and with support from the back end functional group. 
  • You’ll also have opportunities to develop your skills around data-rich application engineering, cloud computing and data processing. 
  • Finally, you’ll participate in the definition of architectures and functional features for new project phases or new projects.

In 1 year.

  • You’ll already have written several innovative features for ground-breaking projects with large real-world impact (we absolutely mean this!).
  • You’ll be taking ownership of substantive features within larger backend projects.

6. Compensation, Benefits & Growth “This is what you get when you join Vizzuality”

Our compensation and benefits are part of a great career opportunity with the potential for you to grow and work in something with a massive transformational purpose. So if you really care about the real-world impact of your work and are inspired by our mission to transform the world, we can offer you:

Compensation & Benefits:

  • A competitive salary. We are offering between 20K and 35K Euros. This range is only an indication and we will agree your final salary together based on your specific experience and profile (Mid or Junior)
  • A yearly bonus up to 10% of the salary, depending on the company's performance and your own.
  • If you are based in Spain or Portugal, you will get Health & Dental Insurance subsidised by the company.
  • Mental health support via Spill, our third party provider, to connect you with qualified counsellors and curated resources.
  • 22 Holiday Days + 1 Day for your birthday.

Work and Personal Life Integration:

  • We are open to explore full time and part time contracts options (with a minimum of 50% time dedication) depending on the candidate's needs.
  • We have a remote-friendly culture with teammates located across four countries and 10 cities. We run all our meetings online, and create opportunities for the online experience to be better every day.
  • We offer a flexible work environment and flexible hours, and as long as you do what you have to do, meet your objectives and coordinate accordingly with your team, we are not so worried if you work at the office, in a coffee shop, on your sofa at home, or at the beach!

Learning and working on new and interesting things is fun so we offer many opportunities to do so:

  • A training allowance of 1300 €/year for courses, workshops, conferences or meetups of your choice, including travel and lodging.
  • Get your hands on cool technology and applications to do your work, communicate, and build great things.
  • You will work alongside a talented team of engineers, designers, and scientists with multiple backgrounds and skills.
  • Peer mentoring.
  • You will have the freedom to design a career path that suits your interests and growth needs.
  • Support for giving talks and contributing to open source projects/initiatives that align with Vizzuality.

7. Recruitment Process Overview

Do you have what it takes to change the world? If after reading the description of the role, you like our culture and you believe you have what it takes to join Vizzuality, please send us your application. 

This is how the recruitment process looks like and also some suggestions for you to include and consider in your application.

Basic Requirements:

  • Having a legal permit to work in Spain/Portugal/UK is mandatory and required, so make sure to state and confirm you are eligible to work in one of our countries. 
  • In other words, even if you match all requirements for the role and have the best skills, if you don't have the legal permit to work in one of our countries, we won't be able to include you in the recruitment process.

Application: 16th to 31st July

  • Send us your CV and Cover Letter, explaining why you would like to work with us and what you can bring to the team. 
  • Please include any samples of your work and projects you find relevant to the offer. 
  • Fluent English is really important to us, so if it’s not your first language please demonstrate your abilities in your CV and Cover Letter.

First Screener: 9th to 20th August

  • This is a 60 minute informal interview so you can get to know a bit better the company, our culture and ask any questions about the role and our ways of working. 
  • From our side, we are interested in understanding more about what you are looking for and what you care about.

Challenge: 23rd August to 3rd September

  • This is the stage in which you will be given the opportunity to share what you are good at when it comes to Back End work. 
  • We want to get a better understanding of how you work, reason and solve problems, so depending on your experience and profile (Junior or Mid level) we will ask you to choose between the following options: 
    • Junior Profile: Showcase something you’ve done and that makes you proud of your Back End skills. 
    • Mid Profile: We will invite you to complete an assignment. We will send it to you via email for you to think about, you will have 1 week to prepare the challenge, and then we will ask you to send us your ideas back.

Interview: 6th to 17th September

  • You will be meeting with a few of us and we will deep-dive into your background, experience and skills. We will be also reviewing and discussing your Coding Challenge together.
  • This will be another opportunity for you to ask us questions about the role and the company.

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