Violeta CalvoFull Stack Engineer
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Violeta Calvo

Full Stack Engineer & Technology Partner

I design and build web applications end to end — from product idea to architecture, development and deployment. 8+ years in software, 15+ years as an engineer.

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CurrentlyTechnology Partner · SustraiLab

I am always doing that which I cannot do, in order that I may learn how to do it.

— Pablo Picasso

About me

What I can learn matters more than what I already know.

I've been an engineer for more than 15 years, and a software engineer for more than 8. I started in industry — wind turbines, bike-sharing systems, IoT, and a patent along the way — and moved into software in 2015. Since then I've built full-stack applications and taken part in every phase of development, as Full Stack Engineer, Backend Engineer and Tech Lead.

Today I'm a Technology Partner at SustraiLab, where I turn ideas into products end to end. I do my best work remotely, in small, empowered teams where I can see the impact of what I build, exchange ideas with my colleagues and grow together.

I value flexibility and asynchronous communication: they let me fit my work around my life while protecting the focus time I need to do my best work. And I believe that with a strong written culture, a remote team can stay async and still be close enough to help each other grow.

  • Remote & asyncFlexible hours that fit my life, with protected focus time.
  • Small, empowered teamsStartups where I can see the impact of my work.
  • Written cultureKey to staying async while still exchanging enough.
  • Grow togetherExchanging ideas and feedback to help each other grow.

Experience

Building software since 2015

  1. 2025 — Present

    2025 — Present

    SustraiLabCurrent

    Technology Partner

    I turn product ideas into working digital products, covering product strategy, architecture, development and deployment. I build modern web applications and SaaS products with a strong focus on simplicity, automation and AI-assisted workflows.

    • Product strategy
    • Architecture
    • SaaS
    • Automation
    • AI-assisted workflows

  2. May 2024 — Jan 20259 months

    May 2024 — Jan 20259 months

    Hiboo

    Senior Full Stack Engineer

    hiboo.io(opens in a new tab)

    I joined an experienced team with a flat hierarchy, where everyone had a lot of autonomy and responsibility.

    • Backend migrated to a ports and adapters (hexagonal) architecture.
    • Custom agile methodology inspired by Shape Up, Scrum and Marty Cagan's ideas.
    • The Tech Lead role in the product trio rotated between us.
    • TypeScript
    • Node.js
    • React
    • Express
    • PostgreSQL
    • GraphQL
    • REST

  3. Jun 2023 — May 2024

    Jun 2023 — May 2024Career break · Health & well-being

  4. Apr 2022 — Jun 20231 yr 3 mos

    Apr 2022 — Jun 20231 yr 3 mos

    Greenly

    Tech Lead · Full Stack Engineer

    greenly.earth(opens in a new tab)

    Tech lead from August 2022. I was glad to coach the team to grow and to help find solutions at a higher level than I had before.

    • Coached the team through 1:1s, technical feedback in PR reviews and technical solution design.
    • Developed and improved features and fixed bugs using best practices and clean code.
    • Built our own work methodology, inspired by Scrum and Shape Up, to fit our needs.
    • Node.js
    • React
    • Express
    • TSOA
    • PostgreSQL
    • TypeORM
    • Heroku
    • AWS

  5. Jul 2020 — Mar 20221 yr 9 mos

    Jul 2020 — Mar 20221 yr 9 mos

    Flitdesk

    Backend Engineer

    flitdesk.com(opens in a new tab)

    I was glad to learn from my colleagues by exchanging, giving and receiving feedback, and taking decisions to migrate to a more modern stack and cleaner code.

    • Migrated legacy code to a more modern framework and a distributed architecture that fit our customers' needs.
    • Developed new features and services and fixed bugs as part of the backend team.
    • Switched our management from Scrum to a custom Shape Up in early 2021.
    • Node.js
    • NestJS
    • Next.js
    • LoopBack
    • GraphQL
    • TypeScript
    • Stripe API
    • GCP
    • MongoDB

  6. Dec 2018 — Jul 2020

    Dec 2018 — Jul 2020Career break · Family time

  7. Mar 2015 — Nov 20183 yrs 9 mos

    Mar 2015 — Nov 20183 yrs 9 mos

    Brozerly

    R&D Full Stack Engineer → Lead Full Stack Engineer

    The only full-time developer for the first 10 months, then the only developer and web engineer in the company, working hand in hand with the CEO.

    • Took the CTO's prototype to a production PWA with Meteor, and built and published the Android and iOS apps with Cordova.
    • Designed and built the back office, including advanced Stripe payments and refunds.
    • Also handled graphic design, translations (FR/EN/ES), video animations and social media marketing.
    • Meteor
    • MongoDB
    • JavaScript
    • CoffeeScript
    • Stripe API
    • Jekyll
    • Heroku
    • AWS

Projects

Websites made with Sustrai Studio

Sustrai Studio is my own brand for websites for people and groups close to me, from the first idea to going live.

Roots · 2004 — 2014

Ten years of industrial engineering came first

From wind turbines to bike-sharing locks and IoT: the engineering years before software, including a granted patent.

  1. 2014

    ULMA Embedded Solutions (opens in a new tab)IoT Embedded Systems Engineer (intern)

    IoT application to control and monitor industrial washing machines remotely, device and desktop side, for my MSc final project.

  2. 2014

    HOFF distribution (opens in a new tab)3D Engineer (intern)

    A 3D marketing animation and 3D molds for wooden skateboards, working in French.

  3. 2011 — 2013

    Bonopark (opens in a new tab)Design and Development Engineer

    Designed the bike-to-dock lock for San Sebastián's bike-sharing system. My VBA tools for SolidWorks cut 2D plan production from a day to about an hour.

    Co-inventor · Patent EP2955092System for anchoring and recharging electric rental bicycles(opens in a new tab)
  4. 2007 — 2009

    Matis Hispania · Gamesa (opens in a new tab)Control Software Support Engineer

    Co-designed the first auto-diagnosis algorithm for wind turbines, and analysed control software errors.

  5. 2004 — 2007

    Schneider Electric (opens in a new tab)Continuous Improvement Process Engineer

    Led 5S, Lean Manufacturing and 6 Sigma projects. My VBA tools saved each manager 2 hours a week.

Education

Four engineering degrees

A little more about me

Languages

Spanish
Native
English
B2 · TOEIC 900
French
B2 · Professional
Basque
B1

Staying active

When I'm not creating software, staying active is a priority. It keeps me healthy, focused and energized for my son and my work.

  • Pole dance & acrobatics
  • Scuba diving

Education & community

Education and community matter a lot to me. I've been a homeschooling mom, and my son now goes to an alternative school with a Montessori approach. What I value most is an education that respects each child's rhythms and helps them listen to themselves, resolve conflicts and collaborate. I also take part in projects with other families.

I also enjoy

  • Playing with my son
  • Learning something new
  • Enjoying nature
  • Watercolors & lettering
  • Singing & guitar
  • Sewing & knitting, now and then