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Projects

Sites, demos, events and experiments I've built or helped build, from community events to hackathons and articles.

Want to see the events where I've been a speaker? View my talks →

Events I've built

Spark Code · WTM Chile · Mar–May 2024 · Organizer

Spark Code: Dream Big, Start Small

A video game subcommunity of WTM Chile that I organized. It included a series of online talks, where I hosted, and an in-person and online event on May 5, 2024 at Movistar GameClub, with talks, a panel of women experts and networking spaces. The first event focused mainly on women in video games and organized by women.

WTM Chile · Apr 26, 2025 · Organizer

Redefine Possible

WTM Chile's International Women's Day 2025 event, on Saturday, April 26 at UNAB in Providencia, Santiago. It explored how women in tech are redefining what's possible, and it also celebrated International Girls in ICT Day.

Two photos from Redefine Possible: the organizing team posing on stage in matching shirts, and a Women Techmakers Chile sticker in front of the audience
Redefine Possible, organized by WTM Chile, April 2025

JSConf Chile · 2024 · Organizer

JSConf Chile 2024

Led the volunteer team and handled sponsorship, community management, graphics, alignment review and logistics. About 800 attendees according to Advocu.

TechTón · Feb 9–10, 2024 · Organizer and host

TechTón

A two-day online event by tech communities to raise funds for Bomberos de Chile after the forest fires in the V Región. More than 20 hours of streaming on Twitch, with 40 speakers. I held almost every role: host, speaker, producer, project manager, developer and community manager, for a massive online event built from scratch that reached close to 1,000 people, was put together in under a week, and closed with a gaming stream.

TEDxUVALPO Chile · Dec 2025 · Master of ceremonies

TEDxUVALPO Chile

The first edition of TEDxUVALPO Chile, held in December 2025 at the Sala Juan Araya of the Faculty of Architecture at Universidad de Valparaíso, under the motto “En cada rincón, una idea” (“An idea in every corner”), with eight speakers from science, engineering, medicine and culture. I hosted the event as master of ceremonies.

Speaker smiling between the red TEDx letters and the white UVALPO Chile sign on the stage of TEDxUVALPO Chile
On stage at TEDxUVALPO Chile, December 2025

Kodea · Talento Digital 2023 · Graduate

Talento Digital para Chile

Kodea is a social nonprofit that has worked since 2015 to close technology gaps for underrepresented groups, especially women. I graduated from Talento Digital para Chile, a national digital retraining program run by companies, training institutions and the state. Kodea's 2024 report features me at the launch of the book “Digital talent: the trajectory of an innovation” and lists me among the Talento Digital 2023 participants.

Leslie Herrera at the book launch event “Digital Talent: the trajectory of an innovation”
Leslie Herrera at the book launch event “Digital Talent: the trajectory of an innovation”

Websites

JSConf Chile · 2023 · Volunteer

JSConf Chile site

The landing page for the 2023 edition of JSConf Chile, built as a volunteer.

Personal site · leslie.cl

Browser AI demos

Two interactive demos that run in the browser: "The inference and your INP" compares where inference runs and its effect on INP, with the main thread, chunking and Web Workers. "An LLM in your browser" runs a language model with WASM and WebGPU.

Hackathons and competitions

#AIhackaton · CommunityOS with OpenAI · Aug 2024

Financial app with generative AI

Selected among 30 teams out of more than 1,000 applications. The team built a financial app with generative AI that links users' emotions to their relationship with money.

AVInnovate 2023 · AudienceView · Dec 2–3, 2023

After-sale hackathon

First place with team Kappa8, which won best team of the event. I contributed to the project's front end.

The international FemHack Vol. II · Nuwe · Jul 2023

Frontend challenge

Third place in the frontend challenge.

Games and design

Women Game Jam Chile · Aug–Sep 2024 · Team project

No es 18, todavía…

My first video game: a horror game with a time loop, made in Unreal Engine with a team. My computer couldn't run Unreal, so my part was in the storytelling, the project architecture (set up on a teammate's computer) and defining the low-poly visual style, including the idea of a loop where the 18 never arrives.

WWCode FrontEnd Fridays · Aug–Sep 2023 · Content creator

UI Challenge

Interface prototypes and graphics in Figma, made as learning material for frontend practice sessions in WWCode.

Coderhouse · UX-UI course · 2021

Gimmi

A gift app built as my UX-UI course project: research, Design Thinking, personas, card sorting, usability testing and components organized with Atomic Design in Figma.

Articles and tutorials

DEV Community · Apr 23, 2026

El Curb Cut Effect: Why accessibility is not a favor, it's basic architecture

An argument that accessibility is a core quality of software and not an act of charity, and that designing for specific needs improves the experience for everyone.

DEV Community · May 19, 2023

¿Cómo usar Container Queries?

A beginner tutorial on CSS container queries: defining a named container, writing styles that respond to its width, and debugging them in Chrome.

Volunteering

Laboratoria · Aug 2022 – present · Tech mentor

Technical interviews and mentoring

Technical interviews with students, to guide them in their careers as web developers.

Fundación Kodea · Mar 2023 – present · Digital Female Empowerment Ambassador

Supporting women in STEM

Supporting women to enter STEM and reduce the gender gap.

Mermelada Tech · Nov 2022 – present · Collaborator

Mermelada Tech

Collaborating with the Mermelada Tech community.

Women Who Code (WWCode) · Jun 2023 – Aug 2024 · Volunteer

WWCode FrontEnd track

UI construction in Figma and collaboration on the FrontEnd track.

JSConf Chile · Nov 2022 – Dec 2023 · Staff volunteer

JSConf Chile

Staff volunteer before becoming an organizer in 2024.

Technovation Girls Chile · Mar 2021 – Apr 2022 · Education mentor

Technovation Girls Chile

STEM program for girls. A student on my team was selected among the 100 best apps in the world.

Talento Digital para Chile · Jun 2020 – Jun 2021 · Delegate counselor

Talento Digital para Chile

Coordination and promotion of the bootcamp.

Construye+, Universidad de Chile · Volunteer construction work

Construction in rural schools

Volunteer construction work in rural schools with Construye+.

Press

T13 · October 2025

Sence lanzan más de 2 mil becas GRATUITAS en nuevas tecnologías: Revisa CÓMO postular

A news segment on new Sence scholarships for digital skills. I talk about my career change and my remote work as a software developer.

Frame from the T13 news segment about more than 2,000 new scholarships, with a woman working on a laptop covered in stickers
Frame from the T13 report on the new scholarships, October 2025

Interview · NicaWomanTech · November 2023

Leslie Herrera, un Viaje de Transformación: De Ingeniera Comercial a Desarrolladora Front End

An interview about my move from business engineering into front-end development, the role of learning communities and family support, and advice for women considering a career change.

Las Últimas Noticias · October 19, 2023 · p. 32 · Employment and Education

Ingeniera comercial quedó sin trabajo, tomó un curso rápido y le cambió la vida

A print feature on Talento Digital, the digital retraining program, with my story as one of the examples.

Printed page 32 of Las Últimas Noticias, Empleo y Educación section, with the feature on a career change and a table of free Talento Digital courses
Printed page 32 of Las Últimas Noticias, October 19, 2023

Diario Financiero · October 2022

Mujeres programadoras: tras los pasos de Ada Lovelace

A feature on women programmers. I am profiled as one of the success stories of the Talento Digital bootcamps.

InvestChile · November 2020

La importancia del talento digital para atraer nuevos negocios

I took part in the InvestChile e-Seminar panel on digital talent and specialization, where I spoke about combining digital skills with other disciplines.

Noticias Hoy · March 2023

Mujeres destacadas de la industria digital intercambian experiencias para impulsar mayor participación femenina en el sector

I shared my career-change story at the Mujeres x Talento Digital event, a meeting of women in the digital industry to talk about more women taking part in the sector.

Women applauding on stage at the Mujeres x Talento Digital event at Fundación Chile, with the event name on the screen
Mujeres x Talento Digital event at Fundación Chile, March 2023

Diario Financiero · Suplemento Talento Digital · November 2022

Talento Digital para Chile, el programa que impulsa la reconversión laboral

A supplement on career retraining. I am cited as an example of a woman who moved into programming through the program.