Helder Da Rocha
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Helder Da Rocha Email & Phone Number

Author of "Learn D3.js" and "Learn Chart.js". Dataviz consultant, full-stack programmer, teacher, author, software engineer, artist & translator. at Alconost
Location: João Pessoa, Paraíba, Brazil 12 work roles 1 school
1 work email found @argonavis.com.br 2 phones found area 199 LinkedIn matched
✓ Verified Jun 2026 4 data sources Profile completeness 100%

Contact Signals · 1 work email · 2 phones

Work email h****@argonavis.com.br
Direct phone (199) ***-****
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Current company
Alconost
Role
Author of "Learn D3.js" and "Learn Chart.js". Dataviz consultant, full-stack programmer, teacher, author, software engineer, artist & translator.
Location
João Pessoa, Paraíba, Brazil
Company size
76 employees

Who is Helder Da Rocha? Overview

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Quick answer

Helder Da Rocha is listed as Author of "Learn D3.js" and "Learn Chart.js". Dataviz consultant, full-stack programmer, teacher, author, software engineer, artist & translator. at Alconost, a company with 76 employees, based in João Pessoa, Paraíba, Brazil. AeroLeads shows a work email signal at argonavis.com.br, phone signal with area code 199, and a matched LinkedIn profile for Helder Da Rocha.

Helder Da Rocha previously worked as Translator (Russian and English to Brazilian Portuguese) at Alconost and Instructor at Developintelligence, A Pluralsight Company. Helder Da Rocha holds Master'S Degree, Computer Science from Universidade Federal De Campina Grande.

Company email context

Email format at Alconost

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{first}@argonavis.com.br
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Profile bio

About Helder Da Rocha

I'm an independent writer & software architect with skills in data visualisation, computer networks, Java & Web programming and software processes. I own a small firm focused on offering services (training, mentoring, consulting, and software development) in those fields, in English and in Brazilian Portuguese. I have written course material about Java, JavaScript, Web Technologies, software design, many of these as a ghostwriter for training companies, but several for my own training services which I make available online (in Portuguese). I have also published books on HTML, CSS and JavaScript (1996-1999, in Portuguese) and recently published two books in English "Learn Chart.js" and "Learn D3.js", in 2019 by Packt. The book on D3 will have a second edition expected for Q1/2025. I currently offer data visualization services and mentoring as an independent consultant, mostly for projects based on D3.js.I also enjoy dedicating part of my time in other fields, especially translation and localization (I regularly translate software documentation, games, applications, and occasionally translate news, articles, literature and theater, in English/Russian to Brazilian Portuguese, and sometimes from Portuguese/Russian to English. I design papercraft toys, board games and wooden puzzles for CNC cutters, and sometimes teach art workshops.I like creating, researching, working on innovative projects (even risky ones), that's why I prefer not to work full-time anywhere. I usually work on project-based contracts for 1-2 (sometimes 3) companies and use the rest of the time to study, write books, invest time in other projects, and play with my kids.Specialties: Java, JavaScript, HTML5, CSS, Web programming, XML, D3.js, teaching, textbook authoring, CAD design, paper engineering (papercraft, pop-up art, karakuri), 2D and 3D modelling, sculpture, paleoart, translation (en->pt_br, pt->en, ru->pt_br and ru->en).

Listed skills include Svg, D3.Js, Data Visualization, Java, and 28 others.

Current workplace

Helder Da Rocha's current company

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Alconost
Alconost
Author of "Learn D3.js" and "Learn Chart.js". Dataviz consultant, full-stack programmer, teacher, author, software engineer, artist & translator.
alexandria, virginia, united states
Website
alconost.com
Employees
76
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12 roles · 30 years

Helder Da Rocha work experience

A career timeline built from the work history available for this profile.

Translator (Russian And English To Brazilian Portuguese)

Current
Alconost

Alexandria, Virginia, United States

Jan 2020 - Present

Owner

Current
Argo Navis

São Paulo, Brazil

SVG and Datavis (D3 + GIS), Java, Web, XML & related technologies, software processes. Services in software development and training.

Jan 2001 - Present

Instructor: Web Technologies (Html5, Css3, Javascript, Less, Svg)

Drc

Taught HTML5, CSS3, SVG and JavaScript Technologies in-house at DRC's clients (Editora Abril) and in regular courses (LESS).

2011 - 2013 ~2 yrs

Consultant

Summa Technologies

Worked with Summa's clients, mostly focusing on problem solving and mentoring in projects involving Java programming, design and architecture of software systems, training of teams, agile software development practices and coaching, quality assurance and code inspection, refactoring, migration, etc.

2007 - 2010 ~3 yrs

Java Instructor

Sun Microsystems (Sun Education)

Taught several Java language courses such as Java for non-programmers (SL110), Java programming (SL275), Web-programming in Java, EJB programming, Java architecture, design patterns, etc.

Jan 1998 - Aug 2007

Role listed

Ibpi

Wrote several textbooks, coordinated and taught several technology courses, with technologies such as HTML, CSS, Java, XML.

1996 - 2001 ~5 yrs

Internet Consultant

Light-Infocon

Helped users who were using the internet though Mandic BBS (Brazil's first ISP provider) which was administered by Light-Infocon; configured networks, investigated internet technologies to be used by clients.

Aug 1995 - Aug 1996

Owner

Infocon Graphics

Developed computer graphics animations, desktop publishing and graphics services, illustration, training in desktop publishing, digital illustration in Corel Draw, Freehand, PhotoShop, etc. Graphics for presentations. Editing of books and text books.

Sep 1989 - Sep 1991
Team & coworkers

Colleagues at Alconost

Other employees you can reach at alconost.com. View company contacts for 76 employees →

NR Nadzeya Roshchyna Nadzeya Roshchyna Colleague at AlconostWarsaw, Mazowieckie, Poland, Poland View → AS Arseni Sinchylin Arseni Sinchylin Colleague at AlconostVilniaus, Lithuania, Lithuania View → KA Kseniya Autukhovich Kseniya Autukhovich Colleague at AlconostBelarus, Belarus View → VM Václav Mička Václav Mička Colleague at AlconostHradec Králové, Hradec Králové, Czechia, Czech Republic View → DO Doaa Omar Doaa Omar Colleague at AlconostEgypt, Egypt View → ET Engin Toker Engin Toker Colleague at AlconostAnkara, Ankara, Türkiye, Turkey View → DY Diana Yaromskaya Diana Yaromskaya Colleague at AlconostErfurt, Thuringia, Germany, Germany View → DB Denis Belevich Denis Belevich Colleague at AlconostTbilisi, Georgia, Georgia View → ER Eugenia Romanenko Eugenia Romanenko Colleague at AlconostPoland, Poland View → DR Dmitry Rasakhatsky Dmitry Rasakhatsky Colleague at AlconostBudva, Montenegro, Montenegro View →
1 education record

Helder Da Rocha education

  • Universidade Federal De Campina Grande
    Universidade Federal De Campina Grande
    Computer Science
FAQ

Frequently asked questions about Helder Da Rocha

Quick answers generated from the profile data available on this page.

What company does Helder Da Rocha work for?

Helder Da Rocha works for Alconost.

What is Helder Da Rocha's role at Alconost?

Helder Da Rocha is listed as Author of "Learn D3.js" and "Learn Chart.js". Dataviz consultant, full-stack programmer, teacher, author, software engineer, artist & translator. at Alconost.

What is Helder Da Rocha's email address?

AeroLeads has found 1 work email signal at @argonavis.com.br for Helder Da Rocha at Alconost.

What is Helder Da Rocha's phone number?

AeroLeads has found 2 phone signal(s) with area code 199 for Helder Da Rocha at Alconost.

Where is Helder Da Rocha based?

Helder Da Rocha is based in João Pessoa, Paraíba, Brazil while working with Alconost.

What companies has Helder Da Rocha worked for?

Helder Da Rocha has worked for Alconost, Developintelligence, A Pluralsight Company, Sescsp/Br - Social Service Of Commerce, Summa Technologies Do Brasil Ltda, and Argo Navis.

Who are Helder Da Rocha's colleagues at Alconost?

Helder Da Rocha's colleagues at Alconost include Nadzeya Roshchyna, Arseni Sinchylin, Kseniya Autukhovich, Václav Mička, and Doaa Omar.

How can I contact Helder Da Rocha?

You can use AeroLeads to view verified contact signals for Helder Da Rocha at Alconost, including work email, phone, and LinkedIn data when available.

What schools did Helder Da Rocha attend?

Helder Da Rocha holds Master'S Degree, Computer Science from Universidade Federal De Campina Grande.

What skills is Helder Da Rocha known for?

Helder Da Rocha is listed with skills including Svg, D3.Js, Data Visualization, Java, Xml, Software Development, Javascript, and Css.

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