Sigfried Gold

Sigfried Gold

Washington, United States
Hire Sigfried
Scroll To View More
Sigfried Gold

Sigfried Gold

Washington, United States
Member since September 8, 2014
Sigfried is a bright and articulate full-stack developer who creates browser-based visual analytics tools to facilitate the exploration of complex, multivariate, or temporal data. He has Master's degrees in Creative Writing and Medical Informatics. He has published numerous papers and articles and has won multiple "best paper" awards.
Sigfried is now available for hire
  • SQL, 20 years
  • JavaScript, 17 years
  • Perl, 10 years
  • Python, 6 years
  • Functional Programming, 5 years
  • D3.js, 5 years
  • React.js, 1 year
  • EcmaScript 2015 (ES6), 1 year
Washington, United States
Preferred Environment
Javascript, D3.js, Python, Open source
The most amazing...
...tool I've built and open-sourced is: for super quick exploration of data and structure in CSV files.
  • Research Programmer
    Invincea Labs DARPA-Funded Cybergenome Project (via Zachary Piper)
    2014 - 2014
    • Created complex, highly interactive tools for exploring and finding meaningful relationships in large collections of malware binaries.
    • Created interactive network diagrams effectively showing similarity relationships across dozens of data dimensions and affording fast and powerful selection, filtering, highlighting, and zooming features.
    Technologies: Angular.js, D3.js, Python, MongoDB, Elasticsearch, Sigma.js
  • Information Visualization Architect and Developer
    Social & Scientific Systems
    2011 - 2014
    • Designed static and interactive information visualization displays for scientific and operational data in the context of large clinical trials research.
    • Created a multi-level, dynamically configurable heatmap/barchart visualization that allowed for the display and interactive exploration of data previously presented in 4000 pages of Excel charts on a single HTML page.
    Technologies: Javascript, D3.js, lodash.js, Jasmine, Zend, R
  • Senior Systems Consultant
    2008 - 2011
    • Was the principal investigator on a $100,000 external research grant collaborating with Ben Shneiderman and others of the University of Maryland’s Human-Computer Interaction Lab through developing novel methods for temporal summary and visualization of drug exposure and medical event data (See
    • Presented innovative work on the representation and comprehension of complex drug utilization patterns in prescription and dispensing data (See
    • Worked with a DoD TRICARE data warehouse of 12 million patient medical records. Developed novel information visualization methods for discovering clinical patterns across thousands of timelines of longitudinal patient data.
    • Designed and prototyped research software for discovering and validating drug safety signals in longitudinal healthcare data.
    • Wrote research proposals and results for academic publications and grant funding. Provided informatics expertise on managing data mining applications using various medical coding systems and classifications.
    Technologies: JavaScript, Java, Oracle 11g, ICD-9-CM, RxNorm, AHFS, FirstDataBank NDDF, LOINC, MedDRA, UMLS
  • Systems Analyst
    Columbia University Medical Center
    2003 - 2008
    • Built New York City-wide NICU quality assurance data collection and analysis application in collaboration with researchers, neonatologists, and administrators at the New York Presbyterian Hospital Regional Perinatal Centers.
    • Designed and built a highly interactive intranet communications platform supporting the 50-person CUMC Office of Development.
    • Designed and built a major gifts reporting platform aiding 50 development professionals in raising $150 million per year.
    • Built hazardous materials tracking and verification system supporting safety assurance for labs and research facilities across Columbia University.
    Technologies: Perl, JavaScript, MySQL
  • Founder, President, CTO
    Pixo (formerly OJC Technologies)
    1998 - 2003
    • Led all aspects of soliciting and executing contracts: identified opportunities, made cold calls, did technical sales, wrote proposals, gathered requirements, staffed projects, designed solutions, wrote use-cases, ERDs, wire frames, and managed implementation, testing, delivery, and client training.
    • Managed significant projects for dozens of clients including UIUC/EvaluationOnline, Morgan Stanley Dean Witter, Imagine Media/Daily Radar, MortgageSelector, Trimark Securities, United States Geological Survey, Stats Inc., Fitch IBCA Duff & Phelps, McGraw-Hill, Illinois Department of Children and Family Services, Illinois Math and Science Academy, Music Browser Inc., Provena Covenant Medical Center, and
    • Grew the company from two employees to twenty in two years. Pixo (See remains the leading web application development firm in Champaign-Urbana, Illinois, providing services to many departments and offices of the University of Illinois as well as a local and national clientele of businesses and non-profit organizations.
    Technologies: Perl, JavaScript, Oracle, MySQL, PostgreSQL
  • Programmer
    Tradetech Securities
    1995 - 1998
    • Built multiple integrated reporting systems for a third market trading firm. Dynamic reports analyzed the firm's trading data to track order-flow, profitability, and regulation compliance.
    Technologies: Perl, Visual Basic, SQL Server
  • Programmer
    Multiple clients (William M. Mercer, Inc., Sybase, Allstate Insurance Company, Holleb & Coff, Metropolitan Life Insurance Company, Dean Witter Reynolds, Victim Services Agency)
    1986 - 1995
    • Built a domestic violence client/services tracking application connected to New York City's 911 caller system.
    • Worked on mortgage-backed securities trading system.
    Technologies: C/C++, Sybase, AOS/VS, Xenix, dBaseIII+, and a host of others
  • Open source visualization tool (Other amazing things)

    An experimental tool allowing rapid exploration of the contents and inter-relationships across the columns of spreadsheet or CSV data. Written in JavaScript and D3.js.

  • Experimental, browser-based temporal summary visualization tool (Other amazing things)

    Proof of concept for a browser-based implementation of Krist Wongsuphasawat's LifeFlow ( using D3.js.

  • Cynomix malware visualization tool (Development)

    Built key elements, including the network visualization diagram and much of the API logic for complex search.

  • GitHub projects (Other amazing things)

    Documentation of my open-source projects on GitHub

  • Ultimate In-memory Data Collection Manipulation with Supergroup.js (Publication)
    In-memory data collection manipulation is something that we often need to do in data-centric reporting and visualization applications. When needed, we often tend to resort to complex loops, list comprehensions, and other suboptimal means, which can easily end up being a huge mess of hard-to-maintain spaghetti code. Supergroup.js is an in-memory data manipulation library that can be used to solve some common data manipulation challenges on limited datasets.
  • Sigfried is a mentor in the Toptal Global Mentor’s Program. This program is a partnership between Toptal and General Assembly to provide high quality mentorship for students from minority and low income backgrounds who are looking to begin their careers as professional software engineers. Sigfried shows commitment to diversity in tech by mentoring a General Assembly student every week for a year, covering everything from coding tips and tricks to advice on making it in the industry.
  • Languages
    SQL, HTML5, HTML, Perl, Stored Procedure, JavaScript, Bash, C/C++, ES7, Python, CSS, EcmaScript 2015 (ES6), SASS, R
  • Libraries/APIs
    D3.js, Underscore.js, Lodash, React.js, Sigma.js, Node.js, jQuery, Jasmine-jQuery, RequireJS
  • Tools
    Vim Text Editor, Bower, NPM, Apache, Browserify, GitLab, Microsoft Excel, Git, Grunt, Webpack
  • Paradigms
    Object-oriented Design (OOD), API Architecture, Object-oriented Programming (OOP), REST, Procedural programming, Functional Programming, Agile Software Development
  • Platforms
    Linux, Unix, Mac OS X
  • Storage
    Oracle 11g, Oracle PL/SQL, Sybase, MongoDB, PostgreSQL, MySQL, SQL Server
  • Misc
    Requirements & Specifications, Architecture, Data Visualization, Visualization, Front-end Architecture, Software Architecture, User Requirements, Technical Project Management, Regular Expressions, Unix Shell Scripting, SVG, Project Management, Elasticsearch, SVG animation, Tornado, MedDRA, UMLS, ICD-9-CM
  • Frameworks
    Bootstrap, AngularJS, Flask, Mocha, Jasmine
  • Master of Arts degree in Medical Informatics
    Columbia University - New York
    2005 - 2008
  • Master of Fine Arts degree in Creative Writing
    Sarah Lawrence College - New York
    1984 - 1987
I really like this profile
Share it with others