Luís Martinho, Python Developer in Porto, Portugal
Luís Martinho

Python Developer in Porto, Portugal

Member since July 30, 2012
As an entrepreneur, Luís understands the importance of proactivity and results, and has learned the meaning of responsibility and accountability. He is more of a generalist than a specialist, though he loves the detail and deep understanding that comes from intense focus and work on development projects.
Luís is now available for hire




Porto, Portugal



Preferred Environment

Subversion (SVN), Git, PyDev, Eclipse

The most amazing...

...piece of software I have ever built is a P2P lending website, built from scratch and integrating multiple technologies.


  • Senior JavaScript Developer

    2013 - PRESENT
    Tynker (via Toptal)
    • Created an affiliate tracking system using PHP and MongoDB. Created a coupon management system, and integrated with the affiliation.
    • Reworked purchase flow as a multi-step funnel, with a role-dependent experience and multiple possible entry points. Used Stripe API.
    • Modernized existing PHP application extracting presentation logic and introducing layouts and unit tests using PHPUnit and Composer.
    • Implemented Optimizely for A/B testing.
    • Engaged with multiple marketing-driven projects with very short turnaround in a near-continuous deployment environment.
    Technologies: MongoDB, Sass, Git, PHP, JavaScript
  • Front-end Developer

    2013 - 2013
    TST Media Inc. (via Toptal)
    • Created a live sports scoring single-page application.
    • Added new features to a client-side heavy, real-time web and mobile application.
    Technologies: Ruby on Rails (RoR), Knockout (Knockout.js), JavaScript
  • Front-end Developer

    2012 - 2012
    Neuron Fuel Inc. (via Toptal)
    • Developed a graphics painting application for the web (similar to MS Paint).
    • Used the HTML5 canvas element to work on a graphics editor, extending the basic feature set with advanced features such as oval pen, 2D transforms, selection tools, cropping, etc.
    Technologies: jQuery, JavaScript, HTML5 Canvas
  • Back-end Developer

    2012 - 2012
    Idle Games (via Toptal)
    • Coded an administration tool for a social gaming title, leveraging and pushing the envelope on the Django admin (identified and fixed breaking points).
    • Developed new generic views for reporting in Django and efficient retrieval of large datasets from Mongo DB.
    • Created business critical APIs directly impacting monetization and game server operation.
    • Handled performance sensitive work and was capable of handling a large scale operation.
    • Implemented TDD and extensive unit-test coverage.
    Technologies: jQuery, JavaScript, MongoDB, Django
  • Software Developer

    2008 - 2012
    Hive Solutions
    • Developed core technology for a company-sponsored Colony Framework open source project (featuring full-text search and UI widget library adapter).
    • Developed back-end logic in Python, using Colony Framework and its MVC stack for an online invoicing solution.
    • Used MySQL GIS functions to handle location-based search on a large knowledge base.
    • Developed a stock management tool in C# and integrated it with Microsoft Excel.
    Technologies: Colony Framework, Django, jQuery, JavaScript, Python
  • Front-end Developer

    2011 - 2011
    RotoReality (via Toptal)
    • Developed the Django templates for a Fantasy Sports web application.
    • Worked extensively on the front-end doing everything from slicing the initial PNG mockups to creating the HTML and CSS and writing the actual Django templates.
    • Assisted the team in the back-end and created client-side UX improvements, using jQuery and JavaScript.
    Technologies: jQuery, JavaScript, CSS, HTML, Django
  • Project Promoter, Lead Developer

    2007 - 2009 Project
    • Developed and launched a crowdfunding platform focused on Peer-To-Peer Loans.
    • Kicked-off a private beta with friends and family with real cash and loans.
    • Wrote a simple yet very effective loan matching system in Prolog to support the platform operation.
    • Wrote MSc thesis on “Combining Loan Requests and Investment Offers in Peer-To-Peer Lending”, and eventually presented the work in Intelligent Agents and Technologies for e-Business (IAT4EB) workshop in European Conference on Artificial Intelligence (ECAI) 2010.
    • Failed to obtain regulatory clearance in Portugal, but assembled a team with the required skills and handed over the project.
    Technologies: Prolog, Active Merchant, Ruby on Rails (RoR)
  • Support Engineer

    2007 - 2008
    Enabler Wipro
    • Handled third-line support (specialist level) for bespoke systems used by the Pricing Team of the Marketing Department of the largest retailer in Portugal (€5 billion revenue).
    • Implemented functions including everything from getting the bug report from the second-line of support, performing test case reduction, analyzing a substantial quantity of legacy code and complex integration flows, diagnosing the problem, and implementing a solution that effectively fixed it in production.
    • Assumed effective responsibility for the system as whole and performed training of new staff.
    Technologies: OLAP, AIX, KornShell, PL/SQL, Oracle
  • Software Developer

    2007 - 2008
    Enabler Wipro
    • Developed custom reports for the competitive intelligence team of a big retailer.
    • Interfaced with the price benchmarking team to identify the business needs for the reports.
    • Handled performance optimization for a series of existing reports using Oracle DBMS proprietary features.
    Technologies: SAP BusinessObjects (BO), PL/SQL, Oracle
  • Integration Developer

    2007 - 2008
    Enabler Wipro
    • Developed an integration flow for one of the largest retailers in the world (£60 billion).
    • Customized an Oracle Retail Pricing Management solution, a Java EE stack, to operate with one of the company’s master data management systems.
    • Worked in the clients’ offices in the UK and traveled to Bangalore for knowledge transfer and training in the clients’ offshore development center.
    Technologies: Java EE, PL/SQL, Oracle


  • Yellow Page Mobile Application

    I developed a location aware mobile application for a multinational yellow page directory in Europe.
    I used Qt Quick for quick time-to-market in the early stages of development. I created C++ extensions whenever necessary to extensively customize existing behavior. Technologies used include C++, Qt, Qt Quick, Qt Mobility, and Symbian.

  • Web Platform

    I implemented user action tracking and a simple analytics system for, a social network for children.
    I developed new classroom management features for the educational system. Technologies used include Ruby and Ruby on Rails.

  • Frontdoor POS

    Frontdoor is an online cash-register that tries to make ringing up sales and managing inventory simple and fun. I assumed roles ranging from Product Manager to QA Engineer to Sales.
    I handled testing and bug fixing and also developed support for internationalization in the application. Technologies used include Python, JavaScript, Colony Framework.

  • À La Carte

    I developed the back-end logic for a food indexing and search system in Python. I also developed the front-end logic for the system in HTML5 and JavaScript. I used MySQL GIS functions to handle location based search on a large knowledge base. Technologies used include Python, JavaScript, and MySQL.

  • From Node.js to Paying Your Freelance Taxes: Interview with a Successful Developer (Publication)
    At Toptal, we’re always looking for the best freelancers around. But what makes a freelancer truly great? Luis Martinho, one of our top developers, is beloved by his clients — so we sat down with him to talk about freelancing, technologies, and paying your taxes.


  • Languages

    Python, HTML5, Go, C#, PHP, JavaScript, Ruby, Java, HTML, CSS, Prolog, Sass, QML, Objective-C
  • Frameworks

    Django, WebObjects, Pylons, .NET, Ruby on Rails (RoR), Colony Framework, Knockout (Knockout.js), Qt Quick, Qt
  • Libraries/APIs

    jQuery, React, OpenGL, Vue, Active Merchant, HTML5 Canvas, jQuery UI
  • Tools

    Eclipse IDE, VMware, Git, PyDev, Subversion (SVN)
  • Paradigms

    Test Automation, Mobile Development, Test-driven Development (TDD), OLAP
  • Platforms

    WordPress, Shopify, Oracle, Java EE, KornShell, AIX, Eclipse, iOS, Android
  • Other

    Architecture, Web Development, Software Development, Mobile App Development, Front-end Development, CubicWeb, Artificial Intelligence (AI), Mobile Apps, Test Engineer, TextSearch, SAP BusinessObjects (BO), BitTorrent
  • Storage

    PL/SQL, MongoDB


  • Master of Science in Informatics and Computing Engineering
    2002 - 2007
    Faculdade de Engenharia da Universidade do Porto - Porto, Portugal

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