David Havl

Software Engineer with 19 years of experience,
based In London, United Kingdom

Contact Me
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    Software Development

    Specialized in end-to-end development of complex business applications, primarily utilising Typescript/Javascript, Node.js, PHP and C#. Particularly passionate about backend, API and application development.

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    Software Architecture

    Highly proficient in design and architecture of performant, scalable and secure applications that withstand the test of time. From infrastructure planning, detailed technology choices, through fine tuned business logic details to a deployment.

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    Dedicated Support

    Thanks to my extensive experience and expertise with large scale sites and applications, I can provide full dedicated support to your team on existing projects or help with bug fixes or infrastructure enhancements.

About Me

A Passionate Developer Who Loves Challenging Problems

About
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19

Successful
Years

About Me

Passionate Software Engineer, with 19 years of experience in building commercial projects, complex business-level applications, mobile applications and back-end systems from the ground up.
Primary focus on Typescript/Javascript, Node.js, Vue, PHP and C#.
I am what you call an end-to-end developer, well-rounded in most of the software development lifecycle, and particularly passionate about backend, API and mobile application development.
Over the years, I have had the privilege of working with clients from various business sectors, including education, government, B2B, hospitality, medicine, research and more.
I enjoy continuous learning, and embracing new techniques and technologies to turn creative ideas into reality.

    • Address

      London, UK or Malaga, Spain

    • Degree

      Bachelor in CS

    • Freelance/Contractor

      Available

Download CV

  • 19

    Years Experience

  • 28

    Direct Clients

  • 34

    Large Digital Products
Resume

Professional Experience

  • Software Engineer (2005 - Present)

    Independent/Contractor

    Full-time independent contractor/freelance web application developer, building commercial projects and complex business-level web applications. Working with clients from different sectors directly or through agencies. Accountable for the full cycle of development and management of projects from initial client consultation through to planning, design, front and back-end development and delivery, ensuring all client specifications are achieved.

  • Desktop Software Developer (2002 - 2005)

    Contractor

    Independent software developer utilising C++, C#, .NET, Winforms, creating desktop applications for variety of business sectors.

Skills

I Constantly Learn and Work Hard to Improve My Skills

HTML, CSS100%
Typescript/Javascript100%
Node.js (Express, Nest.js, Fastify, Hono)100%
Vue100%
React, Angular50%
Databases (MySQL, PostgreSQL, MongoDB)100%
APIs (REST, Graphql)100%
PHP (Symfony, ZF, Laravel)95%
Server/Serverless (AWS, Cloudflare, Azure)90%
Design (Figma, Photoshop)60%

Spoken Languages

English100%
Czech80%
Spanish50%
Portfolio

Some of My Interesting Projects

On majority of following projects I have worked as a solo or lead developer.

  • InnerView (2018 - 2024)

    Number one volunteering and service tracking platform (and mobile APP) in the USA

  • StudyHall (2020-2022)

    Online interactive education/support platform for elementary students in the US

  • eVillageUS (2015-2017)

    Medical and market research platform for leading US medical group

  • GearJot (2015)

    Collaborative fleet management system

  • Darwin Network (2014)

    Collaborative and communication network for businesses

  • Equine Register (2014)

    UK Government sanctioned platform for registration of equines

  • my.towerhamlets (2012)

    An integrated news, consultation and survey system for London borough of Tower Hamlets.
Testimonials

What Clients Say

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    You are such a wonderful team member. You are talented and compassionate - thanks for always thinking ahead of more ways to help!.

    Kristine Sturgeon

    Innerview Technologies

  • Over the last 2 years, since we enquired David's services, our user base has grown by 800% but our application runs as fast and smooth as on the beginning. We have to say we are so happy we have chosen this guy.

    Ian Grae

    Realmotocross inc

  • David is top notch. His professionalism, creativity and skills are so rare to find. He has delivered quality product beyond my expectations.

    Michael Charter

    Darwin ltd.

  • Thank you David, the admin panel as well as the actual app is superbly designed, intuitive and most importantly works without a single glitch. We have already started using it and got our first hundred happy customers.

    Anselmo Fernandez Vizcaino

    Take a Wine
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