Untitled-javascript-consultant

Hi, my name is Andrej Gajdos

I’m a JavaScript consultant for hire

JavaScript consultant for hire | Andrej Gajdos
JavaScript consultant for hire | Andrej Gajdos
apple logo binance logo bankrate logo kettle logo adaptwordwide logo a.teams logo toptal logo nash logo shipserv logo shipbuilder logo stackbit logo ataccama logo 3icap logo ctrl logo

WHICH STATEMENT BEST DESCRIBES YOU?

I need help with my existing JavaScript project.
  • Struggling with poor performance and sluggish user interfaces?
  • Facing challenges with technical debt or incomplete features?
  • Unsure how to streamline your development process?
  • Need expertise in resolving bugs and implementing best practices?
I am going to build new JavaScript project.
  • Unsure which JavaScript framework best suits your needs?
  • Need a scalable and maintainable architecture from the start?
  • Want to leverage existing tools to reduce development time?
  • Looking for guidance on hiring the right talent?
Get an advice from JavaScript consultant. SEE MORE

WHY ME?

With over a decade of experience specializing in JavaScript, I bring:

  • Proven Expertise: Mastery of frameworks like React, Node.js
  • Strategic Vision: Guidance on development roadmaps and architectural decisions.
  • Scalable Solutions: Building applications that grow with your business needs.
  • Practical Insights: Focused on delivering fast, maintainable, and efficient code.

Check out my portfolio for examples of transformative projects I’ve led.

[email protected]

JAVASCRIPT CONSULTING SERVICES TAILORED TO YOUR NEEDS

Code Reviews and Strategic Guidance

Regular code reviews and meetings with your team to ensure that your JavaScript project is well structured. Code quality is underestimated and it’s one of the most important aspects in software development. I have came across too many broken Javascript projects. Founders, even CTOs don’t know their projects are broken. When they figure it out, they are looking for JavaScript experts, but it’s too late because technical debt is too big. Poor code structure:

  • Delays releasing your MVP for months and significantly slow down development
  • Cost you at least six figures, because you need to throw your project away and build it from scratch.

I will provide examples, pseudo-code and snippets to show your team how to structure the code and solve specific scenarios. Minimum price is $4,800/month.

Part-time development

If you feel like you need my help every day or every second day around 20-25 hours/week. I can be actively involved in the development process. I can help senior developers on daily basis with best practices, design patterns and tooling to scale JavaScript projects.

Full-time development

I can commit full-time 40 hours/week. I enjoy development in JavaScript and working with talented teams.

Others

Do you need a one time code review or anything else? I can go through your project quickly and produce a report with recommendations. One-time code assessments start at $1,500 and include a detailed report with actionable recommendations. Your satisfaction is guaranteed, or you’ll receive a full refund.

WORK

React Project | Developer Portfolio Item
Apple ***

Web portal in React.js, which allows Apple ***

DEVELOPMENT TOOLS
  • React
  • Framer Motion
Website builder platform in React | Portfolio Item
Stackbit

Stackbit is a website builder that helps developers of any level to build their own Jamstack sites based on Next.js and Tailwind, fast. I helped Stackbit’s team to set up the tooling and design the architecture for design system of the main platform. I helped and mentored senior React developers best practices and what patterns to use to solve complex flows in React projects. I was working on fixing various issues and bugs in the platform. I was working on additional feature sets for enterprise clients. I worked as a full-stack developer in React.js, Node.js and MongoDB with focus on front-end development.

DEVELOPMENT TOOLS
  • React
  • Node.js
  • MongoDB
  • Typescript
View project →
Frontend Technology Lead | Portfolio Item
Meridian

Meridian provides next-gen, AI-powered workflow tools to private investors. As a Frontend Technical Lead, my responsibility was not just to manage but also to inspire and guide the front-end team through the intricacies of front-end development. One of my significant contributions was collaborating closely with the Product Designer. Together, we crafted a UI design system that was not just visually appealing but also intuitive and user-centric. This system became the cornerstone of the user experience, embodying the essence of Meridian’s innovative approach. I built the MVP from scratch and set up CI pipeline for Meridian’s UI.

DEVELOPMENT TOOLS
  • React
  • Storybook
  • Typescript
View project →
Next.js Project | Portfolio Item
Ouro Better Credit

Ouro aimed to transform financial services with the launch of Better Credit, a cutting-edge web app designed to empower users to improve their credit scores. The platform combines a flexible credit line with an intuitive web wallet, offering users a seamless and user-friendly experience. In this project, I spearheaded the development of the web app, leveraging React, Next.js, and TypeScript to build a robust and scalable user interface.

DEVELOPMENT TOOLS
  • Next.js
  • React
  • Typescript
View project →
Leaflet.js developer | Portfolio Item
Burro

Burro, a leader in autonomous, collaborative farming robots, enhances agricultural productivity by automating tasks such as load carrying and field navigation. To support their innovative technology, I developed an interactive web application that enables Burro’s customers to efficiently create and manage routes for their autonomous robots. The application features an intuitive map interface built with Leaflet.js, allowing users to draw, edit, and visualize custom routes, as well as a dynamic tree view structure for organizing and managing route data. By integrating seamlessly with Burro’s backend systems, the solution streamlined route management processes, offering customers a user-friendly tool to enhance their workflows and productivity.

DEVELOPMENT TOOLS
  • React
  • Leaflet.js
  • Node.js
SEE MORE

CLIENT SUCCESS STORIES

Andrej worked with our team to develop a rather complex web application using React. He joined us at a critical stage in the development process and was instrumental in guiding our team to adopt best practices for React and helping us implement more modular code.

We found Andrej to be very professional, a skilled and efficient programmer, and enjoyable to work with. He easily integrated with the rest of our team and was productive from day one. We would happily hire Andrej to work with us again.

Peter Ellis, President at Big Ladder Software

Andrej worked with Adapt Worldwide in 2019, developing multiple React widgets for a major marketing campaign. Andrej exceeded our expectations beyond measure through his skill and dedication.

Communication with Andrej was fluid and uncomplicated, and he always went above and beyond to not only ensure the project was promptly delivered, but that it was done so to an immaculate standard. His insight and experience was hugely valuable to the project; Andrej truly helped us shape our vision and reach our goals with strong execution.

I would highly recommend Andrej as an exceptional React developer who is completely dedicated to producing quality, functional, engaging content. It would be an absolute pleasure to work with Andrej again in the future.

Michael de Alwis, Creative Content Executive at Adapt Worldwide

Andrej was a key contributor to a complex, critical React web application. His work is timely and thoughtful, and he’s a great communicator and team player. We hope to work with him again soon.

Jacob Budin, Development Manager at Kettle

After working with over a dozen developers from several different countries, it was absolutely refreshing to have had the pleasure to work with Andrej in building a full stack, dynamic web app.

Andrej has all of the required technical expertise that one could hope for when it comes to building a highly scalable and dynamic website. For me, this meant taking designs from an early stage and building the entire front and back end of the project, release ready.

He also exhibits a particular pride in his attention to detail (a trait which had been hard to find previously). This meant that after giving Andrej direction, you can always be confident that the code will be delivered exactly as required. Equally in my experiences, If Andrej see’s a better method, he will always suggest it, helping us end up with the best product possible.

All in all, Andrej was indispensable to our team and certainly one of the best developers that I have had the pleasure to work with.

Marcus Scott, Founder and Director of SayCaster (rebranded to Bitcast)

I had the pleasure of managing Andrej for about 1 year at Zeroturnaround. His natural ability to recognize deficiencies and address them made him an immediate asset to the team and the company.

Andrej would regularly think of different ways to provide our clients with the best grasp of the benefits that our tools offered. This allowed him to grow in respect from our clients and his co-workers. Andrej was a pleasure to work with and is always looking for ways to provide himself with personal growth.

Andrej also is an excellent orator. His clear and concise voice allowed customers to feel comfortable working with him and collaborating with him. This lead to his sales team being able to close many deals that they were previously unable to close.

I would love to be able to work with Andrej again someday and comes with my highest of recommendations.

Curtis Johnson, Sales Engineering Manager at ZeroTurnaround (acquired by Rogue Wave Software)

Andrej was a great help in creating a vision and front-end prototype for our startup. I have very little technical knowledge, and he was so knowledgeable in finding us technologies that would work for our needs. He is very professional, friendly, honest, and his communication is excellent. I highly recommend Andrej!

Carlene Takaki, Professional Swim Coach at Palo Alto Stanford Aquatics
I TAKE YOUR BUSINESS TO THE NEXT LEVEL BRING YOUR IDEAS TO REALITY LIFE TURN COMPLEX WEB APPLICATIONS INTO BEAUTIFUL EXPERIENCES TACKLE TECHNICAL CHALLENGES QUICKLY AND EFFECTIVELY
React.js Apps I have delivered Javascript projects as a solo developer or as a team member of remote developer teams across different time zones. I have built Javascript projects from scratch or fixing JavaScript projects with broken code structure. With over 10 years of experience with Javascript in different industries I know how to structure complex Javascript projects.
Design Systems I’m UI oriented and that’s the reason why I specialize in Javascript. I enjoy building design systems. I have a lot of experience in developing animations and css development. I know how to build complex design system easily and fast without UI frameworks.
Data Visualizations I have built various dashboards and data visualizations in Javascript. I have experience in building data visualizations in D3.js and mapping functionalities in Mapbox and Leaflet. I have worked on data management products, exchange platforms and dashboards for portfolio management.

SELECTED ARTICLES

A Leaflet Developer’s Guide to High-Performance Map Visualizations in React

Are you gearing up to create a map visualisation that handles a large dataset? I’m excited to guide you through the process of crafting interactive map visualizations while sidestepping pitfalls. Drawing from my experience as a freelance React and Leaflet developer, I encountered diverse requirements for map visualizations—rendering extensive datasets, creating interactive visuals, and managing the drawing of various shapes.

React Class Components vs Functional Components with Hooks: A Never Ending Story

A lot of developer teams choose to use React class components instead of functional components with hooks for the wrong reason. To me, it’s surprising to see this discussion over and over again. React released hooks over two years ago, it’s a proven approach and many developers are still not sure if it’s a good idea to use them or not.

CSS Reset for better Flexbox and CSS Grid responsive layout

This is a CSS Reset for Flexbox and CSS Grid which helps you to avoid issues in responsive layouts. It is one simple CSS rule which I noticed in a UI framework. There aren’t any odd consequences and I wish it was by default in all browsers. In case you don’t know about css normalizers and css resets, you can check this blog post. Most of them don’t solve flexbox issues.

Single-Page Application vs Multiple-Page Application: Which One To Choose For Your Project

In this post I’m going to break down EVERYTHING about single-page application vs multiple-page application. So if you are looking for a DEEP comparison of these two types of web applications or websites, you’ve come to the right place. In this post, you will learn which projects are better to develop as a single-page application (SPA) or multiple-page application (MPA). You will see what single-page applications have in common as well as multiple-page applications and how to improve them.

Freelance React Developer’s Checklist

Whether you are a freelance React developer or you do another kind of freelance work on short term projects, you can recognize similar patterns in your workflow. I found similar patterns in process of building React.js projects. In almost every project, I need to ask for clarification or similar questions in regards to graphic design. This checklist is not only for freelance React developers, but it can be helpful for others who work closely with developers, such as project managers or graphic designers. I use this checklist before starting building the project and after agreement with client.

Orchestrating animations with Framer Motion in React.js

Framer Motion is an open-source motion library, which drives Framer X’s animations and gesture capabilities in React.js projects. If you are familiar with Popmotion, Framer Motion is the successor to the popular Pose animation library. Both libraries provide declarative API, which makes creating and orchestrating animations in React.js projects easy to implement.
VISIT THE BLOG

LOOKING FOR A JAVASCRIPT CONSULTANT FOR HIRE? LET’S BUILD SOMETHING.

Whether you’re optimizing an existing project or starting from scratch, I’m here to provide the expertise you need. Contact me today, and let’s discuss how I can help your team succeed.

    What type of project do you need completed?

    This will help me understand the basic needs of your project and set the right budget and timeline expectations.

    Which services do you need?

    Please specify the type level of completion you'd like me to deliver on this project.

    Ongoing advicePart-time developmentFull-time developmentOne-time assessmentOther

    What's the budget for your project?

    This will help me guide you toward the most appropriate solution within your budget. Consider this a starting point to our conversation, not a final quote.

    When do you need this project completed?

    Select the option that best expresses your expectations for the timeline of this project.

    Email
    [email protected]
    Connect