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Toptal is a marketplace for top remote software developers. Top companies and start-ups in London choose Toptal Software Developers freelancers for their mission-critical initiatives.

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Daniel Nenkov

Freelance Software Developer

Daniel is adept at digging into complex problems to find innovative solutions that benefit both the company and their clients. Most recently, he has created a digital challenger bank for SMEs, led a team that changed the way people apply for divorce in the UK, and created an award-winning multi-factor authentication platform that was featured in Tech Crunch and WSJ. He's looking forward to tackling his next challenge.

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Software DevelopersJavaSpringSpring BootGitAgileWebSpring Data REST
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Vu Nam Nguyen

Freelance Software Developer

Vu Nam is a software engineer with experience working with Fortune 500 and tech-focused companies. He's creative with a high standard of technical implementation—specializing exclusively in full-stack roles in greenfield projects to work with the latest tech. His most used tech stack is React, Redux, TypeScript, RxJS, GraphQL, Node.js, PostgreSQL, Koa, Docker, and AWS. This stack enables him to build things the right way—thoroughly and quickly.

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Software DevelopersJavaScriptTypeScriptReact
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John Lazar

Freelance Software Developer

John is a senior quant developer who’s worked the full development lifecycle of various applications. He’s proficient in several languages—C++, C#, Java, Python, R, to name a few—across Windows and Linux. The types of projects where John excels are advising and implementing in-house cloud distributions of the heavy-load operations combined with continuous integration and deployment (Linux, DevOps packages).

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Software DevelopersC#C++Linux*nux ShellsAlgorithmic TradingPython
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Iliyan Zarov

Freelance Software Developer

Iliyan is a machine learning engineer and full-stack developer with a decade of experience. He is a co-founder of an AI health-tech company backed by Europe's most prestigious accelerator. Iliyan was previously lead research engineer in the AI Research team at Babylon Health, building and scaling up the AI doctor to millions of users. Before that, he made a massively scalable distributed computing platform and worked as a quant at a hedge fund.

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Software DevelopersPythonClojureC++GoCAWS EC2 APIAWS EC2AWS S3DockerJuliaReact NativeFlask
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Andrei Cioara

Freelance Software Developer

As an engineer, Andrei enjoys making software run as fast as the hardware allows. Holding a master of engineering degree from Imperial College London, Andrei excelled in his studies and graduated with a first class honors distinction. Andrei has previously worked at Microsoft, Palantir Technologies, Citadel Securities, and Jump Trading.

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Software DevelopersPythonPython 3Python 2JavaScriptJavaScript 6JavaScript 5C++C++11JavaHTML5CSSCSS3
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James Cater

Freelance Software Developer

James is a developer with 20 years in the banking sector delivering multi-tier global systems across enterprises. With extensive experience in front/middle office as well as software start-ups, he's a hands-on professional with deep technology experience across system design and programming. He enjoys working on complex systems without compromising performance.

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Software DevelopersC#Visual StudioWindows
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Richard Gill

Freelance Software Developer

Richard is a senior full-stack JavaScript engineer. He specializes in React Native, React, Node.js with JavaScript, and Elixir (OTP). In his career, Richard has built and delivered over 20 React and React Native-based apps.

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Software DevelopersJavaScriptReact NativeReactNode.jsCross-platformJavaC#RubyPythonRuby on Rails (RoR)
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James Freiwirth

Freelance Software Developer

James has over 14 years experience building software in industry. He is a great problem-solver and can apply himself to many different domains. He can gather requirements and design, build, and test complete systems from beginning to end whilst communicating effectively with the business. He believes in using the latest tools and techniques to perfect his craft whilst never losing sight of the goal: delivering business value for the client.

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Software DevelopersF#C#JavaScriptVisual Studio 2013Test-driven Development (TDD).NETSaaSDevOpsAzure
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Sebastian Durandeu

Freelance Software Developer

Sebastian is a full-stack software engineer with a primary focus on building web applications and services for the cloud using Microsoft technologies. For 10+ years, he has helped build custom software solutions for multiple Fortune 500 companies (Microsoft, GSK, and others). He believes his strengths are his attention to detail and best practices, together with very strong communication and reporting skills.

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Software DevelopersC#Scrum.NETAgile Software DevelopmentContinuous DeploymentMicrosoft Visual StudioAzureASP.NET MVCASP.NET Web APIAzure WebsitesShopify
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Devin Barry

Freelance Software Developer

Devin is an experienced application developer with a particular focus on web applications. His strengths are with Python using the Django framework and with front-end development using JavaScript/Angular. Devin is trained as an embedded systems engineer and also enjoys embedded Linux and C/C++ projects.

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Software DevelopersPythonJavaScriptTypeScriptCSSHTML5CSS3DjangoGitAjaxMySQLDjango REST FrameworkPostgreSQL

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Toptal in the press

... allows corporations to quickly assemble teams that have the right skills for specific projects.

Despite accelerating demand for coders, Toptal prides itself on almost Ivy League-level vetting.

Our clients
Building a cross-platform app to be used worldwide
Building a cross-platform app to be used worldwide
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Creating an app for the game
Creating an app for the game
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Leading a digital transformation
Leading a digital transformation
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Testimonials

Tripcents wouldn't exist without Toptal. Toptal Projects enabled us to rapidly develop our foundation with a product manager, lead developer, and senior designer. In just over 60 days we went from concept to Alpha. The speed, knowledge, expertise, and flexibility is second to none. The Toptal team were as part of tripcents as any in-house team member of tripcents. They contributed and took ownership of the development just like everyone else. We will continue to use Toptal. As a start up, they are our secret weapon.

Brantley Pace, CEO & Co-Founder

Tripcents

In addition to sharp technical skills, Faruk had a great attitude and is a really exceptional communicator. He always let us know where he was with his work, thoroughly and reliably. That's not always the case, and it made working remotely considerably easier. He was an easy integration into the team.

Leif Abraham, Co-Founder

AND CO Ventures Inc

I am more than pleased with our experience with Toptal. The professional I got to work with was on the phone with me within a couple of hours. I knew after discussing my project with him that he was the candidate I wanted. I hired him immediately and he wasted no time in getting to my project, even going the extra mile by adding some great design elements that enhanced our overall look.

Paul Fenley, Director

K Dunn & Associates

The developers I was paired with were incredible -- smart, driven, and responsive. It used to be hard to find quality engineers and consultants. Now it isn't.

Ryan Rockefeller, CEO

Radeeus

Toptal understood our project needs immediately. We were matched with an exceptional freelancer from Argentina who, from Day 1, immersed himself in our industry, blended seamlessly with our team, understood our vision, and produced top-notch results. Toptal makes connecting with superior developers and programmers very easy.

Jason Kulik, Co-Founder

ProHatch

As a small company with limited resources we can't afford to make expensive mistakes. Toptal provided us with an experienced programmer who was able to hit the ground running and begin contributing immediately. It has been a great experience and one we'd repeat again in a heartbeat.

Stuart Pocknee , Principal

Site Specific Software Solutions

We used Toptal to hire a developer with extensive Amazon Web Services experience. We interviewed four candidates, one of which turned out to be a great fit for our requirements. The process was quick and effective.

Abner Guzmán Rivera, CTO and Chief Scientist

Photo Kharma

Sergio was an awesome developer to work with. Top notch, responsive, and got the work done efficiently.

Dennis Baldwin, Chief Technologist and Co-Founder

PriceBlink

Working with Marcin is a joy. He is competent, professional, flexible, and extremely quick to understand what is required and how to implement it.

André Fischer, CTO

POSTIFY

We needed a expert engineer who could start on our project immediately. Simanas exceeded our expectations with his work. Not having to interview and chase down an expert developer was an excellent time-saver and made everyone feel more comfortable with our choice to switch platforms to utilize a more robust language. Toptal made the process easy and convenient. Toptal is now the first place we look for expert-level help.

Derek Minor, Senior VP of Web Development

Networld Media Group

Toptal's developers and architects have been both very professional and easy to work with. The solution they produced was fairly priced and top quality, reducing our time to launch. Thanks again, Toptal.

Jeremy Wessels, CEO

Kognosi

We had a great experience with Toptal. They paired us with the perfect developer for our application and made the process very easy. It was also easy to extend beyond the initial time frame, and we were able to keep the same contractor throughout our project. We definitely recommend Toptal for finding high quality talent quickly and seamlessly.

Ryan Morrissey, CTO

Applied Business Technologies, LLC

I'm incredibly impressed with Toptal. Our developer communicates with me every day, and is a very powerful coder. He's a true professional and his work is just excellent. 5 stars for Toptal.

Pietro Casoar, CEO

Ronin Play Pty Ltd

Working with Toptal has been a great experience. Prior to using them, I had spent quite some time interviewing other freelancers and wasn't finding what I needed. After engaging with Toptal, they matched me up with the perfect developer in a matter of days. The developer I'm working with not only delivers quality code, but he also makes suggestions on things that I hadn't thought of. It's clear to me that Amaury knows what he is doing. Highly recommended!

George Cheng, CEO

Bulavard, Inc.

As a Toptal qualified front-end developer, I also run my own consulting practice. When clients come to me for help filling key roles on their team, Toptal is the only place I feel comfortable recommending. Toptal's entire candidate pool is the best of the best. Toptal is the best value for money I've found in nearly half a decade of professional online work.

Ethan Brooks, CTO

Langlotz Patent & Trademark Works, Inc.

In Higgle's early days, we needed the best-in-class developers, at affordable rates, in a timely fashion. Toptal delivered!

Lara Aldag, CEO

Higgle

Toptal makes finding a candidate extremely easy and gives you peace-of-mind that they have the skills to deliver. I would definitely recommend their services to anyone looking for highly-skilled developers.

Michael Gluckman, Data Manager

Mxit

Toptal’s ability to rapidly match our project with the best developers was just superb. The developers have become part of our team, and I’m amazed at the level of professional commitment each of them has demonstrated. For those looking to work remotely with the best engineers, look no further than Toptal.

Laurent Alis, Founder

Livepress

Toptal makes finding qualified engineers a breeze. We needed an experienced ASP.NET MVC architect to guide the development of our start-up app, and Toptal had three great candidates for us in less than a week. After making our selection, the engineer was online immediately and hit the ground running. It was so much faster and easier than having to discover and vet candidates ourselves.

Jeff Kelly, Co-Founder

Concerted Solutions

We needed some short-term work in Scala, and Toptal found us a great developer within 24 hours. This simply would not have been possible via any other platform.

Franco Arda, Co-Founder

WhatAdsWork.com

Hire Software Developers Seamlessly with Toptal

1

Talk to One of Our Industry Experts

A Toptal director of engineering will work you to understand your goals, technical needs, and team dynamics.
2

Work With Hand-Selected Talent

Within days, we'll introduce you to the right software developer for your project. Average time to match is under 24 hours.
3

The Right Fit, Guaranteed

Work with your new software developer for a trial period (pay only if satisfied), ensuring they're the right fit before starting the engagement.

Tap Into World-Class Talent

  • Trusted Experts Only

    Trusted Experts Only

    All of our talent are seasoned experts who ramp up quickly, readily contribute as core team members, and work with you to minimize onboarding time.

  • The Right Fit

    The Right Fit

    We have a knack for matching you with the right fit. Start working with your new hire on a no-risk trial period, paying only if satisfied.

  • Scale as Needed

    Scale as Needed

    Hire in under 2 weeks and scale your team up or down as needed, no strings attached.

  • Seamless Hiring

    Seamless Hiring

    We handle all aspects of billing, payments, and NDA’s. Let us take care of the overhead while you focus on building great products.

  • Flexible Engagements

    Flexible Engagements

    Choose the engagement type that suits your needs — hourly, part-time, or full-time — with the ability to change anytime.

  • Expert Talent Matching

    Expert Talent Matching

    Focus on your project and enjoy support from your dedicated account executive and expert talent matcher.

Featured Toptal Software Developers Publications

Amin Shah Gilani
EngineeringTechnology

A Software Defined Radio Tutorial: Images from the International Space Station and Listening to Hams with an RTL-SDR

by Amin Shah Gilani
Kyle Kotowick, Ph.D.
EngineeringProject Management

Innovation with Life-critical Systems

by Kyle Kotowick, Ph.D.
Andrei Smirnov
EngineeringTechnology

A Vital Guide to Qmake

by Andrei Smirnov
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