Hire the Top 3% of Freelance Radius Developers

Toptal is a marketplace for dedicated Radius developers, engineers, programmers, coders, architects, and consultants. Top companies and startups choose Toptal Radius freelancers for their mission-critical Radius development projects.

No-Risk Trial, Pay Only If Satisfied.

Hire Freelance Radius Developers and Engineers

Aliaksei Sheshka

Freelance Radius Developer
CanadaToptal Member Since April 1, 2022

Aliaksei is a network and system automation developer with many years of experience in SRE and network automation, cloud, and on-premise deployments. He has a proven track record in designing and managing complex high availability setups and IP networking using Linux, Kubernetes, SQL, and Go. Aliaksei has been running containerized workloads since 2002.

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Kal Biswas

Freelance Radius Developer
United KingdomToptal Member Since October 12, 2022

Kal is an architect with 28+ years of experience in a broad spectrum of technologies, including information security and identity and access governance and management domains. He has profound skills in identity as a service (IDaaS), protocols for federated identity such as OIDC and SAML, and biometric multi-factor authentication. Kal also specializes in next-gen technologies, verifiable credentials, self-sovereign identity, DevOps, IaC, and CI/CD patterns.

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James Nurmi

Freelance Radius Developer
PortugalToptal Member Since July 22, 2021

With two decades of experience, James brings a deep understanding of matching business requirements with practical solutions. From small shops just starting to get traffic to large shops looking to increase reliability, availability, and control costs, he brings expertise and creativity to help your business grow and thrive in the cloud. With diverse skills and a tenacity for problem-solving, James helps bridge the gap between what a business needs and how it can get there.

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Wichert Akkerman

Freelance Radius Developer
NetherlandsToptal Member Since May 11, 2020

A former CTO at multiple startups, Wichert has the experience needed to get your product or service off the ground. Working either solo or with a team, he enjoys building solid products that people enjoy using. Wichert would describe himself in five terms as pragmatic, experienced, open-source, full-stack, and social.

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Nicolae-Andrei Minescu

Freelance Radius Developer
RomaniaToptal Member Since October 27, 2022

Andrei is a software engineer with solid experience in Python, creating APIs and building apps in the Linux user space. He designed and implemented new features, which helped the company cut million-dollar deals. He enjoys new challenges related to programming, from embedded to web development, and is passionate about the Linux world.

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Henrique Diniz Silva

Freelance Radius Developer
BrazilToptal Member Since April 6, 2020

Henrique is a natural problem solver, so he’s continuously learning and contributing in a significant way. He’s worked on Java apps for SIM cards and credit cards, kernel drivers along with OS development for LG’s Android phones, C/C++ apps using SoC modems for 3G/4G networks. Henrique has also worked on networking at the kernel using the Android network stack (TCP/IP, HTTP, and other protocols), web apps using React, Vue.js, and Backbone.js, and built back-end apps with Java, Kotlin, and Go.

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Roberto José Roque Paz

Freelance Radius Developer
ArgentinaToptal Member Since June 13, 2022

Roberto is a DevOps engineer and architect who started his professional career as a freelance developer and Unix systems administrator. Most of his projects were oriented to embedded systems and domotics based on ANSI, C, Python, and Linux. Lately, Roberto has focused on DevOps with a preference for open source code and tools.

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Jan Mikeš

Freelance Radius Developer
Czech RepublicToptal Member Since January 8, 2019

Because Jan understands how important is delivering business values, he focuses on effective code delivery process. His own startup taught him, how to validate an idea, prototype and build MVP in a short period of time, as well as scale the product up. He also helps companies move to a cloud, building an infrastructure, automatizing and optimizing development processes, and passing this know-how to others. He loves to speak about CI/CD publicly.

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Pierre Franklin Dagba

Freelance Radius Developer
CanadaToptal Member Since January 16, 2023

Pierre is a senior integration engineer who focuses on system integration and validation. His expertise ranges from building private clouds and integrating on-premise systems with a public cloud to building and integrating end-to-end IPTV and value-added service telecommunications systems. Pierre has extensive troubleshooting, leadership, and analytical skills and has worked as a consultant across the Americas, Europe, and Asia.

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Abubakar Siddique

Freelance Radius Developer
Saudi ArabiaToptal Member Since October 31, 2022

Abubakar is an information systems security professional with highly developed and result-driven skills and over 10+ years of experience designing, deploying, securing, operating, and troubleshooting medium and large enterprise networks. His strengths include working with multiple security solutions through industry-leading vendors to serve other clients worldwide.

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Renato Araujo

Freelance Radius Developer
BrazilToptal Member Since November 7, 2018

Renato is a Linux and network system administrator with 20+ years of experience designing, deploying, and automating systems. He is comfortable working with organizations of all sizes—from small organizations to large enterprises.

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Discover More Radius Developers in the Toptal Network

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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
Creating an app for the game
Conor Kenney
Creating an app for the game
Leading a digital transformation
Elmar Platzer
Leading a digital transformation
Building a cross-platform app to be used worldwide
Building a cross-platform app to be used worldwide
Drilling into real-time data creates an industry game changer
Drilling into real-time data creates an industry game changer
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 startup, they are our secret weapon.

Brantley Pace

CEO & Co-Founder

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


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


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


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


How to Hire Radius Developers Through Toptal


Talk to One of Our Industry Experts

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

Work With Hand-Selected Talent

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

The Right Fit, Guaranteed

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


  • How are Toptal Radius developers different?

    At Toptal, we thoroughly screen our Radius developers to ensure we only match you with talent of the highest caliber. Of the more than 200,000 people who apply to join the Toptal network each year, fewer than 3% make the cut. You’ll work with engineering experts (never generalized recruiters or HR reps) to understand your goals, technical needs, and team dynamics. The end result: expert vetted talent from our network, custom matched to fit your business needs.

  • Can I hire Radius developers in less than 48 hours through Toptal?

    Depending on availability and how fast you can progress, you could start working with a Radius developer within 48 hours of signing up.

  • What is the no-risk trial period for Toptal Radius developers?

    We make sure that each engagement between you and your Radius developer begins with a trial period of up to two weeks. This means that you have time to confirm the engagement will be successful. If you’re completely satisfied with the results, we’ll bill you for the time and continue the engagement for as long as you’d like. If you’re not completely satisfied, you won’t be billed. From there, we can either part ways, or we can provide you with another expert who may be a better fit and with whom we will begin a second, no-risk trial.

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 talent within 48 hours 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.

Top Radius Developers Are in High Demand.

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