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we build Products that

solve Your biggest problems.

2+ million lines of code | Millions of users reached | Millions of dollars made
20+ industries  | 30+ winners | World class engineering

What we do

521 Tech Labs is an award winning App Development and Artificial Intelligence team based in Sydney, Australia. Trusted by Fortune500 companies and growing start ups. We help you innovate and connect with your users through technology.

Web & Mobile Apps

Deliver great product experiences into your customers' hands with Web & Mobile Apps that are built to scale from day one.

Technical Strategy

Empower your business with emerging technologies and best practices to improve your company's tech advantage.

artificial intelligence

Engineer extremely smart solutions using Machine Learning and improve your company's efficiency.

API & Platforms

Power your app with high performance API systems that use the best modern code patterns. Connect users to your platform.


Up skill with customised training programs for teams and individual developers to ship good code, fast and efficiently.

Meet the 521 Alumni

technology Driven by results

Innovate your company's technology by partnering with a dev team that's done it before. We've helped our clients launch digital products in over 20+ industries.

Supply chain / Blockchain

Raised $3.5 Million

Automotive / Marketplace / WebApp

95,000+ listings in 9 months

Fintech / Marketplace / WebApp

Generated $4M MMR

Tax / Automation / WebApp

Optimised App for $Bn clients

Logistics / Blockchain / WebApp

Handed over to The UN/WFP

Solar Energy / Marketplace

$1.3Bn in solar contracts

Education / WebApp / Platform

Raised $3M more

Healthcare / Marketplace / App

Connecting over 10,000+ users
Trusted by fast-growing start ups and organisations

Success Stories

Your success is our success! So we're proud to share with you these stories and media mentions recognising our clients in their industries.

Hire us

Lumachain lands $3.5 million for tech tackling modern slavery in food supply chains

SocietyOne's loan book boosted by broker channel

The UN's World Food Programme Harnesses Devery's Blockchain Technology to Track and Safely Deliver Food to Tunisian School Children

Transcendence stands out in the recent global blockchain technology summit

US giant Cox Automotive launches Autotrader in Australia

Passionate about digital products

We build our own products

Not just another development agency. We’re truly passionate about harnessing technology to solve problems and create digital experiences. So in our spare time you’ll see us building digital tools to make life better for developers. #madebydevsfordevs



VP & Co-Founder @ Maoneng & TSD Network

“FIVE 2 ONE and V built out our entire software architecture, from website, dApp to blockchain smart contracts. Not only did they do an excellent job at this - they always worked like they were part of us, and wanted to see this succeed as much as the TSD/Maoneng team themselves. They would go out of their way to explain and educate the management team about the technicalities and were always available to communicate with. To them - code quality and performance was of paramount importance - and thats how I work!”

Jamila Gordon

CEO @ Lumachain | ex-CIO Qantas

“521 was excellent in restructuring a vital part of our product. V and his team were always there and always gave excellent advice on what needs to be done - he really knows his stuff. They went above and beyond to deliver what we asked for. Always available to talk to get advice on software and technology”

Stephanie Khalil

Founder @ OnRoute App

"I worked with V and the team to build out OnRoute and had a great time working with them, it was a tough challenge but they did a great job. We ironed out the kinks in our delivery process and built out a quality product that people are using."

Jeremy Gupta

ex-CTO @ Autotrader & Carsguide

"Autotrader worked with FIVE 2 ONE to bring to life a part of the experience that we predict significant growth in. The challenge was complex from a technical point of view and also required close collaboration with both stakeholders and the internal team - something that didn't prove to be a problem. The results speak for themselves and we've seen significant uplift in the new experience which FIVE 2 ONE should be proud of, we're excited about continuing to partner with them as the experience evolves."

Bill Kalpouzanis

COO & Co-Founder @ Lodex Australia

"Lodex worked with FIVE 2 ONE to build out a component of our blockchain infrastructure. Their knowledge, professionalism, and speed to execute completely exceeded our expectations. V and the team were always in touch and went above and beyond to work with our CTO to make sure everyone was equally educated and empowered technically. We were nothing but impressed with their authenticity and quality of work. Accordingly, we highly recommend FIVE 2 ONE to any business requiring technology solutions and advice."

Simon farrell

CTO @ SocietyOne

"FIVE 2 ONE and V did an amazing job in building a key product for SocietyOne.  Vaibhav and his team were always engaging and they went above and beyond to bring a critical project to life.  I highly recommend his team to anyone needing to get a project/initiative off the ground fast and quick to market. The broker project has become a massive success generating nearly $4M a month only a few months after launch."

Frenn aben

CEO and Co-founder @ Kalinga Health

"We developed an intricate and versatile mobile app from scratch using technologies that make Kalinga one of the fastest in the market. The product was designed, developed and engineered in our Sydney office.
They were incredible to work with. They were in touch with me all the time, talking to the devs directly was the best experience, and any change I wanted was addressed immediately. Well done to the team for building a great product that is incredibly complex."

Theo Denovan

Partner @ PwC, Enterprise Digital

"We engaged with Vaibhav and his team to build an app we released globally. He was very resourceful in executing the project to its completion. We would use FIVE 2 ONE again to assist us with future projects"

Andrew Rasheed


"We integrated FIVE 2 ONE into our team to work with us for one of our ongoing international projects. It was a great experience and Vaibhav and his team are second to none."

Patrick Purcell

Head of Technology @ Gecko Governance

"We reached out and worked with V as our Technical Advisor assisting with decisions on core architecture for our platform along with blockchain decisions to ensure efficiency in the what we were building. He's a pleasure to work with and is always available to communicate and would highly recommend working with him and/or his team to build incredible products."

Tom waterhouse

Director @ Tom Waterhouse

"V was a great add to the team. He helped spear head the transition of a massive framework to host our large customer base. He holds a strong technical ground. He was always positive, entrepreneurial and we've kept in touch ever since. I'd definitely recommend working with V"

The 521 Advantage

1. Vast Experience

Our team has delivered global projects for over 40+ companies in over 20+ industries.

2. Profitable Code

Our code helps our clients generate $millions every month. We're all about impact.

3. Industry Experts

We've trained and developed 1000s of Engineers for multi nationals to veteran developers.

4. Trusted

We're trusted by companies big and small with scaling their business with technology.

5. Product Focused

We're truly passionate about products, and have even built our own start up called Laddr.

Have a project for us?

“Hi, I’m Vaibhav (or just 'V').
Are you looking for an experienced development team?
Look no further.
Contact us today for your free consultation worth $900!

Vaibhav Namburi

Director @ Five2One Tech Labs

“Hi, I’m Vaibhav (or just 'V').
Are you looking for an experienced development team?
Look no further.
Contact us today for your free consultation worth $900!”

Vaibhav Namburi - Director @ Five2One

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In the ❤️ of Sydney, L16 - 175 Pitt St