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Massively Multiuser Application Development Services

Massively Multiuser Application Development Services

We build and deliver complex, scalable and change-tolerant data-centric solutions able to handle multimillion user audiences and process dozens of petabytes of data at a lightning speed and at a reasonable cost.

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Our massively multiuser software solutions include but aren’t limited to

Highly scalable architecture design and optimization

At Xenoss, our custom multiuser software development services start with creating a scalable and optimized data-intensive architecture design. It is built considering the limitations and bottlenecks of your existing legacy solution, current / future market and user behavior trends, painstaking research, and your business specific requirements.

Microservices Application Development

Based on Xenoss extensive experience creating highload microservices-based applications, we can provide you with well-polished and proven multiuser product development services and deliver software that is easy to upgrade and maintain, with zero downtime.

Multitenant Application Development

At Xenoss, we implement custom B2B-B2C multi-tenant architecture for you and your clients to benefit from the centralized orchestration without any security vulnerabilities. Optimize performance across your entire system, cut down your software development investment and maintenance costs, automate and simplify onboarding of new tenants, and improve scalability and accessibility of your SaaS application with our refined massively multiuser software development services.

SaaS multiuser application development and support

As the volume of data in your database increases, you’ll be required to increase the overall bandwidth of your SaaS application and change it so that it becomes more load-tolerant, can deal with large data volumes and a large number of concurrent users. We’ll support you throughout your multiuser product development journey, from ideation and proof of concept all the way through to alpha and beta release, to scale-up and evolution.

Third-party API integrations

We enable seamless integration of your SaaS product with any third-party services such as CRM, payment getaways, CPaaS, marketing and conversational AI platforms, live chats, etc., though custom-made or existing APIs.

QA and testing of massively multiuser software products

At Xenoss, we offer a wide range of software QA and testing services that meet the highest industry standards, including security. Reduce time-to-market, management risks, and operating costs through our meticulous testing solutions. We provide full test coverage for your massively multiuser software including manual and automated UI testing, API testing, performance testing and security (penetration) testing.

Types of massively multiuser software we build and deliver

Our massively multiuser product development services have helped numerous clients solve scalability issues, improve critical business indicators, reduce operational costs, and improve top-line growth.

These are just some types of massively multiuser products we are experienced with:

Social networks

Content delivery networks

Live streaming platforms

Conferencing software

Voice chat platforms

Mass multiplayer game servers

Data Management Platforms

Customer Data Platforms

Video-on-demand platforms

Why build your massively multiuser solution with Xenoss?


Built to scale

In taking your project from the ground up, we consider your solution’s architecture as a top priority. We design flexible architectures and optimize your infrastructure to make sure your product scales properly as your solution becomes more mature and its user base grows exponentially.


Average solution uptime of 99.4%

You get a high-performance and load-tolerant software solution, which allows you to avoid overheads and other painful business consequences of system downtime and instability. Use our solid knowledge for maximizing your multiuser solution’s uptime and attracting new audiences.


MVP the right way

The first commercial version of your product will be built and shipped for minimum time and money to enable you to start selling and validating hypothesis ASAP. On average, it takes us 4-6 weeks to deliver an MVP, even for solutions of high complexity.


Immediate start

We start the project right after you give us the green light. You’ll get an easily manageable plug-and-play development team that will be smoothly integrated with your in-house environment and act as an organic extension of your internal IT organization.

Are you looking to build a massively multiuser system from scratch or revamp and evolve your existing solution?

At Xenoss, we’re here to ensure smooth and economical evolutionary product development rather than expensive and stressful revolutionary alteration.

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What our clients say

Picture of Edward Lyon, HEAD OF PRODUCT, AD-LIB

Edward Lyon


Our business has grown since we started working with Xenoss by an enormous amount and much of that has to do with the software that they’re developing. The most impressive aspect of our collaboration is that the Xenoss team keeps on solving challenges we put in front of them and these are challenges that anecdotally, other businesses have tried solving but are not successful.

Edward Lyon


Photo of David Philippson on conference

David Philippson


We were looking for an experienced vendor to develop a performance-based media buying solution from scratch. One of the main reasons why we chose Xenoss was their extensive domain knowledge. It allowed us to save time and effort at the initial stages and dive right in product development. The team’s been very professional and responsive to our needs and was able to deliver the MVP under just several months. Later on, they’ve transformed it into a fully featured platform for in-game advertising, which already proved highly scalable and able to manage high load. I’ve been truly happy with their work, high quality standards, and communication.

David Philippson


Mat Cannon


We’ve been a client of Xenoss for a year now and find them an excellent technology partner. Highly skilled and knowledgeable with the ability to rapidly adapt to our needs. We intend to double the size of our current team with them in 2021.

Mat Cannon


Picture of Oli Marlow Thomas, CEO & FOUNDER, AD-LIB

Oli Marlow Thomas


At some point of our business journey, we had a frustrating experience with our product, from barely managing its instability to fixing errors on the fly. Xenoss team helped us build a well-balanced tech organization and deliver the MVP within a very short timeline. It let us timely onboard huge clients such as Adidas, Tesco, Uber and keep up our growing pace. I’m glad we’ve been working with such highly-productive team. I particularly appreciate their ability to hire extremely fast and to generate great product ideas and improvements.

Oli Marlow Thomas



Ben Dzamba


Before turning to Xenoss, we had a demand-side platform that was costly and not scalable. Having access to a wealth of experience on the Xenoss team related to our domain of real-time bidding, we’ve cut costs and now have a much more efficient, reliable DSP for our customers. I’d gladly recommend Xenoss as a technology partner. I’ve found the team to be very professional and diligent, ensuring that our needs and expectations are met through every step of the development process.

Ben Dzamba


Do you need help choosing the right architecture for your massively multiuser product development?

At Xenoss, software architecture is always top of mind and never an afterthought! We’re well aware of the high price businesses pay due to the wrong choice of architecture for their solution development.

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How it works

Our services and solutions are aligned closely with your current or future technology needs. Our consultants accompany you through all phases of your software development journey and help implement your solution fast and efficiently to make sure you reach your most aggressive business goals.

  1. 1


    We’ll look carefully into your current software architecture, IT infrastructure, tech and product roadmap and will help identify potential bottlenecks preventing you from future scaling.

  2. 2

    Project proposal

    We provide a detailed project proposal covering product scope, high-level architecture, tech stack, team structure, release schedule, development processes, methodologies, etc. At this stage, we recommend how to build your multiuser app, with flexible data architectures and future scaling needs in mind.

  3. 3

    Visual prototyping

    You get a completely operable proof-of-concept solution that can be used to get user feedback, attract external funding, onboard the first paying customers, etc.

  4. 4


    You get a completely operable proof-of-concept solution that can be used to get user feedback, attract external funding, onboard the first paying customers, etc.

  5. 5

    QA and testing

    Our meticulous QA process ensures stable performance and the highest possible level of security for your multiuser software solution.

  6. 6

    Project launch

    We build up your solution development team and inject it smoothly into your in-house corporate environment (if needed), and execute the project as per your specification and roadmap.

Let’s discuss your challenge