Fintech Solution Development for a London-based P2P Lending Company

Client background

RateSetter is a P2P lending platform operating in the UK and Australia. Since 2010 it has matched thousands of investors and borrowers and demonstrated excellent track record with over £1.5 bn in personal and business loans.

Business challenge

RateSetter required a strong team of engineers with substantial fintech expertise to modernize their current product and develop new functionality. Additionally, the client needed to migrate from the monolithic architecture to microservices as well as ensure the security of the platform and its compliance with fintech regulations.


N-iX engineering expertise and vast fintech experience have helped the client to attain their objectives faster and accelerate the digital transformation of the product. The gradual shift to the microservice architecture has ensured the highest scalability of the solution.

Value delivered by N-iX

  • Migration to the microservice architecture, contributing to the architecture design;
  • Development of a robust test framework;
  • Ensuring the security of the service while following all the necessary fintech regulations;
  • Modernizing the technological stack of the solution.

United Kingdom, London
Partnership period
May 2016 - present
Team size
Team location
Ukraine, Lviv
Expertise delivered
Cloud Solutions Business Intelligence SOA, Microservices, Identity and Access Management


Client’s goals

  • Increase engineering capacities to accelerate the development process;
  • Foster innovation by modernizing the technological stack of the service using latest coding practices;
  • Switch from the monolithic architecture to the service-oriented system which would allow to scale the product faster and introduce innovations more easily. In addition, such software design would help to accelerate ongoing development and facilitate product maintenance.
  • Build an efficient testing framework that would be used for faster software debugging and guarantee its flawless operation;
  • Ensure the security of the users’ personal information and the compliance of the product with fintech industry regulations and policies;

Experienced developers are naturally attracted to challenging projects and the possibility to work with latest technologies. That is why we managed to gather a strong team for RateSetter in a short time frame. The engineers have worked on a number of tasks of different complexity such as:

  • Incorporating innovative tech stack into the existing platform;
  • Rebuilding the architecture of the solution and changing it into the service-oriented system;
  • Developing a reliable and efficient test framework in a limited time frame;
  • Implementing a number of security features for user validation, email validation, protection of personal data etc.

The initial RateSetter team at N-iX comprised 16 IT specialists – 11 developers and 5 automation testers. After the successful completion of the first iterations, the client decided to extend the team to over 20 developers who work according to Scrum in 5 distributed teams. Our programmers cooperate tightly with on-site engineers and provide their professional insight about the product performance at all times. Since the beginning of the project, they’ve contributed to the implementation of the following functionality:

  • Rebuilding the monolithic architecture into the service-oriented system.

Currently, the team is working on replacing the monolithic back-end application with a microservices architecture. Such system has many benefits as it is more flexible and easier to update or modify. The separate parts of such architecture work as a unified application. In addition, if you need to eliminate a bottleneck with one process, you can easily update only that specific part without affecting other services.

  • Development of the testing framework.

The extended team has enabled our client to focus on a wider range of tasks, one of which was to rebuild the testing framework. Our team has put special effort into analysing the initial solution and identifying the areas for further improvement. The engineers have designed and developed a full-scale framework for all kinds of testing and covering diverse testing processes. What is more, the team managed to develop this complex but still mature product in a rather short time.

  • Introducing innovations and modernizing the tech stack.

RateSetter constantly improves their technological stack and modernizes the product in order to maintain the competitive edge. As a provider, we thus allocated the specialists in the latest efficient technologies to foster the adoption of innovations. Although working with new technologies is always challenging, the engineers have managed to integrate them with the application at the same time ensuring seamless functioning of the product.

  • Ensuring the security of the service

In over 10 years working with fintech companies, N-iX specialists have tackled a variety of security-related challenges. Yet the microservice architecture required a new approach to many security tasks.

  • Compliance with fintech industry regulations

RateSetter is fully regulated by the FCA and is regularly audited. The development team work in accordance with the prevailing regulation and auditor recommendations. For instance, the engineers follow all the auditors’ requirements and often rewrite some parts of the software to match new norms or get a new license. Thanks to the vast experience in fintech development, N-iX specialists are well aware of the specifics of the industry so they swiftly react to any changes in the regulatory policies.

  • Upcoming development of the Decision Engine

Although the developers have already resolved many challenges of this project, more interesting tasks still lie ahead. One of them is the development of the Decision Engine – a complicated solution that is going to help RateSetter establish whether a user is eligible for a loan. The finance development team has already started work on this solution so ultimately, it is is going to be integrated with the application.

Value Delivered by N-iX

Since the client needed engineering resources to scale their business, our task was to allocate a strong development team in Ukraine. Thanks to the extensive recruitment capacities and the positive employer image, N-iX managed to find the best engineers within a short time frame. This allowed the client to deliver a range of service improvements:

  • uptime and flexibility the company needed to meet the demands of their growing user base; faster implementation of technological tasks
  • great progress in replacing the monolithic architecture with a more adaptable microservice system
  • valuable insights into software architecture and solution performance
  • fintech industry experience, ensuring the highest security of the product and its compliance with industry regulations
  • faster adoption of innovations, introduction of latest coding practices and technologies


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