Digital Software Engineering
Scaling Coconut / GoSimpleTax with modern cloud infrastructure to accelerate sustainable business growth
Share this case study on
The Success Story
Coconut/GoSimpleTax is a leading UK digital tax platform supporting sole traders and small businesses with HM Revenue & Customs (HMRC) filing, expense tracking, and Making Tax Digital (MTD) compliance. With rapid user growth, the goal was to modernize infrastructure, strengthen security, improve scalability, and deliver a seamless, always-available experience during peak tax seasons.
Aspire Systems partnered with Coconut/GoSimpleTax to modernize the technology foundation and enable sustainable growth. The engagement focused on migrating the platform to a secure, scalable VPC-based cloud architecture with load balancing, while strengthening data protection through GDPR-grade encryption frameworks. We unified the web, iOS, and Android experiences, introduced scalable subscription and payment systems, and automated key administrative workflows to reduce manual effort. As a result, the platform achieved consistent peak-season performance, significantly improved uptime, and delivered a smoother end-user experience supporting over 10,000 monthly tax submissions, driving a 144% increase in HMRC self-assessment filings, reducing support tickets, and achieving full Making Tax Digital compliance.
The Challenges
- Outdated Python/Django stack with limited scalability.
- Peak-season traffic caused performance bottlenecks.
- Growing GDPR and compliance requirements.
- Manual integrations create inconsistent user journeys.
- High support volume due to lack of self-service tools.
Aspire Systems’ Solution
- Migrated to VPC cloud with load balancing.
- Implemented GDPR-grade encryption frameworks.
- Unified web, iOS, and Android experiences.
- Built scalable subscriptions and payment systems.
- Automated admin tools and launched MTD capabilities.
Business Benefits
- 10,000+ monthly self-assessment tax return submissions with a 99% increase in uptime.
- 144% increase in HMRC self-assessment filings.
- Reduced support tickets through workflow improvements.
- Achieved Making Tax Digital (MTD) compliance.
- Enhanced security and sustained peak-season performance.
Testimonials
In our industry the more efficiently we do business today, the bigger our competitive edge. Aspire Systems helps achieve this by driving towards ambitious shared targets such as modernizing the cloud infrastructure to unlock agility, building scalable architecture to handle volume, security enhancements for seamless operations, and rendering delightful customer experiences.
A detailed look at how we solved a real business challenge
Why Choose Our Software & Tech Services?
250+
Cloud applications developed
2.5M
Tickets / incidents handled per year
80+
Products built on microservices architecture
120+
Mobile app platforms developed
