Legacy Architecture Revamp for Software Development Company
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API Development Mobile App Development Web Development
- $200,000 to $999,999
- July 2025
- Quality
- 5.0
- Schedule
- 5.0
- Cost
- 5.0
- Willing to Refer
- 5.0
"What set Euristiq apart was their ability to blend technical excellence with domain empathy."
- Other industries
- Helsinki, Finland
- 11-50 Employees
- Online Review
Euristiq modernized the legacy architecture of a software development company. The team migrated key functionalities to a cloud-native environment, integrated a CI/CD pipeline, and built an API gateway.
Euristiq's work reduced system latency, resulting in faster response times and a smoother experience for end clients. The team had a well-structured project management style and was highly responsive. Their technical excellence and thorough documentation were hallmarks of their work.
The client submitted this review online.
BACKGROUND
Please describe your company and position.
I am the SOLUTION ARCHITECT, CTO of Creative Software Innovations
Describe what your company does in a single sentence.
We are CSI, Creative Software Innovations, specialized in developing legal case management systems. We are devoted to minimizing law firms' daily routines to allow them focus on more productive tasks generating invoicing and profit. CSI Lawyer® helps large and medium-sized law firms to professionally manage the whole lifecycle of their legal cases - from the AML and conflict check stage until invoicing and payment management. Besides offering advanced functionality based on best practices, CSI Lawyer can be flexibly customized to support a law firm's unique needs. CSI Lawyer brings operational and financial transparency to business. It offers 360-degree views of customers and legal cases, covering also the accounts receivable within the same system. Its flexible reporting tools provide information required for daily business management as well as for development. CSI Lawyer is already used by 300 customers in seven countries around the Baltic Sea, representing different sizes and company cultures. The stable and reliable Windows-based system is available both in the cloud and on-premise, and our experienced team ensures fast, cost-effective and correct implementation. And when facing software-related issues, our support team is available in English, Swedish and Finnish.
CSI Helsinki on asianajotoimialan ja asiantuntijaorganisaatioiden haasteisiin erikoistunut ohjelmistotalo, joka kehittää toimeksiantojen hoitamista ja laskuttamista tukevia työkaluja.
OPPORTUNITY / CHALLENGE
What specific goals or objectives did you hire Euristiq to accomplish?
- The primary goal was to modernize our legacy architecture into a more modular, scalable, and cloud-friendly system without disrupting existing users, compromising data integrity, or losing domain-specific customizations that law firms had come to rely on.
- We also sought to eliminate the performance bottlenecks that were emerging across both our on-premise and cloud deployments, accelerate feature release cycles through a more agile backend, and ensure compatibility with modern third-party systems such as CRMs and accounting software
- . The project had to be done with a high degree of sensitivity, given the nature of legal data, and demanded full compliance with privacy regulations and auditability standards.
SOLUTION
How did you find Euristiq?
Clutch Site
Why did you select Euristiq over others?
- High ratings
- Pricing fit our budget
- Great culture fit
- Good value for cost
How many teammates from Euristiq were assigned to this project?
2-5 Employees
Describe the scope of work in detail. Please include a summary of key deliverables.
Euristiq approached the engagement with a thorough discovery phase, which we deeply appreciated. Before a single line of code was rewritten, they invested significant effort in understanding the architectural foundation of our legacy CSI Lawyer system. We jointly identified critical modules that required reengineering and defined modernization strategies for backend services, UI layers, and data pipelines. The scope included refactoring our core business logic into modular microservices, migrating key functionalities to a cloud-native environment (while still supporting on-premise use cases), and integrating a modern CI/CD pipeline to streamline deployments.
A particularly challenging area was the modernization of our case lifecycle engine, which is complex due to its configurability. Euristiq didn’t propose a rip-and-replace approach. Instead, they rebuilt each component incrementally, testing against existing data models and usage patterns. They also redesigned the reporting engine to support more dynamic visualizations and built an API gateway to facilitate secure third-party integrations. We received detailed deliverables across all workstreams: updated service documentation, deployment playbooks, modular source code repositories, QA automation scripts, and change management guidelines tailored to both our internal dev teams and customer-facing support teams. Throughout the engagement, they were highly transparent and collaborative, offering technical walkthroughs, sprint demos, and architectural decisions with clearly documented justifications. It was evident that Euristiq was not just checking boxes, they were deeply invested in aligning their solution with our long-term business vision.
RESULTS & FEEDBACK
What were the measurable outcomes from the project that demonstrate progress or success?
The success of this collaboration wasn’t just in the technical migration, but in how seamlessly it was executed without interrupting our existing client base. One of the first noticeable outcomes was the reduction in system latency during high-volume operations particularly during month-end invoicing activities. Our clients reported faster response times and a smoother experience overall. Internally, our development team is now able to roll out new features with significantly less friction, thanks to the modular codebase and the new CI/CD infrastructure. Prior to this, updates involved lengthy regression testing due to the tightly coupled nature of the legacy architecture. Post-modernization, our QA cycles are more focused and predictable, and hotfixes are deployable with near-zero impact on production environments.
Additionally, we saw increased satisfaction from our enterprise clients, particularly those who had long requested integrations with external accounting and CRM systems. Euristiq’s implementation of the API gateway made those integrations much more straightforward. The reporting engine overhaul also gave our clients more control over visualizing their case metrics, billing histories, and account receivables. Our support tickets related to performance have significantly declined. From a business standpoint, this project allowed us to retain long-term customers who were previously considering alternatives due to limitations of our old platform. It also opened the door to serve larger firms that demand cloud-first legal tech solutions.
Describe their project management. Did they deliver items on time? How did they respond to your needs?
Euristiq’s project management style was one of the most refreshing aspects of the engagement. We worked with a dedicated delivery manager who served as a bridge between their engineering team and our stakeholders. Every sprint cycle was well-structured, with priorities discussed during weekly check-ins. They also used a shared dashboard to communicate progress transparently, complete with risk assessments and status updates on each deliverable. Their responsiveness was particularly notable we never had to chase them for clarification or follow-ups. Even when faced with architectural roadblocks or last-minute change requests, the team maintained a solution-oriented mindset. It never felt like we were working with an external vendor; the engagement was more akin to an extension of our internal team.
What was your primary form of communication with Euristiq?
Email or Messaging App
What did you find most impressive or unique about this company?
What set Euristiq apart was their ability to blend technical excellence with domain empathy. They took the time to understand how law firms use our product, what their pain points were, and how legal workflows differ from other industries. That domain understanding shaped their approach at every level be it UX decisions, audit trail compliance, or data migration integrity. Also, their documentation was among the most thorough we’ve encountered, which made internal knowledge transfer incredibly easy. Beyond technical know-how, their team had a calm, grounded energy throughout even when under pressure. That level of consistency and professionalism made the entire modernization journey feel less daunting than it actually was.
Are there any areas for improvement or something Euristiq could have done differently?
If we had to identify one area of improvement, it would be around localization support during the testing phase. While Euristiq’s engineers were fully proficient in English, some nuances in our Finnish- and Swedish-language modules took longer to iron out, partly due to our own limited availability of native testers. In future collaborations, we would consider adding a multilingual QA support phase earlier in the cycle. That said, once these localization gaps were identified, the Euristiq team responded swiftly, adapting their process to include more granular language checks. It’s a minor point in the context of a highly successful engagement, and one that we believe can be easily fine tuned in future iterations.
RATINGS
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Quality
5.0Service & Deliverables
-
Schedule
5.0On time / deadlines
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Cost
5.0Value / within estimates
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Willing to Refer
5.0NPS