Case studies
Real-world results from our clients
Case Study #1
Core Banking and Payment Processing for
Moniepoint
Industry: Fintech
Engagement: Team Augmentation
Duration: 2022–2025
Moniepoint is a leading financial services provider in Africa, managing a core banking and payments ecosystem that supports over 10 million accounts and processes more than 26 million daily payments.
The Challenge
Moniepoint needed to scale its infrastructure to keep pace with growing demand. Their systems required architectural upgrades, solutions for efficient integration with legacy and external platforms, and enhanced capabilities for reconciliation and settlement.
The Solution
Under a Team Augmentation model, Rational Data’s senior software engineers were embedded directly into Moniepoint’s development teams to:
- [1]Enable compatibility between legacy and modern banking systems
- [2]Improve microservices communication for real-time and asynchronous operations
- [3]Enhance performance and reliability for processing massive transaction volumes
Tech Stack
Java / Spring Boot, Angular, React, MySQL, ClickHouse, Google Cloud Platform (GCP), Datadog
The Outcome
- [1]New outgoing payment features integrated successfully
- [2]Scalable architecture supporting high-volume transactions
- [3]Crash-resistant reconciliation system
- [4]Continuous compliance with Nigeria’s regulatory framework
“Moniepoint gained valuable technical expertise through the senior software engineers that Rational Data provided from Greece. The professionalism and adaptability of their entire team made the partnership highly productive from start to finish.”
Case Study #2
Mobile Payments for
pawaPay
Industry: Mobile Payments
Engagement: Team Augmentation
Duration: 2020–2023
pawaPay offers a mobile payments API for businesses to send and receive money across 19 African countries via telco integrations.
The Challenge
pawaPay needed a scalable backend and reliable integration framework to manage distributed transactions securely and consistently across multiple telecom infrastructures.
The Solution
Under a Team Augmentation model, Rational Data provided a principal engineer to:
- [1]Build an abstraction layer for streamlined telco integrations
- [2]Ensure atomicity in distributed transactions to maintain consistency
- [3]Integrate HashiCorp Vault to manage credentials and secrets securely
- [4]Strengthen microservices orchestration and error handling
Tech Stack
Java / Spring Boot, ActiveMQ, Kafka, PostgreSQL, Kubernetes, Grafana, Argo CD, AWS
The Outcome
- [1]Faster, easier integration with new telco providers
- [2]Reliable and consistent transaction processing
- [3]Strengthened platform security and operational resilience
Case Study #3
Private Banking for
Unleashed Capital
Industry: Private Banking / WealthTech
Engagement: Team Augmentation
Duration: 2022
Unleashed Capital is a Berlin-based neo-bank enabling customers to invest across financial instruments such as stocks, ETFs, and bonds through a secure digital platform.
The Challenge
The startup needed to securely connect to financial institutions, track orders, and build a highly accurate ledger to support trading, auditing, and portfolio management.
The Solution
Under a Team Augmentation model, Rational Data assigned a backend engineer to:
- [1]Implement secure SWIFT messaging using FIX protocol
- [2]Build a custom Order Management System (OMS) for trading activity
- [3]Develop a precision ledger to support accurate snapshots and replication
- [4]Create APIs and WebSocket channels for portfolio tracking and real-time updates
Tech Stack
TypeScript / NestJS, PostgreSQL, RabbitMQ, Kafka, REST API, WebSocket, FIX Protocol, GraphQL, Grafana, Prometheus
The Outcome
- [1]Secure transactions across financial instruments via SWIFT
- [2]Fully functional custom OMS
- [3]Accurate, auditable ledger system for transaction tracking
Case Study #4
Internal Monitoring Tools for
Salesforce
Industry: CRM / Enterprise Software
Engagement: Team Augmentation
Duration: 2020–2022
Salesforce is the global leader in CRM solutions. The Observability Cloud platform helps enterprise teams monitor performance across complex cloud environments.
The Challenge
Salesforce needed experienced frontend developers to design internal observability tools, integrate monitoring dashboards, and streamline DevOps pipelines.
The Solution
Under a Team Augmentation model, Rational Data embedded senior frontend developers into Salesforce’s internal observability team to:
- [1]Build performant, user-friendly dashboards using React and TypeScript
- [2]Integrate open-source monitoring tools into internal systems
- [3]Streamline DevOps and deployment workflows
- [4]Improve the usability and visual clarity of observability metrics
Tech Stack
React, TypeScript, Java
The Outcome
- [1]Enhanced observability across enterprise environments
- [2]Faster internal tool development and deployment
- [3]Improved experience for engineering teams working with performance data
Case Study #5
Location Data Enrichment for
HERE Technologies
Industry: Location Intelligence / Mapping
Engagement: Project Outsourcing
Duration: 2020–Ongoing
HERE Technologies provides detailed geolocation and mapping services across industries. They needed better POI data quality for their Greek market.
The Challenge
HERE required accurate, up-to-date location data, especially in the hospitality sector, through a scalable solution that could streamline data collection and validation.
The Solution
Under a Project Outsourcing model, Rational Data:
- [1]Developed custom data collection tools to support field operations
- [2]Automated ingestion and enrichment workflows for geospatial data
- [3]Validated POI accuracy through structured QA steps
- [4]Delivered location data updates
The Outcome
- [1]High-accuracy POI data for key Greek sectors
- [2]Accelerated updates to HERE’s Maps platform
- [3]Consistent and scalable data processing across research teams
“Rational Data delivered on time, were quick to answer our questions, and kept us in the loop with regular progress updates … their straightforward, no-nonsense approach made working with them easy and efficient.”
Case Study #6
Automated Testing for
Uni Systems (for EU institutions: ECHA & EMA)
Industry: Public Sector / QA & Compliance
Engagement: Team Augmentation
Duration: 2021–Ongoing
Uni Systems delivers IT services to the official institutions of the European Union. Rational Data supports manual and automated QA testing for EU projects, including platforms that handle
pharmaceutical approvals and chemical regulation.
The Challenge
Mission-critical software used by ECHA and EMA required continuous testing coverage to meet regulatory standards and ensure reliability across evolving features.
The Solution
Under a Team Augmentation model, Rational Data’s QA engineers joined Uni System's development teams for EU projects to:
- [1]Automate UI testing using Selenium and Cypress
- [2]Create BDD test cases with business analysts using Cucumber
- [3]Validate APIs and edge cases through Postman and exploratory testing
- [4]Manage CI/CD pipelines via Azure DevOps and Jenkins
Tech Stack
Java, Selenium, Cucumber, Cypress, TypeScript, Postman, Azure DevOps, Jenkins
The Outcome
- [1]Reliable software releases across multiple EU institutions
- [2]Full test coverage aligned with regulatory requirements
- [3]Faster feedback cycles and reduced manual QA overhead
“We’ve been working with Rational Data’s senior test automation engineers for over 4 years now, and it’s been a very positive experience! Their deep expertise in quality assurance and agile processes has helped us keep the quality high on our software projects.”