Industry-Specific Services
FINTECH
With our software solutions, your projects are in safe hands
Your Digital Payment Infrastructure
We develop secure FinTech software for processing sensitive data—from billing systems to integrations with leading payment providers—customized to meet your specific needs and regulatory requirements.
Topics & Solutions
Our Client List in the Fintech Sector
.Learn more about our fintech services.
Software Development and UXD for Credit Card and Banking Platforms
Highly innovative and user-friendly solutions for credit cards and banking …
Billing Engine: Digital Billing System
Our billing engine for SENEC: a custom-built billing system for complex energy contracts. …
Our Features for Your Payment Infrastructure
Our fintech solutions offer companies the ability to implement features tailored precisely to their specific needs. Instead of adapting processes to an existing system, the software is tailored to the actual workflow.
Among other things, this makes it possible to:








Current Topics
Success Story
Billing Engine for Complex Energy Contracts
A custom billing engine that fully automates invoicing for highly specialized energy contracts, from the middleware through Powercloud to the final PDF invoice, in production since 2020.
Blog Post
ZAP – The Security Tool Put to the Test by Experts
Success Story
XPAY: The platform for prepaid credit card programs
For Finatix GmbH, we handled the project management, development, and UX design of the XPAY system platform—modernized, cloud-based, and customizable.
Success Story
AI-Based Maintenance System for Energy Storage Systems
A neural network, trained on real-world data from more than 75,000 energy storage systems, identifies devices in the field that require maintenance before they fail. The project also included the handover of infrastructure to SENEC.
White Paper
Digital Readiness Check for Fleet Operators: “How Data- and AI-Ready Is Your Fleet?”
We classify digital maturity along three dimensions – system compatibility, cost efficiency, and the proportion of standard and custom solutions….
Innovative Real-Time Software Platform (IoT) for the Energy Storage Systems of Tomorrow
Real-time software platforms for the energy storage systems of tomorrow: Over the years, SENEC has developed five core areas – ranging from the storage platform to billing and the partner portal.
01
Experiences
For several years now, we have been developing cutting-edge and secure FinTech applications for processing sensitive data for well-known companies. We have experience in developing billing systems and platforms, as well as integrating with major payment and billing service providers (Adyen, BillingPlatform, billwerk, Braintree (PayPal), Payone, and Zuora). In addition, we ensure compliance with regulatory requirements and offer you comprehensive front-end and back-end solutions—user-centric and intuitive. We migrate your projects to the cloud and also handle project management—working according to effective strategies such as DevOps. In addition, we support you in product management, marketing, sales, and support.
A Look at Our Projects
Market-leading applications—across all industries. Whether it’s carsharing, industrial software, billing, or e-charging, we offer customized software solutions for all customer needs—forward-thinking and sustainable.
You are currently viewing placeholder content from YouTube. To access the actual content, click the button below. Please note that this will result in data being shared with third parties.
More Information
02
Technologies
When implementing your projects, we make sure to use state-of-the-art software technologies. Our industry-specific expertise and experience in the FinTech sector guarantee you the best possible solutions, tailored to your individual needs. We work with Microsoft Azure, specifically Azure Functions (serverless computing), Azure Event Hub (message broker), and Azure Resource Manager (infrastructure as code), and rely on databases such as PostgreSQL and search engines such as Elasticsearch. To ensure optimal implementation, we use Docker for the local test setup.
03
Integrated Billing Systems
Fully integrated billing systems—simple and easy to use. With our applications, you can easily combine different cost categories and services into a single invoice.
Frequently Asked Questions
What is custom FinTech software?
FinTech software is a custom-developed solution for financial processes such as accounting systems, payment processing, or the handling of sensitive financial data—tailored to the specific needs of each company.
How much does it cost to develop custom FinTech software?
The costs depend on the scope of functionality, complexity, and the systems to be integrated. Since every project is different, we will provide a customized quote following a no-obligation initial consultation.
How long does it take to develop a billing system?
Depending on the scope, this can range from a few months for focused solutions to a year or longer for complex, fully integrated platforms.
Which payment and billing providers can be integrated?
We integrate with popular payment and billing providers, such as Adyen, Braintree (PayPal), Payone, billwerk, BillingPlatform, and Zuora, as well as other systems via custom interfaces.
How secure is sensitive financial data in individual FinTech software?
We rely on encrypted data processing and develop our systems in accordance with applicable regulatory and data protection requirements to reliably protect sensitive financial data.
Can existing billing systems be replaced or expanded?
Yes, we develop both new billing platforms and enhancements and interfaces for existing systems without interrupting ongoing processes.
What technologies underpin IT Sonix's FinTech solutions?
These include Microsoft Azure (Azure Functions, Azure Event Hub, Azure Resource Manager), PostgreSQL, and Elasticsearch, as well as Docker for local testing environments.
What services does IT Sonix offer beyond development alone?
In addition to front-end and back-end development, we also provide project management based on DevOps principles, as well as support in product management, marketing, sales, and customer support, upon request.
Get Started on Your Project
Sebastian Wetzel