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Revenue-assured billing platforms

DNA Solutions designs, builds and maintains high-volume billing and charging engines. Our custom platforms process hundreds of millions of euros every month, with absolute revenue assurance and full compliance with European regulations.

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Engineering for reliable revenue assurance

Billing is not just another IT system. It is where your operations meet your revenue stream, and off-the-shelf software rarely captures the complexity of enterprise pricing models.

We build charging engines on strict decimal types and immutable event ledgers, so millions of micro-transactions aggregate without a cent of rounding error, and every invoice line traces back to its originating event. That is the revenue assurance discipline that lets our platforms pass Deloitte-grade audits.

DNA Solutions by the numbers

We design technology that lands on your bottom line. European enterprises trust us with extreme data volumes and critical financial pipelines.

A senior team of engineers and consultants across Europe.

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€1M

Annual savings across European clients

Software licensing savings of up to €1M per year for some of our clients.

€300M

Monthly audited transactions

We built and maintain a Deloitte-audited billing platform processing €300M in audited transactions every month.

6 years

Long-term client relationships

Several clients have worked with DNA Solutions for six years. We continue to develop and support their software as their needs evolve.

Our approach to billing architecture

A charging engine is judged on the transactions it never gets wrong. The steps below are built around that, end to end.

Micro-cent precision rating

Floating-point errors are unacceptable in billing. Our rating engines use strict decimal types and immutable event ledgers, so millions of micro-transactions aggregate without rounding discrepancies. Every transaction remains traceable to its originating event, supporting external financial audits, including Deloitte-grade reviews.

Seamless SAP & ERP integration

We connect ERP and business applications through an integration layer. Data validation, format translation and traceable exception handling support consistent records and reduce manual transfers. Failed records can be reviewed and corrected without replaying the whole exchange, while clear ownership and monitoring help teams maintain the connection over time.

Event-driven architecture

We decouple usage-data ingestion from invoice generation with event streams such as Kafka or RabbitMQ. The platform can ingest thousands of events per second without slowing month-end invoicing. During telemetry peaks, the asynchronous architecture scales horizontally to process the queue without affecting core operations.

Revenue assurance & audit readiness

Revenue assurance is designed into the platform from day one. We reconcile every stage of the pipeline, from ingestion to rating, invoicing and final ledger posting, with automated checks that flag any mismatch in count or value before an incorrect invoice ever goes out.

Billing systems delivered by DNA Solutions

DNA Solutions engineers complete end-to-end billing architectures for high-volume enterprises. From event mediation to complex rating and ERP synchronization, our platforms are built to process millions of transactions flawlessly.

What We Build

High-frequency rating engines

Distributed rating engines that evaluate thousands of usage events per second. Strict decimal typing and immutable ledgers guarantee micro-cent precision on complex tiered pricing, with zero rounding errors.

ERP & ledger reconciliation

Billing results are posted to the ERP and the general ledger, then reconciled with the platform. Automated checks compare counts and values on both sides and flag any mismatch for review.

Event mediation streams

We decouple data ingestion from invoice generation using event-streaming architectures (Kafka, RabbitMQ). This asynchronous design absorbs massive telemetry spikes without ever impacting core invoicing performance.

What clients and partners value about DNA Solutions

Selected reviews from clients and partners about working with DNA Solutions.

"Collaboration with DNA is great they listen and know our industry inside out and they are both reactive to requests and proactive with ideas and proposals"
Peter HopkinsHead of financial platforms Tolling, T-Systems Road ChargingSortlist · 2025-11-24

Questions before choosing a charging engine

What enterprises ask before committing to a custom charging engine.

How long does it take DNA Solutions to deploy a custom billing engine?

Deployment timelines depend on your existing legacy infrastructure and integration requirements. A focused proof-of-concept for a specific transaction flow typically takes 8-12 weeks, enough to validate the rating logic and the integration points on your real data before any wider commitment. Full enterprise migration from legacy platforms (like SAP or Oracle) to our modern, event-driven architecture usually spans 12-18 months. We never run a big-bang cutover: our phased approach keeps your existing billing systems fully operational throughout the transition, with the new platform running in parallel and reconciliation reports comparing both outputs at every billing cycle. We only switch a customer segment over once its invoices match to the cent, so revenue and compliance are never at risk during the migration.

Do we own the intellectual property of the billing platform?

Yes. DNA Solutions builds custom software tailored precisely to your enterprise requirements. Upon completion, you own the full intellectual property, including source code, database schemas, infrastructure-as-code and technical documentation. We deploy on your own cloud account or on-premise environment, and we favor an open-source stack (Java, PostgreSQL, Kafka) so there are no proprietary licenses and no vendor lock-in built into the platform. At handover we run a structured knowledge transfer with your engineers, walking them through the architecture, the deployment pipeline and the operational runbooks, so your internal teams can fully operate and extend the platform on their own. Ongoing support remains an option you choose, never a dependency we design in deliberately.

How does DNA Solutions handle multi-country tax regulations?

Our microservices architecture treats tax calculation as a decoupled, specialized service. This lets us apply complex, dynamic VAT rates and regional tax laws (crucial for pan-European tolling and logistics operators) without ever altering the core rating engine. Tax rules live as configuration data, not hard-coded logic, and each rule is time-windowed, so a rate change applies from its effective date without rewriting historical invoices. We keep multi-currency and multi-tax as two distinct concerns, each handled by its own layer, because a country can share a currency while following entirely different tax rules. Every rule change is logged with full audit lineage, so an external auditor can trace exactly which rate applied to which transaction, and when. As European legislation evolves, your team updates a configuration rather than waiting for a new software release.

Can your system integrate with our legacy Oracle databases?

Absolutely. Our team brings over 15 years of deep expertise maintaining and migrating legacy Oracle systems across European telecom and infrastructure platforms. We start with a licensing and schema audit, which on large Oracle estates often surfaces 20-40% of removable cost, then build secure integration layers and ETL pipelines that bridge your on-premise databases with a modern, cloud-native billing platform. We rely on Change Data Capture for continuous synchronization and on parallel validation scripts that compare source and target row by row, so the migration runs with zero data loss and remains fully reversible until you are ready to switch over. Where it makes sense, we map Oracle workloads onto PostgreSQL or a cloud-managed database to exit licensing costs entirely, rather than carrying them into the new platform.

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billing infrastructure

A short call to discuss your current transaction volumes and integration challenges, with no obligation. We respond within one business day.

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