Trusted by Europe's leading organizations
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.
Trusted by Europe's leading organizations
Billing is not just another IT system. It is where your operations meet your revenue stream. Off-the-shelf software rarely captures the complexity of enterprise pricing models. DNA Solutions builds resilient charging engines that scale with your transaction volume while holding micro-cent precision, so revenue leakage never happens.
DNA Solutions designs technology that lands on your bottom line. European enterprises trust us with extreme data volumes and critical financial pipelines.
See client resultsDNA Solutions built and maintains a Deloitte-audited billing platform processing €300M in audited transactions every month.
By optimizing software licensing fees for a major European organization, DNA Solutions delivered over €1M in yearly cost savings.
A senior team of engineers and consultants across Europe.
T-Systems, Satellic, European Commission: our longest engagements last because we deliver.
A charging engine is judged on the transactions it never gets wrong. The steps below are built around that, end to end.
Floating-point errors are unacceptable in billing. We architect our rating engines using strict decimal types and immutable event ledgers, ensuring that millions of micro-transactions aggregate perfectly without a single cent of rounding discrepancy. This rigorous approach to data types ensures absolute compliance during external financial audits, including Deloitte-grade reviews, and guarantees that every transaction is fully traceable back to its originating event, no matter the volume.
A billing engine is useless if it doesn't talk perfectly to your general ledger. We build robust reconciliation pipelines such as BridgeSync that feed directly into SAP, AFAS, or custom ERP solutions, automating daily financial closing and eliminating manual data entry. Our integration layers include built-in fallback mechanisms, dead-letter queues, and automatic retry policies so that a temporary downtime on your ERP side never results in lost financial data.
We decouple the ingestion of usage data from the actual invoice generation using advanced event streams such as Kafka or RabbitMQ. This means your platform can ingest thousands of events per second without slowing down the end-of-month invoicing process. When peak loads hit, for instance during a massive influx of tolling telemetry, our asynchronous architecture scales horizontally to process the queue smoothly, ensuring that core operations are never impacted.
Revenue assurance is built into the platform, not bolted on afterwards. 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. Every event is stored in an append-only log with full lineage, so each line of an invoice can be traced back to its originating event. This is what lets our platforms pass external financial audits, including Deloitte-grade reviews, without scrambling to reconstruct data after the fact.
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 buildDistributed 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.
Seamless integration with your core financial systems. We build robust BridgeSync pipelines that automate data transfer into SAP, AFAS or custom ERPs, removing manual data entry and accelerating month-end closing.
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.
Telecom, tolling and mobility each bill on their own events and rules. The rating and reconciliation core stays; what surrounds it changes by sector.
High-volume CDR rating, real-time charging and OSS/BSS modernization for operators billing millions of subscribers without revenue leakage.
Rating of GPS and gantry events into unified, cross-border invoices, with the tax and settlement rules each country and consortium requires.
Per-trip, per-asset and subscription billing for mobility and fleet platforms, reconciled with the operational data that drives every charge.
How we rate and invoice millions of transactions for European enterprises.
A scalable microservices architecture that rates high volumes of GPS events and applies multi-country tax rules to generate unified invoices.
Rating pipeline, multi-country
A single payment gateway unifying transactions across a multi-product platform, with reconciliation built in.
One gateway, every productSenior decision-makers on the billing, tolling and financial platforms DNA Solutions has delivered.
"DNA works with us to deliver digital systems at scale so that we can serve our customers digitally. They are both reactive to requests and proactive with ideas and proposals."
"I appreciated the collaborative spirit and the effort to deliver a reliable solution within a reasonable budget. The step-by-step approach with a demo before deployment made all the difference."
"DNA Solutions has delivered online tools that have made the client's employees and customers' lives easier. For instance, the client can now handle cases in a maximum of two days instead of five."
What enterprises ask before committing to a custom charging 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.
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 favour an open-source stack (Java, PostgreSQL, Kafka) so there are no proprietary licences 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.
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.
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.