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Payment & billing infrastructure

The backend that moves money without breaking.

We build payment integrations, webhook infrastructure, reconciliation engines, and billing automation for B2B SaaS platforms — the systems where a single silent failure costs real revenue.

Book a free 15-minute call → See what we've built
15,000+
transactions processed daily in production
10+
payment provider integrations delivered
10k+
concurrent users served without lag
Multi-market
regulatory compliance reporting
What we build

Money infrastructure, handled end-to-end.

Four things we do better than a generalist ever will — because we've shipped each one in production, under real load.

01

Payment provider integration

Connect your platform to any provider — cards, wallets, bank transfers, alternative rails. We handle the full lifecycle: deposits, withdrawals, webhook processing, balance accuracy, and reconciliation. Every edge case covered, every failure mode planned for.

02

Webhook & event infrastructure

Idempotent handlers, retry logic, and status-check workers that guarantee no payment event is ever lost or processed twice — even when a provider's webhook never arrives. The layer that makes everything else reliable under real load.

03

Billing & revenue recovery

Subscription logic, failed-payment retry flows, smart dunning, and card-updater integration. The infrastructure that stops involuntary churn from quietly draining your recurring revenue every single month.

04

Reporting & compliance automation

Scheduled workers that deliver financial reports, regulatory submissions, and client-facing analytics automatically — in the exact format each consumer needs. Month-end close in hours, not days.

Proof

Built in production. Not in tutorials.

Every system below runs live, at scale, handling real money for platforms that cannot afford for it to fail.

Payment infrastructure for a high-volume platform

A regulated platform needed reliable deposits and withdrawals across card processors, digital wallets, and physical voucher networks redeemable at retail.

We built the payment layer end-to-end: provider integrations, idempotent webhook handlers, database-level locks that eliminate race conditions on player balances, and background workers that automatically resolve transactions left pending by unreliable provider webhooks.

Result

Up to 15,000 transactions a day across every provider — accurate balances, zero race conditions, no permanently stuck payments.

Payment integrationWebhooksReconciliationBackground workers

Third-party integration layer for a live platform

The platform needed to connect users to external services from dozens of independent providers — each with its own API, authentication, and callback structure.

We built a unified integration layer covering the full session lifecycle: authentication, real-time balance debits and credits, complete transaction logging, live data feeds from external systems, and promotional flows wired into the platform's internal engine.

Result

Dozens of providers connected and reliable — consistent, accurate behaviour for users no matter which provider served the session.

API integrationBalance managementTransaction loggingBackground workers

Compliance & reporting engine, multi-market

A platform across several regulated markets had to serve three audiences at once: clients needing real-time financial visibility, a marketing team needing behavioural data, and regulators requiring mandatory submissions as a condition of the licence.

We built a dual-mechanism system: scheduled workers delivering external reports automatically, plus an on-demand query engine for internal users. Financial performance, activity summaries, and jurisdiction-specific regulatory reports — all generated without manual work.

Result

Regulatory reports delivered automatically across every market — removing the compliance risk that missed submissions would have turned into fines or a suspended licence.

ReportingComplianceScheduled workersData pipelines

Event-driven processing at high concurrency

The platform needed to process user activity in real time across tens of thousands of simultaneous users, evaluate eligibility conditions, and distribute rewards automatically — with several independent programs running at once.

We built a background-worker engine: configurable condition evaluation, real-time state tracking across tens of thousands of concurrent users, multiple simultaneous independent programs, and automatic reward distribution the instant conditions were met — all asynchronous, so user-facing performance was never touched.

Result

High-concurrency processing across tens of thousands of simultaneous users — no lag, no manual operation, instant distribution on completion.

Event processingHigh concurrencyBackground workersRules engine
How it works

Three steps. Weekly proof. No surprises.

STEP 01

Tell us what you need

Book a 15-minute call. We ask about your current payment setup, where things break or fall short, and what's on your roadmap. No pitch — just a clear diagnosis.

STEP 02

We scope, then ship in sprints

You get a fixed-scope proposal within 48 hours. Work happens in two-week sprints with shippable progress every week — you see working, tested code, not status updates.

STEP 03

It works, reliably

Tested end-to-end in your environment before anything touches production. Documented and monitored. Stay on with us as your fractional payments engineer if you want it handled long-term.

Working, shippable progress every week — or that week is free.

A studio built around one hard problem: moving money reliably.

Neverasoft is a boutique software studio focused on payment and billing infrastructure for B2B SaaS platforms. We've built payment systems, third-party integration layers, compliance reporting engines, and high-concurrency processing for live, regulated platforms handling tens of thousands of transactions a day.

We take on a small number of clients at a time, so every engagement gets full engineering focus. We work primarily with .NET and PostgreSQL backends, and integrate with platforms across stacks.

Is your billing where it needs to be?

If payments, webhooks, reconciliation, or billing logic are on your roadmap — or quietly causing problems — book a free 15-minute call. We'll tell you exactly what we'd fix first.

Book a free 15-minute call →