Custom Software Engineering & Fintech Platforms | Lagos & West Africa
Onesign Concept architects resilient digital infrastructure, automated payment gateways, and high-throughput web applications for ambitious enterprises, financial services, and scaling startups across Lagos and Nigeria.
Nigeria
Active sprint ceremonies, real-time code reviews, and overlapping working hours.
Fintech & Payments · Logistics & Supply Chain · E-Commerce · Enterprise Digitalization
Resilient Multi-Currency Payment Integrations & Financial Workflows
We engineer fault-tolerant transaction processing pipelines integrating Paystack, Flutterwave, Interswitch, direct NIBSS bank rails, Stripe, and PayPal. Our webhook reconciliation engines feature automated idempotency, dual-entry ledgers, and real-time fraud alerts.
Engineered for High-Volume Concurrency & Variable Connectivity
African markets demand robust architectures that thrive in fluctuating network conditions. We design edge-cached Next.js applications, progressive web apps (PWAs), and offline-first mobile apps with minimal data footprints, sub-second TTFB, and automatic background data synchronization.
Fractional CTO Advisory, Enterprise Retainers & Staff Augmentation
Beyond code delivery, we provide senior architectural direction, security audits, database optimization, and dedicated sprint squads to help corporate institutions and funded ventures scale without technical debt.
Working with Onesign Concept in Lagos
Which payment processors and banking APIs do you support?
We build native integrations for Paystack, Flutterwave, Interswitch, Monnify, PayPal, Stripe, and direct bank transfers with automated webhook reconciliation and instant payment notification (IPN) handlers.
How do your solutions comply with NDPR (Nigeria Data Protection Regulation)?
We implement granular access controls, multi-factor authentication, audit trails, and encrypted database storage complying fully with NDPR and international data protection standards.
Do you offer post-launch support and monthly engineering retainers in Nigeria?
Yes. Our monthly engineering retainers provide guaranteed senior engineering capacity, continuous security patches, performance monitoring, and rapid bug resolution under strict SLA contracts.
Build Your Scalable Digital Platform in Lagos
Partner with experienced software architects to build resilient web platforms, mobile solutions, or automated payment engines.