Banking
From core integrations to slick mobile banking, we build financial systems that are fast, compliant and dependable , with security designed in from day one.
- 5M+/day
- transactions / day
- <100ms
- transaction latency
- −40%
- fraud losses
What we build for you
Specific deliverables we engineer for this sector.
Core banking modernisation
Secure API layers over legacy cores, enabling new digital products without ripping out existing infrastructure.
Digital banking apps
Mobile-first apps in Flutter or React Native with biometric auth, instant transfers and card management.
Real-time payments
High-throughput payment engines and ISO 20022 switches handling millions of transactions daily at sub-100ms latency.
AI fraud & risk detection
Real-time scoring models that flag suspicious activity before money moves, with full explainability for regulators.
The challenges
- Real-time reliability with zero tolerance for downtime or data loss.
- Heavy regulatory and compliance obligations (KYC, AML, audit).
- Aging core systems that are risky and slow to integrate with.
How we help
- Event-driven architecture with strong consistency and observability.
- Compliance and audit baked into every workflow, not bolted on.
- Secure API layers that modernise the core without ripping it out.
How we deliver
Our battle-tested approach, adapted to this industry's constraints.
- 01
Regulatory & risk assessment
We map every PCI DSS, KYC/AML and audit obligation before touching the architecture.
- 02
Core integration design
We design the API gateway and event bus that binds new features to the legacy core without service disruption.
- 03
Secure, tested build
TDD, penetration testing and threat-modelling baked into every sprint, not done as a final phase.
- 04
Monitored production rollout
Blue-green deployment, feature flags and live SLO dashboards so every rollout is reversible and observable.
Selected work
A look at projects we've shipped in this space , real outcomes, production systems.
- Atlas Commercial Bank
A mobile-first banking experience with instant transfers, cards and insights.
FlutterSecurityPayments - Meridian Retail BankAI
A high-throughput payments core handling millions of transactions a day.
ScalaEvent-drivenPostgreSQL - Sahel Microfinance
Real-time scoring that flags suspicious activity before money moves.
MLStreamingRedis - Atlas Commercial Bank
A mobile-first banking experience with instant transfers, cards and insights.
FlutterSecurityPayments - Meridian Retail BankAI
A high-throughput payments core handling millions of transactions a day.
ScalaEvent-drivenPostgreSQL - Sahel Microfinance
Real-time scoring that flags suspicious activity before money moves.
MLStreamingRedis - Atlas Commercial Bank
A mobile-first banking experience with instant transfers, cards and insights.
FlutterSecurityPayments - Meridian Retail BankAI
A high-throughput payments core handling millions of transactions a day.
ScalaEvent-drivenPostgreSQL - Sahel Microfinance
Real-time scoring that flags suspicious activity before money moves.
MLStreamingRedis
- Continental Bank
Open-banking API gateway with consent management and rate limiting.
APIsOAuthKubernetes - PayStream
Real-time payments switch handling ISO 20022 at national scale.
ScalaKafkaRealtime - Horizon Credit Union
Member mobile app with instant onboarding and KYC.
FlutterKYCOnboarding - Continental Bank
Open-banking API gateway with consent management and rate limiting.
APIsOAuthKubernetes - PayStream
Real-time payments switch handling ISO 20022 at national scale.
ScalaKafkaRealtime - Horizon Credit Union
Member mobile app with instant onboarding and KYC.
FlutterKYCOnboarding - Continental Bank
Open-banking API gateway with consent management and rate limiting.
APIsOAuthKubernetes - PayStream
Real-time payments switch handling ISO 20022 at national scale.
ScalaKafkaRealtime - Horizon Credit Union
Member mobile app with instant onboarding and KYC.
FlutterKYCOnboarding
Compliance & trust
Every banking system we ship is PCI DSS compliant, pen-tested, and auditable by design — compliance is in the code, not the docs.
Testimonials
What leaders in this sector say
Real outcomes from the teams we've partnered with.
“Our core payments engine, re-engineered by HIIS in Scala and Kafka, clears five million transactions a day at sub-100ms latency. It has stayed rock-solid through every peak.”
Sophie LaurentChief Technology Officer · Atlas Commercial BankBanking“The mobile banking app HIIS shipped in Flutter feels instant, and their real-time AI fraud-scoring models caught threats we were missing, dropping fraud losses by 40%.”
David OkekeHead of Digital Banking · Meridian Retail BankBanking“Compliance and audit were baked into every workflow, never bolted on. HIIS understood banking regulation as deeply as they understood the code.”
Fatima BensaïdChief Operating Officer · Sahel MicrofinanceBankingHave a project in mind?
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