FINTECH SOFTWARE SERVICES

Engineering Around Real Product Flows

ClearClients builds payment infrastructure, fintech applications, backend APIs, cloud systems, delivery pipelines and AI integrations around the way the software must actually operate.

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SERVICE 01

Payment APIs & Gateways

Build payment services and integrations for M-Pesa, mobile money, financial platforms and digital applications.

PROBLEM

Payment products often become fragile when transaction initiation, callbacks, retries and reconciliation are handled as separate pieces.

SOLUTION

We engineer the payment flow as one system, from API contracts and transaction states through callbacks, validation and operational controls.

PROOF

M-Pesa gateway live application
Interactive API documentation
Webhook and callback handling
Automated CI/CD deployment

M-PesaDarajaSTK PushWebhooksIdempotencyReconciliation

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SERVICE 02

Backend & API Development

Design and build secure REST APIs, backend services, microservices and enterprise integrations.

PROBLEM

Frontend products cannot remain reliable when core business rules, integrations and data access are tightly coupled or poorly tested.

SOLUTION

We design API-first backend services with clear contracts, validation, service boundaries, database models and automated tests.

PROOF

FastAPI production projects
JWT-protected banking API
Swagger/OpenAPI documentation
Automated API test suites

PythonFastAPIJavaSpring BootNode.jsPostgreSQL

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SERVICE 03

Cloud Engineering

Design and deploy applications and infrastructure on modern cloud platforms with security and reliability in mind.

PROBLEM

Applications become difficult to operate when deployment, infrastructure and monitoring depend on undocumented manual steps.

SOLUTION

We structure cloud environments around repeatable deployments, containerized workloads, health checks, logging and operational visibility.

PROOF

Containerized deployments
Infrastructure configuration in source control
Health checks
Cloud-hosted portfolio applications

Microsoft AzureAWSContainersNetworkingMonitoring

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SERVICE 04

AI Engineering

Integrate modern AI capabilities into software products, engineering workflows and operational systems.

PROBLEM

AI features fail when they sit outside the product workflow, lack review controls or cannot connect safely to business data and tools.

SOLUTION

We integrate AI as a controlled application layer with prompts, APIs, human review, validation and production workflows.

PROOF

LLM evaluation workflows
Multi-model integrations
AI-assisted automation
Human-reviewed output patterns

OpenAIChatGPTCodexClaudeGeminiLLMOps

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ALL CAPABILITIES

Software Engineering Services

The full service set stays focused on software development and fintech delivery.

Payment APIs & Gateways

Build payment services and integrations for M-Pesa, mobile money, financial platforms and digital applications.

M-PesaDarajaSTK PushWebhooksIdempotencyReconciliation

Fintech Applications

Develop financial platforms, transaction systems, payroll applications, reporting tools and operational software.

PaymentsTransactionsPayrollReportingDashboards

Backend & API Development

Design and build secure REST APIs, backend services, microservices and enterprise integrations.

PythonFastAPIJavaSpring BootNode.jsPostgreSQL

Cloud Engineering

Design and deploy applications and infrastructure on modern cloud platforms with security and reliability in mind.

Microsoft AzureAWSContainersNetworkingMonitoring

DevOps & CI/CD

Automate software delivery through repeatable build, test, deployment and infrastructure workflows.

GitHub ActionsGitLab CIJenkinsDockerKubernetesTerraform

AI Engineering

Integrate modern AI capabilities into software products, engineering workflows and operational systems.

OpenAIChatGPTCodexClaudeGeminiLLMOps

SOFTWARE DELIVERY

SDLC From Requirement to Operation

Each phase produces a concrete engineering output, so design decisions, code, tests and deployment stay connected.

Plan

Requirements, transaction flows, constraints, risks and success criteria.

Design

Architecture, API contracts, data models, security controls and user flows.

Build

Backend services, interfaces, integrations, infrastructure and automation.

Test

Unit, API, integration, failure-path and security validation.

Deploy

CI/CD, containers, environment configuration and health checks.

Operate

Logs, monitoring, incident response, updates and performance improvements.

Have a Payment, Fintech or Backend Problem to Solve?

Share the current system, required integration and expected outcome.

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