How does Keyhole ensure financial software is secure and compliant?

Security and compliance are embedded into every stage of development. We design solutions that align with FFIEC, PCI DSS, SOX, and GDPR standards, using encryption, role-based access control, and secure authentication protocols like OAuth2 and JWT. We also perform code reviews and vulnerability scans to protect sensitive financial data.

Banking & Financial Services

Software Development.

Senior Software Experts for Financial Services & Banking

Our U.S.-based senior engineers help financial organizations modernize legacy platforms, build secure digital banking experiences, and ensure regulatory compliance with frameworks like SOX, PCI-DSS, GLBA, and FFIEC. We deliver modern architectures that improve scalability, customer trust, and operational efficiency.

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Keyhole Experts Have Been Trusted by 250+ Financial & Enterprise Organizations

Custom Software Solutions for Banks, Credit Unions & FinTechs

Our team of 100% U.S.-based senior software engineers brings deep experience across core banking, payments, digital channels, and data platforms. We understand the challenges of regulatory complexity, uptime reliability, and customer trust.

Core Banking & Digital Platforms

Modernize monolithic systems and transition to modular microservices for account management, lending, deposits, and payments. Build responsive, secure digital banking interfaces that keep your customers connected.

Payment & Transaction Processing

Implement secure, high-volume transaction pipelines for ACH, wire transfers, and real-time settlement. Our engineers integrate tokenization, reconciliation, and fraud-detection capabilities to protect sensitive data at every step.

Legacy System Modernization

Replatform COBOL, .NET, and Java systems into cloud-native architectures on AWS or Azure. We design modernization roadmaps that reduce risk while unlocking scalability and automation.

Data Aggregation & Reporting

Enable real-time dashboards and analytics for treasury operations, compliance reporting, and customer insights. We help unify fragmented data across platforms to improve visibility and decision-making.

We’ve built, modernized, and integrated systems that power core banking operations, payment processing, data aggregation, and digital lending platforms that are aligned with SOX, PCI-DSS, GLBA, and FFIEC guidelines.

Why Choose Keyhole for Financial Software Development?

Award Seal for Top IT Services Company in Financial Services in Kansas 2025 by Clutch

Award Seal for Top Software Developers in Financial ServicesAward in Kansas by Clutch

The Keyhole Difference

Our Experts Drive FinTech Results

We’ve built, modernized, and integrated systems that power core banking, digital lending, payment processing, and data aggregation—each aligned with SOX, PCI-DSS, GLBA, and FFIEC guidelines.

Nearly two decades of company experience supporting banks, credit unions, and financial enterprises

Senior consultants averaging 17+ years of professional experience

U.S.-based, 100% senior-level engineers—no junior outsourcing

Proven in regulated environments: banking, insurance, wealth management

We plug in quickly, deliver quality from day one, and elevate internal teams through collaboration and knowledge transfer.

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Video Highlight

video for working with expert keyhole financial consultants

Learn what to expect when working with a Keyhole consultant—how we work with your team & the benefits of our experience and communication.

Why Clients Trust Keyhole

We modernize systems using industry-leading frameworks and proven design patterns.

At Keyhole Software, trust is built on expertise, transparency, and a commitment to delivering real results. Our team consists of experienced software architects and developers who specialize in enterprise, microservices, cloud-native solutions, and legacy system modernization.

With decades of hands-on fintech experience, we don’t just follow industry best practices—we help shape them. Our software developers have worked on banking and financial software development solutions every day since Keyhole was established in 2008.

Honest communication and realistic timelines from experienced professionals.

Clients also trust Keyhole because of our unwavering commitment to honesty and transparency. We don’t overpromise—we provide realistic assessments, clear communication, and measurable outcomes. From modernizing complex legacy systems to architecting cutting-edge cloud solutions, we take the time to understand each organization’s unique challenges and tailor solutions that align with their business goals.

Our reputation has been built on delivering quality software, mitigating risk, and ensuring our clients get the best return on their technology investments.

We don’t just deliver software; we strengthen your in-house teams.

Beyond technical excellence, Keyhole Software prioritizes collaboration and knowledge transfer. We don’t just deliver solutions—we empower teams by mentoring in-house developers, introducing best practices, and fostering a culture of continuous learning.

Whether working as an embedded team or providing strategic consulting, we ensure that our clients have the tools and understanding needed to maintain and evolve their software long after our engagement ends. This approach fosters long-term relationships built on trust, knowledge, and proven success.

Recent Financial Software Success Stories

With nearly two decades of partnership with leading banks, credit unions, and investment firms, Keyhole Software has delivered measurable results through modernization, cloud migration, and secure digital transformation.

Here are a handful of examples from our vast experience working in the financial sector:

cloud native modernization for b2b payment company

Cloud Native Modernization: To Vue.js + Node.js with AWS

A global B2B payments provider partnered with Keyhole to modernize a 15-year-old legacy application into a cloud-native, multi-tenant platform built on Vue.js, Node.js and AWS.

A team of four senior Keyhole consultants played a pivotal role in a large-scale modernization effort, driving performance, scalability, and innovation through:

Rebuilding core functionality in a modern Vue.js front-end and Node.js microservices architecture deployed on AWS S3, CloudFront, and Kubernetes.
Automating delivery pipelines with GitLab CI, Docker, and Terraform to ensure fast, consistent, and secure deployments.
Leveraging AWS services such as Cognito, Lambda, and Step Functions to enable elastic scalability and streamlined integration.
Elevating the user experience by prototyping new portal interfaces and expanding the design system for application consistency.

Learn About Project

asset management brokerage modernization initiative

Modernizing COBOL Batch Processing To Java

Keyhole partnered with a leading investment & asset management firm to modernize mission-critical COBOL batch systems. Through a long-term collaboration spanning over a decade, our senior consultants rebuilt complex investment operations workflows.

Across multiple engagements between 2011 and 2025, Keyhole teams helped the client evolve from legacy COBOL systems to a modern, agile environment built on the Spring ecosystem.

Converted hundreds of COBOL batch processes into Spring Batch applications supporting fee calculations, vendor payments, and fund reconciliations.
Created a Spring Boot File Delivery Service to centralize vendor file transfers with a secure, configuration-driven platform.
Rebuilt End-of-Day and Fund Reconciliation workflows for faster, more accurate data validation.
Introduced automated testing, mentoring, and agile best practices to strengthen internal development and QA capabilities.

See Case Study

payment management system with react for banking

Custom Payment Management System with .NET and React

This project was one of many successful collaborations with a nationally recognized banking institution—a trusted Keyhole client for more than eight years—built using React and .NET Core.

A seven-member Keyhole team collaborated with the client’s developers and business stakeholders to design and implement a secure, scalable application that digitized healthcare payment operations.

Developed a React-based web interface with intuitive workflows for managing and tracking payments.
Engineered a custom .NET Core backend and REST APIs, including daily file processing utilities for incoming client data.
Used Azure SQL Server for data management and Enzyme, NUnit, and Swagger for automated testing and documentation.

The new system simplified healthcare payment processing, reducing manual work and improving reconciliation accuracy across partner institutions.

By delivering a secure, modern application built on React, .NET Core, and Azure, Keyhole strengthened its long-standing relationship with the bank—proving its ability to consistently deliver scalable, enterprise-grade financial software solutions that meet business goals with precision and reliability.

Learn About Project

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Most Recent Financial Client Successes

Case Study: Modernizing Enterprise Batch Processing for a Financial Institution

Modernizing a Legacy Mobile Application for Fuel Order Management With Flutter

Modernizing a Complex Financial Management Platform with React

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Technologies & Platforms We Excel In

Technologies and Tools That Our Team Has Used Recently

We work with the same trusted, enterprise-grade technologies found across banking and financial ecosystems — ensuring every application we build is secure, compliant, and integration-ready with your existing infrastructure.

This is only a small subset of the technologies we leverage as a company for our clients. We’d be pleased to discuss your technology stack and provide personalized recommendations on architecture, modernization strategies, and implementation approaches tailored to your financial organization’s goals.

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Recent Thought Leadership

For FinTech Organizations

A core tenet of the Keyhole philosophy is knowledge sharing—we’re lifelong learners who believe that expertise grows when it’s shared. With 1,000+ articles and resources authored by our senior consultants, our commitment to learning and transparency empowers both our team and our clients to build smarter, more resilient financial software solutions.

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legacy system modernization for payment processing SaaS

Recent Project Success

Keyhole conducted an architectural assessment to guide the client’s migration from a legacy Ember.js and Rails monolith to a microservices architecture.

After the roadmap’s success, the client re-engaged Keyhole for the modernization effort—successfully rebuilding the system as a library of React SPAs within a new Nx/Vite monorepo hosted on AWS.

Learn About Project

Use Cases & Solutions for Financial Institutions

Many financial institutions rely on custom software development to stay competitive, meet compliance standards, and serve customers more effectively. Keyhole Software consultants have driven success for organizations ranging from large national banks to emerging fintech startups—delivering tailored solutions that help them innovate securely, modernize efficiently, and scale with confidence.

Our expertise extends across every corner of the financial ecosystem:

Custom software helps banks and credit unions streamline operations, enhance customer experiences, and ensure regulatory compliance.

From secure mobile banking applications and loan origination systems to automated workflows and fraud detection tools, Keyhole Software builds solutions for banks and credit unions that strengthen reliability and performance.

Common Use Cases For Banks & Credit Unions: Digital banking modernization, API-driven integrations, and enhanced customer experience platforms.

Fintech startups and established financial innovators rely on flexibility and speed. Keyhole consultants design secure, scalable applications for payment processing, personal finance management, digital wallets, and blockchain-based platforms — empowering companies to launch quickly and scale confidently.

Common Use Cases For FinTech Companies: Rapid MVP builds, secure cloud infrastructure, and scalable payment architectures.

These organizations often need advanced analytics, portfolio management tools, and data-driven dashboards. Custom software enables faster insights, risk management automation, and integration across trading, compliance, and reporting platforms — ensuring accurate and timely decisions.

Common Use Cases For Investment & Wealth Management Firms: Portfolio management tools, reporting engines, and data visualization for informed decision-making.

We've provided consulting services to more than 250+ happy clients

Here are some frequently asked questions our financial services clients have had:

See Our Clients

View Our Successes

We offer flexible engagement models to meet your project’s unique needs:

Software Outsourcing
Our project management + software development team builds end-to-end solutions for you.

Dedicated Dev Teams
A fully integrated, dedicated consulting team works continuously on your long-term project.

Fractional & Advisory Services
Our senior software leaders provide strategic guidance to drive digital transformation.

Staff Augmentation
Our developers and specialized experts join your team to accelerate development.

Whether you need a full team to build a custom application, expert consultants to integrate with your existing team, or strategic guidance to modernize a legacy system, our U.S.-based, vetted consultants provide the right expertise at the right time.

Learn More

Yes. We have extensive experience connecting financial systems with APIs for data aggregation, payment processing, and CRM management. Common integrations include Plaid, PayPal Finicity, Salesforce, Fiserv, and FIS, enabling seamless data flow across your ecosystem.

We also integrate with enterprise platforms such as SAP, Azure, AWS, Salesforce, and others to align with each organization’s technology stack and regulatory obligations.

We are technology-agnostic but experienced across all major cloud providers — Amazon Web Services, Microsoft Azure, and Google Cloud — as well as SAP BTP for enterprise environments. We help clients choose the right platform based on security, scalability, and cost-efficiency.

We are also proud to be both a Gold Microsoft Competency Partner and AWS Consulting Partner, designations that reflect our proven technical expertise, successful project delivery, and strong client satisfaction directly recognized by the cloud providers themselves.

Financial clients choose Keyhole for our deep technical expertise, hands-on senior consultants, and collaborative approach. Every engagement is led by seasoned developers who understand the complexity of financial environments — from regulatory requirements to real-time data demands — and who deliver secure, maintainable solutions without unnecessary overhead.

Keyhole Software is 100% U.S.-based, with consultants averaging 17+ years of professional experience and 5+ years of tenure with our team. This model ensures consistency, security, and seamless collaboration across all client engagements.

Start Your Financial Software Transformation

Whether you’re modernizing legacy systems, scaling payment operations or building your next-gen trading platform — we’re ready when you are.

Start The Conversation

Banking & Financial Services

Software Development.

Senior Software Experts for Financial Services & Banking

Keyhole Experts Have Been Trusted by 250+ Financial & Enterprise Organizations

Custom Software Solutions for Banks, Credit Unions & FinTechs

Core Banking & Digital Platforms

Payment & Transaction Processing

Legacy System Modernization

Data Aggregation & Reporting

Why Choose Keyhole for Financial Software Development?

The Keyhole Difference

Video Highlight

Why Clients Trust Keyhole

Recent Financial Software Success Stories

Cloud Native Modernization: To Vue.js + Node.js with AWS

Modernizing COBOL Batch Processing To Java

Custom Payment Management System with .NET and React

Related Services

Enterprise Modernization

Cloud Native Consulting

Microservices Consulting

Most Recent Financial Client Successes

Case Study: Modernizing Enterprise Batch Processing for a Financial Institution

Modernizing a Legacy Mobile Application for Fuel Order Management With Flutter

Modernizing a Complex Financial Management Platform with React

Technologies & Platforms We Excel In

Technologies and Tools That Our Team Has Used Recently

Application Development

Data & Interactions

Cloud & Infrastructure

Security & Compliance

Recent Thought Leadership

Best Practices for Secure Java Development in Regulated Industries

Modernizing Cobol Applications

Nacha ACH Payroll: How Getting Paid Works

Recent Thought Leadership

Long-Running Workflows Made Simple with C# + Azure Durable Functions

Best Practices for Secure Java Development in Regulated Industries

Monolith to Microservices: Key Challenges and How to Overcome Them

Recent Project Success

Use Cases & Solutions for Financial Institutions

We've provided consulting services to more than 250+ happy clients

Here are some frequently asked questions our financial services clients have had:

Start Your Financial Software Transformation

Company

services

tech

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