How Businesses Can Handle Peak Loads: A Modern Approach to API Management and Scaling

Today, the financial sector, fintech, and e-commerce are evolving at a breakneck pace. We’ve grown accustomed to convenient mobile banking, fast one-click payments, and integrations with dozens of partner services. All of this works thanks to APIs—special digital “bridges” that allow different applications and services to communicate with one another.

However, the more of these bridges a company builds, the more difficult it becomes to manage them. When there’s a massive influx of users — for example, during “Black Friday,” a new product launch, or a large-scale advertising campaign — standard infrastructure may not be able to handle the load. That’s why today, the performance, stability, and manageability of an IT platform are no longer just a concern for programmers, but a matter of preserving a business’s profits and reputation.

Why Don’t the Old Methods Work Anymore?

In the past, ensuring a website’s stability simply required purchasing a more powerful server and setting up basic security measures. But today, application architecture has become much more complex:

• Integration Chaos: Modern businesses use thousands of APIs. Without a single control center, developers lose track of who is using these digital bridges, how they’re being used, and at what intensity.
• Vulnerability to high traffic loads: During seasonal peaks, traditional infrastructure starts to “slow down.” If the system can’t instantly adapt to the number of visitors, customers encounter errors, and the business loses money.
• Upgrade challenges: If an application is a monolithic, inflexible system, any attempt to update a single feature can bring the entire system down.

How Leading Companies Build Sustainable Infrastructure: Real-World Case Studies

Practice shows that when it comes to millions of transactions, simply buying more powerful servers is a temporary Band-Aid, not a cure. Forward-thinking companies don’t wait for their system to “crash” during peak loads; instead, they proactively redesign their architecture so that it can adapt to any challenges on its own.

Case Study 1. Karnataka Bank: Staying Ahead of the Curve and Scaling Up by 50%

India’s Karnataka Bank is a financial institution with a 100-year history and over 13 million customers. When the country experienced a boom in digital payments and the market began demanding instant integrations with hundreds of third-party fintech services, the bank realized that its monolithic infrastructure simply wouldn’t be able to handle such a surge.

They took proactive steps and completely modernized their IT platform. The bank migrated its processes to the modern, elastic Red Hat OpenShift environment and implemented a single IBM API Connect gateway to manage all digital “bridges.”

The results of this transformation speak for themselves:

• Scalability increased by 50%. Now, during sudden spikes in transactions, the system automatically creates new digital containers, handling any high load without disruptions.
• Operating costs decreased by 30% thanks to streamlining integrations.
• Faster time-to-market. New digital products (such as online lending) are now launched significantly faster, as developers use ready-made, secure APIs instead of writing code from scratch.

Case Study 2. Bankart: 45 million transactions per month without a single outage

If Karnataka Bank is an example of modernization, then the European processing center Bankart is a story of stability under enormous load.

The company, which serves 11 banks in Slovenia, faced the need to build a robust platform for Open Banking. The system had to exchange data every second between dozens of banks and their partners.

To prevent the system from “crashing” under the chaos of requests, Bankart built a microservices architecture using Red Hat OpenShift containerization and the IBM API Connect management platform. Today, this combination is the cornerstone of their reliability: it enables services to process over 45 million transactions per month seamlessly and securely, guaranteeing banks and their customers instant access to funds under any circumstances.

Both case studies point to the same conclusion: today, business stability directly depends on architectural flexibility. How exactly can you achieve such seamless operation in practice and avoid overloads? The answer lies in a comprehensive, multi-level approach.

The Right Architecture: How to Ensure Uninterrupted Operation

For applications to run quickly, securely, and without crashing under load, the architecture must be multi-tiered. Instead of trying to solve all problems with a single program, a comprehensive approach is used.

Layer 1. Security Perimeter (NGFW and WAF). Security starts at the perimeter. All requests from the internet first pass through specialized network firewalls. The Next-Generation Firewall (NGFW) filters IP traffic at its level, while the Web Application Firewall (WAF) blocks attacks at the application and business logic levels (for example, vulnerabilities from the OWASP Top 10 list). Only verified, “clean” traffic is allowed to proceed to the internal secure network zone (DMZ).

Level 2. API Management System and API Gateways: IBM API Connect. 

After initial filtering by firewalls, traffic enters a comprehensive management system — IBM API Connect. This solution is deployed in a secure network segment and acts as the central dispatcher.

Direct request processing, security, and traffic control at this level are provided by the API gateway — IBM DataPower Gateway. Operating within API Connect, it performs several critical functions:

Overload protection: The gateway regulates the rate of requests (Rate Limiting). If a partner service or external application begins sending too many requests, IBM DataPower Gateway automatically limits it, preventing internal servers from “crashing.”

Access control: It instantly verifies the digital credentials (certificates, tokens) of every user or partner before allowing a request to proceed further into the system.

A single development hub: The IBM API Connect platform itself provides developers with convenient tools for quickly creating, documenting, and publishing new APIs, making the entire system transparent and manageable.

Level 3. Elasticity of the Red Hat OpenShift environment. The applications, databases, and business logic themselves run within the company’s deepest, most isolated container. The best modern environment for this is the Red Hat OpenShift container orchestration platform.

It operates on the principle of containerization: each application function resides in a separate, secure “box.” The main advantage of OpenShift is automatic scaling. If thousands of customers visit the site at the same time, the platform will instantly “multiply” the containers with the necessary applications to handle the load. As soon as the rush subsides, the excess digital boxes are shut down, saving the company’s computing resources.

IBM’s API management components are perfectly adapted to a containerized environment and work flawlessly under the Red Hat OpenShift orchestration system, creating a unified, integrated, and resilient ecosystem.

Conclusion

The days when IT infrastructure was static are long gone. Today, businesses need platforms that allow them to deploy and scale applications in a containerized environment, automatically adapting to real-world needs.

The combination of IBM API Connect (with the powerful IBM DataPower Gateway) and Red Hat OpenShift is a globally recognized standard for large enterprises that require transparent management of thousands of APIs, development flexibility, and absolute resilience to peak loads.

Solidity possesses deep practical experience and technical expertise to implement such large-scale projects. We help large enterprises modernize their architecture, set up convenient API management, and launch modern platforms that ensure business stability under any conditions.

Our specialists are ready to conduct a detailed technical audit of your current infrastructure, identify bottlenecks, and recommend how to make it flexible and ready to handle high loads.

To schedule a consultation and discuss the details, please email us at: info@solidity.com.ua.