Java backend and full-stack engineers. Authorising a card payment, clearing it and settling it between banks is transaction processing at enormous volume, where every message must arrive once and add up. Java engineers build these engines, at the card networks, the processors, like TNS and Global Payments, the UPI apps, like PhonePe, and the gift and fleet card companies, like Blackhawk Network and WEX. They are the most common opening by far, and well above their usual weight. Most postings require Spring Boot with Oracle or SQL databases, and many roles are full-stack with React or Angular.

Software Engineer, Fintech. Many payments companies hire under a plain software engineer title, without naming a single stack. Most of these roles are standard backend and full-stack work at the card networks, the global and Indian gateways, like Razorpay, PayPal and Adyen, and Blackhawk Network, the gift card company, where payments is the setting rather than the skill, and the postings require Java or Python with Kafka, Kubernetes and Spring Boot. A smaller part is defined by payments itself, such as cross-border flows, card issuing or settlement, at the cross-border payment companies, like Flywire and Wise, the card networks and the custody companies, like BitGo, and these are hired with experience. Together, fintech software engineers are the second largest group here, several times as common as at a typical product company.

Cloud and DevOps engineers. Payment systems run around the clock, and an outage stops shops from taking money. Cloud and DevOps engineers build and run these platforms, at the card networks and the UPI apps. The postings require Python and Java, Go far more often than usual, AWS and Kubernetes, with Terraform and code-quality tools such as SonarQube.

Test engineers. A payment that goes wrong is a serious failure, and every change has to be proved before it reaches money. Testers hold about their usual place, mostly at the card networks. They automate in Java with Playwright, Selenium, JUnit and REST Assured, for testing the services that pass messages between banks, and some test performance with JMeter.

Platform developers. Mastercard hires many developers who build on and connect packaged platforms, such as Oracle Integration Cloud, Salesforce and Workday, alongside Java and SQL. This group is well above its usual weight, and it grew sharply between July and September 2026.

Mobile engineers. The UPI app and the wallet live on the phone, and so do the expense and card apps. Mobile engineers build them, and PhonePe, the largest UPI app, hires the most, in Kotlin, Swift and React Native. They are more common here than at most product companies.

Data engineers. Transactions produce streams of data for fraud checks, reconciliation and reporting. Data engineers build those pipelines in Python with Spark, Kafka and Flink, at the card networks, Stripe, the crypto exchanges, like CoinDCX and Coinbase, and WEX, the fleet card company.

GenAI engineers. GenAI is less common here than at most product companies. Most of the work is at Visa, which builds AI features for its payment products, with Python, Java and LangChain.

.NET engineers. .NET engineers are also less common than usual. They work at WEX, the processors and the companies that pay bills and invoices between businesses, like Billtrust and Bottomline, in C# with React or Angular and SQL Server.

Also present. Backend engineers not tied to one language at the global gateways and the cross-border companies, generalist software engineers, Python engineers at PayPal, Go engineers at the crypto exchanges and WEX, JavaScript and Node engineers at the expense and card start-ups, like Alaan, frontend engineers, a few Software Engineer, Security roles with PCI DSS, and C/C++ engineers at TNS, a payment network-services company.

Rare here. SAP and firmware work barely appear.