Support Engineer at Unlimit in Belgrade, Central Serbia, Serbia

About Unlimit Unlimit is a global fintech ecosystem built to eliminate financial borders holding businesses back. The company provides the extensive infrastructure needed to scale globally, integrating payment processing, multi-currency business accounts, BaaS and crypto gateways into a single, intelligent platform. Across 17 offices globally, Unlimit bridges hyper-local expertise with a high-capacity financial network, giving companies the agility to expand across regions with operational confidence and speed. Driving the evolution of payments, Unlimit is transforming its infrastructure from human-operated fintech into AI-native financial infrastructure — where APIs are consumed by machines, integrations are negotiated by agents, and systems evolve continuously through intelligent automation. Our next users are not only humans. They are AI agents acting on behalf of humans and businesses. Unlimit serves more than the needs of businesses today; we are building the nervous system for a borderless global economy. Requirements: Experience in supporting card processing systems at least 1 year or 2 years of any payment processing systems Knowledge of the principles of Card Processing Operations of the authorization and clearing part Hands-on experience with any logging system (Splunk, CloudWatch, DataDog, etc.) Knowledge of the HTTP protocol of the application layer, experience with the API-browsers (Postman, Swagger, etc.) PL/SQL - writing simple CRUD queries Nice to have: Experience with Core Banking System, (experience with Temenos would be your benifit) Experience with KYC/KYB (like SumSub, etc.) Experience with SmartVista Any experience with Banking as a Service products Hands-on with SalesForce Responsibilities: Communication with client's support representatives in Slack chats Escalation of tickets to Engineers of the Card Processing Team Online monitoring of the in-house card-processing system Analysis of system events - system logs, etc. Reception and processing of reverse tasks from internal teams Performing and automation of routine procedures (including AI automation tools): file exchange, running of system scheduled tasks Setting up emulators of payment systems (setting up test/pre-prod environments) About Unlimit Unlimit is a global fintech ecosystem built to eliminate financial borders holding businesses back. The company provides the extensive infrastructure needed to scale globally, integrating payment processing, multi-currency business accounts, BaaS and crypto gateways into a single, intelligent platform. Across 17 offices globally, Unlimit bridges hyper-local expertise with a high-capacity financial network, giving companies the agility to expand across regions with operational confidence and speed. Driving the evolution of payments, Unlimit is transforming its infrastructure from human-operated fintech into AI-native financial infrastructure — where APIs are consumed by machines, integrations are negotiated by agents, and systems evolve continuously through intelligent automation. Our next users are not only humans. They are AI agents acting on behalf of humans and businesses. Unlimit serves more than the needs of businesses today; we are building the nervous system for a borderless global economy. Requirements: Experience in supporting card processing systems at least 1 year or 2 years of any payment processing systems Knowledge of the principles of Card Processing Operations of the authorization and clearing part Hands-on experience with any logging system (Splunk, CloudWatch, DataDog, etc.) Knowledge of the HTTP protocol of the application layer, experience with the API-browsers (Postman, Swagger, etc.) PL/SQL - writing simple CRUD queries Nice to have: Experience with Core Banking System, (experience with Temenos would be your benifit) Experience with KYC/KYB (like SumSub, etc.) Experience with SmartVista Any experience with Banking as a Service products Hands-on with SalesForce Responsibilities: Communication with client's support representatives in Slack chats Escalation of tickets to Engineers of the Card Processing Team Online monitoring of the in-house card-processing system Analysis of system events - system logs, etc. Reception and processing of reverse tasks from internal teams Performing and automation of routine procedures (including AI automation tools): file exchange, running of system scheduled tasks Setting up emulators of payment systems (setting up test/pre-prod environments)