About our client
Our client is a stable technology company that develops and operates payment systems with a global reach. They are among the largest payment solution providers worldwide – their services are used daily by millions of businesses across dozens of countries.
The company is listed in the Fortune 500 and has a long-term focus on building its own platforms that enable secure and reliable real-time processing of card transactions.
They are also exploring the use of blockchain technologies and cryptocurrencies within their product portfolio.
The team in Prague is responsible for key systems supporting card payment authorization. We are looking for a new expert to join and help maintain and further develop these critical systems.
Job description
Every card transaction passes through a complex authorization system that verifies and processes it within milliseconds.
Your role will be to understand how this system works end-to-end and contribute to its further development, performance, and resilience.
You will:
• Analyse business and technical requirements and translate them into functional and architectural specifications
• Design system integrations, message flows, and data mappings for authorization services
• Collaborate with development teams on implementation, testing, and release management
• Participate in certifications and integrations with Visa / Mastercard and other card schemes
• Review existing architecture and propose optimizations for performance, stability, and scalability
• Support incident analysis and help resolve complex authorization issues
• Document system behavior and data flows using UML / PlantUML / Markdown
• Work within an environment built for real-time, high-availability authorization
Requirements
• 5+ years of experience as a technical analyst, systems consultant or solution architect in the payments domain
• Deep understanding of card payment authorization and transaction processing (ISO 8583)
• Knowledge of authorization and payment systems such as BASE24 / ACI, PowerZac, Prime, or OpenWay
• Experience from banking, fintech or payment processor environments
• Proven ability to model and design complex systems, create sequence and integration diagrams
• Familiarity with PCI-DSS or card-scheme certification processes
• Strong analytical and communication skills – ability to bridge business, IT, and operations
• Fluent Czech or Slovak – daily communication within the local team
• English – professional level (spoken and written)
Offer & Terms
• Long-term B2B contract with a stable international company
• Flexible hybrid work model
• Collaboration with senior experts in the European payment industry
• Direct impact on the architecture and performance of systems processing millions of daily transactions
More information
This opportunity is open only to candidates based in the Czech Republic with valid EU work authorization and a registered EU freelance/business license (B2B).
No visa sponsorship is available.
The selection process is led by a senior IT recruiter with real technical and domain experience, ensuring a professional and relevant discussion – without generic recruiter talk.
If this sounds like you, we’d love to hear from you!
