Senior Backend Engineer, Payments and Ledger

Spain | Remote | Senior Engineering OpportunityMaxIT Consulting – Max Corporate Group is looking for a Senior Backend Engineer, Payments and Ledger to join a fast-growing New York fintech company building banking, payments, and settlement infrastructure for US prediction markets and regulated gaming.

The company operates financial infrastructure that has already processed more than USD 2 billion, supporting accounts, card products, payment rails, and real-time settlement. The engineering organization is scaling rapidly and is looking for senior individual contributors with substantial financial-services experience.

About the Role

This is a senior backend engineering position focused on systems that move, reconcile, and maintain money in production.

You will work on financial infrastructure where correctness, reliability, data integrity, and real-time processing are fundamental. The ideal candidate has already built and operated systems inside a payments company, bank, neobank, brokerage, trading platform, or comparable financial product organization.

The specific technology stack is not the primary selection criterion. Deep financial-services experience, distributed-systems knowledge, and ownership of production systems are more important than expertise in one particular programming language.

Key Responsibilities

• Design, build, and operate backend systems supporting accounts, payments, balances, cards, and settlement flows.
• Develop highly reliable services for systems that move money in production.
• Build and maintain distributed and event-driven architectures.
• Design robust ledger-style data models and transaction workflows.
• Work extensively with SQL, relational databases, reconciliation, and consistency requirements.
• Own backend services from technical design through deployment, monitoring, and production operation.
• Investigate complex production issues involving financial state, event processing, and transaction integrity.
• Collaborate with product and engineering teams in a small, distributed environment.
• Contribute to architecture decisions as the financial platform and engineering organization continue to scale.

Required Qualifications

• 6+ years of professional backend engineering experience.
• Production ownership of systems that directly move or manage money.
• Professional experience as an employee of a payments, banking, brokerage, trading, neobank, or closely related financial product company.
• Hands-on experience with distributed and/or event-driven systems in production.
• Strong SQL skills.
• Experience designing ledger-style, transactional, or financial data models.