Senior Software Engineer- Money Engineering - New York, NY

At CSS, we're building the definitive operating system for restaurants. The Money team is the financial engine at the core of our platform, responsible for ensuring that every dollar is processed, moved, and accounted for with impeccable accuracy and reliability. We build the critical infrastructure that allows restaurants to process payments, get paid and grow their business.

We are looking for a seasoned Senior Software Engineer to help us design and build the next generation of our financial products. You will tackle complex challenges in payments, money movement, fraud prevention, and financial automation.

As a Senior Engineer on the Money team, you will architect, build, and scale the mission-critical systems that handle our financial operations. Your work will be pivotal in building trust with our customers and enabling new product capabilities. You’ll have opportunities to focus on:

• →Engineer and maintain our core payment capabilities, focusing on high availability, security, and scalability. You'll ensure every transaction is fast, secure, and reliable.
• →Develop robust, reliable APIs and services that power money movement to help restaurants manage their cash flow effectively.
• →Build the backend systems for customer-facing products like billing & invoicing.
• →Build and design systems to improve fraud detection and response.

• →Architect and implement highly available, fault-tolerant backend systems and APIs for payment processing, money movement, fraud, and financial reconciliation.
• →Collaborate closely with product managers, business stakeholders and other engineers to design and deliver business goals.
• →Drive technical excellence through rigorous code reviews, automated testing, and clear documentation.
• →Mentor other engineers and lead complex technical projects, contributing to the team's long-term vision and strategy.

We value engineers who are passionate about building resilient, trustworthy financial systems and are excited to solve complex problems in the payments domain.

• Proficiency in backend programming languages like Java or Go.
• Familiarity with relational and/or NoSQL databases (e.g., PostgreSQL, MongoDB, Redis).
• Experience with cloud platforms like AWS, Google Cloud, or Azure.
• Understanding of RESTful APIs, microservices, and distributed systems.
• Strong debugging and problem-solving skills.

• 5+ years of professional software engineering experience, with significant time spent in payments, billing, or financial technology.
• Deep understanding of the payment processing lifecycle, including authorization, capture, settlement, and reconciliation.
• Direct experience with payment gateways (e.g., Stripe, Adyen, PayPal).
• Demonstrated experience in architecting and operating large-scale, fault-tolerant distributed systems that handle financial data.
• Knowledge of fraud detection techniques and experience building or integrating with risk management systems.

Actual compensation will be determined on an individual basis and may vary depending on experience, skills, and qualifications.

Base salary is just one part of your total rewards package. You may also be eligible for equity awards and an annual performance-based bonus.

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