Senior FinTech Software Engineer — Remote & Payments

Differential Dev Shop, LLC; Cincinnati (OH); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Flexible vacation

Remote work

Job summary

Differential Dev Shop, LLC is seeking an experienced Lead Engineer (FinTech) to join our Cincinnati-based engineering team as a senior hands-on contributor. You will own complex payments systems, define architecture, and mentor others while delivering reliable, scalable software for financial integrations.

You will work across payments, APIs, data, and distributed systems, partnering with Product and Engineering leaders to align technical solutions with business goals.

Qualifications

• 7+ years of professional software engineering experience.
• Strong experience building and scaling production payments software.
• Deep understanding of backend architecture, APIs, databases, and distributed systems.
• Experience working in FinTech, payments, banking, financial services, or other transaction-heavy systems.
• Strong understanding of payment flows, transaction processing, webhooks, reconciliation, or financial integrations.
• Experience integrating with third-party APIs and services such as payment processors, banks, or financial platforms.
• Strong experience with TypeScript/Node.js, GraphQL, PostgreSQL, and modern cloud infrastructure.
• Comfortable working across the stack when needed, including React/React Native.
• Strong architectural instincts and ability to make pragmatic technical tradeoffs.
• Excellent debugging and problem-solving skills.
• Comfortable operating with a high degree of ownership and autonomy.

Responsibilities

• Own the technical design and implementation of complex FinTech and payment-related systems.
• Make architectural decisions and help establish engineering standards and patterns.
• Build and maintain APIs, integrations, services, and data systems.
• Work hands-on in the codebase — designing, coding, reviewing, debugging, and shipping.
• Solve challenging problems involving payments, financial data, transactions, reconciliation, and third-party integrations.
• Partner closely with Product and Engineering leadership to translate business requirements into strong technical solutions.
• Identify technical risks and proactively improve system reliability, scalability, security, and performance.
• Mentor and influence other engineers through code reviews, technical guidance, and strong engineering practices.
• Help the team move quickly without sacrificing quality or long-term maintainability.
• Passion for the whole product process: we know you will have your specific areas of focus, but we find that people who are passionate about the bigger picture collaborate best on our cross-functional teams.
• Demonstrated ability to rely on an iterative process to maintain momentum on projects: our work is never going to be perfect, and we expect you to be able to prioritize what matters most in order to consistently and efficiently iterate and continuously deliver valuable working software.
• Know how to leverage AI tools to massively accelerate deliverables while observing and enforcing sound engineering principles.

Skills

Senior software engineering

FinTech payments

Backend architecture

APIs and distributed systems

TypeScript/Node.js

GraphQL

PostgreSQL

Cloud infrastructure

React/React Native

Tools

TypeScript/Node.js

GraphQL

PostgreSQL

Cloud infrastructure

React

Job description

Differential Dev Shop, LLC is seeking an experienced Lead Engineer (FinTech) to join our Cincinnati-based engineering team as a senior hands-on contributor. You will own complex payments systems, define architecture, and mentor others while delivering reliable, scalable software for financial integrations.

You will work across payments, APIs, data, and distributed systems, partnering with Product and Engineering leaders to align technical solutions with business goals.