Staff Software Engineer (Infrastructure)

• Practice Development & Integration

• Technologies Development Skills

• Location New York, United States

• Type Permanent

Lead Software Engineer - Infrastructure

Our partner client, an early stage startup, is seeking a skilled and experienced Senior/Staff Software Engineer who is both an active contributor and a proven technical leader. In this role, you’ll be responsible for writing production-quality code, designing scalable and robust backend systems, and collaborating with stakeholders to build next-generation payment solutions. You’ll drive the technical architecture and delivery of key initiatives, setting a high bar for execution and enabling the team to create impactful products quickly and efficiently.

Key Responsibilities

• Collaborate with founders, engineers, and operations teams to make critical technical decisions that enhance the performance, security, and scalability of core products.
• Shape the direction of backend systems by partnering with leadership and advocating for best-in-class architectural practices.
• Take full ownership of the infrastructure stack, balancing short-term execution with long-term scalability and sustainability.
• Define and implement standards for engineering excellence, fostering a culture of automated testing and continuous improvement to ensure high-quality experiences for customers.
• Build new backend services and maintain existing systems with a focus on performance, reliability, and scalability.
• Mentor and provide technical guidance to other engineers, sharing best practices in architecture, testing, and development.

Your Experience

• 8+ years of experience in software engineering, with a focus on backend development and cloud infrastructure.
• At least 3 years of experience in a senior technical role.
• 3+ years of experience building APIs and architecting backend systems at scale.
• Demonstrated ability to manage large-scale backend infrastructure and cloud infrastructure (AWS, Terraform, messaging queues, etc), as well as CI/CD processes.
• Experience managing and organizing multiple projects simultaneously.
• Proven experience in technical leadership, driving software projects involving multiple engineers.
• Expertise in JavaScript/TypeScript and Node.js and/or Ruby on Rails.
• Strong experience with REST APIs; familiarity with GraphQL and WebSocket is a plus.
• Advanced knowledge of Postgres or other relational databases.
• Familiarity with modern testing frameworks and API testing practices.
• Solid understanding of security best practices for financial applications.
• Strong organizational skills and an ability to prioritize effectively.
• Excellent written and verbal communication skills, with experience collaborating in a remote-first environment (Slack, Notion, Linear).

Bonus Points For:

• Familiarity with authentication and authorization technologies (OAuth, JWT, SAML, SSO).
• Understanding of cryptographic protocols for securing data (TLS/SSL, digital signatures, hashing, encryption).
• Experience in monitoring, observability, and running production-scale applications.
• Experience building applications from the ground up.
• Domain knowledge in payment processing, authentication, or finance.
• Background in FinTech, financial services, or working in an early-stage startup.

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