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Senior Software Engineer, Fullstack

In office • Philadelphia💼 Full-time💰 $160,000–$160,000🗓 2026-06-25

Core

Lead large-scale feature implementation and provide technical guidance to junior engineers across analytics, commerce, product, and operations teams.

Role type

Senior Staff Software Engineer (Fullstack)

Builds

Production web applications and distributed systems for finance, operations, and risk teams

Domain

Fintech / Consumer Finance

Deliverable

production ML models | product features | infrastructure

Required skills

Python/Django, React/Typescript, distributed systems design, AWS, Docker, Kubernetes, technical leadership, system debugging

Preferred skills

Consumer product empathy, mentoring, full lifecycle feature execution

Technologies

Typescript, Javascript, React, Redux, Python, Django, Flask, Kubernetes, AWS, Docker

Responsibilities

Lead implementation of large scale features, develop technical requirements with Product team, solve problems in distributed architectures, improve build/test/delivery processes

Seniority

Senior, hands-on IC with leadership responsibilities

Rewrite
## About the Role We're searching for an experienced and owner-minded Software Engineer to join Perpay and contribute to our culture of technical excellence. You will lead large-scale projects from start-to-finish, working across multiple teams (analytics, commerce, product, design, operations) while providing guidance to junior-level engineers. As we're a growing engineering team, you'll also have the opportunity to make an impact on our tech and our team. Given our people-first approach, your elevated level of contribution will strengthen our culture of inclusion, mentorship, and continuous learning. As a leader of Perpay's engineering team, you'll collaborate with stakeholders ranging from entry-level contributors to senior-level executives. This opportunity is both unique and pivotal, as it offers the chance to provide leadership to a rapidly growing team. Our tech stack: Typescript, Javascript, React, Redux, Python, Django, Flask, Kubernetes, AWS, Docker and more Our greatest strength is our people and we'd love for you to be one of them! We highly value product-mindset, experience building production web apps for real users, and ability to coach and support junior engineers. An ownership mentality is a must, along with empathy and low ego. We're building to win, and are eager to find more team members to help us get there. ## Responsibilities - Be a leader our team looks to as a model of execution, accountability, and technical expertise - Lead the implementation of large scale features for our customers and our internal finance, operations, and risk teams - Develop technical requirements alongside our Product team - Solve problems that span multiple interconnected systems with distributed architectures and scaling systems - Execute on the full lifecycle of new features with fellow engineers - Continue to improve how we build, test, and deliver software ## Requirements - 5+ years of experience building web applications at scale in at least one modern language / framework (Python/Django, React/Typescript, Rails, etc.) - 2+ years of experience leading technical teams and large, complex projects - Experience working on consumer-facing products and demonstrating empathy for end-users - Excellent at unblocking yourself and those around you, and an ability to design, analyze, and debug distributed systems and services. - Significant experience with operating large scale services with AWS, Docker, and/or Kubernetes - Excellent communication skills, including the ability to explain highly technical subject matter to a nontechnical audience ## What We Offer NYC-level total cash-comp (base $160k into the $200's, plus equity and a discretionary cash bonus) We know not everybody checks all the boxes, so if you're interested, please apply because you could be just what we're looking for!
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