Senior Software Engineer

Senior Software Engineer Flagship - 3.5 Coppell, TX Job Details Full-time 1 day ago Qualifications JavaScript frameworks Solution architecture design Distributed systems Implementing APIs Developing and maintaining backend systems Cloud Architecture Design (Architecture design skills) Distributed computing Full Job Description Senior Software Engineer, Fintech - Auto Finance Platform We're a growth-stage fintech rebuilding the auto lending stack on a clean, modern codebase. Small team, large surface area, production deploys every week, and real architectural ownership from day one. Key Responsibilities As a Senior Software Engineer, you will be a core contributor to our flagship auto finance platform.

Your responsibilities will include:

Design and Development:

Architect, build, and operate the backend services and APIs that power loan origination, decisioning, and servicing.

API Integration:

Lead integrations with credit bureaus, fraud providers, payment processors, and dealer systems, including contract design, retry/idempotency strategy and operational runbooks.

Feature Ownership:

Own features end-to-end, partnering directly with Product and Design from problem framing through production rollout.

Code Quality:

Set the patterns for testing, observability, security, and CI/CD that the rest of the team adopts.

Mentorship:

Run design reviews, give technical guidance, and help interview and onboard the engineers who join after you. Playing a core role in establishing and scaling a high-performance engineering team and culture.

Minimum Qualifications US Citizenship:

Applicants must be authorized to work in the U.S.

Experience:

Minimum of 5+ years of professional experience in software engineering.

Domain-Adjacent Experience:

A track record of building and operating mission-critical integrations with external partners in a regulated industry (finance, payments, insurance, healthcare, or similar).

Technical Depth:

Expert level in TypeScript/Node.js or C#/.NET, with production experience in a structured backend framework and a modern React framework. Comfortable picking up the second stack.

Cloud & Architecture:

Hands-on experience with a major cloud provider (AWS preferred), RESTful API design, and distributed systems.

Education:

Bachelor's degree in Computer Science, Engineering, or a related technical field, or equivalent practical experience. Preferred Qualifications Experience working in a Turborepo or Nx monorepo environment with Yarn Workspaces. Prior experience working in a start-up environment. Active contributor to open-source projects or communities. Familiarity with data encryption, field-level security, and syncing data to external systems (e.g., MSSQL-based operational data stores). Experience with AWS Cognito, SAML/SSO authentication, or similar identity platforms. Experience with PostgreSQL and modern database tooling such as Prisma ORM or similar type-safe query builders. Auto finance, lending, or other regulated-industry domain experience. Comfortable working across multiple language ecosystems (TypeScript and .NET). Multi-tenant PostgreSQL with row-level security, IAM auth, or similar isolation patterns. Serverless on AWS (Lambda + API Gateway) and Terraform-managed infrastructure.

Location & Work Schedule Location:

This role offers a hybrid work schedule and is preferred for candidates based in or willing to commute to our offices in Tempe, AZ , or Coppell, TX.

Schedule:

Hybrid Why Join Us? We are a rapidly growing fintech where your contributions have a direct, visible impact on the business. You will work with a clean tech stack and be part of the core group building a high-performance engineering team, empowered to make key architectural decisions and build systems from the ground up. This is an opportunity to redefine an industry and accelerate your career.