Full Stack Engineer (Senior) ID55910

AgileEngine • Downey, CA

15h • Hybrid

About The Position

We are looking for a Senior Full Stack Engineer to own the build-out of AI usage dashboards, billing logic, and financial insights across a founder-led product. You’ll work across Python, Node.js, React, and PostgreSQL — integrating Azure billing data, designing APIs, and shipping data-heavy UI in a low-process, high-ownership environment. This role is a strong fit for engineers who are comfortable with incomplete requirements and want direct influence over product and architecture.

Requirements

• 6+ years of experience in full-stack development
• Strong experience with Python and Node.js in production environments
• Experience designing and working with PostgreSQL schemas and data models
• Experience building frontend applications with React or similar frameworks
• Experience with AWS services in production
• Experience using AI tools such as Claude, GPT, or similar in development workflows
• Experience integrating third-party APIs, especially billing or usage-based systems
• Ability to work with incomplete requirements and build solutions
• Comfortable in early-stage product environments
• Professional working proficiency in English
• Experience integrating frontend tests into CI/CD pipelines
• Familiarity with observability and usage tracking concepts
• Upper-intermediate English level

Nice To Haves

• Experience integrating Azure billing systems or similar APIs
• Experience building or consuming SDKs
• Experience with PHP
• Experience building financial, billing, or cost-allocation systems
• Familiarity with AI usage metrics, token-based billing, or ROI tracking models
• Experience with dashboards, tables, filters, and data-dense UI patterns
• Prior startup or founder-led product experience
• Exposure to AI tooling workflows

Responsibilities

• Own the implementation and integration of existing product components, including AI usage dashboards and advisor insights
• Design and build backend functionality to support billing rules, chargeback logic, and ROI calculation
• Integrate external billing data sources, including Microsoft Azure billing systems
• Build and evolve APIs and data pipelines that translate raw billing data into financial insights
• Implement frontend functionality for metrics, dashboards, and data-heavy UI views
• Make architectural decisions focused on maintainability and speed
• Collaborate with founders and product stakeholders in a low-process environment
• Ensure smooth deployment and delivery workflows using Vercel
• Improve AI-driven development workflows using tools like Claude or similar LLMs
• Design systems with strong guarantees around data integrity, auditability, and financial accuracy
• Identify technical gaps, risks, and architectural improvements and drive solutions proactively

Benefits

• Professional growth: Mentorship, TechTalks, and personalized growth roadmaps.
• Competitive compensation: USD-based pay with education, fitness, and team activity budgets.
• Exciting projects: Modern solutions with Fortune 500 and top product companies.
• Flextime: Flexible schedule with remote and office options.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed
• Number of Employees: 251-500 employees