Senior Backend Engineer (Stripe & Fintech Specialist)

About Mindtech  Mindtech is your gateway to exciting, impactful technology projects. We specialize in staff augmentation and end-to-end software outsourcing, connecting top Latin American talent with global opportunities. Our agile approach ensures exceptional service and innovative solutions for our clients. Senior Backend Engineer (Stripe & Fintech Specialist) Role Overview We´re seeking a Senior Backend Engineer with deep expertise in Stripe Connect to lead the evolution of our clients payment infrastructure. You will be responsible for architecting and implementing a robust Stripe Connect integration within a core Django API, facilitating a critical migration from a legacy Ruby on Rails payment portal. As the lead for this initiative, you will handle the end-to-end payment lifecycle—from onboarding and funds flow to complex webhook orchestration and business logic—ensuring a seamless experience for our marketplace users. Core Responsibilities Stripe Connect Implementation: Architect and build the Stripe Connect integration (Standard, Express, or Custom) within a Django/Python environment. Payment Orchestration: Design and implement complex payment flows, including split payments, payouts, and fee collection. Webhook Architecture: Build a resilient, idempotent webhook processing system to legacy Ruby on Rails Payment Portal into the core Django API. Businesses handle real-time events from Stripe. Legacy Migration: Collaborate with the team to migrate payment logic and data from a Logic Integration: Integrate Stripe events with core business processes (auctions, bidding, and user management). Asynchronous Processing: Utilize Celery and Redis to manage high-volume, time-sensitive payment tasks and background jobs. Security & Compliance: Ensure all payment workflows adhere to PCI-DSS standards and best practices for financial data security. Monitoring & Observability: Build and maintain monitoring, alerting, and logging infrastructure for payment flows (Datadog, Sentry or similar). Exhaustive Testing: Write comprehensive unit and integration tests, maintain high test coverage. Technical Stack Backend: Python 3.11+, Django 4.x, Django REST Framework (DRF) Payments: Stripe (Connect, Billing, Webhooks) Task Queue: Celery, Redis, RabbitMQ (Amazon MQ) Database: PostgreSQL (Aurora Serverless v2) Infrastructure: AWS (ECS Fargate, ElastiCache) Required Qualifications 5+ years of professional backend development experience. Proven track record of implementing Stripe Connect at scale (experience with marketplace or platform models is essential). Expert-level Python & Django skills, specifically building scalable APIs and handling complex database migrations. Advanced Webhook Management: Experience building robust systems for handling, retrying, and auditing webhooks. Asynchronous Expertise: Deep experience with Celery and Redis for handling long-running or mission-critical tasks. Architectural Mindset: Ability to design systems that are modular, testable, and maintainable. Preferred Qualifications Ruby on Rails Knowledge: Ability to read and understand legacy Ruby code to facilitate a smoother migration to Django. Fintech Experience: Prior experience in auctions, e-commerce, or similar high-stakes financial environments. AWS Proficiency: Hands-on experience with ECS Fargate and Amazon MQ. Frontend Awareness: Understanding of how backend payment flows interact with React Native (Expo) and Next.js frontends. State Machine / Workflow experience: Ability to design payment state machines or workflows We Offer 100% remote work Salary in USD Referral program Growth opportunities in a fast-scaling startup A global, multicultural work environment