Everfit Technologies Inc ★ 2.3

Responsibilities

• Design, build, and maintain core payment, subscription, and billing services with high reliability and data consistency.
• Lead backend development for Stripe integrations, including:
• Stripe Subscriptions & Billing
• Stripe Connect (account onboarding, payouts, transfers, balance reconciliation)
• Payment Intents, Checkout, Invoices, and Webhooks
• Build secure and scalable payout flows for coaches and partners across regions.
• Design systems with strong idempotency, retry, and failure-handling strategies for financial transactions.
• Own services from development through production launch, including rollout, monitoring, and post-launch support.
• Monitor live systems using observability tools (e.g., Datadog) to ensure the health of payment flows.
• Handle production incidents, perform root-cause analysis, and drive long-term reliability improvements.
• Collaborate closely with Product, Finance, and other Engineering teams to deliver monetization features.
• Mentor other backend engineers and contribute to architecture and technical standards.

Qualifications

• 5+ years of professional backend engineering experience.
• Good English communication skills.
• Strong experience building financial, payment, or subscription-based systems in production.
• Hands-on experience with Stripe, including:
• Stripe Connect (Standard / Express / Custom accounts)
• Subscriptions, Billing, Webhooks, and Invoices
• Solid understanding of payment lifecycles, reconciliation, and edge cases.
• Familiar with fraud and risk management concepts, including:
• Chargebacks and dispute handling
• Abnormal transaction detection
• Payment verification and protection flows
• Proficient in Node.js (ES6+), RESTful APIs, and microservice architectures.
• Strong experience with PostgreSQL, Redis, and transactional data modeling.
• Hands-on experience with monitoring, logging, and alerting tools such as Datadog.
• Proven ability to debug and operate production systems under real traffic.
• Strong sense of ownership, accountability, and reliability, especially when working with money.
• Comfortable working cross-functionally in an Agile/Scrum environment.

[Nice to have]

• Experience with Stripe Radar or other fraud detection tools.
• Familiarity with PCI-DSS principles and secure payment architecture.
• Experience with multi-currency, cross-border payments, or tax/VAT handling.
• Experience with event-driven architectures (Kafka, SQS).
• Experience building internal financial tooling (reconciliation, reporting, payout dashboards).
• Experience applying AI or automation to monitoring, fraud detection, or operational workflows.