Senior Backend Engineer, Payments — Remote & High-Impact

Spd-Technology; United States; Remote; USD 140,000 - 210,000; Full time

Job summary

SPD Technology is seeking a Senior Backend Engineer to join our payments platform. You will own critical backend flows for merchant payments, payouts, and settlement, building resilient integrations with processors and banks.

You'll work remotely with a US-based team, contributing to architecture decisions, implementing secure data practices, and delivering scalable, high-availability services in Go, TypeScript, and Node.js.

Qualifications

• 6+ years of professional software engineering experience.
• At least 3 years of hands-on experience with payment systems or processing.
• Strong backend experience with Go, TypeScript, and Node.js.
• Experience owning production payment flows end-to-end.
• Experience integrating payment processors, gateways, or acquirers such as Stripe, Adyen, Braintree, Checkout.com, Worldpay, Fiserv.
• Understanding of PCI DSS and secure data handling.
• Strong English communication and ability to work with a US-based team.

Responsibilities

• Own end-to-end payment flows in TS/ NestJS: authorization, capture, void, refund, disputes, payouts.
• Build and maintain acquirer and processor integrations.
• Design hosted checkout experiences that keep cardholder data out of internal systems.
• Implement fee calculation and rate logic, including tiers and interchange-plus.
• Build reconciliation and settlement layer to match processor reports.
• Design event handling with idempotency, retries, and state machines.
• Integrate fraud and KYC providers and manage ACH mechanics and retries.
• Maintain audit trails and reconciliation evidence.
• Advise product on rail capabilities and review payment-adjacent code.

Skills

Go

TypeScript

Node.js

Payments

English communication

Tools

Stripe

Adyen

Braintree

Checkout.com

Worldpay

Fiserv

Job description

SPD Technology is seeking a Senior Backend Engineer to join our payments platform. You will own critical backend flows for merchant payments, payouts, and settlement, building resilient integrations with processors and banks.

You'll work remotely with a US-based team, contributing to architecture decisions, implementing secure data practices, and delivering scalable, high-availability services in Go, TypeScript, and Node.js.