Senior Backend Engineer – Payments, Go, TypeScript, Node.js

SPD Technology

. Join a product team building payment infrastructure for merchants and partner platforms .

Posted 10/3/2026full-timeRemote • Ukraine, Poland, Spain, Portugal, Romania, GeorgiaSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive experience in payment systems and backend engineering, with a strong focus on TypeScript, Go, and Node.js. Capable of designing and implementing secure payment flows, reconciliation processes, and integrations with various payment processors while ensuring compliance with PCI DSS standards.

Highest-signal resume keywords

Payment Systems ExpertiseTypeScript DevelopmentGo ProgrammingPayment ReconciliationPCI DSS Compliance

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

TypeScriptGoNode.jsPayment ProcessingPayment ReconciliationRelational Data ModelingTokenizationWebhooksAsynchronous ProcessingFraud Detection

Soft Skills

Strong Communication SkillsCollaboration

Tools & Technologies

StripeAdyenBraintreeCheckout.comWorldpayFiservAI-Assisted Development Tooling

Industry Keywords

Payment InfrastructureACHNACHACard Payment LifecycleDispute HandlingMulti-Currency PaymentsE-Commerce SDK Development

Tech Stack

Tools & technologies

JavaScriptMagentoNode.jsRuby on RailsTypeScriptGo

About the role

Key responsibilities & impact

Join a product team building payment infrastructure for merchants and partner platforms
Own end-to-end payment flows in TypeScript/NestJS services, including authorization, capture, void, refund, dispute handling, and payout initiation and confirmation
Build and maintain acquirer and processor integrations using clean internal abstractions
Design embedded and hosted checkout experiences, including hosted fields, iframes, and tokenization, to minimize PCI scope
Implement fee calculation and rate logic, including tiers, interchange-plus, flat structures, rounding rules, special rates, and edge cases
Build reconciliation and settlement layers matching processor reports and settlement files against internal records
Design event handling with idempotency keys, out-of-order and duplicate webhooks, retries with backoff, and state machines
Integrate fraud, bank-account verification, and KYC providers and tune decisioning against real outcomes
Handle ACH mechanics, including submission windows, returns, return codes, NOCs, and retry rules
Maintain domain correctness, complete audit trails, and reconciliation evidence
Act as the team's payments expert, advise product on rail capabilities, and review payment-adjacent code
Collaborate daily with a US-based team with 4–6 hours of overlap with US Central Time

Requirements

What you’ll need

6+ years of professional software engineering experience
At least 3 years of hands-on experience with payment systems or payment processing
Strong backend engineering experience with Go, TypeScript, and Node.js
Direct experience owning production payment flows rather than only performing basic payment API integrations
Experience integrating payment processors, gateways, or acquirers such as Stripe, Adyen, Braintree, Checkout.com, Worldpay, Fiserv, or similar providers
Strong understanding of the card payment lifecycle, including authorization, capture, settlement, refunds, chargebacks, and disputes
Understanding of bank payment rails and preferably ACH/NACHA concepts, including returns and transaction timing
Experience with payment reconciliation and settlement
Strong understanding of webhooks, retries, idempotency, asynchronous processing, and distributed-system failure scenarios
Experience designing relational data models for transaction-heavy systems
Understanding of PCI DSS and payment-security patterns such as tokenization and isolation of sensitive payment data
Strong attention to correctness and edge cases, especially in financial systems
Fluency with modern AI-assisted development tooling
Strong English communication skills and confidence working directly with a US-based team
Ability to work with 4–6 hours of daily overlap with US Central Time
Bonus: Experience with platform, marketplace, or facilitator models, including split payments, sub-merchant onboarding, and multi-party flows
Bonus: Experience with payouts and disbursement rails, including bank-account collection, verification, and payout status handling
Bonus: Experience with fraud and risk tooling, and bank-account validation services
Bonus: Experience with e-commerce plugin or SDK development, such as WooCommerce, Shopify, or Magento
Bonus: Knowledge of multi-currency, cross-border, or alternative payment methods
Bonus: Experience with event sourcing applied to financial state and double-entry ledger design

Benefits

Comp & perks

Full-time remote work around the globe, or hybrid work from office hubs
Flexible working schedule
Stable workload and stable income
Performance review and career path
Mentorship program
Personal development plan
Individual learning through the corporate library
Public speaking support
Company-wide tech and cultural events
Supportive, flexible work environment with collaboration, open communication, and mutual respect
Meaningful CSR initiatives