Software Engineer — Payments Infrastructure

Codex is building infrastructure for stablecoin-powered cross-border payments, enabling faster, lower-cost, and more transparent money movement compared to traditional financial systems. The company operates at the intersection of crypto, payments, compliance, and global financial infrastructure. This Software Engineer role owns critical payment and compliance workflows spanning customer onboarding, KYC, KYB, transaction monitoring, payment execution, settlement, and reconciliation. Working closely with founders, Trading Operations, Compliance, and Legal teams, the successful candidate will help design and maintain backend systems that support stablecoin settlement, payment rails, AML controls, ledger infrastructure, and regulatory reporting. The position offers significant ownership across payment operations and compliance architecture while contributing to blockchain infrastructure roles supporting real-world financial services.

🔹 Responsibilities

• Own integrations with third-party payment providers, including payout workflows, API integrations, and sandbox or testnet validation.

• Design and implement architectures governing interactions between first-party and third-party payment flows while considering maintainability, coupling, and operational risk.

• Integrate global payment rails, banking systems, payment service providers, and liquidity partners.

• Build document storage capabilities and invoice processing pipelines supporting third-party operational workflows.

• Collaborate with Legal and Compliance teams on technical and regulatory considerations arising from payment integrations.

• Build and maintain settlement, reconciliation, and ledger systems supporting both fiat and crypto transaction flows.

• Develop stablecoin on-ramp and off-ramp functionality alongside supporting crypto compliance infrastructure.

• Lead backend architecture improvements and refactoring initiatives to improve system correctness and maintainability.

• Design and maintain order management functionality including cancellation handling, payout processing, and state validation workflows.

• Build operational tooling that enables non-engineering teams to manage pending payout workflows efficiently.

• Develop onboarding infrastructure covering KYC, KYB, identity verification integrations, and risk scoring systems.

• Own KYT integration layers across fiat and crypto deposit, payment, and order workflows.

• Build transaction monitoring, AML controls, and sanctions screening capabilities.

• Maintain compliance-related data infrastructure including audit logs, reporting pipelines, and regulatory reporting workflows.

• Contribute to KYT implementation strategies across third-party payment flows.

For companies seeking to hire a blockchain developer fast, expertise in payments, compliance systems, and backend infrastructure remains highly valuable.

🔹 Requirements

• 3 to 5 years of backend engineering experience with significant expertise in payments infrastructure, payment rails, compliance systems, or onboarding platforms.

• Strong system design capabilities with experience building resilient, scalable, and maintainable systems.

• Experience collaborating with compliance, legal, or operations stakeholders.

• Ability to translate business requirements or regulatory obligations into clear technical specifications.

• Strong ownership mindset with the ability to execute quickly while maintaining quality standards.

• Familiarity with both payment rails and compliance frameworks is advantageous.

• Experience with crypto infrastructure, stablecoin systems, blockchain analytics tools, or on-chain settlement processes is beneficial.

• Previous startup or scale-up experience with broad ownership responsibilities is preferred.

🔁 AOB Career Note

This opportunity was curated for Home | ArtofBlockchain professionals exploring payments infrastructure, stablecoin systems, compliance engineering, backend development, fintech platforms, and cross-border financial technology careers. Review the original job posting carefully and verify all eligibility, location, and hiring requirements directly with the employer before applying.