About 1Money

1Money is a fast-growing global fintech building the world's first full-stack stablecoin payments infrastructure. Our mission is to enable frictionless, ultra-low-cost global money movement — built to the standards expected of financial infrastructure: correctness, security, compliance, reliability, and operational discipline.

• Backed by top-tier global investors including Fidelity (F-Prime), Galaxy Ventures, Portage, Hack VC, and Tribe Capital.
• Our team brings experience from world-leading organizations such as Binance, Ripple, Circle, Uber, Goldman Sachs, Ant Financial, and OKX.

What we build:

• 1Money Network:a Layer-1 purpose-built for stablecoin payments — designed to be the cheapest, fastest, and most compliant.
• 1Money.com:a fully licensed stablecoin orchestration platform offering on/off ramps, exchange, transfer, and custody.
• 1Money Issuance Platform:end-to-end infrastructure for businesses to issue and scale their own stablecoins.

Role Overview

We are hiring a US-based senior/staff engineer to own theledger — the financial core of 1Money. The ledger is the source of truth for every balance and money movement on our platform, and it is the foundation on which we are building toward abank charter and direct banking operations. You will design and operate a double-entry ledger and the controls, reconciliation, and audit infrastructure around it to a banking-grade standard.

You will work on the systems that define how money is recorded, moved, reconciled, audited, and controlled — ledger architecture, balances, transaction registry, settlement records, reconciliation workflows, audit trails, accounting-facing data, and operational controls across fiat and stablecoin movement. You will partner directly with finance, compliance, risk, and legal to build the systems and evidence required for a bank-license application and regulatory examinations, and to evolve us from a partner-bank (BaaS) model toward chartered banking infrastructure.

This is a hands-on, high-trust role for an engineer who understands that financial infrastructure isnot just backend engineering: it demands correctness, traceability, operational discipline, and clear controls. You treatcorrectness as non-negotiableand reason deeply about financial state, idempotency, consistency, and auditability.

This role requires authorization to work in the United States.

Key Responsibilities

Ledger, Balances & Transaction Registry

• Own the double-entry general ledger: chart of accounts, journals, immutable append-only postings, and derived balances across fiat, stablecoin, customer, platform, and settlement accounts.
• Own transaction registry patterns for deposits, withdrawals, transfers, conversions, settlement, fees, holds, reversals, adjustments, and operational events.
• Define clear source-of-truth boundaries for balances, transaction status, and settlement status.
• Guarantee correctness end-to-end: atomic, exactly-once / idempotent postings; no lost or double-counted funds; consistent balances under retries, async workflows, delayed vendor updates, partial failures, and reconciliation corrections.
• Build trial balance, period-close, and balance-integrity checks that continuously prove the books are in balance.

Reconciliation, Settlement & Controls

• Build reconciliation across internal ledger records, bank/PSP statements, on-chain stablecoin movement, vendor reports, and operational systems.
• Implement exception detection, investigation tooling, correction workflows, and reconciliation dashboards, with automated break detection and resolution.
• Implement bank-grade controls: complete audit trails, segregation of duties, maker-checker approvals, reason codes, immutable records, and operational review queues.
• Improve reliability through idempotency, duplicate detection, retry handling, event replay, observability, alerting, and incident response.
• Work closely with treasury, trading, fiat connectivity, crypto connectivity, and operations to keep financial state consistent and explainable.

Banking Infrastructure & Regulatory Readiness

• Build the technical foundations for bank-license readiness: audit trails, access and operational controls, reconciliation evidence, reporting data, and traceable state transitions.
• Partner with finance, compliance, legal, and risk to translate regulatory and banking requirements (e.g. OCC / state banking departments / FDIC / FinCEN-BSA/AML expectations) into robust technical systems.
• Build the data foundations for regulatory, capital, and liquidity reporting, and support internal and external audits through clear data lineage and reproducible reports.
• Help drive the transition from a partner-bank (BaaS) model toward direct/chartered banking infrastructure.

Architecture & Technical Leadership

• Lead and review Tech Designs for ledger and banking infrastructure changes before implementation, especially cross-domain or high-risk work.
• Make pragmatic architecture decisions across modular-monolith boundaries, service extraction, data ownership, operational cost, and regulatory needs.
• Build high-quality backend systems in Rust with a strong focus on safety, maintainability, and correctness.
• Help establish engineering standards for financial correctness, auditability, observability, and production readiness.

AI-Assisted Engineering

• Use AI development tools (e.g. Claude, ChatGPT, Cursor, Copilot) to improve development speed and code-review quality.
• Apply AI tools responsibly within the security, data-handling, and compliance constraints of a regulated financial institution — without outsourcing engineering judgment.

What We Are Looking For

Required

• 7+ years of professional backend, platform, or financial-systems engineering, with demonstrated ownership of high-correctness production systems.
• Direct experience buildingledgers, balances, accounting, settlement, or core banking / payments systemswhere data integrity, auditability, and operational controls are central requirements.
• Experience working with cross-functional partners such as compliance, finance, risk, legal, operations, auditors, or banking partners.
• Clear written communication and an ownership mindset — able to take an ambiguous, high-stakes problem from design through production support.
• Authorization to work in the United States.

Technical Depth

• Ruststrongly preferred. Strong engineers in another systems/backend language (Go, Java, C++) without deep Rust experience are welcome, provided they can become productive in Rust quickly — our core platform is Rust.
• Strong fundamentals in data modeling, transaction processing, distributed systems, concurrency, and failure handling.
• Deep SQL and financial-data-model experience; comfort reasoning about transactions, isolation, constraints, idempotency, and audit trails.
• Experience with event-driven systems, queues, messaging, async jobs, retries, dead-letter handling, and replayable workflows.
• Strong instincts for observability, structured logging, distributed tracing, metrics, alerting, incident response, and runbooks.
• Comfort with cloud infrastructure, CI/CD, containers, and production operations.

Strongly Preferred

• Prior experience building ledger, wallet, balance, reconciliation, treasury, settlement, payment, accounting, or core banking systems.
• Experience supporting banking-license, money-transmission, broker-dealer, trust, custody, or similarly regulated financial operations.
• Experience with bank integrations, payment processors, card networks, ACH/wire/SWIFT/local rails, stablecoins, custody, or digital-asset infrastructure.
• Familiarity with regulatory expectations around auditability, controls, data retention, reporting, operational risk, and financial reconciliation.
• Production Rust, especially async Rust, Axum, SeaORM/sqlx, Tokio, or similar backend stacks.

Education & Background

• Bachelor's degree or higher in Computer Science, Software Engineering, Mathematics, Electrical Engineering, or a related technical field — or equivalent practical experience.
• Strong engineering fundamentals and demonstrated judgment matter more than school brand. Experience at high-performance engineering organizations in fintech, payments, banking, or core infrastructure is highly relevant.

What Success Looks Like

First 3 months:understand the current 1Money money-movement architecture, identify the most important ledger and reconciliation gaps, ship scoped backend improvements, and contribute to technical design for ledger/banking infrastructure.

First 6 months:own a meaningful ledger, transaction-registry, reconciliation, or controls subsystem end-to-end — data model, API/service boundaries, operational workflows, observability, documentation, and production support.

Over time:become the key US-based owner for ledger and banking infrastructure, helping prepare 1Money for deeper regulated banking operations and bank-license readiness.

How We Work

• We build financial infrastructure where correctness and auditability are non-negotiable.
• We prefer clear technical design, strong ownership, and pragmatic implementation over architecture theater.
• We use AI tools to move faster, but we do not outsource engineering judgment.
• We work across regions and time zones — written communication, documentation, review discipline, and operational clarity matter.
• We expect senior engineers to care about production behavior, controls, and business impact, not only code delivery.

Our Tech Stack

Async Rust (Axum, SeaORM, Tokio) · MySQL · Redis · event-driven services (Kafka / SQS) · AWS · Docker · observability and incident tooling. You will work in a Rust-first backend codebase serving regulated, money-movement workloads.

Location & Reporting

• Location:United States (Remote); New York or San Francisco preferred where possible. US work authorization required.
• Reports to:Engineering Leadership.
• Collaboration:close partnership with finance, compliance, risk, legal, and operations, and overlap with our Asia/UAE, Brazil, and India engineering teams for global coverage.

How to Apply

Does this role sound like a good fit?

• Fill out the form below.
• For "Role Interest," select Staff Backend Engineer - Ledger & Banking Core.
• We'll be in touch!

Apply

We are committed to building a diverse and inclusive workplace. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status.