Senior Software Engineer, Back End, Accounting & Treasury (Fully Remote)

Caliza; United States; Remote; USD 140,000 - 190,000; Full time

Job summary

Caliza, a remote startup building commercial banking infrastructure, seeks a back-end engineer to own ledger and treasury systems, enabling cross-border USD accounts, multi-currency payments, and fiat-stablecoin flows.

You will design and maintain ledger and treasury services in Kotlin and Spring Boot, model money movement with double-entry accounting, and build reconciliation with immutable audit trails for finance and compliance.

Qualifications

• 5+ years of back-end development experience with strong Kotlin or Java and relational databases.
• Experience building accounting or money-critical systems, plus distributed systems consistency and idempotency.

Responsibilities

• Design and maintain ledger and treasury services in Kotlin and Spring Boot.
• Model money movement with double-entry accounting, including returns, reversals, fees, and FX.
• Build reconciliation and maintain immutable audit trails for finance and compliance.

Skills

Kotlin/Java backend

Relational databases

Distributed systems

Tools

Spring Boot

Job description

• Build and own the systems behind double-entry ledger, reconciliation, and fiat-stablecoin conversion tracking.
• Ensure every payment is recorded exactly once, correctly, and reconciled against banks and on-chain wallets.

What you'll be doing:

• Design and maintain ledger and treasury services in Kotlin and Spring Boot.
• Model money movement with double-entry accounting, including returns, reversals, fees, and FX.
• Build reconciliation and maintain immutable audit trails for finance and compliance.

What we're looking for:

• 5+ years of back-end development experience with strong Kotlin or Java and relational databases.
• Experience building accounting systems or other money-critical systems, plus distributed systems consistency and idempotency.

How we work:

• Use AI coding tools daily while owning and testing every line you ship.
• Work with high autonomy and async collaboration in a remote startup environment.

Caliza is commercial banking infrastructure enabling cross-border businesses to hold USD accounts, collect and pay in 33+ currencies, and convert between fiat and stablecoins via one platform and API. It is a remote startup backed by notable investors, with a team that has built financial infrastructure at Visa, Nubank, and other fintechs, and values high autonomy and async collaboration.