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Specialisms - Software Engineering - Fintech
Fintech is software that moves money without losing it. Re:Sourced recruits the backend engineers who have built payments rails, ledgers and core banking under regulatory load, where correctness, idempotency and auditability are the job, not the polish.
The profile
The work clusters around money-movement correctness: payments and transfer rails, double-entry ledgers, real-time transaction processing, reconciliation, and the idempotency that stops a retry from charging a customer twice. Add regulatory reporting, KYC and AML integration, and the uptime people expect of a system they trust with their money.
The differentiator is not raw throughput, it is correctness under failure. Engineers who have run ledgers or payment systems in production understand exactly-once semantics, audit trails and reconciliation in a way general backend engineers usually have not. Typical stack: Go, Java or Kotlin, Kafka, Postgres and event-sourced architectures.
Where they come from
The deepest backend pools sit inside the payments and lending scale-ups (Airwallex, Zeller, Block, Athena, Constantinople, Up) and the core engineering teams at the big four. The reliable pattern: engineers leaving bank or neobank platform teams for scale-ups, bringing money-movement discipline and wanting faster release cycles.
Senior backend engineers with fintech experience in Sydney price at AUD 160-190k base, base only, 25th-75th percentile of accepted offers. Payments and ledger specialists sit at the top of that band. See the full bands in the Salary Guide 2026.
Common questions
They build payments rails, ledgers and core banking under regulatory load, where correctness, idempotency and auditability are the job, not the polish.
Senior fintech software engineers in Sydney run AUD 160-190k base, base only, 25th to 75th percentile of accepted offers.
Discipline around correctness and idempotency, moving money without losing it, plus the auditability regulated environments demand. Provable correctness matters more than polish.
Start a hiring campaign
30 minute working session. No fee until placement. Replacement inside 90 days.