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Core Competencies
Role fitCore Competencies
Use this summary to align your resume positioning with the role.
Demonstrates expertise in building and operating high-integrity transactional systems, particularly in payments and double-entry ledgers, while ensuring compliance with financial regulations and maintaining robust reconciliation processes. Proficient in relational databases and SQL, with a strong focus on schema design and operational workflows.
Highest-signal resume keywords
Backend Engineering ExperienceRelational Database SkillsJava or Python ProficiencyEvent-Driven Systems ExperienceReconciliation Expertise
ATS Keywords
Tailor your resumeApplicant Tracking System Keywords
Tip: use these terms in your resume and cover letter to boost ATS matches.
Hard Skills
SQLPostgreSQLMySQLSchema ModellingTransaction IsolationIdempotencyEvent ReplayDouble-Entry LedgerPayment Posting EngineSettlement Platform
Soft Skills
Clear Technical CommunicationCollaboration with Finance and Operations
Tools & Technologies
AWS LambdaEventBridgeSQSKafkaFireblocksTigerBeetleModern TreasuryMambuTemenos
Industry Keywords
Financial SystemsCore BankingDigital AssetsCrypto CustodyCross-Border PaymentsRegulated BankingAudit EvidenceOperational Controls
Tech Stack
Tools & technologiesAWSJavaKafkaMySQLPostgresPythonSQL
About the role
Key responsibilities & impact- Build and improve an event-sourced, append-only double-entry ledger and account, journal, posting, balance, hold, fee, FX, and adjustment models
- Implement posting rules and invariants that keep journals balanced, prevent unauthorised value creation or loss, and provide a clear audit trail
- Build transaction-processing flows for authorisation, holds, capture, settlement, reversals, refunds, chargebacks, expiry, corrections, and controlled manual adjustments
- Apply idempotency, deduplication, sequencing, and concurrency controls to payment, card, custody, and blockchain events
- Build reconciliation controls across the managed CASP ledger, Fireblocks, on-chain data, fiat ramps, card processing, treasury, accounting systems, and GoTyme’s financial-control projection
- Build operational workflows for missing events, duplicate notifications, amount or currency mismatches, unbalanced postings, and suspense or repair processes
- Contribute to event schemas, financial data contracts, versioning, replay, and backfill approaches
- Work with finance and treasury to create accounting evidence, GL exports, reserve and liquidity views, and audit and regulatory materials
- Apply practices for schema design, migrations, indexing, partitioning, data retention, backups, recovery testing, and database performance
- Participate in financial-core technical design and code reviews
- Own monitoring and production support for built components; contribute to reconciliation service levels, incident response, root-cause analysis, and controlled remediation
- Collaborate with finance, treasury, risk, compliance, operations, vendor-integration engineers, and senior financial-core engineers
Requirements
What you’ll need- 5+ years of backend engineering experience, including meaningful hands-on work on payments, ledger, accounting, settlement, core banking, or another high-integrity transactional system
- Experience building, operating, or making substantial contributions to a double-entry ledger, payment posting engine, settlement platform, core-banking subsystem, or equivalent financial system of record
- Strong relational database and SQL skills, ideally PostgreSQL or MySQL
- Understanding of schema modelling, transaction isolation, locking, concurrency, query performance, indexing, migrations, and recovery
- Working understanding of journals, debits and credits, chart of accounts, posting rules, available versus settled balance, holds, reversals, adjustments, fees, FX, and reconciliation
- Practical experience with idempotency, outbox and inbox patterns, event ordering, duplicate delivery, exactly-once-effect design, and failure recovery
- Experience building reconciliations that compare internal and external records, identify breaks, retain evidence, and support controlled repair
- Strong Java or Python experience and a record of building and operating reliable production services
- Experience with event-driven systems, including event replay, schema evolution, auditability, and eventual consistency
- Clear technical communication and ability to work with finance, product, compliance, and operational partners
- Strong plus: experience in stablecoins, digital assets, crypto custody, exchange operations, or on-chain settlement
- Strong plus: experience reconciling custody or ledger records to blockchain transaction events, confirmations, fees, and failed transactions
- Strong plus: experience with Fireblocks, TigerBeetle, Modern Treasury, Mambu, Temenos, or similar infrastructure
- Strong plus: experience in card issuing or processing, payment acquiring, cross-border payments, treasury, FX, or regulated banking
- Strong plus: experience with AWS serverless and event-driven services such as Lambda, EventBridge, SQS, and Step Functions; Kafka is also useful
- Strong plus: experience designing data retention, partitioning, archival, and disaster-recovery approaches for financial records
- Strong plus: experience with accounting exports, general-ledger integration, audit evidence, regulatory evidence, and operational controls
- Strong plus: experience mentoring engineers or owning a defined financial-core component