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I’m a FinTech backend engineer focused on embedded banking and payments, with 10+ years of experience building reliable banking API integrations and payment workflows. I work with systems that need to be traceable and consistent—covering webhook processing, idempotency, transaction-state tracking, ledger synchronization, and reconciliation across internal and external systems. I enjoy designing recoverable, failure-tolerant backend services using Go, Python, PostgreSQL, and Apache Kafka, especially where asynchronous processing and event-driven architectures are critical. From building ETL pipelines for authorized business/merchant data to hardening sandbox and integration behavior under concurrency and network failures, I aim to turn complex financial flows into dependable, auditable software.…I’m a FinTech backend engineer focused on embedded banking and payments, with 10+ years of experience building reliable banking API integrations and payment workflows. I work with systems that need to be traceable and consistent—covering webhook processing, idempotency, transaction-state tracking, ledger synchronization, and reconciliation across internal and external systems. I enjoy designing recoverable, failure-tolerant backend services using Go, Python, PostgreSQL, and Apache Kafka, especially where asynchronous processing and event-driven architectures are critical. From building ETL pipelines for authorized business/merchant data to hardening sandbox and integration behavior under concurrency and network failures, I aim to turn complex financial flows into dependable, auditable software.

TOMAS STANKEVICIUS

Back-End Developer, Software Engineer, Data Engineer, +2

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I’m a FinTech backend engineer focused on embedded banking and payments, with 10+ years of experience building reliable banking API integrations and payment workflows. I work with systems that need to be traceable and consistent—covering webhook processing, idempotency, transaction-state tracking, ledger synchronization, and reconciliation across internal and external systems. I enjoy designing recoverable, failure-tolerant backend services using Go, Python, PostgreSQL, and Apache Kafka, especially where asynchronous processing and event-driven architectures are critical. From building ETL pipelines for authorized business/merchant data to hardening sandbox and integration behavior under concurrency and network failures, I aim to turn complex financial flows into dependable, auditable software.…I’m a FinTech backend engineer focused on embedded banking and payments, with 10+ years of experience building reliable banking API integrations and payment workflows. I work with systems that need to be traceable and consistent—covering webhook processing, idempotency, transaction-state tracking, ledger synchronization, and reconciliation across internal and external systems. I enjoy designing recoverable, failure-tolerant backend services using Go, Python, PostgreSQL, and Apache Kafka, especially where asynchronous processing and event-driven architectures are critical. From building ETL pipelines for authorized business/merchant data to hardening sandbox and integration behavior under concurrency and network failures, I aim to turn complex financial flows into dependable, auditable software.

Available to hire

I’m a FinTech backend engineer focused on embedded banking and payments, with 10+ years of experience building reliable banking API integrations and payment workflows. I work with systems that need to be traceable and consistent—covering webhook processing, idempotency, transaction-state tracking, ledger synchronization, and reconciliation across internal and external systems.

I enjoy designing recoverable, failure-tolerant backend services using Go, Python, PostgreSQL, and Apache Kafka, especially where asynchronous processing and event-driven architectures are critical. From building ETL pipelines for authorized business/merchant data to hardening sandbox and integration behavior under concurrency and network failures, I aim to turn complex financial flows into dependable, auditable software.

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Work Experience

FinTech Backend Engineer | Embedded Banking | Payments | Core Banking at SME

September 1, 2025 - Present

Develop Python ETL for authorized business and merchant data used in financial-data integration workflows. Integrate commerce, payment, and ERP sources, validate and transform records into API-ready payloads. Implement data-quality checks, exception handling, and traceability for business-finance and credit-assessment workflows to ensure dependable, auditable data movement into downstream financial services.

Backend Engineer at Mano

December 1, 2023 - September 30, 2025

Build webhook-driven transaction-processing workflows and asynchronous event handling for banking integrations. Implement duplicate-event detection, idempotency, retry logic, and recovery paths for interrupted or repeated event deliveries. Support reconciliation between internal financial records and external transaction updates, including testing concurrency and failure scenarios to keep transaction-state consistent.

FinTech Backend Developer at European Merchant Bank

October 1, 2019 - November 30, 2023

Develop middleware mapping application payloads to banking API formats for payment and banking-integration workflows. Work on SEPA/SWIFT-related payment integrations with transaction-state tracking and reconciliation support. Apply authentication, idempotency, and secure communication patterns where applicable, and participate in integration testing for dependable payment execution flows.

FinTech Backend Developer at SME

June 1, 2016 - September 30, 2019

Build Python ETL processes for authorized business and merchant data from commerce, payment, and ERP sources. Validate and transform financial records with data-quality checks and exception handling to improve traceability. Prepare structured data for API integrations and business-finance/credit-assessment workflows, focusing on accuracy and reliable data readiness.