Senior .NET Developer (Fintech)

TL;DR

Senior .NET Developer (Fintech): Building and optimizing greenfield payment platforms across Europe with an accent on real-time and batch payment systems, banking standards, and Open Banking. Focus on implementing ISO 20022 and SWIFT MT/MX payment messages and integrating with bank APIs for a modern, compliant payment system.

Location: Hybrid in Lithuania

Company

hirify.global offers a gateway to exciting career prospects for job seekers, aiming to connect them with fulfilling work environments.

What you will do

• Develop and maintain backend payment processing services using C# / .NET.
• Implement and process ISO 20022 and SWIFT MT/MX payment messages.
• Integrate with bank APIs, real-time payment rails, and file-based channels.
• Support the full payment lifecycle from initiation to clearing, settlement, and reconciliation.
• Ensure security, compliance, error handling, and auditability of payment flows.
• Collaborate with engineering, product, and compliance teams on development and CI/CD.

Requirements

• 6+ years of hands-on experience with C# / .NET (Core / 6 / 7 / 8).
• Strong, practical experience with payment systems and banking integrations.
• Advanced knowledge of ISO 20022, SEPA, and payment messaging standards.
• Hands-on experience with SWIFT, FPS, BACS, CHAPS, TARGET2.
• Proven experience with Open Banking and regulated payment environments.
• Experience with REST, SOAP, SFTP, XML/JSON, message queues, and SQL Server.
• Secure coding practices and familiarity with Docker.
• Excellent English communication skills.

Nice to have

• Experience with core banking systems or digital wallets.
• Knowledge of cut-off times, clearing, and settlement processes.

Culture & Benefits

• Opportunity to work on a fintech project delivering greenfield payment initiatives.
• Work in a hands-on engineering role focused on modern payment platforms.