Company Overview

A growing financial technology organisation focused on digital financial infrastructure is seeking an experienced Fintech API Integration Engineer. The organisation develops technology-driven financial services that connect banking platforms, payment providers and third-party financial applications.

Its engineering environment focuses on secure integrations, reliable data exchange and scalable financial technology infrastructure.

Role Summary

The Fintech API Integration Engineer will design, develop and maintain integrations between fintech applications, banking systems, payment gateways and external financial service providers.

The role involves building dependable API connections that enable secure financial data exchange, transaction processing and communication between interconnected platforms. The successful candidate will work closely with software engineers, product specialists and technical operations teams to ensure that integrations meet performance, reliability and security expectations.

Key Responsibilities

• Design and implement RESTful API integrations between fintech applications and external financial platforms.

• Develop secure connections with banking APIs, payment gateways and financial data providers.

• Build integration services supporting account information retrieval, transaction initiation and payment status updates.

• Implement authentication and authorisation mechanisms, including OAuth 2.0 and API key management.

• Develop data transformation processes for different financial messaging formats.

• Troubleshoot API failures, connectivity problems and integration-related transaction errors.

• Implement webhook processing for real-time payment notifications and financial event updates.

• Maintain integration documentation, technical specifications and API usage guidelines.

• Collaborate with backend developers to improve the reliability and scalability of financial integrations.

• Conduct integration testing and support deployment activities.

• Monitor API performance and investigate latency, availability and data consistency issues.

• Apply secure coding practices when handling financial information and sensitive transaction data.

Requirements and Qualifications

• Bachelor’s degree in Computer Science, Software Engineering or a related technical field.

• Professional experience in API development and third-party system integrations.

• Strong knowledge of REST APIs, JSON, HTTP protocols and webhooks.

• Practical programming experience with Python, Java, JavaScript or TypeScript.

• Understanding of API authentication, encryption and secure data transmission.

• Familiarity with banking APIs, payment gateways or open banking integrations.

• Experience with Git, automated testing and software development workflows.

• Knowledge of SQL databases and backend integration architectures.

• Ability to diagnose complex technical issues independently.

• Strong technical documentation and communication skills.

Benefits

• Fully remote working opportunity within Estonia.

• Exposure to modern banking connectivity and payment technologies.

• Opportunity to work on technically challenging financial integration projects.

• Professional growth through continuous engineering development.

• Collaborative environment involving experienced fintech and software professionals.

• Opportunities to contribute to scalable financial technology infrastructure.

Application Instructions

Candidates should submit an updated CV outlining their API engineering experience, programming expertise and previous financial technology integrations. Relevant examples of API projects, technical documentation or integration work may also be included.

Are you interested in this position?

Apply by clicking on the “Apply Now” Button below!

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