Company Overview

The organisation operates within the financial technology sector, developing digital payment solutions and financial infrastructure that support secure, efficient and scalable financial transactions. Its technology environment focuses on payment connectivity, transaction processing, financial automation and integration with banking and third-party financial service providers.

The engineering function is responsible for building dependable payment systems that enable businesses and financial institutions to manage digital transactions, automate payment workflows and improve financial service delivery.

Role Summary

The Senior Fintech Payment Integration Developer will design, develop and maintain software integrations connecting digital payment platforms with banking networks, payment processors, merchant systems and external financial APIs. The position requires strong programming capabilities, an understanding of payment infrastructure and the ability to develop reliable transaction-processing services.

The successful candidate will contribute to payment integration projects, improve existing software architecture and ensure that financial data moves securely and accurately between connected platforms.

Key Responsibilities

• Develop and maintain payment integration services connecting fintech platforms with banks, payment gateways and external financial institutions.

• Build and maintain RESTful APIs and other communication interfaces for financial transaction processing.

• Implement payment initiation, transaction confirmation, refund and reconciliation workflows.

• Develop reusable software components for connecting multiple payment service providers.

• Investigate and resolve integration failures, transaction inconsistencies and API communication errors.

• Implement secure authentication, authorisation and encryption mechanisms across payment interfaces.

• Collaborate with backend engineers, product specialists and payment operations teams.

• Improve application performance, transaction reliability and integration response times.

• Write automated tests covering payment processing, API communication and exception handling.

• Maintain technical documentation covering integration architecture, API endpoints and deployment procedures.

Requirements and Qualifications

• Bachelor’s degree in Computer Science, Software Engineering or a related technical discipline, or equivalent practical experience.

• At least four years of professional software development experience.

• Strong programming experience with Java, Python, C# or TypeScript.

• Practical experience developing REST APIs and integrating third-party financial services.

• Understanding of payment processing, transaction lifecycles and financial messaging.

• Familiarity with relational databases, SQL and data integrity principles.

• Experience with Git, automated testing and software deployment practices.

• Understanding of secure coding standards and financial data protection.

• Strong analytical, debugging and problem-solving abilities.

• Excellent written and verbal communication skills.

Benefits

• Fully remote working arrangement within Estonia.

• Opportunity to contribute to financial technology infrastructure projects.

• Professional development and continuous technical learning.

• Collaborative international engineering environment.

• Exposure to modern payment technologies, banking integrations and financial APIs.

• Opportunities to influence technical architecture and engineering standards.

Application Instructions

Interested candidates should submit an updated CV highlighting relevant software development experience, payment integration projects, programming languages and API development expertise. Applications should include a brief overview of previous fintech or financial systems projects where applicable.

Are you interested in this position?

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

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