Software Engineer - Fintech Platforms (.NET Core, React)

About the role

ONFTECH, a global Fintech and RegTech provider, is hiring a Software Engineer for its Istanbul office. The engineer designs, develops and maintains financial and regulatory technology platforms delivered to Saudi banks and fintechs, building scalable, secure and high-performance applications and integrating with critical financial systems. The role works closely with business analysts, project managers, QA engineers and customers.

Key responsibilities

• Design, develop, test and maintain scalable enterprise applications using .NET Core, React and modern software engineering practices.
• Build backend services, REST/SOAP APIs and frontend components following SOA and multi-tier architecture.
• Integrate with banking, fintech, payment, regulatory and government systems.
• Develop event-driven solutions with RabbitMQ, IBM MQ, Kafka and Redis.
• Optimise database structures, queries and stored procedures across SQL Server, Oracle, MySQL and PostgreSQL.
• Collaborate with BA, QA, DevOps and project management teams, and take part in code reviews and architecture decisions.
• Troubleshoot and debug issues across frontend, backend, integration and database layers, and support CI/CD, deployment and release planning.
• Maintain technical documentation in Confluence and Jira, and stay up to date with FinTech and RegTech trends.

Required profile

• Bachelor's degree in Computer Engineering, Software Engineering, Computer Science, IT or a related field.
• 2-5 years of software development experience, preferably in banking, fintech, payment systems or enterprise applications.
• Fluent English, written and spoken; ability to work independently and in cross-functional teams.
• Advantageous: experience integrating banking, fintech, payment, regulatory or government systems in KSA, and knowledge of secure coding and regulatory compliance.

Required skills

• .NET Core and C#
• React and JavaScript/TypeScript
• N-Tier, SOA, microservices and API-driven development
• RabbitMQ, IBM MQ, Kafka, Redis
• SQL Server, Oracle, MySQL, PostgreSQL
• Git, Bitbucket, Jira, Confluence, Jenkins

What we offer

• Hybrid work environment with a global team.
• Training programs, certifications and mentorship.
• Exposure to international clients and fintech projects.