Middle Java Engineer (with Python and JavaScript)

N-iX is looking for Middle Java Engineer (with Python and JavaScript) to join our team! Our customer is a global marketplace for savings and investments, providing savers with effortless access to high-yield savings accounts and investment options from over 400 partner banks worldwide. It eliminates geographic limitations, ensuring transparency, convenience, and competitive rates. For banks, it offers cost-efficient deposit funding and innovative Banking-as-a-Service solutions. As an experienced Software Engineer, you will support our payments operations and finance teams by customizing and developing new features for the team's two main services: Payments Processing Service and Oracle NetSuite. Additionally, you will contribute to building infrastructure that promotes autonomy across various cross-functional teams.

Responsibilities:

• Development and customization of Payments Processing Service and Oracle NetSuite
• Maintenance and enhancement of backend services
• Writing and maintaining automated tests
• Working with internal JavaScript/TypeScript-based NetSuite customization layer (read/adjust, not frontend development)
• End-to-end ownership of features (design → implementation → testing → deployment)
• Participation in agile workflows and stakeholder communication
• Supporting infrastructure stability and team autonomy

Requirements:

• Minimum 3 years of experience in Java.
• A strong preference will be shown for candidates possessing at least 1 year of experience in both Python and JavaScript/TypeScript.
• Experience working with AWS.
• Experience in developing and maintaining automated tests.
• Solid understanding of software engineering best practices (coding standards, test coverage, deployment).
• Bachelor’s degree in Engineering or Computer Science.
• Proficiency in spoken and written English.
• Ukrainian language Advanced or higher.

Nice-to-Have Skills:

• Familiarity with Oracle NetSuite (SuiteScript, SuiteTalk, RESTlet).
• CI/CD pipeline setup and maintenance experience.
• Proficiency with AI productivity tools (Cursor, Claude) and openness to work across diverse tech stacks.
• Previous experience within the FinTech sector will be considered a significant advantage.