Backend Engineer – Validator Engine Specialist (Romania) (#APR26)

KOR Financial

12h•Remote

About The Position

KOR is a VC-backed fintech company that innovates financial markets with cutting-edge solutions for regulatory trade reporting. They have a live product and a growing list of institutional clients, with services expanded across the US, Canada, UK, EU, Australia, and Singapore. KOR is built on leading-edge cloud technology by industry domain experts and world-class in-house engineering, aiming to solve challenging problems in data utility, quality, and processing inefficiencies for B2B trade servicing. The company fosters a culture of teamwork, focus, and encourages skilled individuals to take responsibility and grow their careers, operating under the mantra of 'work humble, work smart, and work together'. As a Backend Engineer in the Validator Team, the role focuses on maintaining and enhancing a custom-built validator engine. This system is crucial for ensuring regulatory messages sent to financial regulators meet stringent accuracy requirements, utilizing a JSON-based DSL for production rules and integration test scenarios, which includes over a million hand-written test cases.

Requirements

Detail-oriented perfectionists who take pride in covering all their bases
Energized by solving repetitive, complex problems systematically
Open to coaching by senior engineers with deep experience
Excellent communicators with strong English skills
Assertive team players who value collaboration
Bachelor's Degree or higher in Engineering, Computer Science, or Information Technology
Residing in or near the CET time zone (including Eastern Europe)
Passionate for delivering high-quality, maintainable code
A minimum of 3+ years of experience as a Backend Engineer
Experienced with Java and Spring Boot Framework
Eager to learn quickly under mentorship
Demonstrating a firm reliance on unit testing and mocking frameworks
Self-motivated and take ownership of their work

Nice To Haves

Prior experience with DSLs or regulatory systems

Responsibilities

Configuring and maintaining the validator engine to meet jurisdictional requirements
Extending the rules engine (written in Java) to support new use cases
Implementing, debugging, and refining JSON-based DSL rules for accuracy and compliance
Using Claude Code and other AI tools responsibly to boost productivity
Collaborating with other team members to support ten jurisdictions
Ensuring thorough testing and validation of all configurations

Benefits

Mentorship by senior engineers with experience at companies like Pivotal (including ex-Spring team members), VMware, Confluent (including Kafka committers), and Apple
The chance to join a rapidly growing team with the opportunity to move into the broader engineering organization
A collaborative, remote-friendly environment
Culture of trust, kindness, empowerment, and constructive feedback
Competitive salary, great IT equipment, and expense allowance
Flexible working times
Fully Remote
A span of control that matches your ambitions and skills
Commitment to a genuine, balanced relationship
We will listen to you, take your needs and wishes seriously, and work to help you grow professionally