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Sr Back End Engineer for Streaming Data Platform

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KOR Financial

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Location:
Romania

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

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Job Description:

We are a VC-backed fintech with a live product in the regulatory trade reporting space and a growing list of institutional clients (B2B). Our product journey has started in the US with a roadmap into Canada, UK, EU, Australia, and Singapore over the next twelve months. We are a start-up on a fast paced journey to scale-up. KOR is built on leading edge cloud technology by industry domain experts and world class in-house engineering. We're on a mission to innovate B2B trade servicing starting with regulatory reporting in time for a global wave of mandated changes hitting all segments of market participants across OTC derivatives transactions. We're solving the most challenging problems around by bringing fresh designs and solutions to data utility, quality, and processing inefficiencies... while unlocking insane value for clients.

Job Responsibility:

  • Designing and implementing the streaming data platform engine and SDK
  • Implementing new features for our range of web and streaming applications and data reporting capabilities
  • Be an active voice in the platform's build-out in regards to the technical choices and implementations
  • Working closely with the broader team to embrace new challenges and adapt requirements as we continue to grow and adjust priorities
  • Using Claude Code and other AI tools responsibly to boost productivity
  • Paired programming with a growing team of Back-end, Data, and Front-end Engineers

Requirements:

  • A minimum of 8+ years of experience as a Back End Engineer
  • Experience with Java and Spring Boot
  • Experience with building and running applications on public cloud vendors like AWS
  • Working experience with one or more of the following technologies: Kafka, Kafka Streams processor API (not high-level DSL), DataBricks, EMR, DeltaFlow
  • Experience profiling, debugging, and performance tuning complex distributed systems
  • Willingness to closely collaborate by pairing
  • A firm reliance on unit testing and mocking frameworks with a TDD (Test Driven Development) mindset
  • Knowledge of OOP principles and modern development practices

Nice to have:

  • Experience with horizontally scalable and highly available system design and implementation, focusing on performance and resiliency
  • Bachelor's Degree or higher in Engineering, Computer Science, or Information Technology, or similar through experience
What we offer:
  • Working directly with seasoned international engineers with experience at companies like Pivotal (including ex-Spring team members), VMware, Confluent (including Kafka committers), and Apple
  • Culture of trust, kindness, empowerment, and constructive feedback
  • Competitive salary, great IT equipment, and expense allowance
  • Flexible working times
  • Fully remote, with fun social activities and gatherings
  • A span of control that matches your ambitions and skills

Additional Information:

Job Posted:
May 03, 2026

Employment Type:
Fulltime
Work Type:
Remote work
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