Kotlin software contractor

Company: VANRATH
Apply for the Kotlin software contractor
Location: Belfast
Job Description:

Senior Kotlin Software Engineer (Contract)

Location: Belfast (Hybrid – 2 days onsite)Contract: 12 Months with extensionsDaily Rate: Negotiable/outside IR35

Overview

VANRATH are delighted to be partnering with a leading technology organisation to recruit a Senior Kotlin Software Engineer for a major platform modernisation programme.

This is a high-impact contract focused on developing modern Kotlin applications as part of a large-scale platform transformation, delivering secure, high-performance software supporting next-generation payment solutions.

Key Responsibilities

  • Develop and maintain production-grade Kotlin applications
  • Contribute to the modernisation of a large-scale platform
  • Collaborate with architects and engineers on system design and technical decisions
  • Write clean, scalable and well-tested code
  • Support integration, troubleshooting and continuous improvement
  • Work within Agile teams to deliver key project milestones

Essential Skills

  • Strong commercial Kotlin development experience
  • 5+ years’ software engineering experience
  • Strong object-oriented programming and software design principles
  • Experience building scalable, enterprise applications
  • Agile development experience

Desirable

  • Platform migration or modernisation projects
  • Payments, FinTech or regulated industry experience
  • JVM performance tuning, embedded systems or cloud technologies

What’s on Offer?

  • 12-month contract – very likely extension
  • Daily rate
  • Hybrid working (2 days in Belfast)
  • Long-term programme with strong extension potential
  • Opportunity to work on a business-critical platform transformation with real technical ownership

For further information on this job, apply via the link or contact the VANRATH office for a confidential chat today.

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Skills:kotlin contract. fintech

WHJS1_NI

Posted: June 26th, 2026