Senior Kotlin Developer (Fintech)

TL;DR

Senior Kotlin Developer (Fintech): Designing, developing, and maintaining high-quality backend services using Kotlin under established patterns with an accent on architectural decision-making and complex feature delivery using coroutines. Focus on improving test design across the squad, ensuring production readiness and stability, and leveraging AI tools.

Location: Remote. Working schedule is aligned with the UK time zone (9am to 5:30pm UK time) and involves participating in on call shifts if required.

Company

hirify.global is a company that delivers innovative and accessible financial solutions for today's consumers.

What you will do

• Design, develop, and maintain high-quality backend services using Kotlin under established patterns.
• Work closely with cross-functional teams; own architectural decision-making and complex feature delivery using coroutines and existing frameworks.
• Define testing strategy for features or services, improve test design across the squad, identify gaps in coverage or reliability, and ensure new work meets agreed quality standards (JUnit, Kotest).
• Conduct thorough and high-quality code reviews, improving team-wide code standards.
• Participate in the full software development lifecycle, from concept and design to testing and deployment; ensure production readiness and stability, owning monitoring and incident response.
• Engage in continuous improvement practices and agile methodologies; shape technical direction, raise standards, and influence architectural choices.

Requirements

• 2+ years in writing production Kotlin code and implementing features using coroutines.
• Experience working on commercial, established products used by real customers, and operating software in production.
• Strong knowledge of testing strategies with tools like JUnit or Kotest; able to define and improve squad-wide test coverage.
• Backgrounds where quality, testing, and maintainability were prioritised alongside delivery, even under time or commercial pressure.
• Experience making architectural trade-offs (e.g. consistency vs availability, sync vs async) and being accountable for the long-term maintainability of those decisions.
• Strong command of English in both oral and written communication; ability to lead technical discussions.

Nice to have

• Strong experience with Kafka and event-driven architectures; comfortable with advanced patterns (dead letter queues, schema evolution, exactly once semantics).
• AWS Experience.
• Understanding event-driven patterns and async messaging (pub/sub, message queues); experience consuming or producing messages in at least one messaging platform.

Culture & Benefits

• Vacation as per the laws of your country.
• Health insurance policy for you and your loved ones.
• 10 days of sick pay without a doctor's note, afterwards - as per the laws of your country.
• Time off for state holidays according to the official calendar, regardless of the client’s schedule.
• Pleasant environment with two large corporate parties and many small get-togethers for colleagues.
• Comfort service solving technical and everyday problems at work.