Kotlin/Java Developer (Fintech)

TL;DR

Kotlin/Java Developer (Fintech): Developing a secure payment gateway for merchants and users with an accent on PCI DSS compliance, high-load architecture, and external payment system integrations. Focus on designing scalable APIs, implementing complex business processes in Camunda, and optimizing database performance for financial transactions.

Location: Remote

Company

hirify.global is developing a payment gateway for accepting funds from users on behalf of merchants and sending funds from merchants to users.

What you will do

• Develop new payment features, services, and internal/external APIs.
• Design and implement business processes using Camunda 8.
• Contribute to the architecture of high-load systems and optimize MySQL queries.
• Integrate complex external payment providers and ensure system compliance with PCI DSS.
• Write high-quality, test-covered code and conduct code reviews for both backend and frontend.
• Collaborate with QA and product managers to define and implement technical epics.

Requirements

• 3+ years of commercial experience with Kotlin.
• Proficiency in Spring Framework and microservices architecture.
• Proven experience developing payment solutions such as billing, gateways, or processors.
• Experience with MySQL, Redis, and Apache Kafka (Event-Driven Architecture).
• Ability to use AI-assisted coding tools to improve development speed while ensuring production-ready quality.
• English proficiency level B1 or higher.

Nice to have

• Experience with creating and supporting processes in Camunda.
• Solid understanding of PCI DSS and ISO 27001 standards.
• Practical experience working with AWS.

Culture & Benefits

• Full remote work arrangement.
• Competitive compensation via service contract with bi-annual performance reviews.
• Annual allowance for home office improvements, sports, and equipment.
• Investment in development through paid language courses and learning platforms.
• Mindfulness benefit including psychological support with 50% coverage.
• Peer reward program and career growth opportunities in a fast-scaling project.

Hiring process

• HR interview (40 min).
• Interview with hiring managers (1.5 hours).
• Test task.
• Optional final interview and recommendations check.