Job Description

Our team is developing a payment gateway for accepting funds from users on behalf of merchants, as well as sending funds from merchants to users. The system involves storing user payment data and is subject to PCI DSS compliance. It contains multiple integrations with payment systems, providers, and other gateways and processors, including 3DS.

Job Responsibilities

Developing new payment features and services
Processing and resolving requests from technical support and users as part of daily duties
Designing and implementing APIs (external and internal)
Creating and maintaining processes in Camunda
Participating in the design and development of high-load system architectures
Supporting and enhancing existing solutions and services
Writing high-quality, test-covered code (unit tests, integration tests)
Conducting code reviews
Optimizing system performance and database queries
Analyzing and resolving production incidents and bugs
Analyzing documentation from external providers, conducting quick checks, and defining epics and tasks based on Proof of Concept
Collaborating with the QA team to ensure the high quality of the delivered product
Maintaining technical documentation and writing technical specifications
Assisting in onboarding new developers and ensuring code quality
Definition and formation of technical epics — analyzing existing solutions, identifying opportunities to improve system architecture, performance, and reliability, preparing improvement proposals, and aligning them with the team lead and architect
Participation in the creation of business epics — analyzing requirements, assessing feasibility, and proposing alternative or optimized solutions based on technical expertise; collaborating with analysts and product managers to determine the best implementation approach
Preparing tasks based on approved epics, ensuring proper detailing and alignment with architectural and business requirements
Estimating task completion timelines, participating in sprint planning, and providing accurate technical time and effort estimates

Important and Challenging Tasks

Creating and developing reliable payment solutions with high security and performance levels
Processing and resolving requests from technical support and users as part of daily duties
Optimizing the performance and scalability of payment systems
Integrating complex external providers
Participating in ensuring system compliance with high-security requirements (PCI DSS and others)

Job Requirements

You’ll thrive here if you have:

3+ years of commercial development experience with Kotlin
Experience with the Spring Framework
Experience in developing payment solutions (billing, payment gateways, payment processors, exchanges)
Practical experience integrating with external providers
Experience designing and optimizing relational databases (MySQL)
Experience with NoSQL databases (Redis)
Practical experience using AI-assisted coding tools (Claude, Codex, ChatGPT, Codeium, etc.) to improve speed and quality of development
Ability to critically review AI-generated code, ensuring production-ready quality and compliance with company standards
Knowledge of Event-Driven Architecture principles and experience working with distributed messaging systems (e.g., Apache Kafka)
Excellent command of core software development and design principles, test-driven development (TDD), and CI/CD processes
Strong understanding of microservice architecture

Preferred Qualifications

Experience with Camunda (creating and supporting processes)
Solid understanding of PCI DSS standards, ISO 27001, and other information security methodologies
Practical experience working with AWS
Experience with Jira and GitLab CI/CD

Conditions

We know that great talent deserves great conditions, so here's what you can expect when joining us:

Full remote work
Competitive compensation with a service contract
Transparent performance reviews twice a year, with bonus opportunities and salary adjustments
An annual allowance that you can use for home office improvements, sports activities, equipment upgrades, and more — tailor it to what benefits you most
Investment in your development: paid language courses, access to various learning platforms, and a mindfulness benefit, including psychological support with 50% coverage
Career growth in a fast-scaling project with opportunities to influence technical decisions
A culture of recognition: our peer reward program celebrates contributions from across the team
Benefits are provided in accordance with the company’s policies and eligibility criteria

Recruitment Process

HR interview (40 min)
Interview with hiring managers (1.5 hour)
Test task
Final interview (1 hour) optional
Recommendations check
Offer

Kotlin/Java Developer (Merchant Response)