About the role

Provide technical leadership in projects.
Design and maintain high-quality payment products.
Implement features with a focus on scalability.
Participate in code reviews and architectural discussions.
Engage in a collaborative and agile environment.

Skills the posting asks for

Ruby on Rails
PostgreSQL
Go
Docker
AWS

Summarised from the employer’s posting, which is reproduced in full below.

The employer’s full posting

About CoinGate

CoinGate is a Lithuanian fintech company founded in 2014 and one of Europe's leading cryptocurrency payment gateways. We help thousands of businesses worldwide accept 70+ cryptocurrencies with settlements in EUR or crypto - simple integrations, transparent pricing, and full regulatory compliance under MiCA.

With a decade of experience, we’ve established ourselves as one of the leading players in crypto payments, and we’re only getting started.

As a Senior Ruby on Rails Engineer, you will provide technical leadership, ensure code quality, optimize performance, and foster innovation within the company's software development projects.

Your Responsibilities:

Collaborate closely with the Product Owner and development team throughout the entire software development lifecycle.
Design, develop, and maintain high-quality cryptocurrency payment products and features, ensuring scalability, security, and efficiency.
Implement new features, optimizations, and bug fixes while maintaining high coding standards.
Follow and advocate for best industry practices, coding standards, and security protocols within the team.
Actively participate in code reviews, scope estimations, and architectural design discussions to ensure robust and maintainable solutions.
Engage in daily standups, sprint planning, and retrospectives, contributing to a collaborative and agile development environment.
Work on API development and integrations, ensuring seamless communication between services and external platforms.
Optimize system performance, troubleshoot issues, and proactively identify areas for improvement.

Our stack:

Backend: Go, Ruby on Rails
Frontend: Next.js, Tailwind
Infrastructure & Cloud: AWS, Google Cloud, Kubernetes, Pulumi, ArgoCD, IaC
Databases & Messaging: PostgreSQL, MySQL, Kafka, GraphQL, Redis, ElasticSearch
Monitoring & Observability: Grafana, Prometheus, Loki
Tools & Workflow: GitHub, Jira, Slack, N8N, Cursor, Powerfull Macbook Workstation, AI Code Reviews

Requirements:

4+ years of professional experience in Ruby on Rails development
Strong understanding of object-oriented programming (OOP), design patterns, and best coding practices
Experience with relational databases (PostgreSQL, MySQL)
Proficiency in RESTful API and GraphQL API design and development, including authentication and authorization mechanisms
Familiarity with microservices architecture and experience working with Docker and containerized applications
Hands-on experience with CI/CD pipelines, Git version control, and DevOps practices
Experience with cloud platforms (AWS, GCP) and infrastructure-as-code (Terraform) is a plus
Understanding of cryptography, security best practices, and performance optimization in web applications.

What we offer:

A modern office in the heart of Vilnius
Flexible hours and remote work options to support work-life balance
Coffee, snacks, and benefits including health insurance and employee perks
Competitive salary and opportunities for career growth
Engaging team-building activities, occasional workations in Lithuania and abroad
A collaborative, positive environment that encourages ownership and continuous improvement

If you're excited about the prospect of shaping the future of cryptocurrency payments and thriving in a dynamic, innovative environment, we'd love to hear from you!

Salary:

6000 - 9000 €/monthly gross.

We are open to discussing a different salary based on your skills and experience.