We are seeking a Chief Ruby Engineer to join our team and play a key role in developing and maintaining production-grade payment systems for the BigCommerce platform.This position is ideal for professionals with a strong engineering background, a passion for high-impact domains like e-commerce payments, and the flexibility to work shifts starting at 10 pm or 2 am Kyiv time. ResponsibilitiesDesign, implement and maintain features in a Ruby on Rails service for the payments offering on the BigCommerce platformEnsure production-grade functionality with comprehensive test coverage, instrumentation and documentationTroubleshoot production issues and contribute to post-incident reviews to enhance reliabilityCollaborate with a global team, primarily working with peersParticipate in agile ceremonies including weekly planning, demos and retrospectivesWork closely with engineering, product and customer support groups to deliver high-quality solutions Requirements7+ years of professional backend development experience with a strong focus on Ruby on RailsKnowledge of building and operating production-grade systems including logs, traces, metrics and feature flagsFamiliarity with observability tooling such as Prometheus, Grafana, Sentry or LightstepUnderstanding of Domain Driven DesignExperience integrating with third-party APIs and services, especially those with nuanced state transitions like payment flowsSkills in writing testable, maintainable and clean code with continuous integration/deployment practicesBackground in payments, fintech or ecommerce platformsExcellent written and verbal communication skillsFlexibility to work fully remote with timezone overlap with Sydney (AEST/AEDT)Capability to maintain a product-focused mindset and understand the "why" behind the work We offerWith us you can:Work on a flexible schedule remotely or from any of our comfortable offices or coworking spaces in UkraineReceive the necessary equipment to perform your work tasksChange projects and technology stacks within EPAMGain experience in various business domains (Insurance, E-commerce, Healthcare, Finance, Travelling, Media, Artificial Intelligence, and more)Relocation opportunities may be available for eligible candidates, depending on the role and openings at other EPAM locationsParticipate in volunteer, charity programs and communities (both technical and interest-based)We focus on your professional growth:You can plan your individual career path together with your managerReceive regular feedback from colleaguesImprove your English for free with certified teachers (Speaking Clubs, client interview preparation courses, etc.)Get the opportunity to undergo free training and certification in AWS, GCP, or Azure CloudsUse the internal E-learn training program (18,200+ specialized training and mentoring programs)Access corporate accounts on LinkedIn Learning, Get Abstract and other partner resourcesStudy at EPAM Solution Architecture School with the instructors who are practicing architectsDevelop as a leader, join Delivery Management, Resource Management, Leadership Essentials school and moreParticipate in internal communities (500+ meetups, technical discussions, brainstorming sessions, online events and conferences annually)What we offer:Vacation and sick leave (including a sick leave without a medical certificate)A wide range of Voluntary Medical Insurance programs providing both medical treatment and various preventive options (including sports activities)Medical insurance for family members at corporate ratesCompany support during significant life events (childbirth or adoption, marriage, etc.)Support for psychological comfort: discounts on services from mental health specialists or coaches, thematic trainingE-kids program - a free programming language training program for EPAMers' children Kindly be advised that the set of benefits, including learning, certification, and other opportunities, may vary depending on the role you apply for. Our recruiter will be able to share more details about the specific opportunity during your general interview. EPAM strives to provide its global team of over 61,700 professionals in more than 55 countries with opportunities for professional growth from day one of collaboration. Our colleagues are the source of EPAM's success, so we value cooperation, strive to always understand our clients' business and aim for the highest quality standards. No matter where you are, you will join a dedicated, diverse community that will help you realize your potential to the fullest.