• Proven experience as a back-end developer or in a similar role, with a strong portfolio of successful projects.
• ORM Experience.
• Data Modeling.
• Performance considerations (i.e. Detecting and fixing n+1 queries)
• Expertise in full stack development focusing on React, web application development, GraphQL, and Apollo.
• Proficiency in HTML, CSS, JavaScript, and modern front-end frameworks.
• Strong understanding of RESTful APIs, microservices architecture, and database design.
• Familiarity with Ruby on Rails or a similar framework.
• Excellent problem-solving skills and attention to detail.
• Strong leadership and mentoring abilities.
• Excellent communication and teamwork skills.
• Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field.

Database/ORM:

• Ability to take complex product requirements and translate them into Rails Active
• Record models with relationships and associated database tables
• Write migrations to add and modify existing Postgres tables
• Understand db performance, including transactions, indexing, n + 1 queries
• and schemas
• Write Rails Active Record models that utilize underlying database tables and
• relationships
• Write SQL as needed, including a thorough understanding of foreign keys,
• joins, ordering, and complex relationship querying.
• Write rails rake tasks to migrate existing data when needed

API development:

• Develop, test, and maintain GraphQL APIs, using GraphQL Ruby
• components.
• Develop, test, and maintain Rest APIs, using Ruby on Rails components.
• Work closely with and support front-end developers who are the
• consumers of the APIs you will write
• Optimize API performance and ensure scalability using tools like NewRelic
• and Bullet Gem
• Understand batch loading and n + 1 performance issues when querying using
• GraphQL

Testing/Reviewing:

• Write rspec tests in ruby for the backend code you write
• Manually test the application in areas that you contribute to
• Conduct code reviews, providing constructive feedback to ensure
• high-quality code standards.
• Stay updated with emerging technologies and industry trends, recommending innovative solutions to enhance our tech stack.

Collaboration and Communication:

•  Work closely with cross-functional teams including designers, product managers, and QA engineers.
•  Effectively communicate complex technical concepts to non-technical stakeholders.
•  Facilitate technical discussions and decision-making processes.

• Annual paid vacation of 18 working days.
• Extra vacation days for long-lasting cooperation.
• Annual paid illness of 10 days.
• Maternity/Paternity leave.
• The opportunity for sabbatical leave.
• Marriage and Parenthood Package.
• Compensation for sports activities (up to 6000 UAH\year).
• 50 % cost compensation for attending self-development courses.
• Corporate doctor.
• Internal education(corporate library, Udemy courses).
• Career development plan.
• English and Spanish classes.
• Paying taxes and managing PE (Private Entrepreneur).
• Technical equipment.
• Internal Referral program.
• Opportunity to take part in company volunteering activities.
• Sombra is a “Friendly to Veterans” award-holder.