Senior Ruby on Rails Developer

LXT is an emerging leader in AI training data to power intelligent technology for global organizations. In partnership with an international network of contributors, LXT collects and annotates data across multiple modalities with the speed, scale, and agility required by the enterprise. Our global expertise spans over 145 countries and more than 1,000 language locales. Founded in 2010, LXT is headquartered in Toronto, Canada with a presence in the United States, UK, Egypt, India, Turkey, and Australia. The company serves customers in North America, Europe, Asia Pacific, and the Middle East.

We are hiring a Senior Ruby on Rails Developer who will play a key role in developing and extending our crowdsourcing platform. You will be responsible for optimizing backend components, implementing best practices, and collaborating closely with a distributed team. You should have strong experience in Ruby on Rails development, test-driven development (TDD), and working with messaging systems like RabbitMQ.

Responsibilities:

• Develop and enhance our crowdsourcing platform using Rails 6.x and 7.x


• Apply test-driven development (TDD) best practices to ensure high-quality and maintainable code


• Optimize, refactor, and develop backend components while researching and implementing best practices


• Deliver across the full development stack, focusing on backend development while maintaining an understanding of frontend technologies


• Work with RabbitMQ and other messaging systems to implement event-driven architecture


• Collaborate closely with a remote team based in Germany and Ukraine

Qualifications:

• 5+ years of software development experience, with at least 3 years focused on Rails


• Strong experience with MySQL or other relational databases


• Deep understanding of RSpec, including FactoryBot and TDD methodologies


• Hands-on experience with RabbitMQ and event-driven architecture


• Proficiency in Unix/Linux environments


• Familiarity with Agile methodologies (Scrum, Kanban)


• Experience working in startup environments and scaling applications


• Hands-on experience with frontend development is a plus


• Knowledge of HAProxy, Monit, and infrastructure monitoring tools


• Experience with Docker and containerized deployments


• Ability to create and maintain AWS Lambda functions


• Familiarity with AWS Rekognition or other AWS AI/ML services


• Strong problem-solving mindset and ability to work independently


• Team-oriented, collaborative, and excellent communication skills


• Passion for clean, maintainable code and following best practices


• Excellent English communication skills, both written and verbal


• Technical Stack
  
  
  
  • Backend: Ruby, Rails (6.x & 7.x)
  
  
  • Frontend: JavaScript, Bootstrap
  
  
  • Databases: MySQL, MongoDB
  
  
  • Infrastructure & DevOps: AWS (including serverless), RabbitMQ, Capistrano, HAProxy, Monit, Docker
  
  
  • Messaging & Queues: RabbitMQ, experience with message-based architecture
  
  
  • Testing: RSpec, Capybara (FactoryBot & TDD tools)
  
  
  • Version Control:
    GitHub
    
    
    
  
  
  
  

Additional information:

LXT is an equal opportunity employer and ensures that no applicant is subject to less favorable treatment on the grounds of gender, gender identity, marital status, race, color, nationality, ethnicity, age, sexual orientation, socio-economic, responsibilities for dependents, or physical or mental disability. Any hiring decision is made on the basis of skills, qualifications, and experiences.

We measure our success as a business, not only by delivering great products and services and continually increasing our assets under administration and market share but also by how we positively impact people, society, and the planet.