Senior Software Engineer - Ruby On Rails

Cendyn; Hyderabad; Hybrid; INR 2,200,000 - 3,800,000; Full time

Job summary

JobScore, Inc. in Hyderabad, India, seeks a Senior Software Engineer to design, develop, and maintain backend services for an enterprise SaaS CRM built with Ruby on Rails and modern technologies.

You will contribute to architecture, APIs, and scalable data-driven applications supporting global customers. You will lead with TDD, build RESTful APIs, work with MongoDB, Redis, Elasticsearch, Sidekiq, and Git in an agile environment.

Qualifications

• Bachelor's degree or equivalent combination of education and relevant experience.
• 6+ years of professional software development experience.
• Strong experience with Ruby on Rails and backend web app development.
• Experience designing and maintaining RESTful APIs.
• Experience with NoSQL databases (MongoDB preferred) and data modelling.
• Hands-on experience with background job processing (Sidekiq).
• Experience with caching and messaging (Redis).
• Familiarity with search platforms (Elasticsearch).
• Hands-on testing with TDD and automated tests.
• Experience in Agile/Scrum environments and Git workflows.
• Exposure to secure coding, authentication, and authorization concepts.
• Experience with AI-powered developer tools like GitHub Copilot.

Responsibilities

• Collaborate with engineers, architects, product managers, and QA to design, build, and maintain scalable applications.
• Analyze requirements to determine feasibility and propose software solutions.
• Design, develop, and maintain backend services and APIs using Ruby on Rails.
• Write clean, testable code following TDD principles.
• Build and maintain RESTful APIs focused on performance and reliability.
• Contribute to system architecture and scalable service patterns.
• Develop and execute automated tests (unit, integration, system).
• Ensure security, performance, and reliability standards are met.
• Evolve engineering standards and best practices across the team.
• Develop and maintain technical specifications and documentation.
• Estimate development tasks based on requirements and constraints.
• Review and refactor code to improve quality and maintainability.
• Implement observability with logging and monitoring.
• Troubleshoot and resolve issues in development and production environments.
• Provide on-call support as required.
• Mentor junior developers through code reviews and guidance.

Skills

Ruby on Rails

REST APIs

TDD

Git

Agile/Scrum

Elasticsearch

Redis

MongoDB

CI/CD

AI tools (Copilot etc.)

Tools

MongoDB

Redis

Elasticsearch

Sidekiq

Git

Docker

Job description

Job Purpose:

This role is responsible for designing, developing, and maintaining backend services for an enterprise-scale SaaS CRM platform built using Ruby on Rails and modern backend technologies. As a Senior Software Engineer, you will focus on delivering high-quality, secure, and scalable software solutions while contributing to system architecture, engineering best practices, and continuous platform improvement.

You will work across the full software development lifecycle, collaborating with cross functional teams to build reliable APIs, background processing systems, and data driven applications that support global customers.

Job Responsibilities:

Essential Functions:

• Collaborate with software engineers, architects, product managers, and QA teams to design, build, and maintain scalable applications
• Analyse business and technical requirements to determine operational feasibility and propose effective software solutions
• Design, develop, and maintain backend services and APIs using Ruby on Rails
• Write clean, maintainable, and testable code following Test-Driven Development (TDD) principles
• Build and maintain RESTful APIs with a strong focus on performance, reliability, and extensibility.
• Contribute to system architecture and technical design, including modular design and scalable service patterns
• Develop and execute automated tests including unit, integration, and system level tests
• Ensure applications meet security, performance, and reliability standards
• Follow and help evolve company software development standards and best practices
• Develop and maintain technical specifications and supporting documentation
• Estimate development tasks based on business requirements, timelines, and technical constraints.
• Review, refactor, and optimize code to improve quality, performance, and maintainability
• Validate implementations to ensure they meet functional and non-functional requirements
• Implement and promote observability practices, including logging, monitoring, and production diagnostics
• Troubleshoot and resolve software issues across development and production environments
• Ability to use effective AI prompts for code generation, testing, debugging, and documentation support
• Mentor and support junior developers through code reviews and technical guidance
• Enforce and continuously improve engineering standards, code quality, and development processes
• Provide on-call or production support as required

Requirements:

Required Education and Experience:

• Bachelor's degree or equivalent combination of education and relevant experience
• 6+ years of professional experience across software definition, design, development, testing, and deployment
• Strong experience with Ruby on Rails and backend web application development
• Experience designing and maintaining RESTful APIs
• Experience working with NoSQL databases (MongoDB preferred) and data modelling concepts
• Hands-on experience with background job processing frameworks (Sidekiq or equivalent)
• Experience with caching and messaging technologies such as Redis
• Familiarity with search platforms such as Elasticsearch or similar technologies
• Hands-on experience with automated testing frameworks and TDD
• Experience working in Agile/Scrum software development environments
• Experience with source control systems such as Git, including branching and merging best practices
• Exposure to secure coding practices, authentication, and authorization concepts
• Proficiency with AI-powered developer tools such as GitHub Copilot, Cursor, or similar
• Strong analytical and problem-solving skills
• Strong written and verbal communication skills

Expected Competencies:

• Detail-oriented with strong organizational and time management skills
• Strong focus on clean code, readability, and maintainability
• Ability to pay close attention to programming style and software quality
• Strong English communication skills, both written and verbal
• Ability to mentor and train junior engineers with patience and measurable outcomes
• Ownership mindset and ability to work independently on complex problems

Work Timings:

Monday through Friday, with work hours aligned to ensure healthy overlap between India and US teams to support effective collaboration. This role operates in Hybrid Mode and requires working from the Hyderabad office at least 2 days per week.

Occasional evening or weekend work may be required to support production issues or critical business needs.

EEO Statement:

Cendyn provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, sex, national origin, age, disability or genetics. In addition to federal law requirements, Cendyn complies with applicable state and local laws governing non-discrimination in employment in every location in which the company has facilities. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training.

Cendyn expressly prohibits any form of workplace harassment based on race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, genetic information, disability, or veteran status. Improper interference with the ability of Cendyn' s employees to perform their job duties may result in discipline up to and including discharge.

Other Duties:

Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee for this job. Duties, responsibilities and activities may change at any time with or without notice.