Senior Software Developer

Lensrentals; New York (NY); On-site; USD 140,000 - 170,000; Full time

Job summary

Lensrentals is seeking a Senior Full Stack Software Developer in New York to lead the design, development, and maintenance of complex applications across the full technology stack. You will drive architecture decisions and mentor engineers while delivering scalable solutions that support core operations.

Ideal candidates have 6+ years in software engineering, strong distributed systems experience, and deep knowledge of Ruby on Rails, React, GraphQL, SQL, Docker, Kubernetes, AWS, and Git.

Qualifications

• Bachelor's degree in CS/Software Engineering or related field.
• 6+ years of professional software engineering experience.
• Experience with distributed systems in production environments.
• Strong full-stack knowledge across front-end, back-end, and databases.
• Proficiency with Ruby on Rails, React, GraphQL, SQL, Docker, Kubernetes, AWS, and Git.
• Ability to lead technical projects and mentor engineers.
• Excellent problem solving and communication skills.

Responsibilities

• Designs, develops, tests, and maintains complex software across front-end, back-end, and databases.
• Leads technical design and architecture discussions, guiding approach and implementation.
• Translates business requirements into technical specs and working software.
• Conducts code reviews and enforces coding standards and best practices.
• Mentors junior and mid-level engineers and guides their growth.
• Identifies and resolves complex defects and performance issues.
• Drives continuous improvement of systems, processes, and team capabilities.
• Maintains technical documentation per departmental standards.

Skills

Full stack development

React

Ruby on Rails

GraphQL

SQL

Docker

Kubernetes

AWS

Git

TypeScript

Go

Rust

Distributed systems

NoSQL datastores

SOLID principles

CAP Theorem

Education

Bachelor's degree in Computer Science or related field

Equivalent experience accepted in lieu of degree

Tools

Ruby on Rails

React

GraphQL

SQL

Docker

Kubernetes

AWS

Git

TypeScript

Go

Rust

Job description

The Senior Full Stack Software Developer is responsible for the design, development, and maintenance of complex software applications across the full technology stack. The role serves as a technical leader within the engineering team, driving architectural decisions, establishing standards, and mentoring junior developers while delivering reliable, scalable software solutions that support core business operations.

Essential Duties and Responsibilities:

• Designs, develops, tests, and maintains complex software applications across front-end, back-end, and database layers
• Leads technical design and architecture discussions, providing guidance on approach and implementation
• Translates business requirements into technical specifications and working software solutions
• Conducts code reviews and establishes and enforces team coding standards and best practices
• Mentors and provides technical guidance to junior and mid-level engineers
• Identifies and resolves complex software defects and performance issues across systems
• Drives continuous improvement of systems, processes, and team capabilities
• Maintains technical documentation in accordance with departmental standards

Education and/or Skill Requirements:

• Bachelor's degree in Computer Science, Software Engineering, or related field. Equivalent experience accepted in lieu of degree
• Minimum 6 years of professional software engineering experience, including 3 or more years working with distributed systems in a production environment
• Advanced knowledge of full stack development including front-end frameworks, back-end services, and relational databases
• Advanced knowledge of distributed systems architecture and NoSQL datastores
• Strong understanding of software design principles including SOLID and CAP Theorem
• Demonstrated ability to lead technical projects and mentor other engineers
• Ability to read, write, and debug code across multiple languages and frameworks. Our stack is mostly Ruby on Rails with a React frontend, with a heavy emphasis on GraphQL and SQL, and we expect confidence and competence with Docker, Kubernetes, AWS, and Git. You'll also touch some TypeScript, Go, and Rust. AI-assisted development is allowed but not required.
• Strong analytical, problem-solving, and decision-making skills
• Strong written and verbal communication skills

Physical Requirements:

Sedentary work; primarily performed at a desk in an office environment.

Ability to operate standard office equipment including computer, keyboard, and mouse for extended periods.