Senior Software Engineer Frontend

Compunnel, Inc.; Sunnyvale (CA); On-site; USD 120,000 - 150,000; Full time

Job summary

A leading technology firm is seeking a Senior Software Engineer – Frontend to develop high-quality web applications emphasizing frontend engineering. The role entails hands-on coding, performance optimization, and UI design. Ideal candidates will have over 7 years of full-stack development experience along with strong leadership abilities and familiarity with modern technologies. Responsibilities include mentoring junior developers and integrating systems effectively.

Qualifications

• 7+ years of full-stack development experience in complex web applications.
• Ability to write clean, maintainable, and testable code.
• Strong analytical and problem-solving abilities.
• Excellent verbal and written communication skills.
• Demonstrated leadership skills mentoring junior team members.

Responsibilities

• Develop and maintain frontend and backend features with a focus on coding.
• Optimize site speed and application performance.
• Design and develop RESTful APIs for system communication.
• Mentor junior team members and contribute to architectural decisions.

Skills

CSS frameworks (e.g., Bootstrap, Foundation)

Site speed optimization

SQL databases (PostgreSQL, MySQL)

NoSQL databases (MongoDB)

Asynchronous programming

Docker

Kubernetes

CI/CD pipelines

Google Cloud Platform

Microsoft Azure

Tools

Node.js

DevOps practices

Job description

The Senior Software Engineer – Frontend is responsible for developing high-quality, scalable web applications with a strong focus on frontend engineering while also contributing to backend development.

This role involves hands‑on coding, optimizing application performance, designing intuitive user interfaces, and ensuring seamless integration across systems.

The engineer will collaborate with cross‑functional teams, lead architectural decisions, mentor junior developers, and drive engineering excellence across the organization.

Key Responsibilities

• Develop and maintain frontend and backend features, spending the majority of time on hands‑on coding, debugging, and code reviews.
• Implement and customize CSS frameworks such as Bootstrap or Foundation to enhance UI functionality and design.
• Optimize site speed and overall performance, ensuring efficient resource utilization and minimal load times.
• Utilize Node.js to build scalable backend services and handle asynchronous operations effectively.
• Design and develop RESTful APIs to support secure and efficient communication between systems.
• Work with SQL and NoSQL databases for data storage, retrieval, and performance optimization.
• Mentor junior team members and foster a culture of continuous learning and improvement.
• Stay updated on emerging technologies and contribute to architectural decision‑making for frontend and backend systems.
• Collaborate with cross‑functional teams to ensure cohesive user experiences and effective system integration.
• Monitor application health, enhance quality, and address performance issues proactively.
• Contribute to innovation initiatives and advocate for the adoption of modern technologies.
• Manage project timelines and deliver high‑quality work within deadlines.
• Lead technical initiatives, provide guidance, and support cross‑team coordination.

Required Qualifications

Technical Skills

• Experience with CSS frameworks such as Bootstrap or Foundation.
• Strong understanding of site speed optimization techniques.
• Proficiency with SQL databases (e.g., PostgreSQL, MySQL) and NoSQL databases (e.g., MongoDB).
• Knowledge of asynchronous programming and event‑driven architecture in Node.js.
• Experience with backend performance optimization.
• Understanding of security best practices for application development.
• Experience with Docker, Kubernetes, and CI/CD pipelines.
• Familiarity with cloud platforms such as Google Cloud Platform or Microsoft Azure.
• Experience with DevOps practices and tools.

General Skills

• 7+ years of full‑stack development experience in complex web applications.
• Ability to write clean, maintainable, and testable code.
• Strong analytical and problem‑solving abilities.
• Excellent verbal and written communication skills.
• Demonstrated leadership skills with experience mentoring junior team members.
• Experience working in e‑commerce or marketplace environments.
• Involvement in open‑source contributions or internal platform initiatives.

Preferred Qualifications

• Experience contributing to architectural strategy and technical design.
• Background working with large‑scale, high‑performance web applications.
• Familiarity with modern frontend optimization tools and techniques.