Senior Full-Stack Engineer

100KCrossing; California City (CA); On-site; USD 150,000 - 210,000; Full time

Benefits offered by this job

Equity & bonuses

Health insurance

Job summary

Unknown is seeking an experienced Senior Full-Stack Engineer to lead design, development, and architecture of end-to-end web applications. You will build responsive UIs on the frontend while designing scalable microservices, APIs, and data storage on the backend.

Responsibilities include architecture, API development, frontend excellence, database management, and DevOps/ delivery with cloud deployments (AWS/GCP/Azure). Strong coding, testing, and mentorship are essential.

Qualifications

• 5+ years of professional software engineering experience delivering full-stack production web applications.
• Strong expertise in JavaScript/TypeScript and modern frontend libraries/frameworks (React, Vue.js, Angular, Next.js) plus HTML5/CSS3 and state management.
• Deep knowledge of backend runtimes and frameworks (Node.js/Express, Python/FastAPI, Java/Spring Boot, Go).
• Solid understanding of PostgreSQL, MySQL, MongoDB, or Redis including query optimization and schema design.
• Hands-on experience with cloud platforms (AWS, GCP, or Azure), Docker, Kubernetes, and CI/CD automation tools.
• Strong grasp of OWASP security practices, asynchronous programming, system design, and architectural patterns.

Responsibilities

• Architect, develop, and maintain scalable web applications across the full stack.
• Design, build, and document RESTful and GraphQL APIs for internal/external use.
• Create responsive, accessible UIs and ensure performance across devices.
• Structure and optimize relational and non-relational databases for data integrity.
• Set up and maintain CI/CD pipelines, containerization, and cloud deployments.

Skills

JavaScript/TypeScript

React

Vue.js

Angular

Next.js

Node.js/Express

Python/FastAPI

Java/Spring Boot

Go

Databases (SQL/NoSQL)

Tools

Docker

Kubernetes

CI/CD

AWS

Job description

We are seeking an experienced Senior Full-Stack Engineer to lead the design, development, and architecture of our end-to-end web applications. In this role, you will work across the entire stack—building responsive, intuitive user interfaces on the frontend while designing scalable microservices, robust APIs, and performant data storage solutions on the backend.

Key Responsibilities

• Architecture & Design: Architect, develop, and maintain high-quality, scalable web applications using modern frontend frameworks and backend technologies.
• API Development: Design, build, and document secure RESTful and GraphQL APIs for internal and external consumption.
• Frontend Excellence: Create responsive, accessible, and performant user interfaces that deliver seamless customer experiences across desktop and mobile platforms.
• Database Management: Structure, optimize, and maintain relational and non-relational databases (SQL/NoSQL) to ensure data integrity and query efficiency.
• DevOps & Delivery: Set up and maintain CI/CD pipelines, containerize applications, and deploy services to cloud environments (AWS/GCP/Azure).
• Code Quality & Mentorship: Write clean, testable code with high unit/integration test coverage while participating in peer code reviews and mentoring junior engineers.

Qualifications & Requirements

• Experience: 5+ years of professional software engineering experience delivering full-stack production web applications.
• Frontend Proficiency: Strong expertise in JavaScript/TypeScript and modern frontend libraries/frameworks (e.g., React, Vue.js, Angular, or Next.js) alongside HTML5/CSS3 and state management.
• Backend Mastery: Deep knowledge of backend runtime environments and frameworks (e.g., Node.js/Express, Python/Django/FastAPI, Java/Spring Boot, or Go).
• Data Management: Solid understanding of database systems such as PostgreSQL, MySQL, MongoDB, or Redis, including query optimization and schema design.
• Cloud & DevOps: Hands-on experience with cloud platforms (AWS, GCP, or Azure), Docker containers, Kubernetes, and CI/CD automation tools.
• Core Fundamentals: Strong grasp of web security best practices (OWASP), asynchronous programming, system design, and software architecture patterns.

Preferred Qualifications

• Experience with serverless architectures, event-driven systems (Kafka/RabbitMQ), or microservices.
• Knowledge of web performance monitoring, logging tools (Datadog, Splunk), and automated testing frameworks (Jest, Cypress, Playwright).
• Experience working in an Agile/Scrum development environment.

What We Offer

• Competitive salary with equity options and annual performance bonuses.
• Comprehensive health, dental, and vision insurance options.
• Flexible working arrangement (Remote, Hybrid, or On-site options).
• 401(k) matching and generous paid time off (PTO) policy.
• Dedicated budget for continuous education, conferences, and skill development.