Senior Full Stack Engineer

Posted by InterSources Inc.

Los Angeles, CA

Permanent

Senior Full Stack Engineer
Java / Spring Boot (Backend) + React / TypeScript (Frontend)
Overview
We are seeking a highly experienced Senior Full Stack Engineer (10+ years) to design, build, and scale modern web applications. The ideal candidate will have strong expertise in Java/Spring Boot backend development and React with TypeScript for frontend development, along with experience building cloud-native microservices and scalable distributed systems.
This role requires deep technical expertise, strong system design skills, and the ability to collaborate across product, design, and engineering teams to deliver high-quality software solutions.
Key Responsibilities
Backend Development

Design and develop scalable microservices using Java and Spring Boot.
Build and maintain RESTful APIs supporting web and mobile applications.
Implement secure, reliable, and high-performance backend services.
Develop data access layers using SQL and NoSQL databases.
Integrate internal and external services through APIs and event-driven architectures.

Frontend Development

Build modern user interfaces using React with TypeScript.
Develop reusable and scalable UI components using modern React patterns (Hooks, Functional Components).
Implement state management using tools such as Redux, Zustand, or Context API.
Integrate frontend applications with backend REST APIs.
Ensure performance optimization, accessibility, and responsive design.

Architecture & System Design

Participate in architecture discussions and system design reviews.
Design modular and scalable application architectures.
Implement best practices for performance, reliability, and security.

Cloud & DevOps

Deploy and manage applications in cloud environments (AWS, GCP, or Azure).
Implement CI/CD pipelines to support automated testing and deployments.
Use containerization technologies such as Docker and Kubernetes.
Implement monitoring, logging, and observability solutions.

Collaboration & Leadership

Work closely with product managers, designers, and QA engineers.
Conduct code reviews and enforce engineering best practices.
Mentor junior engineers and contribute to engineering standards.
Drive improvements in system architecture, performance, and developer productivity.

Required Qualifications

10+ years of professional software development experience
Strong expertise in Java and Spring Boot
Experience designing and building RESTful APIs and microservices
Strong frontend development experience using React with TypeScript
Deep understanding of TypeScript, modern JavaScript (ES6+), HTML5, and CSS
Experience with SQL databases (PostgreSQL, MySQL, Oracle).
Experience with NoSQL databases (MongoDB, Redis, DynamoDB).
Experience building cloud-native applications
Strong understanding of software design patterns and system architecture

Preferred Qualifications

Experience with event-driven architectures and messaging systems (Kafka, RabbitMQ).
Experience with GraphQL APIs.
Experience with testing frameworks (JUnit, Jest, React Testing Library).
Experience with observability tools (Datadog, Prometheus, Grafana).
Familiarity with security frameworks and authentication (OAuth2, JWT).
Experience working in Agile/Scrum environments.