Backend Developer Jobs in California, United States

Humanity Protocol seeks a Backend Developer to design, implement, and maintain robust backend services that power its decentralized finance platform. The role involves building scalable APIs, optimizing database performance, and ensuring high availability and security.

BayRock Labs seeks a Backend Developer to build scalable backend services using Node.js and Java. The role involves designing RESTful APIs, integrating with SQL and NoSQL databases, and collaborating with front‑end and product teams.

Bright Vision Technologies is a technology consulting and software development company delivering cloud, AI, data, and enterprise solutions across the United States. As a Lead Backend Developer, you will design, build, and operate foundational platforms and shared services—such as request routing, traffic management, data fan-out, caching layers, asynchronous job execution, and durable event processing—that other engineering teams rely on to deliver products.

Cognizant is seeking a Java Backend Developer within its Technology & Engineering department to serve as the primary point of contact for Java domain-related queries and issues. You will design and develop robust software applications using Spring Boot Microservices, collaborate with cross-functional teams, provide technical guidance to junior developers, and participate in architectural discussions.

Cognizant's Technology & Engineering department seeks a Java Backend Developer to serve as a developer for hybrid work model projects delivering robust commerce applications using Java Springboot Microservices and full stack engineering practices. The role guides end-to-end solution design, development, and deployment for scalable, secure, and maintainable digital products that enhance customer experiences and support core enterprise objectives in a collaborative environment.

Cognizant is seeking a Java Backend Developer to join its Commerce Full Stack Engineering team in Sunnyvale, California. In this role, you will serve as the primary point of contact for Java domain-related queries, designing and developing robust software applications using Spring Boot Microservices while collaborating with cross-functional teams and clients.

Bright Vision Technologies is a U.S.-based technology consulting and software development company delivering cloud, AI, data, and enterprise solutions. As a Lead Backend Developer, you will design, build, and operate foundational platforms and shared services—such as request routing, traffic management, caching layers, asynchronous job execution, and durable event processing—that support multiple engineering teams under high traffic with predictable latency.

Technology & Engineering at Cognizant builds robust commerce platforms. The Java Backend Developer leads end‑to‑end design and development of Java Springboot microservices, ensuring scalable, secure digital products.

As a Java Backend Developer at Cognizant's Technology & Engineering department in Sunnyvale, California, you will serve as the primary point of contact for Java domain queries and issues while collaborating with management, team members, and clients. Day-to-day, you will design and develop robust Spring Boot Microservices applications, troubleshoot complex technical issues, optimize performance, conduct code reviews, mentor junior developers, and participate in architectural discussions to align

Cognizant's Technology & Engineering team seeks a Java Backend Developer to serve as the primary point of contact for Java domain queries and issues in Sunnyvale, California. Day-to-day work includes designing and developing robust software applications using Spring Boot Microservices, collaborating with cross-functional teams, providing technical guidance and mentorship to junior developers, overseeing code reviews, troubleshooting complex issues, and optimizing application performance.

As a Sr. Java Backend Developer on Cognizant's Technology & Engineering (Architecture and Engineering) team in Sunnyvale, California, you will design and guide high-performance Spring Boot microservices and commerce-focused full stack Java solutions for enterprise digital platforms. Day-to-day, you will define microservice decomposition standards, review designs and code, collaborate with product owners and stakeholders to translate commerce requirements into technical architectures, drive codin

Also backend team builds the core infrastructure for connected EVs, delivering secure data ingestion, APIs, and fleet intelligence. The Staff Cloud Backend Developer drives architecture, improves cloud services, and ensures high availability and security across global deployments.

E2B Backend team builds the services powering the E2B Dashboard and SDK for AI agents. The role designs and owns Go APIs, auth, billing, real-time log pipelines, and optimizes data access, partnering with dashboard engineers and Core/Platform teams.

Cognizant's Technology & Engineering (Architecture and Engineering) team in Sunnyvale, California, seeks a Sr. Java Backend Developer to design and guide high-performance Spring Boot microservices and commerce-focused full stack Java solutions for enterprise digital platforms. Day-to-day work includes defining microservice decomposition and service contracts, reviewing designs and code for architectural and security alignment, collaborating with product owners and stakeholders to translate comme

CodeRoad's engineering team builds scalable e‑commerce platforms that power nationwide logistics and real‑time inventory synchronization. As a Senior Backend Java Developer you will design and implement secure, high‑performance Java microservices, integrate payment and shipping APIs, and troubleshoot production issues while collaborating with product managers and the CTO. Remote work covering Latin America, 100% remote, with flexible hours and competitive USD compensation.

As a Sr. Java Backend Developer on Cognizant's Technology & Engineering (Architecture and Engineering) team in Sunnyvale, California, you will design and guide high-performance Spring Boot microservices and commerce-focused full-stack Java solutions for enterprise digital platforms. Day-to-day work includes defining microservice decomposition and service contracts, reviewing application designs and code, collaborating with product owners and business stakeholders to translate commerce requiremen

Cognizant is seeking a Senior Java Backend Developer to join its Technology & Engineering department in Sunnyvale, California. In this hybrid role (3 days per week in a client or Cognizant office), you will serve as the primary point of contact for Java domain-related queries and issues, designing and developing robust software applications using Spring Boot Microservices.

Technology & Engineering team at Cognizant designs high‑performance Spring Boot microservices and full‑stack Java commerce solutions for enterprise digital platforms. The Senior Java Backend Developer architects scalable services, defines standards, and guides implementation across product and engineering groups.

Part Analytics, an Altium Company, builds AI-powered supply management software to accelerate product development and improve profit margins. The Software Development Engineer – Backend develops high‑quality, secure, high‑performance applications, writes unit and integration tests, and collaborates with front‑end developers.

Technology & Engineering at Cognizant builds robust commerce platforms. The Java Backend Developer leads design and development of Java Springboot microservices, ensuring scalable, secure digital products.