Back End Engineer Jobs in California

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Staff Software Engineer, Integrated Knowledge Management (RAG)

Airbnb

Remote

Full-time

Airbnb was born in 2007 when two hosts welcomed three guests to their San Francisco home, and has since grown to over 5 million hosts who have welcomed over 2 billion guest arrivals in almost every country across the globe. Every day, hosts offer unique stays and experiences that make it possible for guests to connect with communities in a more authentic way. The Community You Will Join: Providing world class customer service for our community of guests and hosts is a critical mission of Airbn

Lead Automation Quality Engineer (Backend-Focused)

INSPYR Solutions

Remote or Charlotte, North Carolina, USA

Contract

Job Description: Lead Automation Quality Engineer (Backend-Focused)Location:Remote (Preferred: Charlotte, Atlanta, Toronto)Duration:6 months (Contract with possible extension)Overview:We're building a next-gen financial processing platform modernizing a complex, legacy SQL Server system into cloud-native microservices. We need a hands-on QA automation lead to build and own the automation framework, focusing on backend validation, test data tooling, and end-to-end service integrity.This is a gree

Remote Senior / Principal Software Developer (Back End)- Healthcare AI

Oracle Corporation

Remote

Full-time

Job Description Job Description: Are you ready to embark on a journey that will revolutionize healthcare and improve patient outcomes on a global scale? The Oracle Health division is leading the charge in healthcare innovation, and we are seeking an exceptional Principal Member of Technical Staff to join our Clinical Digital Assistant (CDA) team where you will be at the heart of this transformative mission. The Role: As a Principal Member of Technical Staff, you will be a key contributor to th

Senior Java Backend Developer

Caspex Corporation

Sunnyvale, California, USA

Contract, Third Party

Position: Senior Java Backend Developer Location: Sunnyvale, CA Duration: 12+ Months Qualifications 10+ Years of Solid experience in large scale distributed systems and event-driven architecturesDesign and develop microservices for large scale software applications.Solid experience in NoSql technologies like Cassandra, MongoDBBuild n-tier applications using RESTful Services, Java/J2EE, and related technologies.Full Stack Software engineer to work in the Accessibility team to build and maintain

Senior Node/AWS Developer

Anagh Technologies Inc.

San Francisco, California, USA

Full-time, Contract, Third Party

Title: Node/AWS Backend Developer Skills: Javascript, Typescript, Node.js, Nestjs, MongoDB, Microservices, AWS, EC2, Lambda, GraphQL, Serverside, API, Redis, Hapi Overview: We have 2 positions for a Node/AWS Developer at Walmart which is HYBRID in Dallas, TX or Sunnyvale, CA. They need candidates who are strong with Node.js and AWS. Client: Walmart Location: HYBRID in TX/CA Duration: 15 months Role: Node/Backend Developer Must Have: AWS Dynamo NestJS AWS Lambda AWS S3 AWS - SNS/SQS JavaScr

Senior .NET Lead Developer/Architect

Triune Infomatics Inc

Santa Clara, California, USA

Contract

Role: Senior .NET Lead Developer/Architect Location: Santa Clara, CA Duration: 6+ Months Contract to Hire Job Description: We are looking for a passionate and experienced Full Stack or Back-End Developer with a strong foundation in Microsoft technologies. The ideal candidate will be responsible for building and maintaining high-performance web applications using .NET Core, C#, ASP.NET, and MVC frameworks. You will also work with SQL Server to manage data storage and retrieval, and use Git for v

Senior Back End Developer

Confidential Company

Remote

Contract

We are an award-winning team of very trusted and respected technologists looking for a senior back end developer to join our team for a 100% remote project. Must have deep expertise in back end development and API development, with solid understanding of Python and interested in working with Python. This is a contract role, paid hourly c2c, and can be 20 hours per week, 30 hours per week, or 40 hours per week. Sound like a fit? Let's talk!

Backend .Net Developer

CSI Companies

Costa Mesa, California, USA

Contract

Backend .Net Developer - Costa Mesa, CA - Hybrid CSI Companies is hiring a highly qualified Backend .Net Developer for a comprehensive global provider of cloud-based Human Capital Management solutions and Business Process Outsourcing (BPO) services, analytics and compliance located in Costa Mesa, CA. As a Fullstack .net developer you'll bring your 3+ years of experience developing and maintaining applications built using the .NET framework. They must have a deep understanding of the front-end a

Oracle PL-SQL Developer

APN Software Services, Inc

Remote

Contract

Client: Sedgwick Claims Management Services, Inc. Title: IT Software Development Specialist Sr. Duration: 12 months contract to hire This position is Contract to Hire and Open to Remote. Must be willing to convert to colleague after 90 days worked. Managers will be asking for salary requirements during interview process Pay Rate: $51.07/hr on W2 MANAGER'S NOTES: Oracle ETL backend developer: 5+ years of PL/SQL & Oracle Database development experience Recent Oracle PL/SQL development experienc

Checking in- (100% remote considered) Are you interested in a Technical Lead-Backend opportunity to work with a company focused on metabolic health

VortexLink

Mountain View, California, USA

Full-time

Job Description Technical Lead-Backend Full Time position-Office located in Mountain View, CA (100% remote considered) We are looking for a Technical Lead to join our Nutrition Pod, where you ll play a key role in developing and optimizing our nutrition database, food logging experience, and nutrition recommendation engine critical components of the WholeBody Digital . This is an exciting opportunity to work at the intersection of healthcare and advanced technology, collaborating with backend,

Technical Lead - ETL & Backend Integration (Insurance)

Acunor Infotech

New Jersey, USA

Full-time

Tech Stack: ETL Tools, Data Pipelines, DevOps We're looking for a Technical Lead to architect and guide backend data integration efforts within large-scale insurance systems. You will own the ETL design, technical reviews, and vendor oversight, ensuring secure, performant, and standards-compliant data flows. Responsibilities: Design and approve architecture of ETL pipelines and backend systems Ensure compliance with enterprise data and security standards Conduct code reviews, approve data mapp

Backend Architect (NodeJS)

Photon

Remote

Contract, Third Party

We are seeking a highly skilled and experienced Tech lead with expertise in Node.js, API to join our agile development team. The ideal candidate will be responsible for building scalable web applications, RESTful APIs, and contributing to cloud-native architecture. Key Responsibilities: Develop and maintain scalable backend services using Node.js (Express/NestJS). Build responsive, high-performance frontends with React.js, Redux, and modern JavaScript (ES6+). Design and implement RESTful APIs an

API & Kafka Automation Engineer (Python Backend)

Nous Infosystems

Remote

Contract

Job Title: API & Kafka Automation Engineer (Python Backend) NYC - Remote Job Description: We are seeking an Automation Engineer with expertise in API testing, Kafka, and Python backend development. The role involves building automated test frameworks, validating Kafka data streams, and ensuring the performance and reliability of APIs and backend systems. Key Skills: Strong experience in API automation and Kafka (producers/consumers).Proficient in Python for scripting and backend logic.Hands-on w

Full stack Lead (React, Node and Vue JS-Java Backend)- San Francisco, CA (On-Site)

TechAffinity Inc

California, USA

Contract

Role: Full-Stack Lead (React, Node and VueJS-Java Backend) Location: San Francisco, CA (On-Site) Duration: 12 Months Client: PHOTON/WSI Key Responsibilities Lead the technical design, architecture, and development of scalable web applications. Collaborate with product managers, UX designers, and stakeholders to translate business needs into technical solutions. Oversee the full software development lifecycle, from planning to deployment and monitoring. Write clean, maintainable, and well-docum

Technical Full Stack Lead (Front end -React, Angular, Vue + Back end Node.js, Python, Java)

Photon

San Francisco, California, USA

Full-time, Third Party

Role- Technical Full Stack Lead (Front end -React, Angular, Vue + Back end Node.js, Python, Java) Location - SFO , CA (Vue.js Exp is mandatory) For the past 20 years, we have powered many Digital Experiences for the Fortune 500. Since 1999, we have grown from a few people to more than 4000 team members across the globe that are engaged in various Digital Modernization. Our current focus and innovation in Digital Hyper expansion TM offers nearly limitless opportunities for career growth. For a br

Back End Web Developer

West Advanced Technologies, Inc.

Los Angeles, California, USA

Contract, Third Party

Job Title: Back End Web Developer Location: Los Angeles, CA, 90012 Duration: 12 Months Position Description A Back End Web Developer uses modern, open source software to prototype and deploy back end web applications, including all aspects of server-side processing, data storage, and integration with front end development. The Back End Web Developer will perform web development using open-source web programming languages (e.g., Ruby, Python) and frameworks (e.g., Django, Rails); develop and co