Backend Developer Jobs in California

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Full Stack Backend Software Engineer

Critical River, Inc.

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Pleasanton, California, USA

Full-time

Title: Full Stack Backend Software Engineer Location: Pleasanton, CA (Hybrid) Duration: Fulltime with CR Years of Experience: 10+ Years Skill Set: Python with FastAPI on AWS Lambda Level: Senior - Level Brief Description We are seeking an experienced Full Stack Backend Software Engineer with a strong foundation in Python with FastApi on AWS, ReactJS & AWS. The ideal candidate will have 5 to 8 years of experience in software development and will be responsible for building, maintaining, and o
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Posted 4 days ago | Updated 8 hours ago

Staff Software Engineer

SVMT, Inc

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Redwood City, California, USA

Full-time

Are you a seasoned backend engineer with a passion for building scalable APIs and developer platforms? Join us as a Technical Leader where you ll architect and implement mission-critical backend systems that power real-time robotics, cloud infrastructure, and customer-facing integrations across industries from restaurants and hotels to warehouses and beyond. What You ll DoDesign & Build APIs: Lead the architecture and implementation of robust, versioned REST and gRPC APIs in Go, enabling real-ti
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Posted 19 days ago

Back End Web Developer

West Advanced Technologies, Inc.

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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
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Posted 60+ days ago | Updated 14 hours ago

Principal Cybersecurity Engineer

NuLeap

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Remote or US

Third Party

Job Summary (List Format): - Lead the design and implementation of secure, scalable, and high-performance cloud-based systems. - Architect and develop backend systems using Rust (Tokio, Actix, Axum, Rocket) and Scala (Akka, ZIO, Cats, Play). - Ensure secure execution environments utilizing WebAssembly (WASM). - Employ extensive AWS services (Lambda, ECS, S3, API Gateway, CloudFront, DynamoDB, GuardDuty, WAF, Security Hub, KMS) for cloud infrastructure and security. - Implement and enforce AP
Posted 27 days ago | Updated 5 days ago

Senior React Developer (10+ Years Experience) - Remote

URSI Technologies Inc.

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Remote

Third Party, Contract

Position Senior React Developer (10+ Years Experience)Location RemoteDuration 1+ Year (Extendable) Job Description: We are seeking a highly skilled Senior React Developer with over 10 years of experience in frontend development. The ideal candidate will have deep expertise in JavaScript, React.js, TypeScript, and modern UI/UX principles. You ll be responsible for leading frontend architecture, mentoring developers, collaborating with cross-functional teams, and delivering high-performance, scal
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Posted 41 days ago | Updated 4 days ago

Web Developer

Pozent

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Remote or Woburn, Massachusetts, USA

Contract

6 month plus contract opportunity Remote position - CST Overview We are seeking a skilled and reliable Web Developer / Backend Engineer to provide ongoing support and project-based development across our digital ecosystem. This includes building new websites, updating existing websites, and handling server-side tasks and remediation. Familiarity with Microsoft Azure and Kentico CMS is essential. Background Our organization operates multiple web properties and digital tools hosted primarily in
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Posted 46 days ago | Updated moments ago

Accessibility Web Developer (Mobile + Web)

Allwyn Corporation

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Remote

Contract, Third Party

NOTE:This is 4 month contract only. 40 Hrs / per week. We are looking for a skilledFront-End Developerwho can contribute across bothmobile and web (.com)platforms. The ideal candidate will have hands-on experience withAngular and Ionic frameworks, and a strong understanding ofADA complianceto ensure accessibility standards are met across all digital experiences. Responsibilities: Develop and maintain responsive and accessible applications across mobile and web platforms.Collaborate with UI/UX
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Posted 28 days ago | Updated 7 hours ago

Sr. Java Backend Developer

Caspex Corporation

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Sunnyvale, California, USA

Third Party, Contract

Job Title: Sr. Java Backend Developer Location: Sunnyvale, CA Duration: 6+ Months Job Description: Must have: Deep understanding of core java concepts. ( lambdas, multi threading, executor service etc )Ability to write highly structured ( read good at object oriented programming ), high performance java codeGood understanding of Java Memory Model and Garbage collection conceptsAbility to troubleshoot JVM issues and tune JVM for extracting max performanceFamiliarity with SQL concepts (joins, norm
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Posted 60+ days ago | Updated 8 days ago

Software Engineer, Backend

West Coast Consulting LLC

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Remote

Full-time

Job Description REMOTE JOB DESCRIPTION We're looking for a skilled Senior Backend Engineer (Contractor) to join our GraphQL API platform team. In this role, you'll focus on migrating legacy Python services to Go within our GraphQL API services. Experience with GraphQL, including GraphQL Federation and Apollo Router, is a strong plus. You'll use internal tools and processes developed by the GraphQL team to accelerate our migration from Python to Go. We're seeking someone who thrives in a fas
Posted 38 days ago | Updated 10 hours ago

Full Stack Engineer (Backend)

SmartTech Staffing Partners

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San Francisco, California, USA

Full-time

Hiring: Backend-Focused Full Stack Engineer We're looking for two experienced, backend-heavy Full Stack Engineers to help scale our AI-powered platform. This is a hands-on engineering position where you'll play a key role in building robust backend systems while also contributing to frontend development. Ideal candidates thrive in fast-paced environments, bring deep systems expertise, and approach problems with a founder s mindset. Key Responsibilities Design, build, and scale backend infrastruc
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Posted 1 day ago | Updated 1 day ago

Backend Software Engineer

Pinterest, Inc.

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Remote or San Francisco, California, USA

Full-time

About Pinterest: Millions of people around the world come to our platform to find creative ideas, dream about new possibilities and plan for memories that will last a lifetime. At Pinterest, we're on a mission to bring everyone the inspiration to create a life they love, and that starts with the people behind the product. Discover a career where you ignite innovation for millions, transform passion into growth opportunities, celebrate each other's unique experiences and embrace the flexibility
Posted 50 days ago | Updated 2 hours ago

Software Engineer, Backend

West Coast Consulting LLC

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Remote

Contract

Job Description Remote In this role, you'll focus on migrating legacy Python services to Go within our GraphQL API services. Experience with GraphQL, including GraphQL Federation and Apollo Router, is a strong plus. You'll use internal tools and processes developed by the GraphQL team to accelerate our migration from Python to Go. We're seeking someone who thrives in a fast-paced environment, excels at solving complex problems, and collaborates effortlessly across teams. Responsibilities inclu
Posted 12 days ago | Updated 10 hours ago

Backend Tech Lead (GoLang, gRPC, GraphQL)

Encora

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Fremont, California, USA

Contract

Backend Tech Lead (GoLang, gRPC, GraphQL) Location: Fremont, CA (Hybrid) Duration: 6+ months contract Strong coding skills, navigating codebases with different languages and tools (GoLang, gRPC, GraphQL), building and managing ci/cd pipelines and IaaC supporting services, web and mobile releases.Experience building comprehensive understanding of APIs, microservices, databases, integrations and other complex backend systems.Experience building large scale backend systems using AWS ecosystem tools
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Posted 7 days ago | Updated 1 day ago

Principal Backend Engineer, Materia AI

Thomson Reuters U.S. Inc.

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Remote or Eagan, Minnesota, USA

Full-time

Principal Backend Engineer, Materia AI Are you excited about building AI-driven software that redefines how professionals work? Join a dynamic and highly skilled team at Thomson Reuters, where we combine the agility and innovation of a startup with the stability and resources of a global leader. As a Lead Backend Engineer, you will play a pivotal role in developing AI-powered systems that enhance accounting workflows through automation, intelligence, and seamless orchestration. About the Role:
Posted 44 days ago | Updated 2 hours ago

Senior Backend Software Engineer

Pinterest, Inc.

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Remote or San Francisco, California, USA

Full-time

About Pinterest: Millions of people around the world come to our platform to find creative ideas, dream about new possibilities and plan for memories that will last a lifetime. At Pinterest, we're on a mission to bring everyone the inspiration to create a life they love, and that starts with the people behind the product. Discover a career where you ignite innovation for millions, transform passion into growth opportunities, celebrate each other's unique experiences and embrace the flexibility
Posted 50 days ago | Updated 2 hours ago

Senior Python Developer / Remote / Cloud & Microservices

Motion Recruitment Partners, LLC

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Remote or San Francisco, California, USA

Full-time

Job Description Join a globally recognized leader in the entertainment and media industry for a fully remote, long-term contract role focused on impactful backend development. Known for its cutting-edge technology, strong developer-first culture, and commitment to work-life balance, this company is looking to bring on a Senior Python Backend Engineer to join its high-impact platform team. You'll be contributing to the architecture and development of highly scalable backend systems, APIs, and s
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Posted 13 days ago | Updated 10 hours ago

Staff Software Engineer, Energy Design Applications

Tesla Motors

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Fremont, California, USA

Full-time

We are seeking a skilled Staff Software Engineer with a focus on backend development to join our Energy Design team at Tesla. The ideal candidate will be proficient in C# and have hands-on experience with AutoCAD libraries/plugins. This role involves designing, developing, and maintaining backend systems to support Tesla's Energy Design Model, ensuring seamless integration with various design components and databases like MySQL. You will play a critical role in enhancing our design model archite
Posted 3 days ago | Updated 2 hours ago

Core Java and SQL / Remote / Construction Planning Software

Motion Recruitment Partners, LLC

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Remote or Boston, Massachusetts, USA

Full-time

Join a small, agile team building a highly scalable, cloud-based backend powering complex data-driven web applications. This is a great opportunity for a backend engineer with strong Java and SQL expertise who thrives in a startup-like environment and enjoys tackling performance-heavy challenges. This is an opportunity to work side-by-side with the Chief Software Architect on a lean team driving architecture and core functionality. You'll be writing highly concurrent Java code and building syste
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Posted 56 days ago | Updated 10 hours ago

Senior Python Developer / AWS / Fully-remote

Motion Recruitment Partners, LLC

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Remote or Los Angeles, California, USA

Full-time

Job Description This is a fully remote, long-term contract opportunity with a major global enterprise operating in the entertainment and media space. The company is known for its innovative tech stack, strong developer culture, and commitment to employee well-being. They're currently seeking a Senior Python Backend Engineer to join their high-impact platform team working on scalable backend systems, APIs, and serverless cloud infrastructure. This is a rare opportunity to work behind-the-scenes
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Posted 14 days ago | Updated 10 hours ago

Backend Software Engineer, Global Ads Demonstration

TikTok

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San Jose, California, USA

Full-time

Location : San Jose Employment Type : Regular Job Code : A139625A Apply to this job Share this listing: Responsibilities CommercePack team is responsible for connecting commercialization with the user community ecosystem. We provide data assembly and management for the display and interaction of advertisements, and promote a sustainable development ecosystem for advertising content.Our aim is to provide a unified platform for end-to-end commercial presentations and marketing data interact
Posted 53 days ago | Updated 2 hours ago