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Software Developer Back End Jobs in California (NOW HIRING)

Sleeper

Software Engineer, Backend

San Francisco, CA · On-site

$140K - $185K/yr

About the Role We're looking for a Software Engineer - Backend to help us scale the core systems behind our fantasy sports and DFS (Daily Fantasy Sports) offerings. In this role, you'll build and own ...

Sleeper

Software Engineer, Backend

San Francisco, CA · On-site +1

$140K - $185K/yr

About the Role We're looking for a Software Engineer - Backend to help us scale the core systems behind our fantasy sports and DFS (Daily Fantasy Sports) offerings. In this role, you'll build and own ...

Walmart

Senior Software Developer

Sunnyvale, CA · On-site

$117K - $234K/yr

We are seeking a talented and passionate Senior, Software Engineer (Back End), you will be part of Catalog Engineering team and will be responsible for developing high performance and scalable ...

Walmart

Senior Software Developer

Hayward, CA · On-site

$117K - $234K/yr

We are seeking a talented and passionate Senior, Software Engineer (Back End), you will be part of Catalog Engineering team and will be responsible for developing high performance and scalable ...

Walmart

Senior Software Developer

San Jose, CA · On-site

$117K - $234K/yr

We are seeking a talented and passionate Senior, Software Engineer (Back End), you will be part of Catalog Engineering team and will be responsible for developing high performance and scalable ...

Walmart

Senior Software Developer

Fremont, CA · On-site

$117K - $234K/yr

We are seeking a talented and passionate Senior, Software Engineer (Back End), you will be part of Catalog Engineering team and will be responsible for developing high performance and scalable ...

Walmart

Senior Software Developer

Mountain View, CA · On-site

$117K - $234K/yr

We are seeking a talented and passionate Senior, Software Engineer (Back End), you will be part of Catalog Engineering team and will be responsible for developing high performance and scalable ...

Walmart

Senior Software Developer

Milpitas, CA · On-site

$117K - $234K/yr

We are seeking a talented and passionate Senior, Software Engineer (Back End), you will be part of Catalog Engineering team and will be responsible for developing high performance and scalable ...

Walmart

Senior Software Developer

San Mateo, CA · On-site

$117K - $234K/yr

We are seeking a talented and passionate Senior, Software Engineer (Back End), you will be part of Catalog Engineering team and will be responsible for developing high performance and scalable ...

Walmart

Senior Software Developer

Cupertino, CA · On-site

$117K - $234K/yr

We are seeking a talented and passionate Senior, Software Engineer (Back End), you will be part of Catalog Engineering team and will be responsible for developing high performance and scalable ...

NAVA Software Solutions

Node JS developer

Sunnyvale, CA · On-site

$61 - $79/hr

NAVA Software solutions is looking for a Node JS Developer Details: Role: Node JS developer (Backend dev) Location; Sunnyvale, CA - Hybrid Duration: 6+ Months Skills: Node.JS & GraphQL must. Required ...

Piper Networks Inc

Software Developer

San Diego, CA · On-site

$70/hr

The Software Developer will support the development, integration, and deployment of Piper ... Develop back-end applications and services using Node.js. * Develop and maintain user interfaces ...

Neara

Software Engineer- Backend

San Jose, CA · On-site

Software Engineer- Backend Job type: Full Time · Department: Engineering · Work type: Hybrid San ... Search and analytics infrastructure * DevOps and security Qualifications * At least 2‑3 years of ...

Sleeper

Senior Software Engineer, Backend

San Francisco, CA · On-site

$170K - $220K/yr

About the Role We're looking for a Senior Software Engineer - Backend to help us scale the core systems behind our fantasy sports and DFS (Daily Fantasy Sports) offerings. In this role, you'll build ...

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Showing results 21-40

All JobsSoftware Developer Back End JobsSoftware Developer Back End Jobs in California

Software Developer Back End information

What is the difference between Software Developer Back End vs Software Developer Front End?

AspectSoftware Developer Back EndSoftware Developer Front End
Required SkillsProgramming languages like Java, Python, Ruby; server, database, API developmentHTML, CSS, JavaScript; UI/UX design; client-side scripting
Work EnvironmentServer-side, database management, API developmentWeb browsers, user interfaces, client-side applications
Common UsageBuilding and maintaining server logic, databases, APIsDesigning and implementing user interfaces and experiences

While both roles involve web development, Software Developer Back End focuses on server-side logic, databases, and APIs, whereas Software Developer Front End concentrates on user interfaces and client-side interactions. Understanding these differences helps in choosing the right career path or collaboration focus within software development teams.

Are back end software developers still in demand?

Back end software developers are currently in high demand due to the ongoing need for server-side programming, database management, and API development across industries. Skills in languages like Java, Python, and Node.js, along with experience in cloud platforms, enhance job prospects in this field.

What does a back-end software developer do?

A back-end software developer designs, builds, and maintains the server-side components of applications, including databases, APIs, and server logic. They work with programming languages like Java, Python, or Node.js and often use tools such as version control systems and frameworks to ensure efficient data processing and application performance.

What cities in California are hiring for Software Developer Back End jobs?

Cities in California with the most Software Developer Back End job openings:

Infographic showing various Software Developer Back End job openings in California as of August 2026, with employment types broken down into 82% Full Time, 13% Part Time, and 5% Contract. Highlights an 85% Physical, 4% Hybrid, and 11% Remote job distribution.

Software Engineer, Backend

San Francisco, CA • On-site

Sleeper
Software Development • 1 - 10 employees
Learn more about Sleeperexternal

$140K - $185K/yr

Full-time

Medical, Dental, Vision, Retirement, PTO

This job post has expired today. Applications are no longer accepted.

Job description

About Sleeper
Sleeper is on a mission to connect people over sports through games and community. As one of the fastest-growing platforms in the fantasy sports and real-money gaming space, we're redefining how sports fans engage-whether it's through season-long leagues, pick'em contests, or real-time interactions with friends.
Our team is lean, passionate, and product-driven. We obsess over user experience and believe that building delightful, fast, and reliable products is the best way to grow. Backed by some of the most respected investors in Silicon Valley, including Andreessen Horowitz and General Catalyst, we're building the future of sports engagement.
About the Role
We're looking for a Software Engineer - Backend to help us scale the core systems behind our fantasy sports and DFS (Daily Fantasy Sports) offerings. In this role, you'll build and own critical backend services, and collaborate with fellow engineers as we scale to support tens of millions of passionate sports fans.
You'll collaborate cross-functionally to bring innovative features to life-from real-time contest engines and game logic to personalized content and secure, seamless payments. You'll own significant parts of the backend stack and help raise the bar for performance, scalability, and reliability at Sleeper.
What You'll Do
  • Design and build core backend systems that power Sleeper's games and real-time user experiences-fantasy contests, Sleeper Picks, user profiles, leaderboards, and more.
  • Build scalable, distributed systems capable of handling millions of concurrent users with low latency and high availability.
  • Own backend initiatives from concept to deployment, ensuring clean interfaces, well-documented services, and resilient infrastructure.
  • Optimize system performance and proactively address bottlenecks through monitoring, profiling, and capacity planning.
  • Collaborate cross-functionally with product, design, and frontend teams to deliver features that users love.
  • Contribute thoughtful code reviews and help strengthen backend engineering best practices and standards.
    Who You Are
  • 3+ years of backend software engineering experience.
  • Proven ability to build and scale distributed systems that serve millions of users in real-time or gaming environments.
  • Strong proficiency in one or more backend languages (e.g., Go, Python, Node.js, Java), and an understanding of trade-offs between them.
  • Solid knowledge of databases (both SQL and NoSQL), caching strategies, and message queues (e.g., Kafka, RabbitMQ, Pub/Sub).
  • Comfortable designing and maintaining RESTful and/or graphql APIs, data models, and internal tooling.
  • Cloud experience (AWS, GCP, or similar), with familiarity with containers (Docker) and orchestration (Kubernetes a plus).
  • Strong product mindset-you care about the why, not just the how, and you build with users in mind.
  • Excellent communication and collaboration skills.
  • Bonus: Proficiency in Elixir
  • Bonus: Passion for sports, gaming, or building multiplayer or real-time systems.
    Why Join Sleeper?
  • Massive Impact - Your work will touch millions of users and help shape the next generation of sports entertainment.
  • High Ownership - We trust our engineers to make high-leverage decisions and drive meaningful outcomes.
  • Startup Agility - Move fast, ship often, and see your work in the hands of users quickly.
  • Culture-First Team - We're a team of builders, thinkers, and sports lovers who value humility, collaboration, and having fun along the way.
    What We Offer
  • Competitive salary ($140,000-$185,000) /year not inclusive of stock options and benefits)
  • Equity
  • Comprehensive medical, dental, and vision insurance
  • 401(k)
  • Generous PTO and flexible remote work policy
  • Opportunities for fast career growth in a high-impact role
  • A small, focused team where your contributions truly matter

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