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Freelance Java Developer Startup Jobs in California

Overall 3-5 years of experience as a Software Developer * Extensive experience in Java EE ... Passion to be part of a growing startup Additional Information SaveDay Offers * Competitive salary

Overall 3-5 years of experience as a Software Developer * Extensive experience in Java EE ... Passion to be part of a growing startup Additional Information SaveDay Offers * Competitive salary

Be it core Java, full-stack Java, Web/UI designers, Big Data or Cloud or Mobility developers ... ElasticSearch or Lucene - Experience in a fast-paced/customer-centric agile startup environmentSo ...

Proficiency in programming languages such as Python, Java, or Go * Strong organizational skills and ... Strong problem-solving skills and the ability to work in a fast-paced, dynamic startup environment.

Front End Developer

Newark, CA ยท Hybrid

$117K - $136K/yr

Company Description Venture-backed fintech Startup SaveDay was founded with the vision to help ... Knowledge of a strongly typed server-side language such as Java * Knowledge of a scripting language ...

Front End Developer

Newark, CA ยท On-site

$117K - $136K/yr

Company Description Venture-backed fintech Startup SaveDay was founded with the vision to help ... Knowledge of a strongly typed server-side language such as Java * Knowledge of a scripting language ...

Senior Software Engineer

Sunnyvale, CA ยท On-site

$143K - $189K/yr

Join our team, we work in a startup-like environment and you will be part of every stage of ... Apple's eBusiness services team seeks an outstanding Senior Fullstack Java Engineer to implement ...

Senior Software Engineer

Sunnyvale, CA ยท On-site

$143K - $189K/yr

Join our team, we work in a startup-like environment and you will be part of every stage of ... Apple's eBusiness services team seeks an outstanding Senior Fullstack Java Engineer to implement ...

Mobile Engineer

Pleasanton, CA ยท On-site

$50K - $58K/yr

We are looking for a phenomenal Application Developer PREFERRED SKILLS: * Expertise in LLDB, SQLite ... Previous experience with Agile and Lean Startup style development REQUIRED SKILLS: * Bachelors ...

We are looking for a phenomenal Application Developer PREFERRED SKILLS: Expertise in LLDB, SQLite ... Startup style development REQUIRED SKILLS: Bachelors degree or higher in computer science ...

WeVote, a nonpartisan nonprofit technology startup building the next generation of voting tech, has ... This remote role is perfect for journalism students building portfolios or freelance journalists ...

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Freelance Java Developer Startup information

What is the difference between Freelance Java Developer Startup vs Freelance Java Developer Corporate?

AspectFreelance Java Developer StartupFreelance Java Developer Corporate
Work EnvironmentIndependent, flexible, project-basedRemote or office-based, structured projects
Client InteractionDirect with startups or small teamsOften with corporate clients or departments
Project ScopeVaried, often innovative or MVP developmentLong-term, maintenance, or enterprise solutions
Required CredentialsJava certification, portfolio, experienceJava certification, experience, possibly more formal credentials

Freelance Java Developer Startup roles typically involve working independently on diverse projects for startups, emphasizing innovation and flexibility. In contrast, Freelance Java Developer Corporate roles often focus on structured, long-term projects for established companies, with more formal client interactions and expectations.

What are the most commonly searched types of Java Developer Startup jobs in California? The most popular types of Java Developer Startup jobs in California are:
What job categories do people searching Freelance Java Developer Startup jobs in California look for? The top searched job categories for Freelance Java Developer Startup jobs in California are:
What cities in California are hiring for Freelance Java Developer Startup jobs? Cities in California with the most Freelance Java Developer Startup job openings:
Senior Software Engineer - Agentic AI Analytics (Rust / Data Systems)

Senior Software Engineer - Agentic AI Analytics (Rust / Data Systems)

Noor Staffing Group

Los Angeles, CA โ€ข Hybrid

$132K - $174K/yr

Other

Re-posted 25 days ago


Job description

Title: Senior Software Engineer โ€“ Agentic AI Analytics (Rust / Data Systems)
Location: Glendale, CA โ€“ structured hybrid (in-office component required)
Compensation: 200,000 โ€“ 240,000 base + equity/benefits (DOE)

***NO C2C OR VISA CANDIDATES CAN BE ACCCEPTED***

Our client is building the next generation of AI-powered analytics so brands can finally see, in real time, which advertising actually works and why. This Senior Software Engineer role sits directly with the CTO on a highly visible initiative to build an agentic, AI-driven analytics engine from the ground up using Rust, Java, and modern OLAP concepts.

If you like owning hard performance problems, designing columnar/vectorized systems, and shipping code that powers decisions for the worldโ€™s biggest brands, this is a true impact seat, not a maintenance job.

Why this role

  • Direct access to the CTO and a small, senior team driving our core AI analytics strategy, not a side project.
  • Greenfield build of an Advanced Analytics Engine with vectorized query processing, columnar storage, and OLAP capabilities aimed at sub-second performance on marketing datasets.
  • Heavy Rust and Java engineering with deep performance tuning, profiling, and hardware-aware optimization on large-scale cloud-native data systems.
  • High-growth, ad measurement / analytics space with massive data volume, where your work shapes how brands, agencies, and media companies measure outcomes.
  • Structured hybrid in Glendale, CA with strong comp, equity, and full benefits, plus a culture that emphasizes performance, learning, and fun.

Ideal candidate snapshot

  • 12+ years total software engineering, including 5+ years architecting or building high-performance data/analytics or OLAP systems; 3+ years hands-on, production Rust, ideally having come from Java.
  • Deep knowledge of columnar data engines, vectorized execution, query/dataframe optimization, and performance engineering at the system and hardware levels.
  • Strong AWS experience (designing, deploying, and optimizing scalable data and compute systems in the cloud).
  • Systems thinker who sees software, data, and infrastructure as one cohesive system; comfortable in fast-moving, startup-like environments.
  • Solid statistics / data analysis foundation; bonus for exposure to AI-driven analytics and engines like Apache DataFusion, DuckDB, ClickHouse/chDB, or for refactoring large brownfield systems.