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Contract Java Developer Startup Jobs in Vallejo, CA

Jobsbridge

Python Engineer

San Francisco, CA

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 ...

Amiri Recruiting

AI Support Engineer

San Francisco, CA · On-site

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.

Mercor

Software Developer

San Francisco, CA · Remote

$50 - $65/hr

Software Engineer, Full Stack (Python, Java, Rust, C#, C++) Type: Contract Compensation: $50-$65/hour Location: Remote Commitment: 40 hours/week Role Responsibilities * Build and ship full-stack ...

Mercor

AI Software Developer

San Francisco, CA · Remote

$90 - $110/hr

Senior Software Engineer, Full Stack (Python, Java, Rust, C#, C++) Type: Contract Compensation: $90-$110/hour Location: Remote Commitment: 40 hours/week Role Responsibilities * Build and ship full ...

Tror AI for everyone

CERO Developer

San Francisco, CA · On-site

Job Role: CERO Developer (Contract) Job Location: San Francisco, CA (100% Onsite) Job Type ... Experience in coding with C, Java * Experience in Design, development (coding), implementation and ...

Treasure

Mobile Engineer (Android)

San Francisco, CA · On-site

We're looking for another developer to join us and help build our Android app. We're a small ... Collaborating with the team on Slack and Asana Developing our Android app in Java Turning ...

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Showing results 21-40

All JobsContract Java Developer Startup JobsContract Java Developer Startup Jobs in Vallejo, CA

Contract Java Developer Startup information

See Vallejo, CA salary details

$17

$63

$87

How much do contract java developer startup jobs pay per hour?

As of Aug 15, 2026, the average hourly pay for contract java developer startup in Vallejo, CA is $63.97, according to ZipRecruiter salary data. Most workers in this role earn between $55.34 and $71.59 per hour, depending on experience, location, and employer.

What are some common challenges contract Java developers face when working at startups, and how can they prepare for them?

Contract Java Developers at startups often face fast-paced environments with shifting priorities and limited documentation. Adapting quickly to new codebases, collaborating with small, cross-functional teams, and managing ambiguity are frequent challenges. To prepare, developers should brush up on agile methodologies, familiarize themselves with popular Java frameworks, and be proactive in communicating with stakeholders. Demonstrating flexibility and strong problem-solving skills will help ensure a successful contract period.

What are the key skills and qualifications needed to thrive as a contract Java developer at a startup?

To excel as a Contract Java Developer in a startup environment, you need strong proficiency in Java programming, object-oriented design, and a solid understanding of software development lifecycles, usually supported by relevant experience or a computer science degree. Familiarity with frameworks like Spring Boot, version control systems (e.g., Git), build tools (e.g., Maven or Gradle), and cloud platforms is often required. Outstanding problem-solving ability, adaptability, and clear communication skills help you collaborate effectively and respond to rapidly changing project needs. These skills and qualities enable you to deliver robust, scalable solutions quickly and efficiently, which is critical in the fast-paced, resource-constrained startup setting.

What does a contract Java developer do at a startup?

A Contract Java Developer at a startup is responsible for designing, developing, and maintaining Java-based applications on a temporary basis, usually to help accelerate specific projects or fill short-term talent gaps. They often work on building scalable backend systems, integrating APIs, and ensuring the product can rapidly evolve as the startup grows. Their work may also involve troubleshooting, optimizing performance, and collaborating closely with other developers, designers, and product managers. Because startups are fast-paced environments, contract developers are expected to adapt quickly and deliver results within tight deadlines.

What is the difference between Contract Java Developer Startup vs Contract Java Developer Enterprise?

AspectContract Java Developer StartupContract Java Developer Enterprise
CredentialsJava certification, relevant experienceJava certification, relevant experience
Work EnvironmentFast-paced, innovative, small teamsStructured, larger teams, formal processes
Employer & IndustryStartups, tech, e-commerceLarge corporations, finance, healthcare
Search & Comparison IntentYesYes

The main difference between a Contract Java Developer Startup and a Contract Java Developer Enterprise lies in the work environment and company size. Startups typically offer a dynamic, fast-paced setting with smaller teams, while enterprises provide a more structured environment with larger teams and formal processes. Both roles require similar credentials and are sought after by companies in different industry sectors.

What are popular job titles related to Contract Java Developer Startup jobs in Vallejo, CA?

For Contract Java Developer Startup jobs in Vallejo, CA, the most frequently searched job titles are:

What job categories do people searching Contract Java Developer Startup jobs in Vallejo, CA look for?

The top searched job categories for Contract Java Developer Startup jobs in Vallejo, CA are:

What cities near Vallejo, CA are hiring for Contract Java Developer Startup jobs?

Cities near Vallejo, CA with the most Contract Java Developer Startup job openings:

Contract Java Developer Startup jobs near you
Infographic showing various Contract Java Developer Startup job openings in Vallejo, CA as of August 2026, with employment types broken down into 79% Full Time, 3% Part Time, and 18% Contract. Highlights an 81% Physical, 4% Hybrid, and 15% Remote job distribution, with an average salary of $133,067 per year, or $64 per hour.

Software Engineer (C++/Java)

Databento

San Francisco, CA • On-site, Remote

Full-time

Posted 25 days ago

Job description

The financial industry is growing at a record pace, but our data providers are still stuck in the past — with cumbersome onboarding processes, complicated APIs, slow infrastructure, and expensive licensing costs.

Databento is the market data platform for modern finance. The company provides real-time and historical data across futures, options, and equities through a unified API. By owning the entire market data stack end-to-end, Databento is the first platform of its kind to combine the performance and reliability demanded by the world's leading trading firms with a dramatically simpler developer experience. Our team includes alumni of Two Sigma, Citadel Securities, Flow Traders, Tower Research, PDT Partners, SIG, and other top quantitative firms.

We're looking for a midlevel or senior IC to join our core engineering team. You'll be responsible for implementing and maintaining our Java client library, and also working alongside our core engineering team on the most performance-sensitive parts of our codebase.

Responsibilities
  • Own and maintain our Java client library, ensuring it is robust, well-tested, and easy for external users to integrate with.
  • Design, develop, and maintain high-performance server applications in C/C++.
  • Write message parsers and feed handlers for direct market data feeds from trading venues.
  • Optimize existing codebase for high throughput (millions of messages per second, up to 40+ gigabits) and low latency (measured in nanoseconds).
  • Implement tools and libraries for petabyte-scale data processing and analysis.
  • Collaborate with the systems team to implement best practices for build, deployment, CI/CD.
  • Implement monitoring and improve application uptime.
  • Ensure smooth feature rollouts and updates.
Preferred background
  • 5+ years of full-time software engineering experience, preferably at a trading firm, tech company, or high-growth startup.
  • Strong proficiency in both C/C++ and Java.
  • Experience with C# is a plus.
  • Experience designing APIs with a strong focus on intuitive, developer-friendly interfaces.
  • Familiarity with open source best practices, including release management, versioning, changelogs, issue triage, and backwards compatibility.
  • Knowledge of systems programming, algorithms, data structures, multithreading, networked I/O, serialization, CPU architecture, kernel, and compilers.
  • Experience working with multiprocess environments.
  • Comfortable with lldb/gdb.
  • Good communication skills and work ethic for a remote workplace.
  • An interest in low-level optimization and performance engineering.
  • An interest in financial data or algorithmic trading.
Notice about phishing scams

Be cautious of phishing scams impersonating Databento that offer fake job interviews and request purchases. Official emails come only from @databento.com or us.greenhouse-mail.io (our ATS). Any other domains (e.g., databento-careers.com, databento.online) are fraudulent.

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Databento, Inc. provides equal employment opportunities to all employees and applicants without regard to race, color, religion, sex, national origin, age, disability, sexual orientation, gender identity or expression, veteran status, or genetics. In addition to federal law requirements, we comply with applicable state and local laws governing nondiscrimination in every location where we operate. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation, and training. Pursuant to applicable laws, we consider qualified applicants with arrest or conviction records. If you need an accommodation, please let us know.

Our recruiting data suggests that underrepresented applicants often downplay their skills. Even if your experience doesn't exactly match the qualifications listed, we still want to hear from you. Please apply!