2

Freelance Remote Java Backend Developer Jobs in California

Backend Developer We are looking for a Backend Developer to design, build, and maintain the server ... Java (Spring Boot), or Ruby on Rails. * Strong knowledge of databases (PostgreSQL, MySQL, MongoDB ...

Backend Engineer Engagement: 12 month contract, T&M. Start June 8, 2026. Pacific time zone hours ... be local); others are fully remote, anywhere in the US. Must have: strong Java backend at ...

As a Senior Backend Engineer on the Xumo Software Engineering Team, you will play a key role in ... Position is office based in Irvine, CA or Philadelphia, PA,- 4 days on-site & 1 day remote. Java ...

As a Senior Backend Engineer on the Xumo Software Engineering Team, you will play a key role in ... Position is office based in Irvine, CA or Philadelphia, PA,- 4 days on-site & 1 day remote. Java ...

Java Developer

Sunnyvale, CA · On-site +1

$60.75 - $78.50/hr

JAVA backend, springboot, building micro services, working with Kafka, 2 -3 years industry ... Fully remote - PST hours o Will a Walmart badge be needed at onset or in the future? no o If hybrid ...

$129K - $168K/yr

We are looking for an experienced Senior Backend Developer to help lead efforts on the back end of ... This role will be remote to start and then will be flexibly based out of California (once covid-19 ...

Title - Net Backend Developer Client name: Retail domain Remote Visa - USC (H4, GC, GC-EAD- Non edited only) Don't share edited or fake visa copy. .NET, SQL Server Retail experience - major plus ...

next page

Showing results 1-20

Freelance Remote Java Backend Developer information

What are the key skills and qualifications needed to thrive as a Freelance Remote Java Backend Developer, and why are they important?

To thrive as a Freelance Remote Java Backend Developer, you need strong proficiency in Java, backend frameworks (such as Spring Boot), API development, and a solid understanding of databases, often supported by a degree in computer science or equivalent experience. Familiarity with tools like Git, Docker, cloud platforms (AWS, Azure), and CI/CD pipelines is typically required, and relevant certifications can be advantageous. Excellent problem-solving abilities, clear communication, and self-motivation help you deliver high-quality solutions and collaborate effectively with clients or distributed teams. These skills and qualities are crucial for delivering robust, scalable backend systems efficiently and maintaining client satisfaction in a remote freelance environment.

What are some common challenges faced by freelance remote Java backend developers, and how can they be addressed?

Freelance remote Java backend developers often encounter challenges such as managing communication across time zones, maintaining consistent code quality, and integrating smoothly with distributed teams. To address these, it’s important to establish clear communication channels, use collaboration tools like Slack or Jira, and adhere to standardized coding and documentation practices. Regularly syncing with the client and proactively sharing updates can help ensure alignment and reduce misunderstandings.

What does a Freelance Remote Java Backend Developer do?

A Freelance Remote Java Backend Developer is a software professional who specializes in building and maintaining the server-side logic, databases, and APIs for web or mobile applications, primarily using the Java programming language. Working remotely, they collaborate with clients or teams from different locations to deliver backend solutions that ensure the application's performance, scalability, and security. Their responsibilities often include designing and implementing RESTful APIs, integrating with third-party services, fixing bugs, and optimizing backend processes. As freelancers, they typically manage their own schedules and work with multiple clients or projects.
What are popular job titles related to Freelance Remote Java Backend Developer jobs in California? For Freelance Remote Java Backend Developer jobs in California, the most frequently searched job titles are:
What job categories do people searching Freelance Remote Java Backend Developer jobs in California look for? The top searched job categories for Freelance Remote Java Backend Developer jobs in California are:
What cities in California are hiring for Freelance Remote Java Backend Developer jobs? Cities in California with the most Freelance Remote Java Backend Developer job openings:
Infographic showing various Freelance Remote Java Backend Developer job openings in California as of May 2026, with employment types broken down into 100% Full Time. Highlights an 100% Remote job distribution.
Java Back end engineer - Remote

Java Back end engineer - Remote

Lorven Technologies

San Francisco, CA • On-site, Remote

$142K - $184K/yr

Full-time

Posted 2 days ago


Job description

I hope you are doing well,
Please share your updated profile if you are interested in the below role.
Our client seeks an Java Back End Engineer for a 12 Months project in Remote .Below is the detailed requirement
Job Title: Java Back End Engineer
Work location : Remote
Duration: 12 Months
Job Description:
  • Bachelor's degree preferably in Computer Science, Information technology, Computer Engineering, or related IT discipline or equivalent experience with 7+ Minimum Experience

Required Experience
  • 7+ years of hands-on experience in a professional software engineering role

Technical Expertise
Programming & Engineering Practices
  • Proficiency in Java, Scala, and Python (at least one required; others preferred)
  • Strong experience with test-driven development, including unit and integration testing
  • Experience with code deployments and CI/CD pipelines (e.g., Spinnaker or similar tools)

Backend Systems & Data Stores
  • Proficiency with databases and storage technologies such as:
    • TiDB, RocksDB, MySQL
    • Redis, Memcached
    • Key-value stores

APIs & Service Development
  • Solid understanding of Thrift and Protobuf schemas
  • Experience building, maintaining, and evolving APIs
  • Experience with web server and backend service development

Performance & Reliability
  • Working knowledge of latency, throughput, and system performance
  • Experience with load balancing and load testing
  • Hands-on experience running performance tests and optimizing code to improve efficiency and scalability

Nice to Have
  • Experience with data-centric application development
  • Experience working with SQL, Hive, Presto/Trino, and Spark
  • Familiarity with AI coding assistants such as Claude Code and GitHub Copilot

Example Projects & Areas of Impact
Pipeline Migration & Offline Systems
  • Offline counterfactual scoring - support pipeline migration
  • Search simulator - support pipeline migration
  • Offline interaction detection - support pipeline migration

Search, Personalization & AI Systems
  • Kendall:
    • Incorporate user-facing metrics and features for new products (e.g., Hawaii tips, filters, personalization, AI Search)
    • Support evaluation performance optimization
  • Debug tooling for personalization and AI Search, including ranking and explanation systems

Monitoring, Metrics & Developer Experience
  • Holdout:
    • Implement comprehensive monitoring for traffic and models
  • Side-by-side (SxS) metrics cleanup and UX improvements to improve developer velocity
    • Example: cleaning up messy p2 carousel metrics
    • Improving filter ranking visibility (amenity IDs vs amenity names)
  • Set up alerting for new and existing applications using Grafana and PagerDuty

Platform Health & Maintenance
  • Cleanup of:
    • Old and deprecated code
    • Retired experiments
    • Deprecated trebuchets and legacy components

Lorven technologies logo

About Lorven technologies

Sourced by ZipRecruiter

Lorven Technologies, headquartered in Plainsboro, New Jersey, United States, is a reputable company in the technology industry, specializing in providing effective IT solutions and consulting services. The company's official website, lorventech.com, offers comprehensive insights into its offerings which include but are not limited to software development, IT consulting, project management, and business analysis. Since its inception, Lorven Technologies has been committed to ensuring efficiency and reliability in delivering IT services to its global clientele, establishing itself as a trusted name in the industry.

Industry

It services

Company size

51 - 200 Employees

Headquarters location

Plainsboro, NJ, US

Year founded

2001

Social media