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Freelance Remote Java Backend Developer Jobs in Florida

ITrade STEM

Lead Backend Engineer

Miami, FL · Remote

... years in backend engineering, ideally with a focus on financial systems or high-throughput ... Remote-first, async-friendly culture with flexible hours The chance to work on the cutting edge of ...

ITRADE STEM

Lead Backend Engineer

Miami, FL · Remote

... years in backend engineering, ideally with a focus on financial systems or high-throughput ... Remote-first, async-friendly culture with flexible hours • The chance to work on the cutting edge ...

Octagon Talent

Lead Backend Engineer

Miami, FL · Remote

... years in backend engineering, ideally with a focus on financial systems or high-throughput ... · Remote-first, async-friendly culture with flexible hours · The chance to work on the cutting ...

RIT Solutions, Inc.

Sr. Java Developer

Tampa, FL · Remote

$52 - $66.50/hr

Sept 30 + possible extension Location: 100% remote Submittal Deadline: Tomorrow, 3/31 US Government Client is seeking a highly skilled Senior Java Developer with extensive full-stack development ...

ARC Group

(Full stack) Java/react Developer

Jacksonville, FL · Remote

$48.75 - $62.75/hr

(Full stack) Java/react Developer - Remote ARC Group has an immediate opportunity for a(Full stack) Java/react Developer! This position is 100% remote. This is starting out as a contract position ...

The Computer Merchant, Ltd

Sr Java Developer

Jacksonville, FL · Remote

$52.75 - $67.50/hr

Remote, prefer Jacksonville, FL WAGE RANGE*: 60 - 66/ hour Must be W2 JOB NUMBER:20271 Sr. JAVA Developers are responsible for the development, programming, and coding of Information Technology ...

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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 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 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 are popular job titles related to Freelance Remote Java Backend Developer jobs in Florida? For Freelance Remote Java Backend Developer jobs in Florida, the most frequently searched job titles are:
What job categories do people searching Freelance Remote Java Backend Developer jobs in Florida look for? The top searched job categories for Freelance Remote Java Backend Developer jobs in Florida are:
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Freelance Remote Java Backend Developer jobs near you

Lead Backend Engineer

ITrade STEM

Miami, FL • Remote

Contractor

Posted 23 days ago

Job description

At ITRADE Innovations, we help create jobs and support the future of industries in space, technology, energy, and manufacturing. We do this by creating programs that help develop skills and support sustainable growth. Join us on our mission to Redefine STEM!

Our client is a well-funded Web3 fintech startup redefining the future of real-time financial infrastructure. Our platform bridges traditional finance and decentralized systems, enabling seamless, secure, and transparent access to blockchain-powered financial services. They're not just building APIs - they're creating the data rails for the decentralized economy, supporting everything from real-time transaction monitoring to decentralized asset management. With deep backing from top VCs and a founding team of fintech and blockchain veterans, we're scaling fast - and we're looking for core engineers to shape what comes next.


What You'll Do

Architect, develop, and maintain real-time APIs and backend systems powering crypto trading, DeFi analytics, and digital asset tracking.

Build scalable microservices with NestJS and gRPC, and design APIs used by developers, trading platforms, and financial institutions.

Manage streaming pipelines with Kafka to process high-throughput event data from blockchains and financial markets.

Implement WebSocket-based services using Bun to push live updates (price feeds, wallet events, smart contract logs).

Store and optimize time-series data using QuestDB for hot access and ClickHouse for long-term analytics and compliance reporting.

Secure and orchestrate APIs through APISIX, with features like rate limiting, authentication, and request transformation.

Contribute to infrastructure scalability, observability, and resilience in a mission-critical, high-uptime environment.

Collaborate with smart contract developers, frontend engineers, and data scientists to ship features end-to-end.


The Tech Stack

You'll be working with bleeding-edge tools purpose-built for real-time finance:

NestJS - Modular TypeScript backend framework

gRPC + Protobuf - Blazing fast internal service communication

Kafka - Event streaming for blockchain and financial data ingestion

Bun - Ultra-fast runtime for high-frequency WebSocket communication

QuestDB - Low-latency time-series database for recent data

ClickHouse - Scalable analytics database for long-term storage

APISIX - Cloud-native API Gateway


What We're Looking For

5+ years in backend engineering, ideally with a focus on financial systems or high-throughput platforms

Strong proficiency in TypeScript, Node.js, and frameworks like NestJS

Experience with event-driven architecture and tools like Kafka

Comfort working with gRPC, Protocol Buffers, and microservices

Knowledge of blockchain fundamentals, smart contracts, or Web3 APIs (e.g., Ethers.js, Web3.js) is a big plus

Solid experience with WebSockets and real-time messaging systems

Proven ability to design and optimize time-series data solutions

Familiarity with cloud-native infrastructure (Docker, Kubernetes, CI/CD pipelines)

Security-first mindset - especially around financial and cryptographic systems

Self-starter attitude, with the ability to thrive in a fast-moving startup environment


What They Offer

Top-of-market salary + possible equity + crypto bonuses

Remote-first, async-friendly culture with flexible hours

The chance to work on the cutting edge of finance and Web3

A technical leadership role with influence over architecture and roadmap

Collaborative, transparent team culture with real ownership


Join the Future of Finance

If you're passionate about building real-time, decentralized financial infrastructure with an elite engineering team, we'd love to meet you.

Apply