Hire pre-vetted Java engineers
Discover top Java developers, engineers and consultants in your preferred time zone.
See hundreds of profiles, watch videos of candidates’ coding challenges, and hire confidently with a two-week, risk-free trial today.
Elite Java talent, ready to start in as little as 48 hours
You have projects to create, features to ship, and promises to keep. Yet as your backlog grows, your recruitment process has ground to a halt.
Traditional hiring is often a struggle.
- Time-to-hire: In today’s market, the average time to fill a senior tech role is 47 days. That’s nearly two months of lagging development while you wait for talent.
- Screening overhead: Your senior engineers (or you) could be spending up to 20% of their week reviewing unqualified resumes and sitting in technical interviews instead of coding.
- Retention issues: You might hire a new team member and spend three months onboarding them, only to discover they aren't a culture fit. You’re back to square one, but now you’re thousands of dollars and months of progress behind.
FullStack makes working with global, pre-vetted talent easy so you can focus on what matters most.
- Agile, flexible team augmentation: Scale your team up or down without long-term commitments. Our top talent can start on your project in an average of 2-4 weeks—and in some cases, as quickly as 48 hours. Plus, our month-to-month contracts make pivoting a breeze.
- Rigorous vetting: Every engineer in our network has passed our technical challenges, logic assessments, and English proficiency tests before their profile is available to hire.
- Built-in transparency: Review full work histories and portfolios, and watch real interviews and live coding challenges before you hire.
- AI-enabled talent: Our engineers combine decades of hard-earned expertise with the latest AI
technology to build products time that work right from day one—and for the long haul.
Your senior Java engineer is already vetted and waiting
Rigorous vetting: Every engineer passes technical challenges, logic assessments, and English proficiency tests before they ever see your profile.
Plug & play integration: Our developers don't work in a silo. They adopt your tools (Jira, Slack, GitHub), attend your stand-ups, and integrate into your culture from day one.
Total flexibility: Need a Java expert for six months? A Ruby team for a year? Scale your team up or down based on your project needs, not HR constraints.
Define your needs.
Book a brief 15-minute call with our team. We’ll discuss your project requirements, technical stack, and team culture to ensure we know exactly who you need.
Match with the best talent.
Receive a curated shortlist of pre-vetted candidates ready to hit the ground running. Review their coding and interview videos, then select candidates to interview with a click—or explore our network yourself via our Connect portal.
Schedule their start date.
Interview your top choices and select your favorite. We handle the contracts, compliance, and payroll so they can start contributing to your codebase immediately.
Enjoy your two-week, risk-free trial
Start working together instantly. If you aren't 100% satisfied with the developer’s performance in the first 14 days, you won’t pay a dime.
Real challenges. Senior talent. Proven results.
Don’t just take our word for it. See how we’ve helped high-growth teams clear their backlogs and ship products to market in record time.
Projects Delivered
Engineers in Our Network
Build 3x faster with AI-enabled Java engineers.
FullStack deploys AI-certified developers trained in today’s leading AI tools and frameworks. Our talent delivers faster builds, lower rework, and measurable cost savings without sacrificing engineering rigor or human oversight.
Move from idea to production faster, with clean code, strong QA, and experienced engineering judgment built in.
The business impact of AI-native Java talent
When AI is embedded across the development workflow, results are immediate and measurable:
3× Faster Launches
AI-assisted planning, coding, and QA compress timelines without increasing risk.
50% Typical Cost Savings
Deliver more with fewer resources, reducing rework and overhead.
Future-Proof Builds
Clean architecture, thorough documentation, and systems designed to evolve.
Human-Backed Confidence
Every AI-assisted decision is reviewed, validated, and owned by experienced engineers.
Comprehensive Java capabilities
We provide seasoned engineers who have moved beyond legacy monoliths. From high-throughput microservices to memory-optimized JVM tuning, we build systems that keep steady.
Here are some of our engineers’ Java capabilities:
Core & Architecture
- Event-Driven Design: Decoupling services using Apache Kafka or RabbitMQ to ensure system resilience and scalability.
- Resilience Patterns: Implementation of Circuit Breakers (Resilience4j) and Rate Limiters to prevent cascading failures across microservices.
- Legacy Modernization: Proven experience strangling monoliths into maintainable, containerized microservices.
Modern Spring & Cloud Native
- Spring Boot 3: Rapid development of production-ready microservices with built-in observability, security, and configuration management.
- Reactive Systems: Building non-blocking, asynchronous applications using Spring WebFlux and Project Reactor.
- GraalVM & Native Image: Optimizing Java applications for lightning-fast startup times and reduced memory footprint in serverless environments.
Quality & Performance
- Virtual Threads (Loom): Leveraging the latest Java concurrency models to handle high-throughput I/O without the complexity of reactive code.
- JVM Internals: Expert tuning of Garbage Collection (G1GC, ZGC) and heap memory to eliminate latency spikes in critical applications.
- Data Access Optimization: Solving complex Hibernate performance bottlenecks (N+1 problems) and optimizing JPA entity graphs.
Projects from our clients
See how our developers integrate seamlessly to help clients hit their roadmaps—without the hiring headaches.
Logistics company achieves 4.8 App Store rating with new parcel management App
- A 4.8-star rating on the App Store, based on 30.7K ratings.
- Enhanced operational efficiency through seamless IoT integration
- Used React Native for cross-platform maintainability.
Uber Increases Productivity with Internal Search
- 70% Reduction in Search Steps
- 15 Minutes Saved Daily per Employee
- Unified Access Across 7 Platforms, including Google Drive, Confluence, Jira, Tugboat, and more.
Agentic AI transforms benefits enrollment for 3M+ users
- 15 weeks to launch The MVP.
- 3M+ users supported.
- 20M+ data points processed.
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