JVM Bytecode Engineer (full remote)

We're building technology that automatically parallelizes Java applications by transforming bytecode post-compilation. Our proof of concept already shows a 2.8x speedup on real workloads without requiring source code changes. Now, we're looking for a brilliant JVM engineer to help turn this into a game-changing product.

For a deep dive into our current approach and early results, check out our recent technical blog post showing 2.8x speedup through automatic bytecode parallelization or here (for a really deep dive).

The Role

You'll work directly with our founding team to evolve our automatic parallelization engine from proof-of-concept to production-ready system. You'll dive deep into bytecode manipulation, control flow analysis, and concurrent execution patterns while helping shape our product strategy.

The Challenge

Transform our working prototype into a robust, production-grade system
Extend parallelization capabilities to handle complex scenarios (branching, object references, exceptions)
Design and implement sophisticated program analysis techniques
Build tooling to make parallel execution safe and efficient across diverse codebases
Help shape our product roadmap based on real-world use cases

What You Bring

Must Have

Comfort with startup "lifestyle" (high expectation, high pressure, uncertainty, instability but a career defining opportunity if it works out)
Deep understanding of JVM internals and bytecode manipulation
Strong grasp of Java concurrency and thread safety principles
Experience with control flow analysis and program transformation
Solid background in parallel computing concepts
Excellent problem-solving skills and attention to detail
Strong written communication skills for remote collaboration
Comfort with ambiguity and rapid iteration

Nice to Have

Experience with BCEL or similar bytecode manipulation libraries
Background in building developer tools or performance optimization systems
Familiarity with static analysis techniques
Experience turning prototypes into production systems
Previous remote work experience
Startup experience

Why Join Us

The Opportunity

Work on cutting-edge technology that could revolutionize software performance
Shape the direction of a foundational product from its early stages
Join as an early engineer with significant equity upside
Learn and grow rapidly in a fast-paced environment
Work remotely with a focused, talented team

Benefits (US-based)

Comprehensive health insurance
401(k) plan
FSA availability
Remote work setup
Regular team on-site for collaboration

Our Work Style

Fully remote with quarterly in-person team meetings
High autonomy and ownership
Direct communication and rapid feedback
Focus on impact over process
Learn and adapt quickly

About Us

We're InboxBooster, an early-stage startup that began by solving critical email deliverability problems - helping companies stay out of spam folders. While building our email platform, we discovered an opportunity to dramatically improve software performance through automatic parallelization.

This new direction emerged from our hands-on experience with high-performance systems. Our proof of concept already shows dramatic speedups on real workloads, and we're now building out a dedicated team to turn this into a transformative product.

We believe computation is a cornerstone of modern society, and making it more efficient can have a massive impact. We're looking for engineers who are excited by both the technical challenge and the opportunity to shape a new direction.

Next Steps

If you're excited about pushing the boundaries of software performance and want to join an early-stage startup with massive potential impact, we'd love to talk. Send us: