Software Engineer (Java Generalist) job opportunity at MLabs.

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Date2026-02-09T14:53:35.863Z bot
MLabs Software Engineer (Java Generalist)
Experience: 10-years
Pattern: full-time
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Software Engineer (Java Generalist) Location: US - Open to Europe if happy to overlap with EST Compensation: $160K - $200K Our firm has been retained by a high-growth, mission-driven technology company to find a world-class Principal Java Systems Engineer . This is not a role for "glue" engineers who connect off-the-shelf components; this is for the engineer who sees performance ceilings as a personal challenge and prefers squeezing 30% more throughput out of clean Java over renting 30% more cloud compute. Our client is building a high-performance, publicly visible immutable ledger. In an industry where people "move fast and break things," this team operates like NASA: moving fast while ensuring correctness, performance, and efficiency are 100% right the first time. You will join an elite team where you aren't a cog in the machine—you are the architect building it. Key Responsibilities: First-Principles Engineering: Invent new protocols, data structures, and algorithms to solve problems no one else has tackled. Low-Latency Systems: Design and write high-throughput Java systems from scratch, tuning memory down to the byte and performance to the nanosecond. Core Infrastructure: Build parsers, interpreters, and performance profilers from the ground up. Technical Leadership: Mentor senior and staff engineers while making architectural decisions that ensure the correctness of a global ledger. Optimization: Switch fluently between high-level system design and single-instruction-level optimization. Rigorous Testing: Build harnesses and tests to ensure mission-critical financial software never breaks. Experience: 10+ years of professional software development experience. JVM Mastery: Deep understanding of the JVM, including memory models, threading, GC behavior, and performance profiling. Systems Background: Experience with parsers, interpreters, compilers, or other language tooling. CS Fundamentals: Strong grasp of data structures, algorithms, concurrency, and high-performance code with minimal dependencies. Proven Delivery: Ability to deliver a high-performance server from scratch using just the JDK and an IDE. Tooling: Proficient with JMH, PBJ, async-profiler, JFR, YourKit, or similar performance tools. Education: Master’s degree in Computer Science or equivalent deep industry experience. Preferred Good-to-Have Skills: Experience in distributed systems or blockchain technology. Knowledge of cryptographic primitives (hashes, public/private keys). Familiarity with Web3 tools, smart contract platforms (EVM), or high-frequency trading (HFT) systems.

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