{"schemaVersion":"jobsearcher.job.v1","id":"2fda2efb047b5ede87087b2d","url":"https://jobsearcher.com/jobs/2fda2efb047b5ede87087b2d","canonicalUrl":"https://jobsearcher.com/jobs/2fda2efb047b5ede87087b2d","title":"Senior Software Engineer (Java)","description":"Senior/Staff Java Engineer — Electronic Trading PlatformA well-funded fintech is building the infrastructure that loans and CLO markets have never had. Trillions of dollars in these markets still move through phones, emails, and PDFs. This team is replacing that with real-time, AI-driven trading infrastructure — and they need serious backend engineers to build it.The roleYou'll be deep in the core of a proprietary electronic trading platform: high-throughput, low-latency systems handling real-time market data and trade execution. This isn't CRUD work — it's distributed systems, concurrency, and performance engineering applied to a market that's never had modern infrastructure. NYC-based (Manhattan), 4 days in-office, Friday remote.What you'll actually buildCore trading engine components — order management, matching logic, real-time pricingHigh-throughput, low-latency services processing live market dataMultithreaded, concurrent systems where correctness and performance both matterBackend architecture as the platform transitions fully in-houseData pipelines and APIs that product and quant teams build on top ofWhat we need8+ years building production Java systems — this is a Java shop, not a \"Java is fine\" shopDeep multithreading and concurrency chops — real experience with concurrent data structures, lock-free patterns, thread pool design, not just textbook knowledgeStrong CS fundamentals — data structures, algorithms, distributed systemsRelational databases and SQL at a level where you're optimizing queries, not just writing themExperience building and scaling cloud-based backend systemsBonus: experience in trading systems, market data infrastructure, or other latency-sensitive domains (fintech, ad-tech, gaming backend, HFT)Bachelor's in CS, engineering, or related fieldComp$180,000–$200,000 base, plus equity and year-end bonus. Full medical/financial benefits, 90% company-paid healthcare, flexible PTO, daily breakfast/coffee/snacks, onsite gym.Equal opportunity employer — does not discriminate on the basis of race, national origin, gender, gender identity, sexual orientation, protected veteran status, disability, age, or other legally protected status.","company":"Lastellar Group","rawCompany":"lastellar group","city":"New York","state":"NY","isRemote":false,"isActive":false,"createdAt":"2026-09-21T07:28:49.952Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"15-1299.08","title":"Computer Systems Engineers/Architects","slug":"computer-systems-engineers-architects"},{"code":"15-1251.00","title":"Computer Programmers","slug":"computer-programmers"}],"industries":[{"code":"513210","title":"Software Publishers","slug":"software-publishers"},{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"522320","title":"Financial Transactions Processing, Reserve, and Clearinghouse Activities","slug":"financial-transactions-processing-reserve-and-clearinghouse-activities"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Senior Software Engineer (Java)","description":"Senior/Staff Java Engineer — Electronic Trading PlatformA well-funded fintech is building the infrastructure that loans and CLO markets have never had. Trillions of dollars in these markets still move through phones, emails, and PDFs. This team is replacing that with real-time, AI-driven trading infrastructure — and they need serious backend engineers to build it.The roleYou'll be deep in the core of a proprietary electronic trading platform: high-throughput, low-latency systems handling real-time market data and trade execution. This isn't CRUD work — it's distributed systems, concurrency, and performance engineering applied to a market that's never had modern infrastructure. NYC-based (Manhattan), 4 days in-office, Friday remote.What you'll actually buildCore trading engine components — order management, matching logic, real-time pricingHigh-throughput, low-latency services processing live market dataMultithreaded, concurrent systems where correctness and performance both matterBackend architecture as the platform transitions fully in-houseData pipelines and APIs that product and quant teams build on top ofWhat we need8+ years building production Java systems — this is a Java shop, not a \"Java is fine\" shopDeep multithreading and concurrency chops — real experience with concurrent data structures, lock-free patterns, thread pool design, not just textbook knowledgeStrong CS fundamentals — data structures, algorithms, distributed systemsRelational databases and SQL at a level where you're optimizing queries, not just writing themExperience building and scaling cloud-based backend systemsBonus: experience in trading systems, market data infrastructure, or other latency-sensitive domains (fintech, ad-tech, gaming backend, HFT)Bachelor's in CS, engineering, or related fieldComp$180,000–$200,000 base, plus equity and year-end bonus. Full medical/financial benefits, 90% company-paid healthcare, flexible PTO, daily breakfast/coffee/snacks, onsite gym.Equal opportunity employer — does not discriminate on the basis of race, national origin, gender, gender identity, sexual orientation, protected veteran status, disability, age, or other legally protected status.","datePosted":"2026-09-21T07:28:49.952Z","dateModified":"2026-09-21T07:28:49.952Z","hiringOrganization":{"@type":"Organization","name":"Lastellar Group","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"New York","addressRegion":"NY","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"2fda2efb047b5ede87087b2d"},"url":"https://jobsearcher.com/jobs/2fda2efb047b5ede87087b2d"}}