Senior Java Engineer: APIs & High-Performance Systems
Synechron
Synechron in Chicago is seeking a detail-oriented Java Software Engineer to design, develop, and execute high-quality code for scalable software applications. You will focus on APIs with core Java/Spring/Microservices, emphasize performance, and ensure robust unit tests and reliable design. The role requires JNI, NIO, and deep knowledge of multi-threading, data structures, and Linux internals. You will collaborate across teams, optimize code, and contribute to cutting-edge projects with top-tier #J-18808-Ljbffr Synechron
- Acquire Me is seeking a Senior Java Engineer in Chicago, Illinois, to join their Trading & Execution... ...building and optimising critical systems responsible for real-time trading... ...engineering, with deep expertise in high-performance Java systems and low-latency design....SeniorPerformance
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DRW is seeking a Senior Software Engineer to join our team in Chicago. This role focuses on developing and implementing trading applications... ...Candidates should have over 10 years of experience in high-availability systems, preferably in C++ or Rust. The position offers a...SeniorPerformance- Profile Sr Software Engineer - low latency Description This... ...efficiencies. Balances performance, capacity and reliability with core system functionalit y.... ...applications and systems for high throughput and low latenc... ...load Solar Flare extension API's prefer redDemonstrate...SeniorPerformanceInternship
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Adyen is seeking a Software Engineer in Chicago. You will work on complex technical projects, contributing from design to implementation... ...of software development experience and is proficient in Java, REST APIs, and SQL/PostgreSQL. A commitment to in-person collaboration...Senior$86.13k - $127.19k
...JD : We are seeking a highly skilled Senior Java Full Stack Engineer to design, develop, and maintain scalable, high-performance applications. The ideal candidate... ...and maintain RESTful APIs and microservices... ...architects Contribute to system design, architecture decisions...SeniorPerformanceLocal area$200k - $225k
...talented and experienced Senior Software Engineer to join our TAPE team. The... ...trade and positions system, delivering real‑time risk... ...Architect, develop, and maintain high‑performance, resilient Java services to power TAPE’s... ..., and enhance client APIs in Java, C++, and Python....SeniorPerformanceFull timeFor contractorsWorldwide$200k - $225k
...experienced software engineer to join our... ...trade and positions system, delivering real ‑time... ...architecture, high‑throughput processing... ...maintain resilient Java services to power... ...and enhance client APIs in Java, C++, and... ...to optimize system performance and reliability....SeniorPerformanceFor contractorsImmediate startWorldwide$79k - $138k
...mission is to deliver highly personalized risk... ...As a Senior Java Developer, you will... ...a hands‑on senior engineer responsible for designing... ...decisions, and improve performance, stability, and... ...understanding of interfacing systems and supported... ...REST and SOAP APIs Experience with...SeniorPerformanceFull timeWork at officeRemote workFlexible hours$190.8k - $267.1k
Reddit, Inc. is looking for a Senior Engineer to enhance their Core API Platform. You'll develop solutions that... ...junior engineers and ensuring high performance and uptime. The ideal candidate has... ...with large-scale distributed systems, excels in communication, and possesses...SeniorPerformance- ...Developer V to design and develop secure, mobile-optimized APIs optimized for high-performance applications. The role demands strong experience in... ...security best practices. As a developer, you will monitor system performance and collaborate with cross-functional teams....SeniorPerformance
- ...trading firm is seeking a Senior Java Engineer to join their Trading & Execution... ...group. This team owns the systems responsible for capturing,... ...depends on them. Their performance, reliability, and accuracy... ...where technical excellence is highly valued. What You'll Do...SeniorPerformanceImmediate start
- Senior Java Developer (AWS Serverless / GenAI / GitHub Copilot) Direct... ...services (Lambda, API Gateway, DynamoDB, S3, etc.)... ...functional teams to deliver secure, high‑performance applications. Integrate GenAI... ..., and refactor existing systems for performance and scalability...SeniorPerformanceContract work
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- ...MN/ Chicago,IL - Onsite role Senior, Lead Java developer opportunity... ...technical design of application systems. Develops and implements application... ...and beyond. The role is high touch position with a... ...applications system to achieve optimum performance levels and works with...SeniorPerformance
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- Insight Global is seeking a skilled Machine Learning Engineer based in Chicago, IL. In this role, you'll develop software... ...using machine learning for back end applications, including high-performance APIs and systems for training and evaluating ML models. You'll need at...SeniorPerformance
- Skill is seeking an experienced engineer to design and implement secure, scalable... ...full-stack capabilities, building high-performance applications that enhance system stability and efficiency on a... ...candidate has strong expertise in Java, multithreading, and automation testing...SeniorPerformance2 days per week
- ...provider is looking for an IT Software Engineer 5 to lead backend development for... .... This role involves using Java 17, mentoring teams, and ensuring high-performance backend solutions. Applicants should... ...in AWS services and RESTful API. This hybrid position offers competitive...SeniorPerformance
$140.6k - $183.11k
...solutions to support highly resilient real-time business... ...provide architecture, engineering and development... ...enabling reliable and secure API and Event-driven... ...security teams Measure performance against established KPIs... ...reliable messaging systems and API Gateways capable...SeniorPerformanceHourly pay$102k - $120k
...Summary We are seeking a highly skilled and experienced Senior Java Developer with 15+ Years... ...Hibernate, and Angular. Perform technical analysis, impact... ...enterprise‑level ticketing systems (ServiceNow, JIRA, HPPPM... ...and maintain RESTful APIs and microservices for integration...SeniorPerformanceFull timeTemporary workFlexible hours$82.08k - $193.44k
...Java Full Stack Senior Developer/Architect Choosing Capgemini... ...will design robust system architectures, drive... ...components, and ensure high performance, security, and... ...teams and mentoring engineering talent. Your Role... ...Kafka/RabbitMQ), and API design (REST/GraphQL...SeniorPerformancePermanent employmentFull timeContract workLocal area3 days per week- As a Lead Software Engineer at JPMorgan Chase within... ...Develops secure high-quality production... ...applications and systems Leads evaluation sessions... ...language(s) Java, Spring Boot, Microservices, Rest API, Kubernetes Proficiency... ...of firm performance and individual achievements...SeniorPerformance
$150k - $175k
...technology firm in Chicago is seeking a Senior Engineer to develop its high-throughput matching engine and clearing system. This role requires 5+ years of experience in building high-performance distributed systems, strong Java skills, and familiarity with networking protocols...SeniorPerformance- YO IT Consulting is seeking a Java Developer to design and implement backend systems in a remote capacity. You will leverage... ...This role focuses on clean code, performance, and secure backend design. The... ...specifications, and deliver high-quality code while documenting technical...PerformanceRemote job
$145k - $225k
Chicago Trading Company (CTC) is looking for a software developer to design and maintain high-performance trading systems and algorithms, utilizing languages such as C++, Python, and Java. This position requires a minimum of 4 years of experience in software development...SeniorPerformance$172k - $250k
...Senior Account Executive - API Platform Our healthcare system remains frustratingly analog. When you live... ...loop is short. Product, Engineering, and GTM leadership... ...location, experience, and performance. The range listed... ...~ Flexible PTO ~ High-impact work that directly...SeniorPerformanceLive inFlexible hours- A leading global exchange operator is seeking an experienced multimedia systems manager in Chicago, Illinois. The role involves managing high-performance multimedia environments, leading project discussions, and maintaining critical vendor relationships. Ideal candidates...SeniorPerformance
- ...Job Title: Senior Java Full Stack Developer Work Location:Chicago... ..., develop, and maintain REST APIs and microservices using... ...efficient integration between systems.Create responsive and userfriendly... ...components and optimize UI performance.Deploy, config Top...SeniorPerformanceContract work
$200k - $250k
Chicago Trading Company seeks a Software Engineer to design and build high-performance, low-latency trading systems for our Options Market Making business. The ideal candidate will have a minimum of 5 years of experience with modern C++, and deep knowledge of low-level...SeniorPerformance
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