{"schemaVersion":"jobsearcher.job.v1","id":"bcdd639dd3f58ef769fd0fab","url":"https://jobsearcher.com/jobs/bcdd639dd3f58ef769fd0fab","canonicalUrl":"https://jobsearcher.com/jobs/bcdd639dd3f58ef769fd0fab","title":"Senior Java Developer","description":"Job Information\nDate Opened\n07/22/2026\nJob Type\nContract\nIndustry\nAirline - Aviation\nWork Experience\n10 + years\nSalary\nDOE\nCity\nChicago\nState/Province\nIllinois\nCountry\nUnited States\nZip/Postal Code\n60601\nAbout Us\nAt Appex Innovations, we believe in the power of technology to transform healthcare, we believe in being nimble and in continual innovation, we believe that every customer is unique and we believe in listening to our clients. With our deep expertise in the health care domain, solid resource base, constant industry interface and the drive to be the best in the industry, we strive to provide services that re-define health care in the years to come. The secret to our success is Appex Innovations commitment to our people and our work. We thrive on teamwork, intelligence, and innovation. Our bright and energetic employees, hailing from over different parts of the world, share a passion for leading the way to improved healthcare outcomes. Together we work diligently to add value to our clients.\n\nJob Description\nWe are hiring a Java Developer - Senior with our client in Chicago, IL for a hybrid role.\n\nJob Details:\nRole: Java Developer (Senior)\n\nLocation: Chicago, IL - hybrid\n\nKey Areas: AI-DLC\n\nSenior Developer - Notifications Platform & AI Engineering\n\nDescription - External\n\nDomain: Airlines.\n\nExperience: 12+ YOE\n\nEligibility: USC, GC,L2S, EADs\n\nType: Contract-W2/ FTE\n\nSummary:\nUnited's Digital Technology team designs, develops, and maintains massively scaling technology solutions brought to life with innovative architectures, data analytics, digital solutions, and practical AI-enabled capabilities.\n\nThe Notifications team enables enterprise communication capabilities supporting customer and crew portfolios. This contractor role will focus on hands-on design, development, modernization, and production delivery of notification platform services, integrations, event-driven capabilities, and AI-enabled communication use cases.\n\nKey Responsibilities:\n\nThe role of Senior Developer will have a technical focus on enabling Notifications at the enterprise level and supporting a robust communication platform for customer and crew portfolios. This is a hands-on senior individual contributor role. This is not a management role. The expectation is to actively design, code, debug, optimize, deploy, and support production-grade solutions.\n\nDesign AND implement core services for the enterprise Notifications platform, including APIs, event-driven integrations, orchestration components, templates, and platform capabilities.\n\nWrite, review, debug, and optimize production code actively; lead through hands-on engineering contribution rather than delegation.\n\nBuild cloud-native backend services using Java, Spring Boot, Apache Camel, microservices, container technologies, and AWS services.\n\nDevelop and integrate AI/GenAI capabilities hands-on, including prompt design, LLM integration, RAG pipelines, embeddings/vector search, semantic search, classification, summarization, and AI-assisted communication workflows.\n\nPrototype, validate, and productionize AI-enabled features while considering latency, accuracy, cost, monitoring, fallback design, and operational reliability.\n\nDesign solutions for high availability, scalability, resiliency, observability, performance, security, privacy, and compliance needs.\n\nSupport integrations with internal enterprise systems, eventing platforms, data providers, communication providers, and vendor-managed services as needed.\n\nTroubleshoot and resolve complex production issues directly, including performance bottlenecks, integration failures, data issues, and system reliability concerns.\n\nWork closely with architects, product owners, business stakeholders, development teams, and vendor teams to convert requirements into working solutions.\n\nContribute to technical design, system documentation, code reviews, automated testing, CI/CD pipelines, release readiness, and production support practices.\n\nEnsure solutions are aligned with enterprise engineering standards, security expectations, and application lifecycle best practices.\n\nMentor developers through code-level guidance, design reviews, and engineering best practices; however, the primary expectation remains hands-on delivery.\n\nQualifications - External\n\nWhat is needed to succeed (Minimum Qualifications):\n\nBachelor's degree in Computer Science, Information Systems, Engineering, related field, or equivalent work experience required.\n\nMinimum 8 years of overall experience in software engineering, application development, integration, and SDLC delivery.\n\nStrong recent hands-on software development experience; candidate must be comfortable spending majority of time coding, debugging, designing, and delivering working software.\n\nMinimum 8 years of hands-on Java backend development experience, including Spring Boot, REST APIs, microservices, and open-source technologies.\n\nMinimum 3 years of hands-on experience with event-driven systems, messaging, streaming, integration, or notification platform capabilities.\n\nHands-on experience with Apache Camel or equivalent enterprise integration frameworks.\n\nMinimum 4 years of hands-on experience with AWS or equivalent cloud services such as EC2, S3, RDS, VPC, CloudFront, Lambda, EKS, ECS, API Gateway, DynamoDB, DocumentDB, AmazonMQ, or related services.\n\nStrong hands-on AI/GenAI implementation experience in enterprise or production-grade applications; AI experience should not be limited to strategy, vendor discussions, or conceptual understanding.\n\nPractical experience involves personally implementing one or more AI capabilities such as LLM integration, prompt engineering, RAG, embeddings/vector search, semantic search, classification, summarization, AI-assisted workflow automation, or decision-support capabilities.\n\nUnderstanding responsible AI and secure AI engineering practices, including data privacy, access control, guardrails, evaluation, monitoring, hallucination risk, human review where needed, and auditability.\n\nExperience with observability and analytics tools such as Dynatrace, ELK Stack, CloudWatch, or equivalent tools.\n\nExperience working in agile delivery environments where CI/CD, automated testing, code quality, deployment readiness, and production support are critical.\n\nDemonstrated knowledge of software engineering best practices such as version control, software packaging, release management, automated testing, secure coding, and operational readiness.\n\nStrong analytical and problem-solving skills with ability to diagnose complex technical issues independently.\n\nMust be self-motivated, collaborative, and able to communicate effectively with technical and non-technical stakeholders.\n\nWhat will help you propel from the pack (Preferred Qualifications):\n\nExperience designing and developing enterprise notification, communication, customer messaging, content management, or eventing platform solutions.\n\nExperience with Twilio or similar communication/messaging platforms.\n\nExperience applying AI to communication use cases such as personalization, routing, prioritization, content quality checks, template assistance, intent classification, summarization, or operational anomaly detection.\n\nExperience with AI observability, LLMOps/MLOps practices, model/prompt evaluation, AI guardrails, and production monitoring of AI-enabled features.\n\nAWS certification or equivalent cloud certification.\n\nExperience in high-scale, 24x7 production environments.\n\nAirline, travel, customer platforms, or crew operations domain experience.\n\nCandidate Profile Guidance for Vendors:\n\nSubmit candidates with strong hands-on individual contributor experience, not primarily people management profiles.\n\nCandidate should show recent coding and production delivery experience in Java/backend/cloud systems.\n\nCandidate should have real implementation experience in AI/GenAI capabilities, not only AI awareness, training, governance, or tool evaluation experience.\n\nProfiles that are architecture-only, governance-heavy, or delivery-management focused without recent hands-on coding will not be a fit.\n\nRole Type:\n\nSenior hands-on individual contributor role within the Notifications platform team.\n\nPrimary focus is hands-on engineering delivery, production support, and AI-enabled platform implementation.","company":"Appex Innovation","rawCompany":"appex innovation","city":"Chicago","state":"IL","isRemote":false,"isActive":false,"createdAt":"2026-08-03T23:33:10.137Z","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":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"},{"code":"513210","title":"Software Publishers","slug":"software-publishers"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Senior Java Developer","description":"Job Information\nDate Opened\n07/22/2026\nJob Type\nContract\nIndustry\nAirline - Aviation\nWork Experience\n10 + years\nSalary\nDOE\nCity\nChicago\nState/Province\nIllinois\nCountry\nUnited States\nZip/Postal Code\n60601\nAbout Us\nAt Appex Innovations, we believe in the power of technology to transform healthcare, we believe in being nimble and in continual innovation, we believe that every customer is unique and we believe in listening to our clients. With our deep expertise in the health care domain, solid resource base, constant industry interface and the drive to be the best in the industry, we strive to provide services that re-define health care in the years to come. The secret to our success is Appex Innovations commitment to our people and our work. We thrive on teamwork, intelligence, and innovation. Our bright and energetic employees, hailing from over different parts of the world, share a passion for leading the way to improved healthcare outcomes. Together we work diligently to add value to our clients.\n\nJob Description\nWe are hiring a Java Developer - Senior with our client in Chicago, IL for a hybrid role.\n\nJob Details:\nRole: Java Developer (Senior)\n\nLocation: Chicago, IL - hybrid\n\nKey Areas: AI-DLC\n\nSenior Developer - Notifications Platform & AI Engineering\n\nDescription - External\n\nDomain: Airlines.\n\nExperience: 12+ YOE\n\nEligibility: USC, GC,L2S, EADs\n\nType: Contract-W2/ FTE\n\nSummary:\nUnited's Digital Technology team designs, develops, and maintains massively scaling technology solutions brought to life with innovative architectures, data analytics, digital solutions, and practical AI-enabled capabilities.\n\nThe Notifications team enables enterprise communication capabilities supporting customer and crew portfolios. This contractor role will focus on hands-on design, development, modernization, and production delivery of notification platform services, integrations, event-driven capabilities, and AI-enabled communication use cases.\n\nKey Responsibilities:\n\nThe role of Senior Developer will have a technical focus on enabling Notifications at the enterprise level and supporting a robust communication platform for customer and crew portfolios. This is a hands-on senior individual contributor role. This is not a management role. The expectation is to actively design, code, debug, optimize, deploy, and support production-grade solutions.\n\nDesign AND implement core services for the enterprise Notifications platform, including APIs, event-driven integrations, orchestration components, templates, and platform capabilities.\n\nWrite, review, debug, and optimize production code actively; lead through hands-on engineering contribution rather than delegation.\n\nBuild cloud-native backend services using Java, Spring Boot, Apache Camel, microservices, container technologies, and AWS services.\n\nDevelop and integrate AI/GenAI capabilities hands-on, including prompt design, LLM integration, RAG pipelines, embeddings/vector search, semantic search, classification, summarization, and AI-assisted communication workflows.\n\nPrototype, validate, and productionize AI-enabled features while considering latency, accuracy, cost, monitoring, fallback design, and operational reliability.\n\nDesign solutions for high availability, scalability, resiliency, observability, performance, security, privacy, and compliance needs.\n\nSupport integrations with internal enterprise systems, eventing platforms, data providers, communication providers, and vendor-managed services as needed.\n\nTroubleshoot and resolve complex production issues directly, including performance bottlenecks, integration failures, data issues, and system reliability concerns.\n\nWork closely with architects, product owners, business stakeholders, development teams, and vendor teams to convert requirements into working solutions.\n\nContribute to technical design, system documentation, code reviews, automated testing, CI/CD pipelines, release readiness, and production support practices.\n\nEnsure solutions are aligned with enterprise engineering standards, security expectations, and application lifecycle best practices.\n\nMentor developers through code-level guidance, design reviews, and engineering best practices; however, the primary expectation remains hands-on delivery.\n\nQualifications - External\n\nWhat is needed to succeed (Minimum Qualifications):\n\nBachelor's degree in Computer Science, Information Systems, Engineering, related field, or equivalent work experience required.\n\nMinimum 8 years of overall experience in software engineering, application development, integration, and SDLC delivery.\n\nStrong recent hands-on software development experience; candidate must be comfortable spending majority of time coding, debugging, designing, and delivering working software.\n\nMinimum 8 years of hands-on Java backend development experience, including Spring Boot, REST APIs, microservices, and open-source technologies.\n\nMinimum 3 years of hands-on experience with event-driven systems, messaging, streaming, integration, or notification platform capabilities.\n\nHands-on experience with Apache Camel or equivalent enterprise integration frameworks.\n\nMinimum 4 years of hands-on experience with AWS or equivalent cloud services such as EC2, S3, RDS, VPC, CloudFront, Lambda, EKS, ECS, API Gateway, DynamoDB, DocumentDB, AmazonMQ, or related services.\n\nStrong hands-on AI/GenAI implementation experience in enterprise or production-grade applications; AI experience should not be limited to strategy, vendor discussions, or conceptual understanding.\n\nPractical experience involves personally implementing one or more AI capabilities such as LLM integration, prompt engineering, RAG, embeddings/vector search, semantic search, classification, summarization, AI-assisted workflow automation, or decision-support capabilities.\n\nUnderstanding responsible AI and secure AI engineering practices, including data privacy, access control, guardrails, evaluation, monitoring, hallucination risk, human review where needed, and auditability.\n\nExperience with observability and analytics tools such as Dynatrace, ELK Stack, CloudWatch, or equivalent tools.\n\nExperience working in agile delivery environments where CI/CD, automated testing, code quality, deployment readiness, and production support are critical.\n\nDemonstrated knowledge of software engineering best practices such as version control, software packaging, release management, automated testing, secure coding, and operational readiness.\n\nStrong analytical and problem-solving skills with ability to diagnose complex technical issues independently.\n\nMust be self-motivated, collaborative, and able to communicate effectively with technical and non-technical stakeholders.\n\nWhat will help you propel from the pack (Preferred Qualifications):\n\nExperience designing and developing enterprise notification, communication, customer messaging, content management, or eventing platform solutions.\n\nExperience with Twilio or similar communication/messaging platforms.\n\nExperience applying AI to communication use cases such as personalization, routing, prioritization, content quality checks, template assistance, intent classification, summarization, or operational anomaly detection.\n\nExperience with AI observability, LLMOps/MLOps practices, model/prompt evaluation, AI guardrails, and production monitoring of AI-enabled features.\n\nAWS certification or equivalent cloud certification.\n\nExperience in high-scale, 24x7 production environments.\n\nAirline, travel, customer platforms, or crew operations domain experience.\n\nCandidate Profile Guidance for Vendors:\n\nSubmit candidates with strong hands-on individual contributor experience, not primarily people management profiles.\n\nCandidate should show recent coding and production delivery experience in Java/backend/cloud systems.\n\nCandidate should have real implementation experience in AI/GenAI capabilities, not only AI awareness, training, governance, or tool evaluation experience.\n\nProfiles that are architecture-only, governance-heavy, or delivery-management focused without recent hands-on coding will not be a fit.\n\nRole Type:\n\nSenior hands-on individual contributor role within the Notifications platform team.\n\nPrimary focus is hands-on engineering delivery, production support, and AI-enabled platform implementation.","datePosted":"2026-08-03T23:33:10.137Z","dateModified":"2026-08-03T23:33:10.137Z","hiringOrganization":{"@type":"Organization","name":"Appex Innovation","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Chicago","addressRegion":"IL","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"bcdd639dd3f58ef769fd0fab"},"url":"https://jobsearcher.com/jobs/bcdd639dd3f58ef769fd0fab"}}