Top Application Engineer Jobs in Chicago, IL

Build fault-tolerant, self-healing infrastructure and internal tooling for a brokerage platform. Expand observability using Prometheus, Honeycomb, OpenTelemetry, and Grafana; scale HashiCorp Nomad services through capacity planning and load testing; establish SLOs, error budgets, and alerting; analyze Linux and networking performance; support production on-call operations; and mentor engineers in site reliability practices.

Leads configuration, optimization, administration, and architecture of Old National Bank’s Abrigo financial risk and lending platforms. Manages workflows, decisioning rules, integrations, data mappings, upgrades, testing, reporting, and production environments. Partners with banking, credit, and compliance stakeholders to translate requirements into technical solutions, supports BSA/AML functionality, troubleshoots issues, manages vendor relationships, and mentors configuration analysts.

Designs, builds, deploys, and supports full-stack enterprise applications using Databricks and Azure. Develops user interfaces, backend logic, APIs, workflows, secure write-back, reporting, forecasting, planning, and operational tools. Integrates enterprise platforms including SAP, Salesforce, and Power BI. Partners with business, data, and analytics teams, supports production applications, and establishes delivery standards while coordinating offshore development resources.

Serve as the primary pre-sales technical partner for manufacturing customers. Lead discovery, requirements gathering, production-data and CAD analysis, robotic automation solution design, scoping, cost estimation, proposal support, customer design reviews, and handoffs to deployment. Manage multiple technical workstreams, improve standard designs and procedures, identify offering gaps, and visit customer sites for discovery and validation. Expertise in palletizing or case packing and major six-axis robot platforms is preferred.

Develop and maintain Salesforce applications across the web stack, including front end, back end, APIs, databases, and data pipelines. Write and review technical documentation, code, and unit tests; support builds and deployments; troubleshoot issues; and collaborate with engineering teams, TPMs, and business stakeholders. Apply Agile practices, manage delivery expectations, integrate Salesforce with business applications, and support scalable, high-quality software solutions.

Designs and scales high-performance backend web services and ETL pipelines supporting tens of thousands of transactions per second. Responsibilities include architecting fault-tolerant distributed systems, improving performance, developing monitoring and deployment strategies, collaborating across product and engineering teams, and supporting recruiting and onboarding. The role requires expertise in data-intensive systems, microservices, cloud architectures, and commercial SaaS products.

Leads the architecture, requirements, validation, and integration of complex railroad solutions, especially autonomous train operations and automated yard management. Translates railroad operating practices and train-handling expertise into software requirements, safety protocols, simulations, and solution-level test plans. Supports RFPs, field testing, regulatory compliance, technical risk mitigation, and cross-functional issue resolution while serving as a technical bridge between railroad experts, engineering teams, customers, and management.

Develop and architect software applications for complex intelligence-sector challenges. Responsibilities include designing collaborative solutions, developing with Node.js and TypeScript, working with databases and search technologies, and using automated testing tools for testing and maintenance. The role requires 6+ years of application or software development experience, a bachelor’s degree, and TS/SCI clearance with polygraph.

Reviews cooling-system drawings and submittals for equipment selection, capacity, and hydronic configuration accuracy. Collaborates with customer and consulting engineers, supports estimating with technical proposal input, and provides engineering assistance to project managers and customers throughout installation and startup. Resolves technical questions, drawing conflicts, RFIs, and submittals, while feeding field experience into research and product development. The role focuses on data center cooling systems, including chillers, CDUs, and liquid cooling for AI and hyperscale deployments.

Develop and architect large-scale enterprise applications as part of an agile full-stack team. Design cloud-native architectures, microservices, APIs, data platforms, and responsive front-end applications. Analyze business and technical challenges, translate stakeholder needs into technical roadmaps, and support modernization initiatives. Collaborate on solution design, coding, reviews, testing, documentation, demonstrations, and production issue resolution while championing secure, scalable, maintainable engineering practices.

Develop, maintain, and test enterprise web applications using ASP.NET and Microsoft SQL Server. Design relational databases and T-SQL queries, write front-end HTML/CSS/JavaScript, collaborate with teams, and support full project lifecycle and existing websites.

Front-end Web Application Developer for a large bank near Downers Grove/Oakbrook. Must be strong in JavaScript and experienced with responsive HTML5 and CSS. Role involves programming and testing in JavaScript, onsite work with some remote flexibility, and training on Avoka web forms. Java and .NET skills are a plus. No sponsorship or corp-to-corp; salary $80K–$100K.

Designs, develops, tests, debugs, documents, and maintains platform-independent GUI applications for audio products and networking technologies. Collaborates with business, marketing, testing, and systems engineering stakeholders to define requirements and use cases. Develops applications using TypeScript and Angular, researches development technologies, supports software architecture, estimates and documents tasks, and contributes to agile development, continuous integration, and continuous testing processes.

Design, develop, test, deploy, and maintain enterprise GIS web and desktop applications throughout the software development lifecycle. Collaborate with clients and Agile teams to define requirements, make architectural decisions, write tested and documented code, conduct code reviews, troubleshoot defects and performance issues, and support production environments. The role requires modern frontend, backend, database, testing, version control, and CI/CD skills, with preferred experience in desktop applications, legacy systems, containers, security remediation, and AI/ML integration.

Develop, test, and deploy infrastructure-management software across Linux and Windows environments. Design infrastructure services architecture, automation modules, deployment orchestration, containerized application deployments, and CI/CD test frameworks. Configure application servers, load balancers, proxies, networks, and VPCs. Troubleshoot production and container issues, support operations teams, coach engineers, establish configuration-management standards, and participate in code and design reviews.

The Lead Application Engineer drives business strategy with technical expertise in the Inquiry to Order phase, ensuring high-quality proposals and technical accuracy for electrical projects while mentoring team members.

Deploys, hardens, troubleshoots, and modernizes Windows and .NET applications across on-premises environments and AWS. Responsibilities include Terraform infrastructure, CI/CD pipelines, SQL Server and Amazon RDS administration, load balancing, WAF configuration, observability, certificate management, automation, migrations, incident response, documentation, and collaboration with application owners. The role is remote but requires weekly onsite availability in Rockville, Maryland, and may involve occasional after-hours maintenance or outage troubleshooting.

Develops and supports software applications. The posting requires U.S. citizenship or naturalized citizenship and mandates that all work be performed within the continental United States, Alaska, or Hawaii.

Build fault-tolerant, self-healing infrastructure and tooling; improve observability, telemetry, logging, and alerting; scale a HashiCorp Nomad service fabric; perform capacity planning and load testing; establish SLOs and error budgets; support production systems and mentor engineers in site reliability practices.

Develop, test, and validate application software and HMI for mobile/off-highway electronic control systems. Provide hardware/software support, create reusable function blocks, implement functionally safe software, simulate and test in lab or vehicle, and support customers onsite alongside sales.

Develop and maintain native iOS and Android applications for streaming experiences. Collaborate on TV platforms, establish architecture, and utilize AI tools to enhance productivity.

Remote Mendix low-code developer to design, configure, and implement Mendix applications (microflows, nanoflows, domain models, UI, integrations). Support requirements gathering, process analysis, UAT, QA, defect resolution, and Agile/Scrum delivery for an Arizona state agency. Coordinate with stakeholders and maintain project documentation.

ClaimsXM Application Developer role. Specific responsibilities not provided. Job requires U.S. citizenship, work to be performed within the United States, and offers $100,000$120,000/year.

Design, build, operate, and troubleshoot distributed cloud, IoT, API, event-driven, web, and device-edge systems. Own complex technical problems from discovery through production, make architecture decisions, mentor engineers, conduct code and design reviews, and collaborate across product, QA, firmware, security, and operations. Improve system observability, reliability, security, performance, cost, deployment practices, and engineering processes while communicating trade-offs to technical and non-technical stakeholders.

Senior application developer responsible for designing and implementing solutions for intelligence-sector systems. Develop with Node.js/TypeScript and databases (PostgreSQL, Redis, Elasticsearch), write and maintain automated tests, collaborate cross-functionally, and meet TS/SCI with polygraph clearance requirements.