Top Application Engineer Jobs in Los Angeles, CA

Build and operate secure, scalable full-stack applications supporting Finance, Manufacturing, Supply Chain, and Operations. Responsibilities include developing user interfaces, APIs, data models, integrations, automated tests, observability, and production support. The role partners with business and technical stakeholders, integrates ERP and manufacturing platforms, improves reliability and performance, and contributes to engineering standards, documentation, mentoring, and incident response.

Provides technical support and engineering solutions to aerospace customers developing polymer products. Responsibilities include troubleshooting, design reviews, engineering documentation, CAD-based product design, engineering change requests, customer demonstrations, supplier collaboration, and cross-functional coordination with R&D, manufacturing, and sales. The role requires a bachelor's degree, engineering experience, proficiency with CAD and engineering software, strong communication skills, and approximately 20% domestic and international travel.

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.

Develop and maintain the Timmy HR mobile application for iOS and Android. Implement UI workflows, integrate backend APIs and authentication, support employee features, fix bugs, test across devices, prepare app releases, and document technical changes while collaborating with design and backend teams.

Leads and mentors application engineers while designing Java and Spring Boot microservices. Oversees application modernization, VM-to-container migration, GCP and GKE deployments, Kubernetes troubleshooting, CI/CD, testing, database integration, observability, and distributed systems. Coordinates technical dependencies across a large application portfolio and collaborates with platform, DevOps, security, and architecture teams. Uses AI-assisted engineering tools to accelerate development, modernization, testing, documentation, and automation.

Design, develop, and architect enterprise applications using Microsoft Power Platform, including Power Apps, Power Automate, Power Pages, and Dataverse. Integrate enterprise data sources, build custom plugins and APIs, implement secure architectures, and establish ALM and deployment practices. Lead and mentor a team of developers, collaborate with stakeholders and technical teams, participate in Agile ceremonies, and present technical solutions.

Develop and maintain AmeriCorps grants management applications using Java, Oracle, PL/SQL, and SQL. Modernize systems, implement enhancements and interfaces, support security and privacy requirements, collaborate with stakeholders to capture and deliver requirements, and perform application testing and maintenance.

Develop and support low-code applications, dashboards, workflows, and integrations using Microsoft Power Platform and ServiceNow. Engage Coast Guard users during roadshows to gather requirements, create prototypes, and deliver MVP solutions. Translate business needs into technical designs, data models, user stories, and workflow logic; support testing, Agile delivery, troubleshooting, documentation, and production transition.

Provides technical leadership for semiconductor customer design enablement from engagement through tape-out readiness. Resolves complex engineering issues, coordinates solutions across PDK, modeling, IP, EDA, reliability, and customer teams, and improves design flows, automation, documentation, and support processes. Manages technical deliverables, risks, milestones, and recovery plans while leading design reviews, customer engagements, training, and knowledge sharing.

Designs, develops, tests, and supports enterprise web applications using .NET, Java, SQL Server, and Oracle technologies. Builds REST APIs, optimizes database queries, translates business requirements into technical designs, and collaborates with IT, QA, and business stakeholders. The role supports cloud-native architectures on Azure or AWS, Agile delivery, code reviews, CI/CD, and development leadership.

Lead a team of software engineers while owning application system roadmaps, prioritization, implementation, delivery, technical leadership, and continuous improvement. Develop highly reliable and available software, manage competing priorities, mentor employees, and collaborate with leaders across SpaceX. The role focuses on procurement and related manufacturing, supply chain, and warehouse management systems.

Leads development and sustainment of the DOW logistics application using Java, JavaScript, and SQL. Designs application components, integrations, backend services, and system architecture; provides technical guidance; troubleshoots issues; improves performance; enforces code quality; collaborates with QA, DevSecOps, and systems engineers; and maintains technical documentation.

Own electrical application engineering for prefabricated data-center platforms, including power distribution, switchgear, MCCs, UPS systems, transformers, controls integration, documentation, vendor requirements, BOM accuracy, and design-risk evaluation. Translate customer specifications into manufacturable solutions, support prototyping and FAT/SAT testing, troubleshoot first-article builds, and coordinate with mechanical, controls, sales, supply chain, operations, vendors, and fabricators. The role is remote with up to 25% travel and requires independent senior-level technical ownership.

Develop highly reliable software applications supporting SpaceX launch vehicles, Starlink, manufacturing, and satellite operations. Responsibilities include designing systems, building prototypes, improving application performance, collaborating on architecture and code reviews, and owning software development through deployment and monitoring. The role involves full-stack development, web applications, data processing, databases, cloud-native technologies, testing, and continuous integration. This is an onsite position that may require extended hours based on launch schedules.

Build and ship Android and/or iOS features for BJAK's AI Neobank app. Own end-to-end mobile experiences—from product problem through releases—working with backend, design, product and AI teams. Improve app quality using analytics, crash reports, and user feedback, and raise standards for UX, reliability and performance.

Provides technical and sales support for filtration and pressure equipment applications. Designs and sizes equipment, interprets engineering standards and customer specifications, prepares quotations and cost estimates, supports sales teams and distributors, coordinates with manufacturing and drafting, and develops cost-effective solutions. Requires expertise in pressure vessels, piping, pressure equipment design and manufacturing, and filtration processes. Travel is up to 50%.

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.

Lead hands-on development and operation of billing, usage, rates, and marketplace systems. Build primarily in Go while contributing to TypeScript and React applications, Kubernetes infrastructure, databases, CI/CD, and cloud services. Improve reliability, automation, observability, auditability, and production recovery. Deliver projects end to end, investigate incidents, participate in on-call, collaborate across teams, and provide technical leadership through design, reviews, mentoring, and operational improvements.

Architect, build, and own Mozilla’s Salesforce platform supporting enterprise sales and revenue operations. Responsibilities include designing data, security, sharing, and business-process models; developing with Salesforce Flow, Apex, SOQL, and Lightning Web Components; integrating Salesforce with NetSuite, BigQuery, and other systems; establishing CI/CD, testing, governance, and release practices; and creating secure MCP and AI-agent integrations. The role partners across Sales, Finance, Legal, Security, and IT while leading platform reliability, support, and long-term technical strategy.

Build and operate full-stack applications, customer portals, APIs, and backend services supporting usage metering, billing, provisioning, and cloud marketplace integrations. Develop primarily with TypeScript and React, alongside Golang and Node.js services. Lead technical design, improve reliability and observability, optimize CI/CD, participate in on-call, mentor engineers, and coordinate cross-functionally. Own production behavior across distributed systems, including reconciliation, rollout controls, monitoring, and recovery procedures.

Leads mechanical application engineering for prefabricated data-center platforms, including fan coil units, chilled-water skids, hydronic systems, and integrated assemblies. Translates customer requirements into manufacturable designs, sizes mechanical components, develops BOMs and technical documentation, and supports prototyping, FAT/SAT, and first-article builds. Collaborates with electrical, controls, supply chain, sales, operations, vendors, and fabricators while applying DFM/VAVE principles and maintaining revision-controlled documentation.

Develop reliable full-stack software and applications supporting SpaceX operations and employee experience. Responsibilities include prototyping, system design, product development, user problem analysis, architecture, code reviews, testing, deployment, monitoring, and performance optimization. The role involves collaboration with engineering teams and requires onsite work, with possible extended hours or weekends during launch periods.

Deploys and manages applications across development, testing, staging, and production environments. Builds Terraform infrastructure-as-code modules, maintains CI/CD pipelines, automates deployment processes, troubleshoots issues, and performs deployment testing. Ensures release-policy compliance, documents procedures, stays current with DevOps practices, and mentors junior engineers. Collaborates with development and operations teams to improve deployment reliability and efficiency.

Develop and maintain full-stack web applications for a federal environmental data client. Responsibilities include participating in Agile SDLC activities, designing and implementing scalable software, collaborating with analysts and stakeholders, testing and deploying applications, maintaining technical documentation, following development best practices, and recommending modern tools and technologies. The role requires AWS, TypeScript, Node.js, React or Angular, PostgreSQL, event-driven architecture, and strong communication skills.

Build and maintain full-stack applications that deliver AI/ML insights through backend services, REST APIs, containerized microservices, and high-performance front-end interfaces. Responsibilities include cloud-native development on Google Cloud or Azure, database management, testing, CI/CD automation, security, troubleshooting, and Agile collaboration.