Top Senior Software Engineer Jobs in Milwaukee, WI

Serve as an embedded Linux expert on customer projects: design and refactor real-time architectures, develop Linux kernel drivers, debug low-level hardware/software issues, optimize kernel performance, collaborate with customers and internal teams, lead technical efforts, produce high-quality deliverables, and create technical proposals to support product lifecycle and certification.

The Senior Software Engineer will design and maintain MediaWiki's backend components, ensuring quality and operational excellence across the platform while mentoring team members and aligning with WMF strategies.

Design, develop, and operate scalable, low-latency backend Guidance services for navigation. Solve complex guidance scenarios, build customizable solutions for OEMs and niche customers, and create tooling and AWS-based infrastructure to support mapping and navigation features.

Develop, design, and maintain production software for autonomous mission management of a satellite constellation. Contribute to architecture, implement scalable algorithms in Python and Go, support production operations, on-call rotations, launches, and cross-team integration for automated constellation operations.

Frontend-focused senior software engineer to lead and implement Search features in a high-traffic React/TypeScript app. Collaborate with backend, product, and design to build end-to-end features, optimize UX and performance, work with mapping/data visualizations, and participate in architecture, on-call rotations, and mentoring.

Lead design, development, and maintenance of SmithRx frontend features using JavaScript and React while ensuring high-quality code and scalability. Collaborate with product teams and mentor junior engineers.

Design and implement scalable Salesforce solutions, lead development teams, manage integrations, and mentor junior developers while ensuring security and compliance standards are met.

The Senior Software Engineer will design and maintain scalable applications for Loan Origination and Servicing, focusing on backend architecture and system design to enhance decision-making and workflows.

Design and build AI-augmented test tooling and automated test infrastructure across mobile, web, and backend. Integrate testing into engineers' workflows (IDE, CI, monitoring, chatops), define quality gates, instrument AI usage and costs, ensure secure handling of PHI, and produce reusable libraries, documentation, and training to help teams adopt automated quality workflows.

Lead design, architecture, and hands-on implementation of scalable healthcare SaaS systems. Drive interoperability (HL7, FHIR, EDI), mentor engineers, liaise with stakeholders, manage technical risk, and ensure quality, performance, security, and innovation.

Build and maintain backend systems, APIs, and data infrastructure powering member experiences and clinical workflows. Collaborate with frontend and product teams, ensure code quality, debug production issues, optimize performance and scalability, and propose new technologies.

Build and evolve Nexus interfaces for Temporal SDKs across multiple languages. Design and implement runtime APIs and behaviors, integrate SDKs tightly with language runtimes for durable, deterministic execution, collaborate with OSS community, write technical documentation, and own end-to-end features with high reliability.

Lead maintenance, enhancement, and support of enterprise mainframe applications. Design, develop, troubleshoot, and optimize COBOL/CICS/JCL/DB2/VSAM systems, manage incidents/changes via ticketing tools, produce technical documentation, and mentor junior engineers.

Lead design, develop, and maintain scalable full-stack web applications. Mentor engineers, perform code reviews, troubleshoot production incidents, optimize performance, ensure API-first design, support cloud-native deployments (Kubernetes), and participate in on-call rotations.

Lead architecture and technical direction for a cloud-native contact center platform. Design scalable, reliable frontend and backend systems, resolve complex production incidents, mentor senior engineers, and drive engineering standards and cross-team alignment.

Build and operate Go backend services for a non-custodial KMS powering embedded wallets. Implement key recovery, distributed key generation, TEE integrations, authentication and signing-provider flows, security review and hardening, and production operations on Kubernetes, including observability, secrets/certificate management, and compliance controls.

Lead design, development, and maintenance of scalable, cloud-native web applications. Own end-to-end product features, mentor engineers, troubleshoot production incidents, improve performance, implement APIs, and support on-call rotations.

Lead platform and infrastructure engineering to improve stability, developer productivity, CI/CD, observability, and shared libraries. Deliver platform projects, mentor engineers, own production availability and on-call, and drive platform decisions and best practices across the org.

Lead end-to-end design and delivery of prototypes and MVPs for a new product initiative. Collaborate with product and success teams for discovery, scope, and iteration; own technical decisions and architecture tradeoffs; incorporate customer feedback and communicate progress to stakeholders.

Lead product and technical discovery for a new initiative, build prototypes and end-to-end MVPs, define metrics and decision processes, rightsize architecture for iteration and integrations, and engage customers for feedback while coordinating external PM/design/business stakeholders.

Design, build, and operate high-scale Customer Care and Identity systems using React, TypeScript, Java/Node.js. Lead AI-first workflows, own end-to-end full-stack features, implement AI-driven efficiencies, ensure security and reliability, mentor peers, and collaborate cross-functionally on integrations and operational excellence.

Lead design, development, testing, and maintenance of scalable data-centric applications using Python, React/Next.js, and PostgreSQL. Optimize schemas and data pipelines, build responsive UIs for analysis and reporting, address performance and security issues, perform code reviews, mentor junior engineers, and drive architecture and technical decisions for the Clinical Operations Platform.

Senior Full-Stack Engineer for Hospitality Fulfillment working on backend services and microfrontends powering SpotOn's Express POS. Own features end-to-end, solve complex high-traffic production issues, integrate AI tools, provide technical leadership, mentor teammates, and work across stack including cloud/infra when needed.

Build and lead development of a customer-facing metric store for high-volume telemetry. Design scalable backend services, data models, ingestion pipelines, and query execution paths. Optimize query performance, storage efficiency, and system reliability. Collaborate with Product, Design, and Operations from architecture through production, mentor junior engineers, participate in on-call rotation, and help define testing, deployment, and operational practices.

Lead the design and delivery of AI-driven systems, guiding architectural patterns and ensuring engineering best practices while mentoring other engineers.