Top Software Engineer Jobs in Santa Cruz, CA

Develop and maintain native iOS applications using Swift and SwiftUI for DraftKings’ financial platform. Responsibilities include building user-facing features, integrating APIs, managing data and state, optimizing performance, monitoring crash analytics, participating in code reviews and testing, and troubleshooting reliability issues. The role collaborates with product, design, analytics, and engineering teams to deliver scalable, compliant mobile experiences.

Lead the development of foundational iOS platform systems, shared frameworks, developer tools, architecture standards, and multi-quarter migrations across Cash App and Square. Drive performance, reliability, security, testing, observability, release safety, and AI-assisted development practices. This hands-on individual contributor role influences multiple teams, develops technical leaders, and partners broadly to improve iOS engineering quality, productivity, and product outcomes.

Build and launch backend identity decisioning systems that validate consumer identity and satisfy KYC regulations. Collaborate with Product, Compliance, Auth, Fraud, Analytics, and engineering teams; decompose projects, write tested and extensible code, monitor system metrics, support availability and on-call operations, debug code, participate in reviews, and contribute to technical decisions and team development.

Build and own foundational Android platform infrastructure, including architecture, shared libraries, tooling, observability, performance systems, and developer experience. Lead cross-organizational technical initiatives, establish Android engineering standards, evaluate AI-assisted development tools, and build AI-powered platform capabilities. Collaborate across mobile, web, backend, product, and design teams while mentoring engineers and driving large-scale organizational impact.

Leads performance engineering across the organization by designing load-testing and data-generation frameworks, defining benchmarks and standards, analyzing application, database, and system behavior, and guiding teams in performance optimization. Builds reusable tooling and best practices using k6, JavaScript, Grafana, and InfluxDB while addressing scalability, latency, throughput, and reliability challenges in distributed cloud-native systems.

Staff Android Software Engineer responsible for owning Cash App’s foundational Android platform, including architecture, shared libraries, infrastructure, developer tooling, observability, performance, and experimentation systems. The role drives AI-native engineering practices, leads cross-organizational technical initiatives, establishes standards, mentors engineers, and partners across mobile, web, backend, product, and design teams. Requires deep Android expertise and organizational-level impact.

Build and deploy full-stack healthcare financial products used by millions of patients. Develop AI- and ML-powered features, integrate LLMs, enhance an AI billing assistant, and create patient payment solutions. Collaborate with product, design, and partner engineering teams to deliver production-ready software. Contribute to technical planning, coordinate complex development efforts, mentor peers, and maintain high standards for testing, code quality, efficiency, and technical debt management.

Design, build, scale, and operate high-volume payment APIs and distributed systems serving global traffic. Lead complex engineering projects from requirements through production, improve reliability, performance, observability, fault tolerance, and security, and participate in on-call and incident response. Collaborate across product and engineering teams, use AI-assisted development tools responsibly, and mentor engineers through technical reviews and documentation.

Design, build, scale, and operate high-volume payment APIs and distributed systems serving global traffic. Lead complex engineering projects from requirements through production, improve performance, observability, reliability, fault tolerance, and security, and participate in on-call incident response. Collaborate across product and engineering teams, use AI-assisted development tools responsibly, and mentor engineers through technical reviews, documentation, and guidance.

Develop and deploy customer-focused web, mobile, and backend applications across the full software stack. Design major features, contribute to architecture decisions, conduct code reviews, and ensure secure, high-quality implementations. Collaborate with stakeholders and cross-functional teams using Agile and SDLC practices. Manage version control, CI/CD, environments, and releases; maintain automated test coverage and perform root-cause analysis. Build and optimize relational data solutions using SQL Server, including complex queries, stored procedures, and performance tuning.

Design, build, deploy, and support scalable Java microservices on AWS. Provide technical leadership, architectural direction, code reviews, troubleshooting, proof-of-concept development, and cross-functional collaboration. Work with high-throughput data, messaging systems, distributed architectures, observability, and AI-assisted development tools. Participate in on-call support, mentor engineers, lead architectural initiatives, and deliver reliable SaaS platform features.

Lead the architecture and evolution of native iOS foundations supporting seller-facing applications. Identify systemic problems, define platform strategy and standards, build prototypes and reference implementations, lead multi-quarter migrations, and establish practices for quality, testing, observability, release safety, and maintainability. Develop senior engineers and create scalable ownership models across teams.

Own the development and maintenance of large-scale React Native applications for iOS and Android. Lead architecture improvements, React Native upgrades, native module development, performance optimization, automated testing, CI/CD reliability, and production debugging. Collaborate with cross-functional product pods, contribute to technical discovery and architecture, mentor engineers, and raise engineering standards while delivering scalable, maintainable mobile experiences.

Design, build, and operate foundational developer infrastructure across CI, build systems, deployment orchestration, and test platforms. Improve build speed, deployment safety, and test reliability while owning services end to end, including SLOs, observability, and on-call responsibilities. Partner with engineering teams to address platform pain points and lead cross-cutting technical projects through production.

Develop and maintain full-stack applications using Python, SQL, React, Java, and REST APIs. Build scalable backend services and data-driven features for water-management products, working with large-scale time-series data. Collaborate with product, design, QA, and engineering teams; troubleshoot technical issues; participate in architecture decisions; review code; mentor junior developers; and improve engineering practices. The role uses AI-assisted development tools and follows a hybrid schedule with at least three days onsite in Los Gatos, California.

Design and develop embedded Linux platform infrastructure for TeraWave satellite communications systems. Responsibilities include process management, IPC frameworks, kernel modules, device drivers, kernel optimization, hardware integration, system debugging, networking performance tuning, secure boot, runtime security, credential management, and full software lifecycle ownership across LEO satellites, terminals, and gateways.

Build and maintain embedded Linux platform infrastructure for TeraWave satellite communications systems. Responsibilities include developing kernel modules, device drivers, operating-system services, and inter-process communication frameworks; optimizing scheduling, memory, I/O, and networking performance; integrating custom hardware and SoCs; implementing secure boot and runtime security; debugging system performance; and owning software from architecture through deployment on LEO satellites.

Leads electrical software testing for TeraWave spacecraft avionics, from requirements and test planning through qualification, acceptance, integration, and flight support. Develops procedures, automation, instrumentation, data acquisition infrastructure, and scalable ground support equipment. Leads electrical and RF test campaigns, anomaly investigations, root-cause analysis, and corrective actions while coordinating across engineering, manufacturing, and production teams. Drives production readiness through test-time, yield, and anomaly metrics.

Leads electrical software testing for TeraWave spacecraft avionics from requirements through qualification, acceptance, integration, and flight support. Develops test strategies, procedures, verification matrices, automation, instrumentation, and scalable ground support equipment. Coordinates cross-functional test campaigns, investigates anomalies, drives corrective actions, and improves production readiness through metrics such as test time, first-pass yield, and anomaly rates.

Lead end-to-end electrical and avionics testing for TeraWave spacecraft systems, including test strategy, requirements, procedures, qualification, acceptance, integration, and flight support. Develop test infrastructure, automation, instrumentation, and scalable ground support equipment. Lead electrical test campaigns, anomaly investigations, root-cause analysis, corrective actions, cross-functional coordination, and production-readiness efforts for repeatable, high-throughput vehicle testing.

Leads electrical software test strategy, requirements, procedures, automation, instrumentation, and verification for TeraWave spacecraft avionics. Directs bench, vehicle-level, qualification, acceptance, EMI/EMC, and pre-launch test campaigns; investigates anomalies and drives corrective actions. Partners with manufacturing and production engineering to develop scalable ground support equipment, modular test infrastructure, and production-ready processes. Coordinates cross-functional technical teams and supports spacecraft integration and flight operations.

Develop and operate backend systems supporting post-transaction processing for Affirm Card. Break down projects, write tested and extensible code, collaborate with product and engineering teams, monitor system health, troubleshoot issues, participate in on-call support, and contribute to code reviews and team development.

Design and own secure, scalable wallet infrastructure for custody, key management, transaction signing, authorization, recovery, and multichain systems. Architect support for MPC, HSMs, secure enclaves, TEEs, smart contract wallets, account abstraction, and emerging cryptographic approaches. Define security boundaries, policy engines, secrets management, authentication, and programmable authorization while making foundational build-versus-buy decisions and guiding systems from first principles through production.

Develop production C++ and Python software for industrial robots used in assembly and inspection. Integrate cameras, sensors, and actuators; implement calibration, coordinate transforms, and real-time data pipelines; architect reliable multi-process and multithreaded systems; collaborate on 3D vision deployment; and build testing, debugging, and deployment infrastructure.

Lead technical strategy and execution for foundational Trust and Safety systems supporting consumer risk and credit reporting. Design and operate highly available backend systems, improve reliability and monitoring, establish engineering standards, guide complex cross-functional initiatives, and mentor engineers. The role involves ownership of system architecture, technical planning, operational readiness, code quality, and team development.