OptiTalent · Job Finder
Jobs in California, United States
83 open roles read nightly from companies’ own hiring pages. Each one links to the original ad.
1–20 of 83 jobs
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Sr. Mobile iOS Engineer
YesterdaySpaceXSI · New York, United States +1
Senior$180K – $330K a yearEngineeringCraft delightful, intuitive user experiences that redefine how people interact with the app; Obsess over every pixel, animation, and interaction, ensuring the experience feels magical and seamless; Build blazing-fast, highly performant systems where every millisecond counts;…
Sr. Mobile Android Engineer
YesterdaySpaceXSI · New York, United States +1
Senior$180K – $330K a yearEngineeringCraft delightful, intuitive user experiences that redefine how people interact with the app; Obsess over every pixel, animation, and interaction, ensuring the experience feels magical and seamless; Build blazing-fast, highly performant systems where every millisecond counts;…
SpaceXSI · Palo Alto, California, United States
$160K – $250K a yearEngineeringDesign, build, and optimize large-scale distributed systems for multimodal pre-training, post-training, inference, data processing, and tokenization at web/petabyte scale; Develop high-throughput pipelines for data acquisition, preprocessing, filtering, generation, decoding,…
SpaceXSI · Palo Alto, California, United States
Senior$180K – $330K a yearData & AIDesign, build, and operate production-grade realtime and batch pipelines that ingest, process, validate, and deliver data powering user-behavior insights and product decisions; Create shared datasets, fact tables, and internal data products that let other teams analyze, debug,…
Sr. Software Engineer, Ads Product
YesterdaySpaceXSI · Palo Alto, California, United States
Senior$180K – $330K a yearEngineeringBuild and ship product features across the X Ads Platform; Work on systems related to ad delivery, targeting, optimization, measurement, and advertiser experience; Use SpaceXSI's infrastructure and AI capabilities to improve the performance and quality of advertising products;…
Analytics Engineer (X)
YesterdaySpaceXSI · Palo Alto, California, United States
Mid level$140K – $225K a yearData & AIDesign, implement, and optimize end-to-end data pipelines for processing high-volume datasets using tools such as Spark, Kafka, and/or Flink; Develop quantitative models and statistical frameworks to support experimentation, forecasting, and performance measurement; Build and…
SpaceXSI · Palo Alto, California, United States
Senior$220K – $357K a yearEngineeringArchitect and implement scalable distributed infrastructure for model serving (load balancing, auto-scaling, batch scheduling, global KV cache); Optimize latency and throughput of model inference under real production workloads; Build and operate high-concurrency serving…
SpaceXSI · Palo Alto, California, United States
Senior$220K – $357K a yearEngineeringDesign, build, and optimize massive GPU clusters for extreme-scale training and inference workloads; Develop and tune low-level CUDA kernels (GeMM, Attention, etc.), using CUTLASS, Tensor Cores, and Nsight for maximum performance; Profile, debug, and eliminate bottlenecks…
SpaceXSI · Palo Alto, California, United States
Senior$180K – $400K a yearEngineeringDesign and implement the systems backing all RL workloads at SpaceXSI, from small scale ablations to production training runs; Profile, debug, and optimize end-to-end training performance; Improve scalability and observability of the RL stack
Sr. Model Engineer, Post-Training & RL
4 days agoSpaceXSI · Palo Alto, California, United States
Senior$180K – $600K a yearEngineeringDesign and run rigorous experiments that turn research ideas into measurable gains in model capability; Improve model recipes through data quality, deduplication, and mixture experiments; Define what makes RL data and rewards good, including grader design and preventing reward…
Sr. Model Engineer, Mid-Training
4 days agoSpaceXSI · Palo Alto, California, United States
Senior$180K – $440K a yearEngineeringScale synthetic coding data to trillions of tokens with large-scale docker verification; Distill the intelligence of flagship models into flash models through synthetic data generation; Optimize mid-training data mixtures to boost the ceiling for RL; Engineer long-context data…
KYC Analyst
8 days agoSpaceXSI · New York, United States +1
Entry level$100K – $135K a yearPerform initial (first-line) KYC and sanctions reviews, and investigate escalated or complex cases; Resolve identity mismatches; Review and disposition OFAC sanctions and PEP alerts; Complete EDD and adverse media reviews on higher-risk customers; Complete KYB and ultimate…
Senior Product Manager, Commerce Platform
10 days agoSpaceXSI · Palo Alto, California, United States
Senior$180K – $275K a yearEngineeringOwn the product roadmap for the commerce platform billing system across Grok, X, Grok Bot, and Cursor; Define requirements and drive delivery for purchase flows, including checkout, paywalls, upsell, and promotional offers; Lead triage of billing issues at scale. Set…
Security Engineer, GRC Federal Frameworks
2 weeks agoSpaceXSI · Austin, Texas, United States +3
Mid level$100K – $198K a yearSecurityExecute security compliance implementation and audits (e.g. DoD Cloud Computing SRG IL5/IL6, FedRAMP Class D. (Rev. 5 / CR2026), NIST 800-53, NIST 800-171/CMMC, Risk Management Framework); Oversee audits, certifications, third-party assessments, and vulnerability management to…
Security Engineer, GRC Sales
2 weeks agoSpaceXSI · New York, United States +2
Senior$100K – $198K a yearSecuritySupport the sales organization as a cybersecurity/GRC presales partner: attend customer and prospect meetings, present our security and compliance posture, and answer technical and control-related questions with accuracy and judgment; Own and continuously improve responses to…
Security Engineer, Kubernetes
2 weeks agoSpaceXSI · Austin, Texas, United States +3
Mid level$100K – $198K a yearSecuritySecure the platform end to end: nodes, clusters, pods, roles, tokens, secrets, service-to-service communication, and the supply chain; Find and remediate overprivileged permissions, dangerous pod and workload settings, and escalation paths in operators, admission, networking,…
Data Visualization Engineer
3 weeks agoSpaceXSI · Palo Alto, California, United States
$132K – $198K a yearData & AIAdminister our BI platform (currently Tableau Server) as its sole administrator: upgrades, patches, maintenance, license management, SSO, and data drivers; Support 12 department sites and their Site Admins, plus about 700 users, including owning the tbl-site-admins and tableau…
SpaceXSI · Austin, Texas, United States +3
Mid level$100K – $258K a yearSecurityDesign and implement secure bare-metal and private-cloud architectures (servers, storage, out-of-band management, BIOS/UEFI/BMC firmware posture); Harden physical and virtual fleets: OS baselines (Linux/Windows), CIS benchmarks, patch and vulnerability management, and secure…
Application Security Engineer, X Money
5 weeks agoSpaceXSI · Austin, Texas, United States +3
Mid level$100K – $258K a yearSecurityConduct in-depth code reviews and static analysis to identify and mitigate security vulnerabilities in financial applications; Design and implement secure coding guidelines and best practices for development teams; Collaborate closely with development teams to integrate…
Cook, Sushi
5 weeks agoSpaceXSI · Palo Alto, California, United States
Part-timeMid level$32.50 – $35.00 an hourHospitality & retailManage and monitor inventory levels and ingredients; Assist in establishing menu specifications; Maintain quality by ensuring products are prepared according to guidelines; Enforce food quality; Ensure safety of physical kitchen and café space; Assist with and distribute work…
Updated 07 Nov 2026 10:21 UTC from the OptiTalent job library.