Freelance Software Developer (Rust) - AI Trainer

Job Opening: Full-Stack Lead – GenAI & LLM Applications Location: South San Francisco (SSF) - Hybrid - 3 days onsite Start Date: Immediate About the Role We are seeking a hands-on Full-Stack Developer with Generative AI expertise to join our team and lead the development of a real-time AI application leveraging AWS serverless architecture, FastAPI, and LLM-based pipelines. The ideal candidate is a builder with a deep understanding of full-stack development, cloud-native applications, and AI-powered user experiences.   Your Responsibilities ● Build and enhance React-based frontends hosted on CloudFront ● Design scalable, low-latency APIs using FastAPI (Python) integrated with API Gateway (REST + WebSocket) ● Develop AWS Lambda functions for backend services, data handling, and orchestration ● Hands-on experience with OpenSearch for implementing scalable search functionality ● Manage authentication using SSO, and enable secure access flows ● Integrate real-time WebSocket interfaces for LLM streaming and dashboarding ● Work closely with data science teams to connect LLM pipelines (LangChain + RAG) and vector search mechanisms ● Design and maintain serverless data layers using DynamoDB, Aurora PostgreSQL, Athena, and S3 ● Participate in CI/CD automation using GitHub Actions, CloudFormation/CDK, and manage IAM roles/policies ● Collaborate on data pipelines using AWS Glue, Airflow (MWAA), and Sagemaker for model training/inference   Key Technologies ● Frontend: React, TypeScript, CloudFront ● Backend: FastAPI (Python), AWS Lambda, API Gateway (REST + WebSocket), Cognito ● Search & Storage: OpenSearch, DynamoDB, Aurora PostgreSQL, S3, Athena ● GenAI & RAG: LangChain, FAISS, Pinecone, OpenAI, Claude, AWS Bedrock ● Data Engineering: AWS Glue, Airflow (MWAA) ● DevOps: GitHub Actions, CloudFormation/CDK, IAM Roles ● Streaming & Realtime: WebSockets, LLM streaming pipelines   You Should Have ● Proven experience in building production-grade GenAI features using LLM APIs and RAG pipelines ● Hands-on experience with serverless app development on AWS ● Solid understanding of FastAPI, microservices architecture, and REST/WebSocket API design ● Comfort with both structured data (PostgreSQL) and NoSQL (DynamoDB) ● Experience working in a CI/CD DevOps environment with infrastructure-as-code ● Excellent problem-solving skills, and ability to troubleshoot complex cloud-native systems

We are seeking a highly skilled Principal Software Engineer with extensive experience in Linux-based systems software design, security concepts, development, and testing. The ideal candidate will be responsible for implementing new cyber security features, developing implementation guidance for cyber security controls, and conducting research and development of novel cyber security concepts. Key/Primary Responsibilities • Develop cyber security software for Toyota products. • Operate with minimal oversight to define requirements with stakeholders and design the implementation of new features. • Investigate cyber security controls of processors and microcontrollers and develop Proof-of-Concepts and implementation guidance to suppliers. • Perform research and development of novel cyber security features. • Work with the open-source community to expand cyber security capabilities of existing projects and share new projects that are broadly useful outside of Toyota. • Develop software in accordance with team coding guidelines and industry standards including MISRA, SEI CERT, and AUTOSAR. • Collaborate with CICD teams to add new capabilities to the build and release pipeline and customize pipeline for new projects. • Collaborate with test teams to define testing strategies and assist in automated test development. • Lead internal testing team and provide guidance when regular leadership is unavailable. • Mentor junior and mid-level engineers in software development best practices and provide guidance in their design, implementation, and testing tasks. • Conduct root cause analysis of defects and lead initiatives to improve product quality and testing processes. • Work with a wide range of stakeholders to align on deliverable expectations, deployment timelines, and testing issues. • Facilitate team meetings, including sprint planning, retrospectives, and daily stand-ups, to ensure effective communication and collaboration. • Stay current with industry trends and best practices in embedded systems development, and advocate for their integration into the team’s processes. Requirements 10+ years of experience in embedded systems software development, with a focus on both hardware and software components. Strong understanding of embedded programming languages (e.g., C, C++) and real-time operating systems (RTOS). Experience developing embedded Linux systems, including Linux driver development, BSP integration and customization with tools such as Yocto, and board bring-up. Experience with testing tools and frameworks and developing automated tests. Knowledge of communication protocols (e.g., I2C, SPI, UART) and hardware interfaces. Excellent problem-solving skills and attention to detail. Strong leadership and communication skills, with the ability to motivate and guide team members.     Added Bonus: ·       Experience with embedded security features such as secure boot, TrustZone development, filesystem encryption, etc. ·       Experience developing in compliance with safety and security standards such as MISRA, SEI CERT, and AUTOSAR. ·       OSCP, SANS/GIAC, CISSP, or other related/equivalent certifications. ·       Experience with compliance regulations/laws, security frameworks and standards (e.g., ISO/SAE 21434, NIST, HIPAA, ISO, COBIT, OWASP, ITIL, etc.).   Experience with one or more of the following industries: law enforcement, defense, intelligence community, automotive, manufacturing, software,   Bachelor’s degree or higher, in Computer Science, Engineering or related discipline, or equivalent professional experience   Fluent in Japanese (reading, writing, speaking) for business and technical discussions. 

Job Description: Responsibilities 1. Frontend Architecture & Development Design and develop scalable, maintainable, and reusable React components. Implement TypeScript best practices for strongly typed applications. Architect efficient and optimized state management using Redux, Zustand, or Context API. Improve application performance with techniques such as code splitting, lazy loading, memoization, and virtualized lists. Ensure responsive and accessible UI using modern CSS methodologies (CSS-in-JS, Tailwind, Styled Components). 2. Test Automation & Quality Assurance Develop and maintain automated testing frameworks using Playwright and Cypress. Ensure comprehensive unit, integration, and end-to-end testing coverage. Build test strategies for cross-browser and cross-device compatibility. Implement strategies to reduce flakiness in test automation and maintain stability over time. Work closely with backend and DevOps teams to integrate tests into CI/CD pipelines."

Role Overview Our small product squad (2 fullstack engineers + PM) ships quickly, but customer demand is growing faster than we can build. We’re looking for a senior, product‑minded engineer who can wear many hats — architecture, data, fine-tuning & RAG, with a bit of product taste — and help lay the technical and cultural foundations of the company. What You’ll Do Own features end‑to‑end: design, build, ship, and iterate on backend services, web front‑end, and internal tooling. Scale our Gen‑AI stack: productionize retrieval‑augmented generation pipelines, implement evaluation harnesses, and harden monitoring/alerting. Shape engineering culture: introduce best‑in‑class CI/CD, code quality standards, security, and mentoring practices. Collaborate: work with product and sales to translate real patient pain points into elegant solutions. Influence roadmap: participate in product discovery, weigh technical trade‑offs, and keep us focused on what moves the needle. Required Technical Skills Our core technologies: Python, Postgres, MySQL, NextJS, LangSmith, AWS. We're flexible—use the right tool for the job. 5+ years building and operating production software U.S. work authorization & residency required Proven experience shipping LLM or conversational‑AI products at scale (LLM‑APIs, vector stores, agent frameworks) Proficiency in Python and modern JavaScript Familiarity with SQL and schema design Comfort with cloud infrastructure (AWS preferred) and infrastructure as code (IaC) Working knowledge of agents, vector search, embeddings, and RAG performance tuning Product taste: you sweat the UX details Good communication skills: you can explain complex trade‑offs to non‑engineers Nice-to-Haves Prior healthcare experience Understanding of HIPAA, SOC‑2, or other security/compliance frameworks Performance and cost‑optimization of ML workloads

API Kong Engineer Location: Phoenix, AZ (Hybrid – 3-5 days/week from office) Duration: 12 months Experience:8+Years   Job Description: We are seeking a skilled API Developer / Integration Engineer who is proficient in managing and optimizing APIs using KONG Gateway. As part of our team, you will be responsible for designing, developing, and deploying API solutions that enhance our platform’s functionality and performance. Responsibilities: Design and implement scalable API solutions using KONG Gateway. Collaborate with cross-functional teams to gather and understand integration requirements. Develop custom plugins and middleware to extend KONG Gateway functionalities. Optimize API performance and security through monitoring, tuning, and troubleshooting. Implement API management best practices including versioning, documentation, and access control. Integrate APIs with various backend systems and databases. Ensure high availability and reliability of APIs by implementing robust failover and redundancy strategies. Stay updated with the latest industry trends and advancements in API management and integration. Requirements: Proven experience in designing and developing APIs using KONG Gateway. Strong understanding of RESTful API design principles and best practices. Proficiency in programming languages such as Python, Node.js, or Java. Experience with containerization technologies like Docker and orchestration tools such as Kubernetes. Familiarity with API security standards (OAuth, JWT, SSL/TLS). Ability to troubleshoot complex API issues and performance bottlenecks. Excellent communication skills and the ability to collaborate effectively with team members. Proven experience as a Kong API expert or similar role. Strong knowledge of API design and development principles. Proficiency in Kong API gateway configuration and management. Experience with Kong plugins, Lua, and Kong Enterprise features. Familiarity with RESTful APIs, OAuth, JWT, and other API security protocols. Knowledge of containerization and orchestration tools (e.g., Docker, Kubernetes) is a plus. Strong troubleshooting and problem-solving skills.   Preferred Skills: Experience with other API gateways (e.g., Apigee, AWS API Gateway) is an advantage. Knowledge of cloud platforms (e.g., AWS, Azure, GCP).Experience with DevOps practices and CI/CD pipelines. Familiarity with logging and monitoring tools (e.g., ELK stack, Prometheus). Preferred Qualifications: KONG Certified Developer or Administrator. Experience with other API gateways and management platforms. Knowledge of microservices architecture and design patterns.  

Sawhorse Productions is a Los Angeles based, Award winning full-service creative studio turning ideas into unforgettable experiences through captivating branded content, viral social moments, and groundbreaking interactive experiences. We partner with industry-leading brands, artists, and studios such as Walmart, Google, NBCU, Fanatics, Toyota, Pepsi and Alo to deliver industry leading, innovative multi-platform content. At Sawhorse, we believe in fostering a culture of collaboration, creativity, and relentless excellence while shaping the future of digital storytelling. Our releases include: Walmart Discovered - 2024 ADDY Winner Alo Sanctuary Beetlejuice Escape the Afterlife Lamborghini Lanzador Lab - 2024 Telly Winner Elton John’s 'Beyond The Yellow Brick Road' Olivia Rodrigo  Fashion Klossette And numerous digital fashion releases on web3 platforms We are looking for experienced Full Stack Roblox Developers to craft best-in-class, high-fidelity experiences that redefine interactive entertainment. In this role, you’ll work alongside a team of industry pioneers, collaborating with game designers, artists, and engineers to develop immersive, scalable, and engaging gameplay. You’ll leverage the latest Roblox technologies, advanced scripting techniques, and performance optimization strategies to push the platform's boundaries, ensuring seamless cross-platform play across PC, mobile, and console. Requirements Design, develop, and optimize high-quality gameplay experiences: Write clean, efficient, and scalable Luau code that powers immersive Roblox experiences. Work directly with Creative and Product teams: Translate creative vision and KPIs into interactive, engaging, and data-driven gameplay experiences. Take ownership of features: Lead development cycles from concept to execution, ensuring best practices and industry standards are met. Coordinate with clients and stakeholders: Ensure the technical execution of gameplay features aligns with project objectives and branding requirements. Work cross-functionally with designers and engineers: Implement gameplay mechanics, UI/UX features, and interactive elements to enhance user experience. Collaborate with QA and product managers: Troubleshoot, debug, and optimize features for performance, reliability, and scalability across multiple devices. Implement and optimize game systems: Develop custom character controllers, AI behavior, and dynamic game mechanics using Object-Oriented Programming principles. Ensure cross-platform compatibility: Optimize gameplay performance across PC, mobile, and console while maintaining graphical and interactive consistency. Utilize the latest Roblox technologies: Implement StreamingEnabled, MemoryStoreService, and advanced data handling techniques for seamless user experiences. Qualifications A strong candidate for this position should have the following qualities: Proven Roblox development experience: 6-10 years of experience on the Roblox platform, with at least 2+ years of programming in Luau. Advanced proficiency in Roblox Studio & scripting: Expertise with Roblox API, object-oriented programming, CFrame manipulation, UI/UX scripting, and performance optimization. Strong understanding of backend services: Experience with Roblox’s datastore, MemoryStoreService, and efficient data handling techniques. Proficiency in GitHub & Rojo: Comfortable working in team-based environments using version control and collaborative coding workflows. Effective communication skills: Ability to explain technical concepts to both developers and non-technical stakeholders. Ability to work independently and collaboratively: Must be a self-starter with strong time-management skills in a remote, fast-paced setting. Nice To Have's Familiarity with open-source tools: Experience using Nevermore, Maids, Promises, Signals, and other community libraries. Game UX & UI expertise: Ability to design and implement smooth, intuitive user flows within the Roblox platform. Roblox plugin development: Experience creating custom Studio tools or plugins to streamline development workflows. Advanced mathematics & physics programming: A background in vector math, procedural animation, and physics-based interactions. Custom Avatar Rigging & Character Controllers: Experience designing unique character systems and animation pipelines. Interest in Web Development: Familiarity with front-end frameworks, API integrations, and external server communication is a plus. Benefits Hourly Rate: $40 - $60/hr (This is a Freelance position and hours may vary) Flexible, remote-friendly role with occasional in-office collaboration opportunities in Los Angeles. Opportunity to work on cutting-edge gaming projects with a team passionate about interactive entertainment. Collaborate with top-tier gaming and entertainment brands. This freelance position is hourly but general work hours are M - F 9:00 AM - 7:00 PM PST. Top performers will have the opportunities to move to full time if everyone is aligned.  EEO Statement Sawhorse Productions is an equal employment opportunity employer. All employees and applicants are evaluated on the basis of their qualifications, consistent with applicable state and federal laws. In addition, Sawhorse Productions will provide reasonable accommodations for qualified individuals with disabilities. Sawhorse Productions will consider for employment qualified applicants with criminal histories in a manner consistent with the requirements of applicable state and federal law.