Python Open Source Software Engineer

About LanceDBLanceDB is an innovative, developer-centric, open-source database designed for multimodal AI applications. We provide robust solutions ranging from hyper-scalable vector search capabilities to advanced retrieval for Retrieval-Augmented Generation (RAG). LanceDB is your ideal partner for creating AI applications, enabling seamless interaction with large-scale AI datasets and powering some of the most cutting-edge applications across various industries.About the RoleWe are seeking a Senior Open Source Engineer to enhance the presence of LanceDB within the extensive data infrastructure ecosystem. You will engage in projects that sit at the convergence of high-performance computing, big data, and open-source systems. Your contributions will drive integrations, optimize distributed operations, and support initiatives within the Apache and AI communities.Key ResponsibilitiesLead open-source community initiatives to integrate the Lance format with systems such as Spark, Hive Metastore, Presto, Trino, and Ray.Design and sustain efficient distributed operations for Lance datasets.Develop optimized indices to facilitate predicate pushdown and enhance query performance in Spark, Ray, or Trino.Engage in the development of table formats, data encodings, and various components of the Lance format using Rust.Manage and enhance internal data processing infrastructure.Advocate for the Lance format in open-source forums and at major Big Data conferences.RequirementsOver 10 years of experience in developing high-performance databases, big data systems, or large-scale data services.In-depth knowledge of the internal workings of open-source Big Data or AI training systems such as Hadoop, Spark, Flink, Ray, Iceberg, Delta Lake, Hudi, ClickHouse, Trino, Presto, PyTorch, or JAX.Extensive experience with high-performance computing using Java or Scala.Familiarity with Rust is preferred, or a strong willingness to learn.Demonstrated ability to work efficiently, independently, and collaboratively within a high-caliber team environment.Preferred QualificationsActive contributor, committer, or PMC member in Apache or other significant open-source projects.Experience with Java, Rust, C++, Apache Arrow, DataFusion, Parquet, Iceberg, or Delta Lake is a plus.

About LanceDBLanceDB is an innovative, developer-centric, open-source data lake designed for multimodal AI applications. From ultra-scalable vector search capabilities to sophisticated retrieval processes for RAG, LanceDB serves as the cornerstone for your AI applications, enabling the development of groundbreaking solutions and addressing complex requirements in today's tech landscape.About the RoleWe are seeking a highly skilled Senior Solutions Engineer who merges a profound technical comprehension of AI/ML infrastructure with exceptional communication and solution development skills. In this pivotal role, you will act as a trusted advisor to potential customers, design partners, and key accounts, effectively connecting cutting-edge AI engineering with practical business use cases.This position is perfect for individuals who excel at the crossroads of technical expertise and customer engagement, relishing the opportunity to create tailored solutions, demonstrations, and integrations that highlight LanceDB’s capabilities in production settings.Your Responsibilities Will IncludeLead technical discussions in pre-sales environments—collaborating with account executives to define, design, and articulate the advantages of LanceDB tailored to specific customer workflows.Conduct technical discovery and architecture design sessions with prospects spanning various sectors, including AI infrastructure, LLM operations, and multimodal data pipelines.Create and present custom demonstrations and proof-of-concepts to showcase how LanceDB addresses complex challenges related to RAG, vector search, and feature engineering.Serve as a liaison between customer challenges and our engineering/product teams—providing insight that informs roadmap priorities based on real-world feedback.Collaborate closely with design partners and early adopters to ensure successful onboarding and expansion of the product.Promote an exceptional developer experience with a keen focus on documentation, SDK usability, and integration workflows.RequirementsYou thrive in a dynamic, fast-paced startup atmosphere and enjoy collaborating with high-caliber teams.You possess 5+ years of experience in roles such as Sales Engineer, Solutions Engineer, ML Engineer, or in AI Infrastructure, specifically dealing with AI/ML products or platforms.A strong understanding of AI/ML frameworks like PyTorch and TensorFlow, along with their integration into infrastructure for model training, fine-tuning, and inference.

Forward Deployed Engineer – LanceDBLocation: San Francisco Bay Area (In-Person / Hybrid)Team: EngineeringJob Type: Full-TimeAbout LanceDBAt LanceDB, we are pioneering the future of data management with our open-source, cloud-native vector database and multimodal AI lakehouse. Our platform is designed using a high-performance columnar format, empowering developers and businesses to create scalable, real-time search and analytics applications that integrate vectors, structured data, and AI workflows seamlessly. With options for both embedded and managed deployment models, alongside rich SDKs in Rust, Python, and other programming languages, LanceDB is expertly crafted to enhance state-of-the-art retrieval, feature engineering, and large-scale AI systems.Role OverviewJoin our dynamic Engineering team as a Forward Deployed Engineer (FDE). In this pivotal role, you will bridge the gap between deep systems engineering and direct customer engagement. You will collaborate closely with our strategic clients in the Bay Area to architect, deploy, and optimize LanceDB in high-demand production settings.This is a highly technical, product-facing role. You will not only solve customer challenges but also contribute production-quality code and valuable insights back to LanceDB’s core product lines. Your practical experience in deploying LanceDB alongside modern data infrastructures will play a crucial role in shaping our product architecture, APIs, and overall performance.What You’ll DoLead on-site and remote technical deployments of LanceDB with enterprise clients, focusing on architecture design, performance tuning, and operational stability.Develop and maintain production-grade code in Rust and Python for customer integrations and internal tools.Contribute code upstream to LanceDB’s core repositories, including bug fixes, feature enhancements, and architectural adjustments based on client needs.Gather and relay structured product feedback from customer interactions to product and engineering teams, shaping future roadmaps and designs.Integrate LanceDB into existing data and AI infrastructure stacks like Spark and Ray.Troubleshoot and resolve complex challenges related to distributed systems and cloud environments.

About LanceDBLanceDB is an innovative, developer-centric, open-source database designed for multimodal AI applications. With features such as hyper-scalable vector search and advanced retrieval for Retrieval-Augmented Generation (RAG), along with streaming training data and interactive exploration of extensive AI datasets, LanceDB serves as the premier foundation for your AI applications, empowering some of the most revolutionary projects today.About the RoleWe are on the lookout for a seasoned Fullstack Engineer to become part of our elite team, enhancing the user experience at the forefront of high-performance vector databases in the cloud.Your ResponsibilitiesCrafting exceptional experiences for users to explore and manage their multimodal data.Collaborating closely with team members and designers to optimize user experience.Developing scalable backends for LanceDB Cloud that deliver a serverless experience for vast datasets.Working at a rapid pace with a talented team of core contributors to groundbreaking projects like Python Pandas, Apache Arrow, Delta-rs, and Hadoop, to shape the next generation of data systems for AI.Preparing for future leadership roles as the team expands.Driving initiatives to elevate architecture standards and best practices within the company.Utilizing our tech stack: Typescript, React, Python, Rust, AWS, Google Cloud, Azure, Kubernetes, and Terraform.

Join LanceDB as a Senior Support Engineer and play a critical role in enhancing our customer experience. As part of our dynamic team, you will leverage your technical expertise to troubleshoot complex issues, provide timely resolutions, and ensure customer satisfaction. This position offers the opportunity to work closely with our engineering and product teams to iterate on our solutions and improve our services.

Your ImpactJoin Onyx, a leading open-source initiative with a thriving community of hundreds of thousands of users. Our project boasts over 13,000 stars and a vibrant community of more than 3,000 members on platforms like Slack and Discord. As a Technical Lead in Frontend Development, your contributions will shape the future of our product, potentially impacting millions of users worldwide. About the RoleAs an early team member, you will be instrumental in defining our core product. Help us transform into the premier “GenAI for work” application on the global stage!Your responsibilities will include:Leading frontend development for our default open-source chat interface, enterprise search platform, and agent builder, focusing on:Creating a stunning core search and chat experience with seamless animations and top-notch performance, akin to building the UI/UX layer for both Perplexity and ChatGPT.Implementing a diverse feature set, including workspace search, internet search, code interpretation, artifact management, deep research, and much more.Collaborating closely with our design team and founders to ensure alignment and vision.Establishing frontend priorities and best practices to foster a high-quality development environment.Building a robust culture of design and frontend engineering excellence.Encouraging community engagement by guiding contributors in enhancing the frontend.This position is on-site in San Francisco, CA. You’ll Be Successful If You Have…A minimum of 4 years of experience in frontend engineering, specifically in developing complex, user-facing applications.A high standard for your work and the ability to inspire others to achieve exceptional results.Deep expertise in JavaScript, TypeScript, React, NextJS, and other cutting-edge frontend technologies.Strong communication skills, enabling effective collaboration with cross-functional teams.A keen product and design intuition that guides your development choices.⭐ Bonus Points If You Have:Experience with Python and Postgres.A degree in Computer Science or a related technical field.Background as a founder or early-stage engineer in a seed or Series A startup.

About Us:At LangChain, we are on a mission to make intelligent agents commonplace. Our platform serves as the backbone for agent engineering in real-world applications, enabling developers to transform their prototypes into production-ready AI agents that organizations can depend on. Initially recognized for our widely adopted open-source tools, we have evolved to also provide a comprehensive platform for building, evaluating, deploying, and managing agents at scale.Today, our solutions including LangChain, LangGraph, LangSmith, and Agent Builder are utilized by teams delivering genuine AI products across both startups and large enterprises. Millions of developers rely on LangChain to empower AI teams at prominent companies such as Replit, Clay, Coinbase, Workday, Lyft, Cloudflare, Harvey, Rippling, Vanta, and 35% of the Fortune 500.With $125 million raised in Series B funding from leading investors including IVP, Sequoia, Benchmark, CapitalG, and Sapphire Ventures, we are in an exciting phase of product development, experiencing rapid growth where every team member can significantly influence our projects and collaborative work culture. At LangChain, your contributions can reshape how technology manifests in the real world.About the Role:We are seeking a dedicated core maintainer to join the LangChain team. This individual will play a crucial role in enhancing and maintaining the LangChain JavaScript package. Preference will be given to candidates who can work in person in San Francisco.Enhancing the core abstractions and runtime of the langchain and langgraph packagesImproving and expanding documentationResponding to user inquiries and resolving issues effectivelyUtilizing langchain to develop example applicationsSuccess Factors:Minimum of 3 years of experience in software engineering or applied machine learningStrong background in Software EngineeringExceptional written and verbal communication skills, capable of conveying technical concepts to both technical and non-technical audiencesAbility to thrive in a fast-paced environment and view unstructured settings as opportunities to define impactful workOwnership mindset; proficient at managing tasks independently and effectively

-- Are you seeking an opportunity to join our innovative team but can’t find the perfect position? Submit your application here! --At dryft, we specialize in creating intelligent systems that streamline complex human decisions in manufacturing operations.Our small, highly skilled team boasts diverse backgrounds, with a shared passion for the physical world encompassing cars, machines, and planes. Our team includes alumni from Stanford, Berkeley, CDTM, TUM, winners of Stanford TreeHacks, and recipients of prestigious Fulbright & Haniel scholarships, along with innovators who have developed everything from robots and race cars to widely-used software.We are proudly supported by industry leaders and founders from companies such as Amazon, Facebook, Stripe, Applied Intuition, and others; alongside investors like General Catalyst and Neo, as well as board members from major global industrial firms.Currently, we are already saving our clients millions, yet this is merely the beginning. While ERPs dominated the physical world for the past fifty years, dryft is leading the way into the future.

At Hover, we empower individuals to design, enhance, and safeguard the properties they cherish. Our innovative AI technology, built on over a decade of real estate data, provides answers to pivotal questions like, “What will it look like?” and “What will it cost?” Homeowners, contractors, and insurance professionals depend on Hover for accurate, fully-measured, and interactive 3D models of any property, all achievable through a quick smartphone scan.Driven by curiosity and purpose, we are committed to serving our customers, communities, and one another. We believe that diverse perspectives yield the best ideas and are proud to foster an inclusive, high-performance culture that promotes growth, accountability, and excellence. Supported by renowned investors such as Google Ventures and Menlo Ventures, and trusted by industry leaders like Travelers, State Farm, and Nationwide, we are revolutionizing how people perceive and engage with their environments.Why Join Hover?We are transforming the construction industry by providing modern tools for design, documentation, and project estimation—areas that have long been neglected by software solutions. We seek a Senior Software Engineer excited to tackle real-world challenges and deliver software that aids thousands of professionals in designing, scoping jobs, planning projects, and achieving superior results for homeowners.In this role, you will utilize your strong technical skills, product insight, and collaborative spirit. You will take ownership of features from concept through to user delivery, influencing our development approach and enhancing your leadership abilities beyond coding. This position is perfect for someone ready to embrace greater responsibility, drive results with cross-functional teams, and shape the technical roadmap for a high-impact group.Your ContributionsAs a Senior Software Engineer, you will work across the stack—primarily using Ruby on Rails, React, and GraphQL—with opportunities to contribute to React Native mobile applications. You will build robust, scalable systems that power Hover's core product experiences.You will lead projects and features from inception to launch, covering everything from technical discovery and design to iteration and enhancement. Your contributions will impact customer-facing workflows, including onboarding, interactive design tools, inspections, and transactional systems, as well as platform capabilities that ensure product consistency.From crafting polished user interfaces to modeling backend systems and designing APIs, you will influence how professionals interact with Hover throughout their workflows. You will work closely with product and design teams, enhance shared systems, and foster a positive engineering culture through mentorship and collaboration.

Join our dynamic team as a Senior Software Engineer at toma, where you will play a pivotal role in developing innovative software solutions that drive our business forward. In this position, you will collaborate with cross-functional teams to design, implement, and maintain scalable applications. Your expertise will be essential in ensuring high-quality code and streamlined processes, ultimately enhancing our product offerings.

Join Oura as a Senior Sourcing Manager specializing in Battery technologies. In this pivotal role, you will drive sourcing strategies, enhance supplier relationships, and ensure our products meet the highest quality standards. You will collaborate with cross-functional teams to optimize supply chain efficiency and contribute to the development of cutting-edge battery solutions.

Join Crusoe as a Senior Data Engineer, where you will play a critical role in enhancing our data infrastructure and analytics capabilities. You will be responsible for designing, developing, and maintaining robust data pipelines to support our cutting-edge applications.As a key member of our engineering team, you will work closely with data scientists and analysts to ensure that data is accessible, accurate, and actionable.

The City and County of San Francisco seeks a Senior Stationary Engineer to help operate and maintain stationary engines and mechanical systems in city facilities. This full-time position plays a key role in keeping heating, cooling, and power systems running smoothly for the community. What you will do Operate and maintain stationary engines and related equipment in municipal buildings Monitor system performance to keep heating, cooling, and power operations efficient Handle both routine and emergency maintenance tasks as they come up Work closely with colleagues to ensure continuous city services Requirements Solid understanding of mechanical systems and stationary equipment Dedication to safety and sustainable work practices Ability to contribute effectively within a team Experience supporting building infrastructure operations Location This role is based in San Francisco.

Are you passionate about making a difference? Join our team! At GoFundMe, we're proud to be the leading platform for community support, enabling individuals and nonprofits to connect and uplift each other. Since our inception in 2010, we've facilitated over $40 billion in fundraising efforts, helping countless people in times of need. We are currently seeking a talented Senior Search Engineer to spearhead the design and implementation of our next generation of search and retrieval systems, incorporating cutting-edge machine learning technologies and generative AI applications. You will work alongside a dedicated team to create impactful solutions that enhance user experiences and drive business success. Please note that candidates for this role must be located in the San Francisco Bay Area, as this position requires in-office attendance three times a week.

Join our dynamic team at tvScientific as a Senior Data Engineer. In this role, you will play a pivotal part in shaping our data infrastructure, enhancing our analytics capabilities, and driving data-driven decision-making across the organization. You will collaborate closely with cross-functional teams to implement innovative data solutions that support our strategic objectives.

At Crusoe, we are on a mission to accelerate the abundance of energy and intelligence, creating an environment where innovation thrives. As we build the infrastructure that empowers ambitious AI-driven projects, we prioritize sustainability without compromising on scale or speed.Join us in being part of the AI revolution with cutting-edge technology at Crusoe, where you will spearhead impactful innovations and collaborate with a team committed to transforming cloud infrastructure responsibly.About This RoleWe are looking for a Senior API Integration Engineer who will act as a vital technical partner in our enterprise-wide digital transformation efforts. This role is pivotal in driving intelligent automation and scalable system integrations, particularly within our People Tech ecosystem, with a strong focus on Workday HCM.What You’ll Be Working OnDesigning and developing enterprise-grade integrations utilizing the Workato ONE platform to facilitate intelligent workflow automation.Creating and maintaining robust API integrations across Workday HCM and the wider People Tech landscape, which includes payroll, ATS, LMS, compensation, benefits, performance, and analytics.Employing AI-driven automation within Workato to enhance efficiency, reliability, and process optimization.Establishing reusable integration architecture patterns, frameworks, and governance standards that can scale across both automated and human-led workflows.Collaborating with business and IT stakeholders to gather requirements, lead discovery sessions, assess ROI, and translate complex needs into scalable tech solutions.Overseeing integration initiatives from concept through deployment, including sprint execution, technical reviews, and delivery accountability.Providing senior-level escalation support to ensure the reliability and monitoring of critical integrations.What You’ll Bring to the TeamA minimum of 7 years of experience as an API Developer or Integration Engineer in enterprise-level environments.At least 3 years of hands-on production experience with Workato, especially with Workato ONE.Proven expertise in building and maintaining complex Workato integrations.

Crusoe Technologies seeks a Senior Manager of Sourcing based in San Francisco, CA. This position leads sourcing initiatives and helps define procurement strategies for the company. Key responsibilities Design and execute sourcing strategies that balance cost savings with quality improvements Build and maintain strong relationships with suppliers to align with business objectives Work closely with teams throughout the organization to improve procurement processes Guide sourcing and procurement efforts to support company growth Role focus This role centers on driving effective sourcing practices and collaborating across departments to enhance procurement outcomes. Leadership in this position directly influences Crusoe Technologies' ability to meet its operational and strategic goals.

Employee Applicant Privacy NoticeAbout Us:Join us in shaping a brighter financial future. At SoFi, we are revolutionizing the personal finance experience for our millions of members through innovative mobile technology.As a next-generation financial services company and national bank, we pride ourselves on being at the forefront of an unprecedented transformation in the industry. Our core values guide our efforts every day, driving meaningful changes that impact people's lives. Invest in yourself, your career, and the financial world with us.SoFi is on the lookout for a seasoned and driven Senior Staff Data Engineer to lead our Data Engineering group within the SoFi Data Platform (SDP) division. The SDP's mission is to harness data across SoFi, enabling the development of personalized and engaging experiences for our members.The Role:In this position, you will have the chance to significantly influence and steer the architecture of our next-generation AI-powered SoFi Data Platform (SDP). You will enhance data reliability through AI-driven workflows, tools, and practices. You will be responsible for leading, defining, and tackling complex problems in a fast-paced, collaborative environment. The ideal candidate will be a mentor and technical leader who is hands-on, with a strong sense of ownership and a commitment to delivering results.

About Mariana MineralsAt Mariana Minerals, we are pioneering a software-centric approach to mineral sourcing. Our mission is to deliver the critical minerals essential for modern energy, AI, and defense technologies. We aim to transform the mineral supply chain through innovative software, automation, and data-driven strategies.Join us in our quest to redefine responsible mineral sourcing and supply for a sustainable future.Role OverviewWe are in search of a dynamic and detail-oriented Project Engineer to help develop the critical minerals supply chain that supports the global transition to renewable energy. In this position, you will facilitate communication among engineering, procurement, construction, and operational teams to ensure project success.Your responsibilities will include maintaining project workflows, overseeing document control, tracking engineering and vendor deliverables, coordinating reviews across disciplines, managing RFIs, and creating dashboards for real-time project insights.