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Open Source Software Author Cto Jobs

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Explore current open source software author cto jobs. Use filters to narrow by work mode, employment type, experience and date posted.

M
18mo ago

🚀 We’re on a mission to make money work for everyone. We’re waving goodbye to the complicated and confusing ways of traditional banking. After starting as a prepaid card, our product offering has grown a lot in the last 10 years in the UK. As well as personal and business bank accounts, we offer joint accounts , accounts for 16-17 year olds , a free kids account and credit cards in the UK, with more exciting things to come beyond. Our UK customers can also save , invest and combine their pensions with us. With our hot coral cards and get-paid-early feature, combined with financial education on social media and our award winning customer service, we have a long history of creating magical moments for our customers! We’re not about selling products - we want to solve problems and change lives through Monzo ❤️ 📍Barcelona, Spain | 💰 Base salary for this role is depending on experience + Incentive Awards tied to your performance + benefits Hybrid model: 3 days a week in the office About our Engineering Teams: We have over 650 engineers across Monzo who design and build our in-house banking platform. We have big ambitions for the future, and technology plays a big role in creating a bank our customers want, so engineers at Monzo collaborate across disciplines to solve interesting challenges throughout the company. These range from the products our customers use everyday to underlying infrastructure, security, payments and finance, customer operations, financial crime, and data, to name just a few areas. As a bank, there is scope for impact across a huge number of opportunities. We contribute to open source software as much as possible. Our blog is a good place to learn even more about what we do! Your day-to-day This role is all about collaborating with your team to make a difference to your customers. As a backend engineer you’ll work in a squad alongside other disciplines like product managers, marketers, us

javareactaws
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P
Palantir
📍 United States• Full-time• Hybrid• $135K – $200K/yr
47mo ago

A World-Changing Company Palantir builds the world’s leading software for data-driven decisions and operations. By bringing the right data to the people who need it, our platforms empower our partners to develop lifesaving drugs, forecast supply chain disruptions, locate missing children, and more. The Role Are you passionate about engineering quality, efficiency, and increasing the impact of engineers around you? Software Engineers at Palantir build software at scale to transform how organizations globally use data. As a Software Engineer on Developer Productivity, you’ll identify, develop, and drive investments to improve the velocity and quality of our engineering, as well as bolster the happiness and productivity of other developers. The role spans a spectrum of areas, such as build and software supply-chain systems, platform runtime environments, telemetry relating concurrency, memory/performance optimizations, and monitoring/alerting. Your primary users will be other developers at Palantir. They will be empowered with the software you develop to build capabilities used by research scientists, aerospace engineers, intelligence analysts, and economic forecasters in countries around the world. There will be opportunities to contribute to open source software, including projects maintained by others that we leverage. You’ll work autonomously within a community that will support and challenge you as you grow to become a strong technical contributor and engineering leader. The team is hiring for Frontend and Backend engineers. Core Responsibilities We're hiring engineers who are passionate about solving real-world problems and empowering developers to do their work optimally. If you’re motivated to develop reliable, performant, scalable systems and tools, here are some examples of the types of work you’d get to do: • Define and build standard practices for how services are operated and observed throughout their deployment • Build libraries and tool

javascripttypescriptpython
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F
8mo ago

Modern software runs on open source, and managing the compliance, security, and regulatory complexity that comes with it is one of the biggest problems facing engineering and legal teams today. FOSSA is the platform they use to address these challenges. We help thousands of organizations automate license compliance, prioritize vulnerabilities, generate and operationalize SBOMs, and meet regulatory requirements. Whether it's scanning AI-generated code for IP risks or helping a company through M&A due diligence, FOSSA gives teams the confidence to ship software they trust. FOSSA is a rapidly growing series-B company with a truly distributed team. While our roots are in San Francisco, our growing team has members in several countries across many time zones. We’re always working to find the perfect balance of effective approaches to distributed work, while maintaining the direct personal connections that help us work better together and love our jobs. Your Mission You’re a Sr. Customer Success Engineer that thrives on technical challenges and going deep with customers to help them accomplish their goals. Exceptional work ethic is second nature to you, and you welcome a certain level of ambiguity. You understand that customers are what make a company and are willing and able to bridge the gap, narrow or wide, between customer expectations and what FOSSA delivers today. Simultaneously, you do not hesitate to speak up internally, you constantly seek to identify and improve technical processes and eliminate obstacles. You can be polished and well spoken in front of customers, articulating complex technical situations in a simple and concise manner to non-technical audiences. You can also be “gloves off” and tell the unvarnished truth in the right circumstances. Your technical acumen in helping customers is strong, and you are able to adapt to the different personas that interact with FOSSA (Lawyers / IP Councils, Project Managers and other Intermediaries, Engineer

REMOTEpythonkubernetesai
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D
Datadog
📍 Boston• Full-time• $192K – $240K/yr
1mo ago

Senior Security Engineer, Vulnerability Management Here at Datadog, we think about vulnerability management a little differently. We embrace open source software, recognize our role in the software supply chain, and see attackers weaponizing vulnerabilities faster than ever. We are looking for a Senior Security Engineer who can combine vulnerability-management judgment with hands-on engineering to help us scale and improve our vulnerability lifecycle across Datadog’s multi-cloud products and services. In this role, you will turn ambiguous security problems into clear solutions, and work with engineering teams to address root causes and develop technical controls that reduce vulnerabilities earlier in the SDLC. You’ll use AI and automation to help scale the overall vulnerability lifecycle across Datadog. You will use data and sound technical judgment to prioritize risk, and partner with security, product, platform, and compliance teams to bring scalable solutions into practice. At Datadog, we place value in our office culture - the relationships and collaboration it builds, and the creativity it brings to the table. We operate as a hybrid workplace to ensure our Datadogs can create a work-life harmony that best fits them. What You’ll Do Work across the vulnerability lifecycle from detection and impact assessment through risk-based prioritization, remediation, and verification. Use AI and automation to build tools, services, and workflows that make security ideas concrete, validate them quickly, and create alignment for scalable implementation. Reduce engineering toil through a “PRs, not tickets” approach, using automation to enrich findings, identify ownership, recommend or deliver fixes, and track outcomes. Analyze recurring vulnerabilities and remediation failures to identify root causes and opportunities to prevent issues earlier in the SDLC. Partner with SDLC Security, Product Security, platform teams, and engineering teams to balance technical constraints, busin

pythonjavaai
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M
2mo ago

About Us: AI needs a new infrastructure layer. We're building it at Modal. Every era of computing brought new workloads that previous infrastructure couldn't support: mainframes, databases, and the cloud. Each time, the company that rebuilt the layer underneath defined the decade. AI is no different, except it touches everything instead of one slice, and the window to build the layer underneath it is open right now. Our customers include category-defining companies like Lovable , Ramp , Cognition, DoorDash, and Suno. They rely on Modal for instant GPU access, sub-second container starts, and native storage, so it's simple to serve low-latency inference, fine-tune models, and access production-ready sandboxes at scale. We recently raised a $355M Series C at a $4.65B valuation, led by General Catalyst and Redpoint Ventures. We've crossed $300M+ ARR and grown fivefold since September. Our team includes creators of popular open-source projects (e.g., Seaborn , Luig i ), academic researchers, international olympiad medalists, and experienced engineering and product leaders with decades of experience. The Role: We’re looking for strong engineers with experience building developer tools that users love to work with. Our ideal candidate is someone with a demonstrated drive to build beautiful interfaces that enhance developer productivity. Requirements: 5+ years of experience developing high-quality Python libraries with broad user-bases, ideally including some experience maintaining open-source software. Knowledge of advanced Python features, especially async programming. A strong product sense that manifests as a focus on developer ergonomics and productivity. A high level of customer empathy, good communication skills, and an openness to working directly with our users to help solve their problems. Ability to participate in on-call rotation and respond to production incidents. Ability to work in-person in our NYC or Stockholm office. Any of the following would be a plus:

typescriptpythonai
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A
Anyscale
📍 San Francisco• Full-time• Remote• $170K – $245K/yr
4mo ago

About Anyscale At Anyscale , we're on a mission to democratize distributed computing and make it accessible to software developers of all skill levels. We’re commercializing Ray , a popular open-source project that's creating an ecosystem of libraries for scalable machine learning. Companies like OpenAI , Uber , Spotify , Instacart , Cruise , and many more, have Ray in their tech stacks to accelerate the progress of AI applications out into the real world. With Anyscale, we’re building the best place to run Ray, so that any developer or data scientist can scale an ML application from their laptop to the cluster without needing to be a distributed systems expert. Proud to be backed by Andreessen Horowitz, NEA, and Addition with $250+ million raised to date. About the role As a Distributed LLM Inference Engineer, you will help systems and optimizations that push the boundaries of performance for inference at large scale. This is an incredibly critical role to Anyscale as it allows us to achieve a market leading position for AI infrastructure. As part of this role, you will Iterate very quickly with product teams to ship the end to end solutions for Batch and Online inference at high scale which will be used by open-source Ray users and customers of Anyscale Work across the stack integrating Ray Data and LLM engine providing optimizations achieving low cost solutions for large scale ML inference Integrate with Open source software like vLLM, work closely with the community to adopt these techniques in Anyscale solutions, and also contribute improvements to open source Follow the latest state-of-the-art in the open source and the research community, implementing and extending best practices We'd love to hear from you if you have Familiarity with running ML inference at large scale with high throughput and low latency Familiarity with deep learning and deep learning frameworks (e.g. PyTorch) Solid understanding of distributed systems, ML inference challenges Bonus points

REMOTEmachine learningai
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DU
Defense Unicorns
📍 Minnesota, United States• Remote• $170.9K – $231.2K/yr
3 days ago

Role Description: Being a Product Manager at Defense Unicorns is more than just being part of the sparkliest Product team in defense tech. It means taking radical ownership over real products that make a real impact on real people. At Defense Unicorns, our mission is to make software a strategic deterrent, and our Product Management team clears the path. In this role, you’ll report to the Director of Product and work with teams who deliver outcomes that are critical business enablers and directly support both our missions and other internal teams. This team’s primary responsibility is the creation and maintenance of tooling and pipelines that support UDS application packaging, as well as maintenance of several packages which comprise our core software deliverables. Responsibilities: The listed responsibilities are not exhaustive and additional responsibilities may be assigned based on the evolving needs of the organization. We are seeking a dynamic individual who is able to adapt and take on new responsibilities as they arise. Passion for the intersection of business, open-source software, and national security Participate in and foster open source communities around Defense Unicorns’ open source projects Comfortable owning a product vision end-to-end and being accountable for delivering to several customer segments, including both paid and OSS Managing the expectations and delivery of outcomes of unicorns engineers entrusted to you Establishing and clearly communicating vision and objectives at all levels of the company - from engineers to executives Continuously balance customer, business, and technical priorities with limited resources Synthesizing external customer requests into an internal product roadmap Discipline required to work in a fast-paced, remote environment Keep our Growth and Delivery teams aligned on roadmap and value proposition in order to support product pricing, customer segmentation, and customer needs Experience managi

REMOTEawsazuregcp
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T
1mo ago

Tenstorrent is leading the industry on cutting-edge AI technology, revolutionizing performance expectations, ease of use, and cost efficiency. With AI redefining the computing paradigm, solutions must evolve to unify innovations in software models, compilers, platforms, networking, and semiconductors. Our diverse team of technologists have developed a high performance RISC-V CPU from scratch, and share a passion for AI and a deep desire to build the best AI platform possible. We value collaboration, curiosity, and a commitment to solving hard problems. We are growing our team and looking for contributors of all seniorities. Tenstorrent is building an open future for AI compute. We build RISC-V CPUs, Tensor AI processors, and open-source software that help unlock the next generation of AI innovation. As Cloud Sales Director, you will build the go-to-market motion for neoclouds, serverless inference providers, model-as-a-service platforms, edge networks, and capacity aggregators. You will own this segment from the first customer conversation through production deployment and revenue growth. This is a zero-to-one opportunity with a direct connection to Product, Engineering, Field Applications, and Marketing, and the ability to shape how Tenstorrent reaches a fast-changing cloud market. This role is hybrid, based out of Santa Clara, CA. We welcome candidates at various experience levels for this role. During the interview process, candidates will be assessed for the appropriate level, and offers will align with that level, which may differ from the one in this posting. Who You Are An experienced enterprise cloud seller with a record of building pipeline, developing account strategies, and closing complex opportunities against strategic sales goals. Deeply familiar with neoclouds, cloud consumption models, capacity commitments, and the business drivers shaping AI infrastructure adoption. Technically fluent across modern AI and cloud workloads, including training,

M
MongoDB
📍 British Columbia• Full-time• From C$137K/yr
6mo ago

Our Database Experience (DBX) Team A great MongoDB experience starts with great tools. The Database Experience team builds the libraries and tools that developers use day-to-day working with MongoDB. Our mission is to increase developer adoption, satisfaction and retention by providing a reliable, enjoyable interface for developers and other end-users. Our senior engineers are typically specialists in a particular programming language, but are capable of contributing to projects in other languages as well. For this role, we're looking for someone who will enjoy designing, writing, and supporting open source libraries for the Python ecosystem developers that use MongoDB. This is an opportunity to make a major impact at MongoDB as Python is one of the most popular runtimes for MongoDB users, and our driver has over 3 million daily pypi downloads. You might be right for this role if you... Have substantial experience writing high-quality software in Python Have extensive knowledge in Python tools and frameworks, scientific python and web development frameworks Have practical experience with AI/ML frameworks and technologies in Python, including large language models and agentic tools are a plus Have an interest in learning and staying up-to-date with Python ecosystem trends and best practices and incorporating them into your work Can make pragmatic design decisions, balancing tradeoffs such as usability, maintainability and delivery time Want to, or already do, participate in open source software development and communities, both online via e.g. GitHub and optionally through conferences and speaking engagements Communicate well, internally and externally, both verbally and in writing Enjoy collaborating with teammates, and mentoring junior engineers and interns Are self-motivated, organized, and have strong time management skills You'll be on the team responsible for... Developing and supporting the MongoDB Python drivers and subsidiary libraries ( PyMongo , Django Mon

pythonmongodbaws
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M
MongoDB
📍 United States• Full-time• From $126K/yr
6mo ago

Our Database Experience (DBX) Team A great MongoDB experience starts with great tools. The Database Experience team builds the libraries and tools that developers use day-to-day working with MongoDB. Our mission is to increase developer adoption, satisfaction and retention by providing a reliable, enjoyable interface for developers and other end-users. Our senior engineers are typically specialists in a particular programming language, but are capable of contributing to projects in other languages as well. For this role, we're looking for someone who will enjoy designing, writing, and supporting open source libraries for the Python ecosystem developers that use MongoDB. This is an opportunity to make a major impact at MongoDB as Python is one of the most popular runtimes for MongoDB users, and our driver has over 3 million daily pypi downloads. You might be right for this role if you... Have substantial experience writing high-quality software in Python Have extensive knowledge in Python tools and frameworks, scientific python and web development frameworks Have practical experience with AI/ML frameworks and technologies in Python, including large language models and agentic tools are a plus Have an interest in learning and staying up-to-date with Python ecosystem trends and best practices and incorporating them into your work Can make pragmatic design decisions, balancing tradeoffs such as usability, maintainability and delivery time Want to, or already do, participate in open source software development and communities, both online via e.g. GitHub and optionally through conferences and speaking engagements Communicate well, internally and externally, both verbally and in writing Enjoy collaborating with teammates, and mentoring junior engineers and interns Are self-motivated, organized, and have strong time management skills You'll be on the team responsible for... Developing and supporting the MongoDB Python drivers and subsidiary libraries ( PyMongo , Django Mon

pythonmongodbaws
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G
10 days ago

GitLab is the intelligent orchestration platform for DevSecOps. GitLab enables organizations to increase developer productivity, improve operational efficiency, reduce security and compliance risk, and accelerate digital transformation. More than 50 million registered users and more than 50% of the Fortune 100* trust GitLab to ship better, more secure software faster. The same principles built into our products are reflected in how our team works: we embrace AI as a core productivity multiplier, with all team members expected to incorporate AI into their daily workflows to drive efficiency, innovation, and impact. GitLab is where careers accelerate, innovation flourishes, and every voice is valued. Our high-performance culture is driven by our values and continuous knowledge exchange, enabling our team members to reach their full potential while collaborating with industry leaders to solve complex problems. Co-create the future with us as we build technology that transforms how the world develops software. * Fortune 500® is a registered trademark of Fortune Media IP Limited, used under license. Claim based on GitLab data. Fortune 100 refers to the top 20% ranked companies in the 2025 Fortune 500 list, published in June 2025. Fortune and Fortune Media IP Limited are not affiliated with, and do not endorse products or services of GitLab. An overview of this role As the Director of Regional Sales for France, you'll take ownership of building and leading our Italian sales presence. You'll drive revenue growth, implement disciplined sales processes and technology, and partner across account management, customer success, marketing, product, engineering, and operations to deliver exceptional customer experiences. You'll report to the VP of Sales and balance hands-on field leadership with strategic vision. You'll stay close to key accounts, develop your sales team, and expand our client base. In this role, you'll be passionate about open source software, drive repeatab

REMOTEaisalesforcerecruitment
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About Ubiquiti At Ubiquiti Inc., we create technology platforms for Businesses, Smart Homes, and Internet Service Providers, driven by our goal to connect everyone, everywhere. To date, Ubiquiti has shipped over 100 million devices worldwide, from ISP networking products to next generation of IT solutions. Our growth is made possible by the dedicated team of hundreds behind the scenes. From software developers and product managers to designers and strategists, Team UI is driven to achieve our common goal: Rethinking IT. At Ubiquiti, you’ll heighten your potential and broaden your horizons - all while shaping the future of connectivity. The Position: The Ubiquiti Kaunas office is looking for a talented and self-driven embedded C/C++ developer. We expect you to bring your experience, enthusiasm and creativity wherever you go and put them in the work you do. You should be able to think out of the box when finding solutions to brand new problems and make things work when the solution is not straightforward. Responsibilities: Develop embedded Linux firmware for managed Ethernet switches and related networking products; Collaborate with global firmware, hardware, and product teams throughout product design, bring-up, development, and release; Develop and maintain Linux user-space services, management daemons, platform libraries, and hardware abstraction components; Implement and maintain Layer 2 and Layer 3 switching functionality, including VLANs, STP/RSTP/MSTP, LACP, LLDP, multicast, and routing features; Integrate switching silicon SDKs, platform components, and third-party open-source software into the firmware; Improve switching performance, reliability, startup time, resource usage, and system observability; Work with hardware engineers on board bring-up, BSP integration, hardware validation, and low-level issue investigation; Diagnose complex control-plane and data-plane issues using logs, packet captures, hardware counters, tracing, and profiling tools

gitlinuxai
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Cloud Platform Administrator (Mid-Level, Senior or Lead) **Sign on Bonus Potential** Company: The Boeing Company The Boeing Company’s Specialized United States Infrastructure Operations is currently seeking a Cloud Platform Administrator (Mid-Level, Senior or Lead) to join the team in Berkeley, MO; Seattle, WA; or Daytona Beach, FL . The Infrastructure team is seeking a skilled platform engineer to help build and operate the cloud platform services that host critical enterprise applications and software toolchains. In this role, the selected candidate will focus on the shared platform capabilities that enable teams to deploy, run, and maintain containerized and cloud-hosted solutions in a consistent and supportable manner. As both an individual contributor and technical leader, this position will help define and implement platform standards for Kubernetes, container hosting, deployment automation, configuration management, and operational support. This role is focused on platform reliability, repeatability, scalability, and service enablement, rather than custom application software development. Position Responsibilities: Design, implement, and maintain cloud platform services supporting Kubernetes, containers, ingress, storage integration, secrets management, and service connectivity Build and sustain reusable deployment patterns for Commercial-Off-The-Shelf (COTS), Open Source Software (OSS), and internally customized applications Develop and maintain automation for platform provisioning, upgrades, patching, and lifecycle support Manage cluster lifecycle activities including: Cluster upgrades Node management <

awsazuredocker
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C
Coder
📍 United Kingdom• Full-time• Remote• £116K – £157K/yr
1mo ago

As Senior Corporate Counsel, you’ll help Coder move commercial agreements from the first redline to signature with clarity and good judgment. You’ll partner closely with Sales, Deal Desk, and Finance to negotiate contracts that support the business while managing legal risk. You’ll lead negotiations across our commercial agreements and help teammates work through legal questions as deals progress. You’ll bring practical guidance, clear communication, and a strong understanding of how in-house legal teams support growing businesses. What you’ll do here Draft, review, and negotiate commercial contracts with customers and business partners. Partner closely with Sales and Deal Desk throughout the contracting process. Work with Finance and other internal stakeholders to resolve commercial and contractual issues. Provide practical legal guidance that balances business goals with appropriate risk management. Help move negotiations forward by identifying issues, explaining tradeoffs, and finding workable solutions. Support consistent, efficient contracting practices as Coder grows. What we’re looking for 6+ years of legal experience, including significant in-house experience negotiating commercial software licensing contracts. A JD from an accredited law school. Qualified solicitor in England & Wales with a current practicing certificate, or otherwise qualified and in good standing to practice law in another relevant jurisdiction Strong commercial judgment and experience working directly with business stakeholders. Clear, concise written and verbal communication skills. The ability to manage multiple negotiations and priorities while maintaining attention to detail. A practical approach to legal advice, with the judgment to distinguish material risks from issues that should not slow a deal down. Bonus tacos if you have (Tacos? If you need an ice-breaker, ask how we say thanks by giving tacos!) Experience working with open source software or open source licensing. About

REMOTEaifinancerecruitment
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C
Cohere
📍 San Francisco• Full-time• From £275K/yr
3mo ago

Who are we? Cohere is the leading security-first enterprise AI company. We build cutting-edge foundation AI models and end-to-end products that are designed to solve real-world business problems. We’re training and deploying frontier models for enterprises who are building AI systems. We believe that our work is instrumental to the widespread adoption of AI and we are looking for folks that want to be part of that. We obsess over what we build. Each one of us is responsible for contributing to increasing the capabilities of our models and the value they drive for our customers. Cohere is a team of researchers, engineers, designers, and more, who are all passionate about their craft. We are a global technology company headquartered in Toronto with key offices in London, New York City, San Francisco, Montreal, Paris, Berlin and Seoul. Join us! Why this Role? Join our team as Senior Counsel, Product and Technology to shape the legal framework for our product development and commercialization. This position offers the exciting opportunity to work at the intersection of technology innovation, intellectual property strategy, and business development, providing critical guidance that enables our products to reach market efficiently while managing legal risks. The ideal candidate is an experienced technology lawyer who thrives in fast-paced environments and wants to make a direct impact on product success. As a member of our Legal Team, you will: Create standardized templates, playbooks, and guidelines for product contract terms to improve efficiency and consistency, and ensure alignment with product capabilities. Provide strategic guidance on and manage intellectual property risks across Cohere’s product portfolio, including open source software (OSS) compliance and third-party software integration. Identify and mitigate legal risks throughout the product lifecycle, working closely with product regulatory and commercial counsel to manage regulatory compliance, liability ex

gitrestai
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