Senior Lead Python Jobs

About Us At Cloudflare, we are on a mission to help build a better Internet. Today the company runs one of the world’s largest networks that powers millions of websites and other Internet properties for customers ranging from individual bloggers to SMBs to Fortune 500 companies. Cloudflare protects and accelerates any Internet application online without adding hardware, installing software, or changing a line of code. Internet properties powered by Cloudflare all have web traffic routed through its intelligent global network, which gets smarter with every request. As a result, they see significant improvement in performance and a decrease in spam and other attacks. Cloudflare was named to Entrepreneur Magazine’s Top Company Cultures list and ranked among the World’s Most Innovative Companies by Fast Company. At Cloudflare, we’re not looking for people who wait for a polished roadmap; we’re looking for the builders who see the cracks in the Internet that everyone else has simply learned to live with. We value candidates who have the instinct to spot a "normalized" problem and the AI-native curiosity to create a solution using the latest tools. Our culture is built on iteration, leveraging AI to ship faster today to make it better tomorrow, while ensuring that every improvement, no matter how small, is shared across the team to lift everyone up. If you’re the type of person who values curiosity over bureaucracy, and that AI is a partner in solving tough problems to keep the Internet moving forward, you’ll fit right in. Location(s): USA About the Role and What You’ll Do Cloudflare is looking for a leader to manage our Cloudflare One Go-to-Market (GTM) Specialist team across the United States, Canada, and Latin America. Cloudflare One unifies Zero Trust security and networking to protect users, devices, applications, and networks. As customers evolve toward agentic enterprises, it extends that security fabric to govern workforce AI usage, protect sensitive data, a

Every day, tens of millions of people come to Roblox to explore, create, play, learn, and connect with friends in 3D immersive digital experiences– all created by our global community of developers and creators. At Roblox, we’re building the tools and platform that empower our community to bring any experience that they can imagine to life. Our vision is to reimagine the way people come together, from anywhere in the world, and on any device. We’re on a mission to connect a billion people with optimism and civility, and looking for amazing talent to help us get there. A career at Roblox means you’ll be working to shape the future of human interaction, solving unique technical challenges at scale, and helping to create safer, more civil shared experiences for everyone. About the role: Avatars are core to our mission and everyday, millions of people come to Marketplace or other avatar shopping experiences to discover and shop for creations that help them express their individuality. They dress and play with their avatar as they connect with friends across thousands of immersive digital experiences. Powering the creativity of our Marketplace is our community of creators and developers who are building businesses and establishing their brand by selling creations. These creators range from individuals to small businesses to large brands, all of which are attracted to the Roblox platform, community and offerings. Our Marketplace is a critical component of Roblox’s economy, accounting for a third of economic activity on the platform. As a Senior Product Manager responsible for Avatar creators, you will have a front seat at shaping the future of the Marketplace and what it means to build an economy powered by our community. You will: Be responsible for building and shipping creator driven products that unlock more expression on the platform Have ownership of our UGC creator ecosystem, decide which new categories we should build, man

Zscaler (NASDAQ: ZS) accelerates digital transformation so customers can be more agile, efficient, resilient, and secure. The Zscaler Zero Trust Exchange platform protects thousands of customers from cyberattacks and data loss by securely connecting users, devices, and applications in any location. Distributed across 200+ public data centers globally and thousands of private sites at the edge, the SASE-based Zero Trust Exchange is the world’s largest in-line cloud security platform. We believe the future of work is Human + AI and are building an AI-native enterprise where human potential is amplified by machine intelligence to solve the world’s hardest security challenges. Driven by deep customer obsession, we are committed to the mission, outcome, and to each other. We bring these commitments to life through three core behaviors: ownership and collaboration, trust through outcomes and impact, and a challenge culture with ongoing feedback. Ready to make an impact at the company pioneering security transformation in the AI era? Join us at Zscaler. Role We are looking for a Senior Product Support Engineer to join our team. This is a Remote role reporting to the Director, Product Support. As part of our global Customer Success Organization, you will be dedicated to delivering high-impact experiences and identifying innovative solutions for our customers. You will leverage data and research to provide expert, hands-on support, ensuring clients achieve their goals and utilize our technology to its fullest potential. What you’ll do (Role Expectations) Provide second line consultation to independently debug complex security and network problems Partner with Engineering to assist customers with testing, troubleshooting, and reproducing issues to verify problems Document incident resolutions in technical databases and provide direct feedback to Engineering and Operations teams Develop department training programs and mentor engineers on advanced troubleshooting and ca

Toast creates technology to help restaurants and local businesses succeed in a digital world, helping business owners operate, increase sales, engage customers, and keep employees happy. Outside the US, we currently operate in Canada, UK, Ireland, and Australia and are actively growing our product platform in these markets. Specifically we are investing in a new team to support our customers in improving labour management. This is a key customer request and includes earned wage access, tip/gratuity management, and payroll tools. We are seeking a senior product manager to own this strategy and enable our customers to attract and retain employees in their restaurants. You will work closely with engineering, business development, operations, and marketing partners to deliver innovative, reliable, and scalable capabilities that help our customers with the most important but also complex part of their business. In this highly visible role, you will have a direct impact on how Toast serves customers in new markets A day in the life (Responsibilities) Champion field research & validation: Spend time with customers in all markets to learn opportunities to improve the experience both as a restaurant employee and as a restaurant managing labour. Form a perspective on build versus partner. Define, prioritize, and deliver a roadmap initiatives that improve the value proposition of Toast by supporting critical labour operational workflows Align Engineering, Security, Data, Research, Design, Care/Onboarding, and GTM partners to de-risk delivery and adoption of new features in the employee management space. Define and track key metrics and KPIs to measure ROI of roadmap initiatives and prioritize projects across markets. Define pricing, packaging, and go-to-market strategy with Product Marketing, Sales, and Operations; identify commercial models that fit restaurants of different sizes. What you'll need to thrive (Requirements) ~5+ years shipping compl

Toast creates technology to help restaurants and local businesses succeed in a digital world, helping business owners operate, increase sales, engage customers, and keep employees happy. Outside the US, we currently operate in Canada, UK, Ireland, and Australia and are actively growing our product platform in these markets. Specifically we are investing in a new team to support our customers in improving labour management. This is a key customer request and includes earned wage access, tip/gratuity management, and payroll tools. We are seeking a senior product manager to own this strategy and enable our customers to attract and retain employees in their restaurants. You will work closely with engineering, business development, operations, and marketing partners to deliver innovative, reliable, and scalable capabilities that help our customers with the most important but also complex part of their business. In this highly visible role, you will have a direct impact on how Toast serves customers in new markets A day in the life (Responsibilities) Champion field research & validation: Spend time with customers in all markets to learn opportunities to improve the experience both as a restaurant employee and as a restaurant managing labour. Form a perspective on build versus partner. Define, prioritize, and deliver a roadmap initiatives that improve the value proposition of Toast by supporting critical labour operational workflows Align Engineering, Security, Data, Research, Design, Care/Onboarding, and GTM partners to de-risk delivery and adoption of new features in the employee management space. Define and track key metrics and KPIs to measure ROI of roadmap initiatives and prioritize projects across markets. Define pricing, packaging, and go-to-market strategy with Product Marketing, Sales, and Operations; identify commercial models that fit restaurants of different sizes. What you'll need to thrive (Requirements) ~5+ years shipping compl

OKX will be prioritising applicants who have a current right to work in Singapore, and do not require OKX's sponsorship of a visa Who We Are At OKX, we believe that the future will be reshaped by crypto, and ultimately contribute to every individual's freedom. OKX is a leading crypto exchange, and the developer of OKX Wallet, giving millions access to crypto trading and decentralized crypto applications (dApps). OKX is also a trusted brand by hundreds of large institutions seeking access to crypto markets. We are safe and reliable, backed by our Proof of Reserves. Across our multiple offices globally, we are united by our core principles: We Before Me , Do the Right Thing , and Get Things Done . These shared values drive our culture, shape our processes, and foster a friendly, rewarding, and diverse environment for every OK-er. OKX is part of OKG, a group that brings the value of Blockchain to users around the world, through our leading products OKX, OKX Wallet, OKLink and more. About the Opportunity We are looking for a seasoned backend engineer to design, build, and scale the backend systems powering OKX’s DEX trading products. You will own critical parts of the trading lifecycle—from quote discovery and order management to transaction submission, execution tracking, and reconciliation. Working closely with product, frontend, smart contract, and infrastructure teams, you will deliver secure, reliable trading experiences across multiple blockchain ecosystems. This is a hands-on engineering role with meaningful architectural ownership and opportunities to grow into technical leadership. What You’ll Be Doing Design and develop backend services for quote aggregation, order management, transaction orchestration, and execution tracking. Build reliable integrations with DEX protocols, liquidity sources, blockchain RPC providers, and indexing services. Define clear order and transaction state models, with robust handling of retries, duplicate re

About Us At Cloudflare, we are on a mission to help build a better Internet. Today the company runs one of the world’s largest networks that powers millions of websites and other Internet properties for customers ranging from individual bloggers to SMBs to Fortune 500 companies. Cloudflare protects and accelerates any Internet application online without adding hardware, installing software, or changing a line of code. Internet properties powered by Cloudflare all have web traffic routed through its intelligent global network, which gets smarter with every request. As a result, they see significant improvement in performance and a decrease in spam and other attacks. Cloudflare was named to Entrepreneur Magazine’s Top Company Cultures list and ranked among the World’s Most Innovative Companies by Fast Company. At Cloudflare, we’re not looking for people who wait for a polished roadmap; we’re looking for the builders who see the cracks in the Internet that everyone else has simply learned to live with. We value candidates who have the instinct to spot a "normalized" problem and the AI-native curiosity to create a solution using the latest tools. Our culture is built on iteration, leveraging AI to ship faster today to make it better tomorrow, while ensuring that every improvement, no matter how small, is shared across the team to lift everyone up. If you’re the type of person who values curiosity over bureaucracy, and that AI is a partner in solving tough problems to keep the Internet moving forward, you’ll fit right in. Available Locations: Austin TX, San Francisco CA, NYC, Atlanta GA OR Denver CO About the role The GTM Intelligence team helps Cloudflare's go-to-market organization make faster, better decisions with trusted data. We work with Sales, Technical Sales, Services, Finance, and our central Data teams to make sure the people who sell, deploy, and support Cloudflare get consistent, reliable answers to the questions that matter most. We're looking for a Senior

About Pleo Messy spend management is tricky business. And tedious processes are a lose-lose situation for all involved, not just finance. At Pleo, we're changing that. We build spend solutions that make managing money seamless, empowering, and surprisingly effective for finance teams and employees alike - with a vision to help all businesses ‘go beyond’. The word ‘Pleo’ actually means ‘more than you’d expect’, and living by that mantra has been the secret to our success over the last 10 years. Now, we’re at a pivotal moment in our journey; every move we make has a direct impact on our 40,000+ customers, our business, and our collective success. We need people who take pride in uncovering customer needs, who turn complex problems into simple solutions, challenge the way things are done (respectfully), and always aim high. With great ambitions driving us forward, we can’t say we’ve got this whole thing figured out. And frankly, that’s half the fun! What we can say is that we’re a driven, progressive, and, importantly, a kind bunch of 850+ people from over 100 nationalities, all committed to delivering the future of business spending, together. About the role We're looking for a Senior Customer Success Manager to join our Customer Experience team at Pleo. In this role, you'll help our high-touch, Mid Market customers achieve success and maximise the value of Pleo’s solutions and be part of a dynamic and collaborative team as we scale our innovative expense management platform across the UK & Ireland If you're excited about solving customer challenges, and driving growth through exceptional service and are passionate about Customer Success in the SaaS industry, then this is the opportunity for you! Who you’ll be working with and reporting to You’ll report to our Director of CX and work closely with teams in CX, Onboarding, AM, Sales and Product. Our team of 30 is highly collaborative and dedicated to Customer Experience. What you’ll be doing As a Senior Customer Suc

About Us At Cloudflare, we are on a mission to help build a better Internet. Today the company runs one of the world’s largest networks that powers millions of websites and other Internet properties for customers ranging from individual bloggers to SMBs to Fortune 500 companies. Cloudflare protects and accelerates any Internet application online without adding hardware, installing software, or changing a line of code. Internet properties powered by Cloudflare all have web traffic routed through its intelligent global network, which gets smarter with every request. As a result, they see significant improvement in performance and a decrease in spam and other attacks. Cloudflare was named to Entrepreneur Magazine’s Top Company Cultures list and ranked among the World’s Most Innovative Companies by Fast Company. At Cloudflare, we’re not looking for people who wait for a polished roadmap; we’re looking for the builders who see the cracks in the Internet that everyone else has simply learned to live with. We value candidates who have the instinct to spot a "normalized" problem and the AI-native curiosity to create a solution using the latest tools. Our culture is built on iteration, leveraging AI to ship faster today to make it better tomorrow, while ensuring that every improvement, no matter how small, is shared across the team to lift everyone up. If you’re the type of person who values curiosity over bureaucracy, and that AI is a partner in solving tough problems to keep the Internet moving forward, you’ll fit right in. Available Locations New York City About the Role Account Executives, Channel Account Managers, Business Development Representatives, Solution Engineers, Customer Success, and Sales Operations - all working together help our customers adopt Cloudflare and create great Internet-enabled experiences. The sales team at Cloudflare helps customers solve real, technical problems while creating the revenue streams that help the company provide free service to mi

📍 Location: Athens, Greece 🏢 Weekly office requirement: Hybrid, 1 day/week, or fully remote 💼 Employment type: Permanent 🪜 Seniority level: Mid-Senior 🌐 Language: All stages of the recruitment process will be conducted in English At GWI we’re always looking for extraordinary people who thrive on making an extraordinary impact. Right now we’re looking for a Senior Security Engineer to play a key role in our Security team in Athens . If that’s you, and making a difference gets you out of bed in the morning, keep reading. It could be the start of something, well, extraordinary. As our Senior Security Engineer you’ll help keep our platform and our customers’ data safe by watching our security tooling closely and acting on what it tells us, as we work towards ISO certification. You’ll join a small security team where you can take initiative and potentially own projects from start to finish. Sounds great, what will I be doing? 🤔 👉 Monitor and triage alerts and logs across our security tools, and take operational action on findings rather than waiting for direction. 👉 Track vulnerabilities end to end, keeping clear records of actions, owners and deadlines across teams. 👉 Help produce the operational evidence for our ISO certification by documenting what we monitor and what we do about it. 👉 Drive decisions on alerts, including web application firewall alerts, working with IT, DevOps, Engineering and Legal. 👉 Contribute to team initiatives, including automating repetitive security work. What do I need to bring with me? 🧳 You’ll need to be able to demonstrate the core skills this role requires. You don’t have to tick all the boxes right away; the important thing is that you’re willing to learn. Here’s what the team will be looking for in you: 👉 Computer Science background: A degree in Computer Science or equivalent practical experience. 👉 Security experience: 4+ years of hands-on experience in security. 👉 Code literacy: You can read code and write scripts to i

As a Senior Quality Engineer (Test Automation), you play a key role in ensuring the quality of our products and development processes. You help teams deliver reliable software by promoting quality-first engineering practices, designing maintainable automation solutions, coaching colleagues, and driving continuous improvement across the software development lifecycle. You combine deep technical expertise in test automation with a strong quality mindset. You look beyond finding defects and focus on preventing them by improving processes, tooling, collaboration, and engineering practices. You'll join our Quality Engineering team, which builds quality into the product from the start rather than inspecting it at the end, enabling sustainable delivery of high-quality software through automation, collaboration, coaching, and continuous improvement. You are responsible for: Developing and maintaining reliable automated tests using Playwright and TypeScript, and reviewing automation code to raise quality standards. Eliminating flaky tests and unstable environments to improve suite stability and execution speed. Promoting a quality-first mindset by shifting quality earlier and focusing on meaningful quality over test quantity. Coaching colleagues and sharing knowledge to strengthen collaboration and advocate best practices across teams. Challenging existing ways of working and implementing improvements that enhance product quality and processes. Communicating quality topics clearly across the software development lifecycle.

This is Adyen At Adyen, we’re engineered for ambition. We empower our teams with the culture and support they need to own their careers. The people of Adyen are motivated problem-solvers who tackle unique technical challenges at scale, delivering innovative and ethical solutions to help businesses achieve their ambitions faster. For our teams, we create an environment with opportunities for our people to succeed, backed by the culture and support to ensure they are enabled to truly own their careers. We are motivated individuals who tackle unique technical challenges at scale and solve them as a team. Together, we deliver innovative and ethical solutions that help businesses achieve their ambitions faster. Senior Machine Learning Engineer Adyen is looking for a Senior Machine Learning Engineer to join our Anti-Money Laundering team in Amsterdam, someone with experience of building and operating robust machine learning systems at scale in production environments. The Anti-Money Laundering team processes a massive transaction volume (over 800B euro in H1 2026) to detect complex financial crime and cover a wide range of customer risks. We currently run a hybrid stack of business rules and machine learning models, with a clear mission to systematically reduce our dependence on static rules and transition to a modern, model-first detection engine. In this role, you will: Develop and maintain production ML pipelines for data ingestion, training, validation, and deployment Help us upgrade an existing rules-heavy system to a modern automated AI/ML engine Collaborate with data engineers and data analysts to develop best in class Fintech models Collaborate with operations and compliance teams to ensure Adyen’s models operate worldwide without a hitch Tackle difficult technical challenges like extreme class imbalance and incomplete ground truth Support and encourage good engineering practices Who You Are: You have 7+ years of experience as an engineer working in th

This is Adyen At Adyen, we’re engineered for ambition. We empower our teams with the culture and support they need to own their careers. The people of Adyen are motivated problem-solvers who tackle unique technical challenges at scale, delivering innovative and ethical solutions to help businesses achieve their ambitions faster. For our teams, we create an environment with opportunities for our people to succeed, backed by the culture and support to ensure they are enabled to truly own their careers. We are motivated individuals who tackle unique technical challenges at scale and solve them as a team. Together, we deliver innovative and ethical solutions that help businesses achieve their ambitions faster. Senior Machine Learning Engineer Adyen is looking for a Senior Machine Learning Engineer to join our team in Amsterdam, someone with experience of building and operating robust machine learning systems at scale in production environments. You will be responsible for designing, productionizing and maintaining machine learning services that power data products at Adyen. Teams Currently Hiring: Optimise: Optimize Intelligence at Adyen is a specialized team of Machine Learning Scientists and Data Analysts focused on maximizing transaction success, minimizing transaction costs, and driving payment performance at a global scale. We build and scale advanced ML/DL solutions that operate over massive, complex decision spaces, determining the optimal path for every single transaction in real time. Our systems evaluate high-dimensional data streams to dynamically select the optimal authentication methods, apply smart payment message optimizations, and orchestrate intelligent transaction routing. Our models live-score millions of daily transactions, balancing coupled cost and performance objectives simultaneously. If you are passionate about solving intricate combinatorial challenges and pushing the boundaries of adaptive decision-making systems, join us in shaping the future

Zscaler (NASDAQ: ZS) accelerates digital transformation so customers can be more agile, efficient, resilient, and secure. The Zscaler Zero Trust Exchange platform protects thousands of customers from cyberattacks and data loss by securely connecting users, devices, and applications in any location. Distributed across 200+ public data centers globally and thousands of private sites at the edge, the SASE-based Zero Trust Exchange is the world’s largest in-line cloud security platform. We believe the future of work is Human + AI and are building an AI-native enterprise where human potential is amplified by machine intelligence to solve the world’s hardest security challenges. Driven by deep customer obsession, we are committed to the mission, outcome, and to each other. We bring these commitments to life through three core behaviors: ownership and collaboration, trust through outcomes and impact, and a challenge culture with ongoing feedback. Ready to make an impact at the company pioneering security transformation in the AI era? Join us at Zscaler. Role We are looking for a Senior BizOps Analyst - Product Operations to join our team. This is a hybrid role, reporting to the Director, Product Revenue in the Product Operations department. In this fast-paced, high-impact individual contributor role, you will combine strong business acumen with SQL, Python, data modeling, dashboards, custom data applications, and AI-enabled workflows. You will help Product Operations turn ambiguous business problems into clear signals, scalable analytics, decision workflows, and practical tools that improve how teams operate. What you’ll do (Role Expectations) Partner with Product leadership to clarify high-priority business questions and define the signals, dashboards, workflows, or AI agents needed to accelerate product and operational decision-making Own the Product Operations signals repository as the single source of truth for business logic, data inputs, definitions, own

Senior Machine Learning Engineers at Thoughtworks build, maintain and test the architecture and infrastructure for managing machine learning applications. They are involved in supporting and contributing to the design of the end-to-end applications and products. They are responsible for building core capabilities including technical and functional machine learning systems and applications, being the anchor for functional streams of work and are accountable for timely delivery. As a senior machine learning engineer, you will work on the latest tools, frameworks and offerings while also being involved in enabling credible and collaborative problem solving to execute on a strategy. Due to the nature of the projects and specific client security clearance, this role requires the successful candidate to be a Singapore Citizen or PR of Singapore. Job responsibilities You will contribute to design and drive the development of robust scalable architectures and infrastructure for deploying and managing machine learning (ML) applications, ensuring high availability, performance and security You will collaborate with data scientists and engineers to translate business needs into effective and efficient ML systems and applications You will own the development and maintenance of core functionalities within ML applications, including ML pipelines, model training and deployment, and monitoring and evaluation You will drive the functional stream of work by providing technical expertise, handling team discussions and ensuring timely delivery of assigned tasks You will stay ahead of the curve by actively exploring and implementing the latest tools, frameworks and offerings in the ML landscape You will facilitate collaborative problem solving within the team by actively listening, communicating effectively and mentoring other engineers You will contribute to the development and execution of the team's overall ML strategy, aligning technical capabilities with business objectives You wil