Senior Lead Java Full Stack Developer Jobs

Who are we? FalconX is a pioneering team of operators, investors, and builders committed to revolutionizing institutional access to the crypto markets. Operating at the intersection of traditional finance and cutting-edge technology, FalconX addresses the industry's foremost challenges: Navigating the digital asset market can be complex and fragmented, with limited products and services that support trading strategies, structures, and liquidity found in conventional financial markets. As a comprehensive solution for all digital asset strategies from start to scale, FalconX operates as the connective tissue empowering clients with seamless navigation through the ever- evolving cryptocurrency landscape. The Role We’re looking for a Senior Trading Systems Developer with strong experience in low-latency Rust and/or Java to architect and build our electronic trading execution platform. This platform will be central to supporting complex electronic trading algos, such as automated market making on exchanges and quant trading strategies. You will work on the core components that sit on the hot path of our execution stack — including market-data ingestion, order management, risk checks, session control, and high-throughput venue connectivity. You’ll be designing and developing scalable, low-latency components that are resilient under heavy load and tightly integrated with our execution stack and internal trading infrastructure. What You’ll Do Build scalable services using Rust and Java, optimized for latency and throughput. Responsible for development of low latency services on Aeron, including OMS/EMS components, market-data pipelines, and venue gateway connectivity. Integrate with exchange APIs using FIX, REST, WebSocket, and venue-specific protocols. Model complex order lifecycles, state machines, and execution workflows into resilient, observable, fault-tolerant services. Design and maintain SBE message schemas and high-throughput message-bus communication o

At Kailera, we are bold, authentic and committed to our mission of developing therapies that give people the power to transform their lives and elevate their overall health. Rooted in an entrepreneurial spirit and a team-oriented culture, we are working together to advance Kailera’s mission to advance novel therapies for obesity and related conditions. We are passionate about creating an inclusive workplace that promotes collaboration, integrity, and excellence. As we expand, we seek the most talented individuals with diverse backgrounds, cultures, perspectives, and experiences to join our team. What You’ll Do: The Senior Scientist, Analytical Development and Quality Control will support analytical development and quality control activities performed by our external partners for cGMP manufacturing, quality release, and stability. The Senior Scientist will work directly with technical counterparts at vendor sites to implement the required product controls and ensure the integrity of data generated by our external partners. This role will also provide critical support for regulatory filings and ensure compliance with global regulatory standards. Required location: Waltham, MA (hub-based, onsite 3-4 days per week) Responsibilities: Participate in the assessment and selection of Contract Development and Manufacturing Organizations (CDMOs) Oversee analytical activities conducted by these CDMOs to ensure external partners fulfill technical needs and quality standards Perform detailed review and provide data integrity oversight of data generated at CDMOs Ensure appropriate methods are developed and implemented for drug substance and drug product based on identified critical quality attributes Provide oversight of phase-appropriate method validation activities in alignment with current regulatory requirements Oversee stability programs to support product retest, shelf-life, and expiration dating Contribute to the preparation of data summaries and report

We're transforming the grocery industry At Instacart, we invite the world to share love through food because we believe everyone should have access to the food they love and more time to enjoy it together. Where others see a simple need for grocery delivery, we see exciting complexity and endless opportunity to serve the varied needs of our community. We work to deliver an essential service that customers rely on to get their groceries and household goods, while also offering safe and flexible earnings opportunities to Instacart Personal Shoppers. Instacart has become a lifeline for millions of people, and we’re building the team to help push our shopping cart forward. If you’re ready to do the best work of your life, come join our table. Instacart is a Flex First team There’s no one-size fits all approach to how we do our best work. Our employees have the flexibility to choose where they do their best work—whether it’s from home, an office, or your favorite coffee shop—while staying connected and building community through regular in-person events. Learn more about our flexible approach to where we work. Overview We are seeking a Senior Product Manager to own the vision, strategy, and execution for Order Quality. This role sits at the intersection of shopper and customer experiences, working to improve item discovery and replacement workflows while ensuring customers can easily communicate their preferences. Fulfillment Order Quality is a critical driver of customer satisfaction and retailer trust at Instacart. You will define and deliver a roadmap that enables reliable fulfillment for our customers and retailers and efficient picking experiences for our shoppers. You will partner closely with a dedicated team of engineers, designers, and data scientists, collaborating across the organization to drive aligned priorities. About the Job This is an exciting opportunity to define the shopper and customers flows using cutting edge AI and LLM technologies. Own the

We're transforming the grocery industry At Instacart, we invite the world to share love through food because we believe everyone should have access to the food they love and more time to enjoy it together. Where others see a simple need for grocery delivery, we see exciting complexity and endless opportunity to serve the varied needs of our community. We work to deliver an essential service that customers rely on to get their groceries and household goods, while also offering safe and flexible earnings opportunities to Instacart Personal Shoppers. Instacart has become a lifeline for millions of people, and we’re building the team to help push our shopping cart forward. If you’re ready to do the best work of your life, come join our table. Instacart is a Flex First team There’s no one-size fits all approach to how we do our best work. Our employees have the flexibility to choose where they do their best work—whether it’s from home, an office, or your favorite coffee shop—while staying connected and building community through regular in-person events. Learn more about our flexible approach to where we work. Overview We are seeking a Senior Product Manager to own the vision, strategy, and execution for Order Quality. This role sits at the intersection of shopper and customer experiences, working to improve item discovery and replacement workflows while ensuring customers can easily communicate their preferences. Fulfillment Order Quality is a critical driver of customer satisfaction and retailer trust at Instacart. You will define and deliver a roadmap that enables reliable fulfillment for our customers and retailers and efficient picking experiences for our shoppers. You will partner closely with a dedicated team of engineers, designers, and data scientists, collaborating across the organization to drive aligned priorities. About the Job This is an exciting opportunity to define the shopper and customers flows using cutting edge AI and LLM technologies. Own the

We're transforming the grocery industry At Instacart, we invite the world to share love through food because we believe everyone should have access to the food they love and more time to enjoy it together. Where others see a simple need for grocery delivery, we see exciting complexity and endless opportunity to serve the varied needs of our community. We work to deliver an essential service that customers rely on to get their groceries and household goods, while also offering safe and flexible earnings opportunities to Instacart Personal Shoppers. Instacart has become a lifeline for millions of people, and we’re building the team to help push our shopping cart forward. If you’re ready to do the best work of your life, come join our table. Instacart is a Flex First team There’s no one-size fits all approach to how we do our best work. Our employees have the flexibility to choose where they do their best work—whether it’s from home, an office, or your favorite coffee shop—while staying connected and building community through regular in-person events. Learn more about our flexible approach to where we work. Overview About the Role This role sits at the center of one of our most important Enterprise product bets: giving retailers significantly more control over how they differentiate and extend their digital experiences. The PM will define how retailers move beyond standard configurations to create experiences that feel truly their own, using a combination of AI-assisted customization, extensibility, and integrations. This is a highly ambiguous problem space with limited precedent, significant latitude to set the vision, and regular visibility with senior executives. The right person will bring exceptional product judgment, very high throughput decision making, and strong technical acumen. They will be able to partner deeply with senior engineers, align a complex group of stakeholders around a long-term vision and challenge conventional approaches when necessary. The r

We're transforming the grocery industry At Instacart, we invite the world to share love through food because we believe everyone should have access to the food they love and more time to enjoy it together. Where others see a simple need for grocery delivery, we see exciting complexity and endless opportunity to serve the varied needs of our community. We work to deliver an essential service that customers rely on to get their groceries and household goods, while also offering safe and flexible earnings opportunities to Instacart Personal Shoppers. Instacart has become a lifeline for millions of people, and we’re building the team to help push our shopping cart forward. If you’re ready to do the best work of your life, come join our table. Instacart is a Flex First team There’s no one-size fits all approach to how we do our best work. Our employees have the flexibility to choose where they do their best work—whether it’s from home, an office, or your favorite coffee shop—while staying connected and building community through regular in-person events. Learn more about our flexible approach to where we work. Overview About the Role This role sits at the center of one of our most important Enterprise product bets: giving retailers significantly more control over how they differentiate and extend their digital experiences. The PM will define how retailers move beyond standard configurations to create experiences that feel truly their own, using a combination of AI-assisted customization, extensibility, and integrations. This is a highly ambiguous problem space with limited precedent, significant latitude to set the vision, and regular visibility with senior executives. The right person will bring exceptional product judgment, very high throughput decision making, and strong technical acumen. They will be able to partner deeply with senior engineers, align a complex group of stakeholders around a long-term vision and challenge conventional approaches when necessary. The r

Reddit is a community of communities. It’s built on shared interests, passion, and trust, and is home to the most open and authentic conversations on the internet. Every day, Reddit users submit, vote, and comment on the topics they care most about. With 100,000+ active communities and approximately 130 million daily active unique visitors, Reddit is one of the internet’s largest sources of information. For more information, visit www.redditinc.com . The Reddit Consumer Engineering organization builds and scales the products that Redditors use directly to discover content, participate in communities, and connect with others. Sitting at the intersection of large-scale distributed systems and core user journeys, Product Backend Engineers in Consumer Engineering partner directly with Product Managers, Designers, Data Scientists, ML Engineers, and Frontend Engineers to build, experiment with, and scale features that power how hundreds of millions of users discover, join, navigate, and engage with Reddit. This centralized role hires across several high-impact consumer teams, including: Core Product & Feeds: Home Experience, Recommendations & Content Discovery, Content Contribution Community & Presence: Reddit Pro, Youth Experience & Teen Safety, Creator Tools Growth & Engagement: Authentication, Notifications, Social Sharing, SEO, Onboarding. Monetization & Conversion: Paid User Acquisition, Conversion Funnel Optimization Identity & Security: Account Management, Trust & Safety What You’ll Do Cross-Functional Product Architecture: Partner closely with Product Management, Product Design, Data Science, and Client Engineers (iOS/Android/Web) to translate business and user needs into reliable, low-latency technical solutions. End-to-End Delivery: Own the full software lifecycle for major product initiatives from technical design docs and API contracts to development, testing, rollout, and observability. Metrics & Experimentation-Led Enginee

Everpure (NYSE: P) has evolved from storage pioneer to data platform, closing fiscal 2026 with $3.7 billion in revenue, its first billion-dollar quarter, and accelerating growth into FY27. Our strategic agenda spans the companies defining the next era of technology - hyperscalers, AI labs, the AI hardware supply chain, data platform providers, and the broader AI ecosystem. This type of work—work that changes the world—is what the tech industry was founded on. So, if you're ready to seize the endless opportunities and leave your mark, come join us. THE ROLE As a Senior Security Operations Engineer – Attack Surface Management , you will help engineer, operate, and continuously improve our enterprise Attack Surface and Vulnerability Management capabilities. You will focus on discovering and understanding our attack surface, identifying vulnerabilities and exposures, prioritizing them based on real-world risk, and driving remediation across our global environment. The role spans Attack Surface Management, Vulnerability Management, Zero Trust, Secrets and Credential Security, SSPM, Deception, Detection Engineering and Security Automation. We are looking for engineers with strong ASM/Vulnerability Management fundamentals and deeper expertise in one or more adjacent security domains. WHAT YOU’LL DO Engineer and improve enterprise Attack Surface and Vulnerability Management across cloud, infrastructure, endpoints, applications, and internet-facing environments. Discover and correlate assets across security platforms and identify unknown, unmanaged, stale, and externally exposed assets. Drive risk-based vulnerability prioritization using asset criticality, exposure, exploitability, known exploitation, threat intelligence, and compensating controls. Establish remediation workflows and SLAs and partner with asset owners to drive measurable risk reduction. Operate and troubleshoot Zscaler ZIA/ZPA, including SSL inspection, access policies, connectivity, and Zero Trust controls.

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 | New York, NY | Lisbon, Portugal | London, UK About the Role As the Engineering Manager for our Developer Observability Platform you will manage a high-velocity customer-obsessed team. Your mission will be to empower customers by making their telemetry discoverable and actionable in one place. The team is international and distributed, they move fast and are deeply attuned to customer feedback. They bring a d

About the Team The Code Scalability team owns build systems and continuous integration across DoorDash. When a shared dependency changes or more teams contribute to a monorepo, the cost of building software can grow for everyone. We tackle that challenge with Bazel, Buildkite, and infrastructure that keeps everyday development efficient. Our work gives teams a dependable path from a code change to a completed build, with fewer delays and less infrastructure troubleshooting. About the Role As a Senior Software Engineer on Code Scalability, you will solve the engineering problems behind building software at DoorDash’s scale. A change deep in a monorepo can trigger work across many projects; your job is to make that work efficient, predictable, and easy to investigate when something goes wrong. Projects span Bazel configuration and tooling, Buildkite orchestration, build execution and caching, and the services that support them. You will identify where improvements matter most, make the technical decisions, and work with teams across DoorDash to put those changes into practice. The impact of this role extends to every team that depends on our platform. Shorter queues give engineers more time to iterate, dependable pipelines prevent interruptions, and useful diagnostics help them get back to their work. You will measure progress through those outcomes, alongside the cost and maintainability of the infrastructure you own. You’re excited about this opportunity because you will… Evolve build and CI workflows for large monorepos, keeping feedback fast and changes manageable as dependencies, code volume, and the number of contributing teams grow. Develop Bazel rules, toolchains, and integrations that keep builds reproducible and make shared build infrastructure easier for teams to adopt across large monorepos. Improve Buildkite pipeline throughput and reliability by reducing queue times, addressing build bottlenecks, and making better use of CI compute capacity. Reduce

Fanatics Commerce is the global leader in licensed sports merchandise, operating a vertically integrated platform that designs, manufactures, and delivers officially licensed apparel, jerseys, headwear, and collectibles for major leagues, teams, and events worldwide. With more than 900 e-commerce sites and a global omnichannel presence across digital, in-venue, and retail, Fanatics Commerce reaches fans in over 180 countries and powers official fan experiences for many of the world's most iconic sports properties. At Fanatics, we bring our BOLD Leadership Principles to life every day - building championship teams, obsessing over fans, acting with entrepreneurial speed, and delivering with a determined and relentless mindset. ROLE OVERVIEW The Senior Finance Analyst is a key business partner who leads forecasting and performance management, delivers clear insights on P&L, balance sheet, and cash flow drivers, and supports strategic initiatives that improve profitability and operational efficiency across Fanatics Commerce. This role operates independently on highly complex projects with extensive latitude for independent judgment, pairing strong financial acumen with the ability to translate complex data into concise recommendations for leadership. The Senior Finance Analyst delivers business and fan impact through BOLD leadership and execution excellence, leveraging data, automation, and AI-enabled insights. HOW WILL YOU DRIVE IMPACT Success is measured by the ability to deliver results through BOLD capabilities and measurable outcomes. Team & Leadership Impact (Build Championship Teams) Partner cross-functionally with business segment leaders and operational stakeholders to ensure forecasts and financial plans reflect business realities and strategic priorities. Serve as a trusted finance partner to leadership, communicating complex financial information clearly and influencing decision making across levels and functions. Collaborate with finance syste

About the Team DoorDash’s mission is to grow and empower local economies. By building intelligent, last-mile delivery technology for local cities, DoorDash connects people with the local businesses they care about, helping grow businesses and the communities that support those businesses. Our Consumer Retention Marketing team is responsible for building lasting relationships with our customers through personalized, scalable, cross-channel experiences that drive engagement and long-term value. We focus on connecting consumers with the most relevant products, merchants, and moments across DoorDash’s expanding ecosystem, including New Verticals like Grocery, Convenience, Alcohol, and Retail, as well as high-impact seasonal and cultural Occasions. About the Role We are looking to bring on a strategic, solution-oriented, and data-driven retention marketer to join the Core Marketplace retention team. In this role, you will focus on launching and iterating on CRM programs that drive growth and retention for our core business on DoorDash. The ideal candidate is able to think big picture and ideate on the Cx lifecycle in one moment, and seamlessly transition into the weeds of campaign execution and reporting in the next. They have experience building consensus with cross-functional teams, building trusted relationships with cross functional partners, and excel at making data-informed decisions to accomplish campaign and business objectives. You will own end-to-end campaign execution — from channel strategy and audience planning through QA, launch, optimization, and reporting — ensuring every campaign delivers strong engagement and business results. Key areas of support include: creating and maintaining campaigns & workflow strategy for core lifecycle efforts, including offer, cadence, and audience testing; analyzing the impact of initiatives on key business metrics like order rate rate and revenue; creative ideation & iteration, including creative op

Join us in building the future of finance. Our mission is to democratize finance for all. An estimated $124 trillion of assets will be inherited by younger generations in the next two decades. The largest transfer of wealth in human history. If you’re ready to be at the epicenter of this historic cultural and financial shift, keep reading. About the team + role We are building an elite team, applying frontier technologies to the world’s biggest financial problems. We’re looking for thoughtful problem-solvers and builders who want to make a meaningful contribution. Robinhood is a place where people take ownership of their work and help improve financial access for all. We operate with high standards, clear accountability, and a strong focus on security and ethics in everything we build! The Red Team’s mission is to identify and reduce real-world security risks across Robinhood by simulating adversary behavior and testing defenses. As a Staff Offensive Security Engineer, you will plan and execute security assessments across applications, infrastructure, and physical environments, and partner closely with engineering and security teams to strengthen detection and response capabilities. You will help prioritize risk, contribute to remediation efforts, and develop tools and techniques that improve how we test and secure our systems. Your work will directly support the safety and reliability of products used by millions of customers. This role is based in our Bellevue, WA, New York, NY, Denver, CO or Menlo Park, CA office(s), with in-person attendance expected at least 3 days per week. At Robinhood, we believe in the power of in-person work to accelerate progress, spark innovation, and strengthen community. Our office experience is intentional, energizing, and designed to fully support high-performing teams. What you’ll do Evangelize the Offensive Security Team’s Findings and Projects with stakeholders throughout the company and collaborate with other teams to create solu

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 Ubiquiti Prague office is looking for an experienced C#/.NET Desktop Developer to help us build modern, high-quality desktop applications across macOS, Windows, and Linux. This role requires working from our Prague office at least two days per week. Requirements: 3+ years of professional C#/.NET development experience. Strong proficiency in C# and solid experience building desktop applications. Experience with modern .NET and desktop UI frameworks such as Avalonia, WPF, or similar, including MVVM and modern async/await patterns. Experience consuming RESTful APIs and working with WebSocket communication. Experience implementing high-fidelity UIs from Figma designs and collaborating closely with designers. Solid understanding of application architecture, performance optimization, debugging, and memory management. Hands-on experience with modern AI-assisted development tools such as Claude Code, Cursor, Codex, or similar, using AI as part of day-to-day development. Fluent in English and Czech. Nice to Have: Experience with cross-platform desktop development, including shared core architecture with platform-specific UI and service layers. Experience building applications with real-time updates or streaming data using WebRTC, MQTT, or similar technologies. Experience with IPC mechanisms such as named pip

WPP is the trusted growth partner for the world’s leading brands. We unite cutting-edge media intelligence and data solutions, world-class creativity, next-generation production, transformative enterprise solutions and expert strategic counsel in a single company – powered by exceptional talent and our agentic marketing platform, WPP Open, to help our clients navigate change, capture opportunity and deliver transformational growth. We work with the world's most valuable brands and have global reach across 100+ markets, with deep local expertise. Our people are the key to our success. We're committed to fostering a culture of creativity, belonging and continuous learning, attracting and developing the brightest talent, and providing exciting career opportunities that help our people grow. For more information, visit WPP.com. About WPP Open Intelligence The Activation team is the engineering arm of WPP Open Intelligence. We build the foundational data infrastructure and high-performance edge services that support WPP’s activation capabilities. Approximately one-third of global media spend flows through WPP, and our platform is deeply integrated with major supply-side partners across the AdTech industry. At our current scale, our edge services handle more than 60,000 classification requests per second, while our contextual classification pipelines process approximately 10,000 requests per second. With operations across the US and UK and planned expansion across EMEA and APAC, our infrastructure operates at significant global scale. We are an engineering-led team focused on building robust, scalable, highly reliable systems. Why We’re Hiring We are expanding our engineering team to support the next stage of growth and a new catalog of privacy-preserving data products. These products are designed to scale advanced targeting capabilities while protecting user privacy. Our infrastructure is expanding globally, and we are deepen