Engineer Senior Jobs

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 - As a Senior Sales Engineer at Instacart, you'll have a unique opportunity to drive adoption of our flagship, industry leading ecommerce products and services directly to the largest retailers in North America and across the globe. This role requires you to lead consultative, technical-focused discussions with external and internal stakeholders, supporting new implementations and integrations. With your expertise, you'll guide customers through the sales cycle, providing both technical and product knowledge. Collaborating with cross-functional teams will give you a holistic understanding of Instacart's technical capabilities. About the Team - You’ll join our Sales Engineering team, working at the intersection of Business Development, Product, Engineering, and Enterprise Solutions. We collaborate as one team to bring Instacart’s ecosy

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 - As a Senior Sales Engineer at Instacart, you'll have a unique opportunity to drive adoption of our flagship, industry leading ecommerce products and services directly to the largest retailers in North America and across the globe. This role requires you to lead consultative, technical-focused discussions with external and internal stakeholders, supporting new implementations and integrations. With your expertise, you'll guide customers through the sales cycle, providing both technical and product knowledge. Collaborating with cross-functional teams will give you a holistic understanding of Instacart's technical capabilities. About the Team - You’ll join our Sales Engineering team, working at the intersection of Business Development, Product, Engineering, and Enterprise Solutions. We collaborate as one team to bring Instacart’s ecosy

About Decagon Decagon is the leading conversational AI platform empowering every brand to deliver concierge customer experiences. Our technology enables industry-defining enterprises like Avis Budget Group, Block’s Cash App and Square, Chime, Oura Health, and Hunter Douglas to deploy AI agents that power personalized, deeply satisfying interactions across voice, chat, email, SMS, and every other channel. We’re building a future where customer experiences are being redefined from support tickets and hold music to faster resolutions, richer conversations, and deeper relationships. We’re proud to be backed by world-class investors who share that vision, including a16z, Accel, Bain Capital Ventures, Coatue, and Index Ventures, along with many others. We’re an in-office company, driven by a shared commitment to excellence and velocity. Our values — Just Get It Done, Invent What Customers Want, Winner’s Mindset, and The Polymath Principle — shape how we work and grow as a team. About the Team Product Engineering at Decagon builds all aspects of the platform our customers use to create, operate, and improve their AI agents. We turn work that currently requires an engineer into product that a CX team can run themselves. This team is core to how Decagon scales. The frameworks we build support every agent we have in production, each with its own workflows, data, and constraints. We build the agents too, and that’s what keeps the platform honest: a failure mode we debug in production becomes a guardrail, an eval, or a piece of tooling that catches it everywhere. Our agents run for companies like Hertz, American Airlines, and Notion across chat, voice, email, and SMS. About the Role You’ll design and build the systems that let customers configure, train, test, and monitor sophisticated AI agents with confidence. That means strong engineering underneath, and abstractions on top that hold up across different use cases without forking per customer. You’ll work day to day with prod

About Datadog We're on a mission to build the best platform in the world for engineers to understand and scale their systems, applications, and teams. We operate at a high scale - trillions of data points per day — providing always-on alerting, metrics visualization, logs, and application tracing for tens of thousands of companies. Our engineering culture values pragmatism, honesty, and simplicity to solve hard problems the right way. The Opportunity User safety and platform integrity is critical to our business. Our customer’s success is our success. We’re looking for a Senior Security Engineer to join us in taking a proactive, highly scalable, and data-centric approach to enabling a safe and trustworthy experience for the users of our rapidly growing and increasingly interactive platform. You’ll fight against threats to our users, platform abuse, and other potentially risky and unwanted behaviors on our platform. Our team covers a broad range of trust and safety related topics including software engineering, data science, user engagement, privacy, threat detection, incident response, and bridging gaps between security and the broader Datadog business. You will bring expertise in a few of these areas. You’ll join a growing security team at an ideal time for making a big impact. Datadog is growing rapidly, and AI-assisted development is increasing both the pace of software delivery and the amount of activity generated by AI agents. The product is seeing very high growth, with the platform becoming more interactive and new products and features developed regularly. 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: Have a direct impact on customers and their overall trust of our platform. Drive the technical roadmap in colla

Husky is what we call the distributed, petabyte-scale columnar event store at the heart of our Event Platform, which powers dozens of Datadog’s most popular products – Logs, RUM, APM, Cloud Network Monitoring, Netflow, and many more. Husky was built from the ground up at Datadog to store and query massive volumes of event data at low cost, with data fully queryable within seconds of arrival. As a Senior Software Engineer on this team, you'll work hands-on with a distributed storage system at petabyte scale, and help us evolve our platform to support the next level of scale that will power the AI era. We will move from a custom storage format towards open standards (Parquet, Arrow, DataFusion) enabling on prem solutions, increasingly complex analytical/batch workloads, and powering AI observability, sustainably into the future. You'll partner closely with Husky Ingestion, Metadata, and Platform, and increasingly with Lakehouse on the Iceberg-compatible boundary between Husky and analytical/batch workloads. You will also work with the open source community to build the next generation of reusable software solutions that can be operated at scale. Datadog has a culture that is increasingly rare in mature technology companies. We are an engineering driven, bottom up, high agency/high responsibility culture–where everyone is empowered and expected to drive the technological and strategic direction of the business over time. We are a blameless culture where we believe supporting each other through challenges produces the best outcomes over time and our track record corroborates this. We are open source champions. We believe in the flexibility of working remotely but also the value of bringing people together across our various offices worldwide–and our offices are nice places to work. What You’ll Do: Drive Husky to the next level of adoption by migrating our storage format to open source Parquet and re-imagine compaction on a format-agnostic, Data

About Decagon Decagon is the leading conversational AI platform empowering every brand to deliver concierge customer experiences. Our technology enables industry-defining enterprises like Avis Budget Group, Block’s Cash App and Square, Chime, Oura Health, and Hunter Douglas to deploy AI agents that power personalized, deeply satisfying interactions across voice, chat, email, SMS, and every other channel. We’re building a future where customer experiences are being redefined from support tickets and hold music to faster resolutions, richer conversations, and deeper relationships. We’re proud to be backed by world-class investors who share that vision, including a16z, Accel, Bain Capital Ventures, Coatue, and Index Ventures, along with many others. We’re an in-office company, driven by a shared commitment to excellence and velocity. Our values — Just Get It Done, Invent What Customers Want, Winner’s Mindset, and The Polymath Principle — shape how we work and grow as a team. About the Team Product Engineering at Decagon builds all aspects of the platform our customers use to create, operate, and improve their AI agents. We turn work that currently requires an engineer into product that a CX team can run themselves. This team is core to how Decagon scales. The frameworks we build support every agent we have in production, each with its own workflows, data, and constraints. We build the agents too, and that’s what keeps the platform honest: a failure mode we debug in production becomes a guardrail, an eval, or a piece of tooling that catches it everywhere. Our agents run for companies like Hertz, American Airlines, and Notion across chat, voice, email, and SMS. About the Role You’ll design and build the systems that let customers configure, train, test, and monitor sophisticated AI agents with confidence. That means strong engineering underneath, and abstractions on top that hold up across different use cases without forking per customer. You’ll work day to day with prod

Secure Every Identity, from AI to Human Identity is the key to unlocking the potential of AI. Okta secures AI by building the trusted, neutral infrastructure that enables organizations to safely embrace this new era. This work requires a relentless drive to solve complex challenges with real-world stakes. We are looking for builders and owners who operate with speed and urgency and execute with excellence. This is an opportunity to do career-defining work. We're all in on this mission. If you are too, let's talk. The Auth0 platform secures more than 100 million logins each day for customers all around the world. The Platform Infrastructure team enables Auth0 engineers to move faster by giving them tools to easily deploy and manage their services on AWS and Azure. This is a role within a team that has a huge impact. You will get to work with engineers throughout the organization and what you build will be a cutting-edge, foundational piece of the infrastructure that allows Auth0 to scale for years to come. We are looking for Engineers who are passionate about distributed systems, performance and scaling, and delivering customer value. Because we build and support the overall Auth0 platform, the ideal candidate is someone who is passionate about infrastructure, operations, and not intimidated by cross-organization coordination and collaboration. You will: Develop and maintain a scalable platform runtime using infrastructure-as-code, enabling teams to seamlessly deploy and manage services across Kubernetes, AWS, and Azure. Tackle highly ambiguous requirements to architect scalable, resilient infrastructure solutions for cross-cutting concerns (e.g., service discovery, routing), while setting platform best practices. Proactively identify performance bottlenecks and advocate for new technologies to optimize platform resiliency, scale, and cost. Use observability tools like DataDog and Prometheus to design SLIs and enforce platform SLOs. Design secure-by-defa

Who We Are At Justworks, you’ll enjoy a welcoming and casual environment, great benefits, wellness program offerings, company retreats, and the ability to interact with and learn from leaders in the startup community. We work hard and care about our most prized asset - our people. We’re helping businesses get off the ground by enabling them to focus on running their business. We solve HR issues. We’re data-driven and never stop iterating. If you’d like to work in a supportive, entrepreneurial environment, are interested in building something meaningful and having fun while doing it, we’d love to hear from you. We're united by shared goals and shared motivations at Justworks. These are best summed up in our company values, which are reflected in our product and in our team. Our Values If this sounds like you, you’ll fit right in. Who You Are You are a senior product engineer who enjoys solving hard problems where software, APIs, and real developer workflows meet. You can take a partner's desired customer experience, understand both sides of an integration, and deliver a practical, supportable solution with the capabilities that are available today. You bring strong API and web-platform fundamentals, communicate comfortably with external technical audiences, and care as much about the developer's path to success as the code itself. You are not satisfied with repeatedly solving the same problem by hand: you turn what you learn from partner work into better SDKs, documentation, tooling, and integration patterns. What You Will Work On Independently lead technical discovery and solutioning for priority partner integrations, including partner API research, data mapping, authentication and authorization flows, architecture choices, implementation support, and launch readiness. Build and maintain high-quality developer ecosystem capabilities: portal experiences, documentation tooling, SDKs, sample apps, quickstarts, integration templates, and developer-support automat

We believe that the way people interact with their finances will drastically improve in the next few years. We’re dedicated to empowering this transformation by building the tools and experiences that thousands of developers use to create their own products. Plaid powers the tools millions of people rely on to live a healthier financial life. We work with thousands of companies like Venmo, SoFi, several of the Fortune 500, and many of the largest banks to make it easy for people to connect their financial accounts to the apps and services they want to use. Plaid’s network covers 12,000 financial institutions across the US, Canada, UK and Europe. Founded in 2013, the company is headquartered in San Francisco with offices in New York, Seattle, Washington D.C., Raleigh, London, and Amsterdam. The Analytics Engineering team owns the full-stack analytics foundation for Plaid's GTM, CGX, NEA and Marketing organizations. We build and maintain the core semantic layer data models (dbt on Databricks), activation layer, and BI surfaces that these teams rely on — and we partner with stakeholders to turn those models into decisions, forecasts, analytics and experiments. As a Senior Analytics Engineer, you’ll also act as an applied data science partner. In addition to core analytics engineering, you’ll work on predictive modeling, experimentation, lifetime value (LTV), and attribution alongside the broader team. As a Senior Analytics Engineer on the Marketing pod, you will be the technical owner of Plaid's Marketing data stack. You will build the dbt models, predictive frameworks, and self-serve data products that Marketing leadership uses to plan spend, measure performance, and drive growth. You'll partner directly with PMM, Growth Marketing, and Marketing leadership to deliver core data models, frameworks, and tools — including LTV, lead scoring, and experimentation tooling — with a north star that aims for prescriptive and production-grade analytics. You'll also help build the

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 bold thinkers. Sharp problem-solvers. Builders who are wired to make an impact. Robinhood isn’t a place for complacency, it’s where ambitious people do the best work of their careers. We’re a high-performing, fast-moving team with ethics at the center of everything we do. Expectations are high, and so are the rewards. The Crypto Perpetuals team is building Robinhood’s advanced trading experience for customers who want fast, intuitive access to crypto derivatives markets. Our team powers the mobile workflows that help traders monitor price action, understand market depth, manage risk, and place trades with confidence in rapidly moving markets. We work at the intersection of high-performance UI, real-time market data, and complex trading systems. From responsive charting and order entry to position management and risk-aware product experiences, our work directly shapes how active traders engage with Robinhood’s crypto platform. As a Senior iOS Engineer on the Crypto Perpetuals team, you’ll design and build performant mobile experiences that support real-time data, sophisticated trading flows, and highly reliable execution. You’ll partner closely with product, design, and backend engineering to deliver intuitive tools for serious traders, while helping raise the technical bar across the team through strong architecture, execution, and mentorship. This role is based in our Menlo Park, CA OR New York, NY OR Toronto, ON office, with in-person attendance expected at least 3 days per week. At Rob

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. The Foundation and Luau Platform team builds the shared platform that Roblox's user interface runs on. Our UI is written in Luau, Roblox's scripting language, using React-style frameworks. We own the core pieces that product teams across Roblox rely on: a component library used across Roblox's apps and tools, server-driven UI, the core app frame and navigation, and the frameworks and libraries underneath them. Our goal is to make that platform fast, consistent, and reliable for the engineers who build on it. As a Senior Software Engineer, you will help shape and build it, working across systems, platforms, and infrastructure. You Will Design and build the frameworks and APIs that Roblox's UI is built on, including layout and navigation systems, server-driven UI, and a shared component library Build and evolve the core systems beneath the UI, such as navigation, routing, state management, and data flow, so features load quickly and behave consistently Drive startup performance, transition smoothness, and layout stability across the client on phones, tablets, and desktop, using traces and telemetry to set measurable quality bars Roll out platform changes safely at scale, using feature flags,

Ready to do the most impactful work of your career? At Coinbase , we are uncompromising on our mission to increase economic freedom. The bar is high, the environment is intense, and we like it that way. This isn't a place for complacency, it’s a place to be pushed past your perceived limits. If you're ready to build the future of finance alongside people who refuse to settle for "good enough," you belong here. Coinbase is a remote-first, but not remote-only company. Expect to get together quarterly for intense in-person working sessions called “surges.” learn more about working at Coinbase . Senior Frontend Engineer, Portfolio The Portfolio team within the Consumer & Business group owns how millions of Coinbase users understand what they hold and how it's performing. We build the balances, holdings, and profit-and-loss experiences at the core of the Coinbase app and website, the surfaces users open first, check most often, and trust most. As a Senior Frontend Engineer on Portfolio, you'll turn complex, real-time financial data into clarity for every kind of Coinbase user, from first-time buyers to sophisticated traders. What you'll do: Own the design and delivery of core Portfolio experiences including balances, holdings, and PnL across web (React/TypeScript) and native mobile (iOS and Android) Build performant, accessible, pixel-accurate UI that renders real-time financial data at Coinbase scale Partner with backend, design, and product to take ambiguous problems from scoping through production rollout Drive frontend architecture and quality including component reuse, state management, testing, and performance instrumentation Strengthen the team's engineering bar through rigorous code reviews, technical mentorship, and well-documented architecture decisions Required Skills and Experience: 5+ years of frontend engineering experience building consumer-facing web applications with high-quality, well-tested production code Deep expertise in React and Ty

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

📍 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.