Senior Engineer 4 Ui Full Stack Developer Jobs

For over 20 years, Smartsheet has empowered teams to manage work seamlessly and scale solutions smarter. Now, in our most ambitious chapter yet, we are uniting human teams with AI agents. By orchestrating the work agents do best, automating manual tasks and uncovering insights at scale, we create the space for people to focus on what truly matters: judgment, creativity, and big thinking. That is magic at work, and it’s what we show up for every day. We're looking for a talented and motivated Senior Software Engineer II to join our Mobile engineering team. You are passionate about continuous learning and eager to grow along with us in a fast-paced, innovative environment. You will work remotely from Bulgaria and will be reporting to an engineering leader based in Bulgaria. You Will: Design and develop mobile frameworks and features for Smartsheet's native applications on both Android and iOS platforms. Guide and mentor team members regarding architecture and best practices for mobile development. Provide technical expertise, solving complex problems and offering thoughtful feedback on peer design and code reviews. Contribute to the full software development lifecycle (SDLC)—defining, designing, implementing, testing, and deploying new features. Participate in troubleshooting and root cause analysis to identify solutions and next steps for production issues. Work autonomously, overseeing essential features and collaborating cross-functionally with product managers, UI designers, senior developers, and testers. Recognize and take ownership of complex technical cross-team issues, driving them to resolution. Support development across multiple platforms (Android, iOS, Native NDK, etc.). Perform other duties as assigned You Have: 7+ years of mobile engineering experience, specializing in native mobile development. Experience in developing consumer mobile applications, with a strong understanding of the mobile ecosystem and a customer-focused attitude. Expertise in Kotlin,

About Stitch Fix, Inc. Stitch Fix (NASDAQ: SFIX) Stitch Fix is redefining retail by combining human creativity with advanced data science and Generative AI. As we build the future of personalized shopping, we’re equally committed to building yours. We believe in investing in our team as much as our technology. Join us to be a trendsetter in the industry and help us redefine what’s possible for our clients, while we help you reach your full potential. About the Role At Stitch Fix, we are at the forefront of innovation, creating cutting-edge solutions that blend fashion, technology, and data science. Our data science team combines machine learning with expert human judgment to generate innovative recommendations and insights that transform the way our clients discover what they love. We believe in a curiosity-driven data science culture where members are empowered to deliver impact through end-to-end model development. The diversity of the problems that we work on and the data-rich environment of our business make it possible, even essential, to bring the tools of multiple disciplines to bear on our hardest problems. We are looking for an experienced Styling Algorithms Team Manager to lead a group of talented machine learning engineers and data scientists. In this role, you will shape the future of fashion technology by driving the development and deployment of our styling algorithms, which empower our human stylists to delight clients by nailing their fit and style. This includes ML-, AI-, and product-driven feature curation and testing for our proprietary styling platform, as well as client-facing AI personalization experiences, such as Stitch Fix Vision, our virtual try-on. Responsibilities: Champion bold AI and ML interventions to improve our styling experiences, enabling our stylists to have a multiplicative impact on their client connection points. Likewise, actively shape the product roadmap for direct client-facing styling experiences, expand

About Stitch Fix, Inc. Stitch Fix (NASDAQ: SFIX) Stitch Fix is redefining retail by combining human creativity with advanced data science and Generative AI. As we build the future of personalized shopping, we’re equally committed to building yours. We believe in investing in our team as much as our technology. Join us to be a trendsetter in the industry and help us redefine what’s possible for our clients, while we help you reach your full potential. About the Role At Stitch Fix, we are at the forefront of innovation, creating cutting-edge solutions that blend fashion, technology, and data science. Our data science team combines machine learning with expert human judgment to generate innovative recommendations and insights that transform the way our clients discover what they love. We believe in a curiosity-driven data science culture where members are empowered to deliver impact through end-to-end model development. The diversity of the problems that we work on and the data-rich environment of our business make it possible, even essential, to bring the tools of multiple disciplines to bear on our hardest problems. We are looking for an experienced Styling Algorithms Team Manager to lead a group of talented machine learning engineers and data scientists. In this role, you will shape the future of fashion technology by driving the development and deployment of our styling algorithms, which empower our human stylists to delight clients by nailing their fit and style. This includes ML-, AI-, and product-driven feature curation and testing for our proprietary styling platform, as well as client-facing AI personalization experiences, such as Stitch Fix Vision, our virtual try-on. Responsibilities: Champion bold AI and ML interventions to improve our styling experiences, enabling our stylists to have a multiplicative impact on their client connection points. Likewise, actively shape the product roadmap for direct client-facing styling experiences, expand

Squarespace is a design-centric company that empowers anyone to stand out and sell online. We're looking for a Senior Product Designer to join our Client Engagement Group (CEG), the suite of tools that helps entrepreneurs understand, manage, and grow their customer relationships. CEG spans CRM and Automations: the Contacts experience that turns customer data into business decisions, and the Automations engine that lets sellers scale by putting manual tasks on autopilot. Depending on where you land, you might be making a complex workflow feel effortless, or turning a dense dataset into something a seller can act on at a glance. Either way, the challenge is the same: powerful technology that feels invisible. You’ll Get To… Simplify the complex. Whether it's a multi-step automation or a data-rich contact view, you'll take sophisticated functionality and make it feel obvious. Design for real business logic. Build experiences that handle triggers, conditions, branching workflows, and customer data without exposing the machinery underneath. Lead data visualization. Create ways to surface audience growth, customer health, and engagement metrics that are meaningful and actionable, not just present. Think end-to-end. Consider the full seller journey, from a lead's first interaction to long-term loyalty, and ensure your work connects seamlessly across the platform. Prototype motion and state. Use high-fidelity prototyping to define how users interact with live data, background processes, and complex UI states. Partner cross-functionally. Work closely with PMs, Engineers, and Researchers to shape strategy, define constraints, and ship great work. Drive craft and systems. Champion quality design and contribute to scalable frameworks that raise the bar across the team. Who We’re Looking For 6+ years of product design experience, with a portfolio showing complex systems (workflow tools, data-rich interfaces, or logic-heavy applications) made simple and human-centered. Syste

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. As a Senior Software Engineer on the Core UI team, you'll take the Roblox App experience to the next level - making it intuitive, reliable, and a joy to use. Our team sits at the intersection of platform engineering and product innovations. You'll work on systems and surfaces used by every Roblox user and creator in every game session. If you care deeply about how software feels - not just how it works - this is the role for you. You Will: Design, build, and own end-to-end development of user-facing features and systems across mobile, desktop, VR, and consoles. Develop robust, extensible systems powering Roblox's core surfaces (Home, Avatar, Search, and more) used by hundreds of millions of users and creators. Create scalable solutions for building high-quality, intuitive, and reliable user interfaces that elevate the overall product experience. Partner with engineering, product, and design teams to deliver cohesive, delightful user experience. You Have: 4+ years of software development experience building large-scale, user-facing applications. Strong expertise in modern frontend technologies, including frameworks like React or similar, component-based architecture, and state management pat

Our mission and customers: We are creating the freedom for SMEs to succeed by delivering Europe's leading finance workspace with banking at its core, augmented by financial tools. We are proud to be rated 4.8 on Trustpilot, based on 55,000+ reviews. Our culture puts customer satisfaction at the core of what we do, as proven by our Net Promoter Score of 75 (more about our culture here). Our journey: Founded in 2017 by Alexandre and Steve, Qonto has grown to 1,600+ Qontoers serving over 600,000+ customers across 8 European countries. We have been profitable since 2023, and we are just getting started. Our beliefs: We hire for skills and potential. With 80+ nationalities, 45% women, of which 56% of women in our leadership team, diversity isn't a program; It's who we are. We've built a discrimination-free hiring process because the best teams are built on merit. AI at Qonto: AI is deeply embedded in how we work (here) - Every Qontoer gets unlimited access to the best AI tools. We want people who experiment without waiting for permission, push AI beyond the obvious, know when to trust it, and when to question it. ------------------------------------------------------------------------------------------------------ Location: You can apply to work at Qonto as long as you're living in (or willing to relocate to) either Germany, France, Italy, Serbia, Portugal, or Spain. Mission Join us as an iOS Engineer and help us build the most intuitive mobile banking experience for European businesses. You'll be crafting features that directly impact the daily financial operations of over 600,000 SMEs across Europe, making their business finance simpler and more efficient. As an iOS Engineer at Qonto, you will: • Craft cutting-edge financial features: Work on critical architectural and UI features that will directly impact our end users. • Foster meaningful collaboration: Work closely with back-end teams, designers, and product managers to create a unified vision. • Solve r

Our mission and customers: We are creating the freedom for SMEs to succeed by delivering Europe's leading finance workspace with banking at its core, augmented by financial tools. We are proud to be rated 4.8 on Trustpilot, based on 55,000+ reviews. Our culture puts customer satisfaction at the core of what we do, as proven by our Net Promoter Score of 75 (more about our culture here). Our journey: Founded in 2017 by Alexandre and Steve, Qonto has grown to 1,600+ Qontoers serving over 600,000+ customers across 8 European countries. We have been profitable since 2023, and we are just getting started. Our beliefs: We hire for skills and potential. With 80+ nationalities, 45% women, of which 56% of women in our leadership team, diversity isn't a program; It's who we are. We've built a discrimination-free hiring process because the best teams are built on merit. AI at Qonto: AI is deeply embedded in how we work (here) - Every Qontoer gets unlimited access to the best AI tools. We want people who experiment without waiting for permission, push AI beyond the obvious, know when to trust it, and when to question it. ------------------------------------------------------------------------------------------------------ Location: You can choose to work at Qonto as long as you're living in (or willing to relocate to) either Germany, France, Italy, Serbia, Portugal, or Spain. Mission Join us as an iOS Engineer and help us build the most intuitive mobile banking experience for European businesses. You'll be crafting features that directly impact the daily financial operations of over 600,000 SMEs across Europe, making their business finance simpler and more efficient. As an iOS Engineer at Qonto, you will: • Craft cutting-edge financial features: Work on critical architectural and UI features that will directly impact our end users. • Foster meaningful collaboration: Work closely with back-end teams, designers, and product managers to create a unified vision. • Solve re

Our mission and customers: We are creating the freedom for SMEs to succeed by delivering Europe's leading finance workspace with banking at its core, augmented by financial tools. We are proud to be rated 4.8 on Trustpilot, based on 55,000+ reviews. Our culture puts customer satisfaction at the core of what we do, as proven by our Net Promoter Score of 75 (more about our culture here). Our journey: Founded in 2017 by Alexandre and Steve, Qonto has grown to 1,600+ Qontoers serving over 600,000+ customers across 8 European countries. We have been profitable since 2023, and we are just getting started. Our beliefs: We hire for skills and potential. With 80+ nationalities, 45% women, of which 56% of women in our leadership team, diversity isn't a program; It's who we are. We've built a discrimination-free hiring process because the best teams are built on merit. AI at Qonto: AI is deeply embedded in how we work (here) - Every Qontoer gets unlimited access to the best AI tools. We want people who experiment without waiting for permission, push AI beyond the obvious, know when to trust it, and when to question it. ------------------------------------------------------------------------------------------------------ Location: You can choose to work at Qonto as long as you're living in (or willing to relocate to) either Germany, France, Italy, Serbia, Portugal, or Spain. Mission Join us as an iOS Engineer and help us build the most intuitive mobile banking experience for European businesses. You'll be crafting features that directly impact the daily financial operations of over 600,000 SMEs across Europe, making their business finance simpler and more efficient. As an iOS Engineer at Qonto, you will: • Craft cutting-edge financial features: Work on critical architectural and UI features that will directly impact our end users. • Foster meaningful collaboration: Work closely with back-end teams, designers, and product managers to create a unified vision. • Solve re

Our mission and customers: We are creating the freedom for SMEs to succeed by delivering Europe's leading finance workspace with banking at its core, augmented by financial tools. We are proud to be rated 4.8 on Trustpilot, based on 55,000+ reviews. Our culture puts customer satisfaction at the core of what we do, as proven by our Net Promoter Score of 75 (more about our culture here). Our journey: Founded in 2017 by Alexandre and Steve, Qonto has grown to 1,600+ Qontoers serving over 600,000+ customers across 8 European countries. We have been profitable since 2023, and we are just getting started. Our beliefs: We hire for skills and potential. With 80+ nationalities, 45% women, of which 56% of women in our leadership team, diversity isn't a program; It's who we are. We've built a discrimination-free hiring process because the best teams are built on merit. AI at Qonto: AI is deeply embedded in how we work (here) - Every Qontoer gets unlimited access to the best AI tools. We want people who experiment without waiting for permission, push AI beyond the obvious, know when to trust it, and when to question it. ------------------------------------------------------------------------------------------------------ Location: You can choose to work at Qonto as long as you're living in (or willing to relocate to) either Germany, France, Italy, Serbia, Portugal, or Spain. Mission Join us as an iOS Engineer and help us build the most intuitive mobile banking experience for European businesses. You'll be crafting features that directly impact the daily financial operations of over 600,000 SMEs across Europe, making their business finance simpler and more efficient. As an iOS Engineer at Qonto, you will: • Craft cutting-edge financial features: Work on critical architectural and UI features that will directly impact our end users. • Foster meaningful collaboration: Work closely with back-end teams, designers, and product managers to create a unified vision. • Solve re

Our mission and customers: We are creating the freedom for SMEs to succeed by delivering Europe's leading finance workspace with banking at its core, augmented by financial tools. We are proud to be rated 4.8 on Trustpilot, based on 55,000+ reviews. Our culture puts customer satisfaction at the core of what we do, as proven by our Net Promoter Score of 75 (more about our culture here). Our journey: Founded in 2017 by Alexandre and Steve, Qonto has grown to 1,600+ Qontoers serving over 600,000+ customers across 8 European countries. We have been profitable since 2023, and we are just getting started. Our beliefs: We hire for skills and potential. With 80+ nationalities, 45% women, of which 56% of women in our leadership team, diversity isn't a program; It's who we are. We've built a discrimination-free hiring process because the best teams are built on merit. AI at Qonto: AI is deeply embedded in how we work (here) - Every Qontoer gets unlimited access to the best AI tools. We want people who experiment without waiting for permission, push AI beyond the obvious, know when to trust it, and when to question it. ------------------------------------------------------------------------------------------------------ Location: You can choose to work at Qonto as long as you're living in (or willing to relocate to) either Germany, France, Italy, Serbia, Portugal, or Spain. Mission Join us as an iOS Engineer and help us build the most intuitive mobile banking experience for European businesses. You'll be crafting features that directly impact the daily financial operations of over 600,000 SMEs across Europe, making their business finance simpler and more efficient. As an iOS Engineer at Qonto, you will: • Craft cutting-edge financial features: Work on critical architectural and UI features that will directly impact our end users. • Foster meaningful collaboration: Work closely with back-end teams, designers, and product managers to create a unified vision. • Solve re

ABOUT THE ROLE Join the Peloton Product Engineering team within our Connected Fitness organization and help build the core software powering the screens of our flagship hardware. In this role, you will develop the primary, member-facing application embedded on every Peloton Bike, Tread, and Row. This is your opportunity to shape the on-equipment software that delivers our best-in-class fitness experiences directly to millions of Members worldwide. YOUR DAILY IMPACT AT PELOTON Build highly engaging, responsive, and scalable customer-facing features from concept to deployment Guide, mentor, and elevate mid-level and junior engineers while optimizing team processes and modernizing engineering solutions Partner closely with Product, UX, and Design teams to evaluate execution feasibility, manage cross-team dependencies, and translate vision into clean code Independently tackle complex engineering tasks, leveraging AI-first coding tools (like Claude Code) and profiling UI, memory, and threading to ensure a flawless user experience YOU BRING TO PELOTON 6+ years of software development experience, including 4+ years of dedicated Android development, backed by a B.S. in Computer Science/Engineering (or equivalent experience). Experience with continuous build integration in an Agile environment, active GitHub projects, or open-source contributions is highly preferred Deep understanding of Kotlin, Java, Android threading, and modern architecture patterns like MVVM and MVI. Familiarity with automation testing frameworks like Espresso is a major plus Strong experience interacting with REST APIs, handling data processing, and evaluating complex engineering trade-offs. Exposure to modern data query languages like gRPC and GraphQL is a distinct advantage Proven ability to manage cross-team coordination, work independently on complex tasks, and turn product and design requirements into seamless, high-performance reality #LI-KN1 #LI-Hybrid The base salary range represents the low and

About the Team OpenAI’s Applications Engineering organization builds and operates the products that bring our cutting-edge research to millions of users and developers worldwide. The Applied Foundations team owns the core product and platform layers that make those experiences possible — from identity & access, to safety to payments & commerce across all of our apps. Our teams span product engineering, infrastructure, and safety, working together to deliver technology that is reliable, secure, and trusted at global scale. About the Role You will be a Senior Android engineer on OpenAI’s Applied Foundations team, building the core mobile experiences that power how users sign up, manage their account, family features, pay for services, stay safe, and interact with OpenAI’s products with confidence. This role is about creating high-quality products as well as reusable Android foundations that product teams across different OpenAI apps depend on to ship quickly while meeting the highest standards for security, reliability, and user trust. You’ll own complex client-side systems spanning UI, networking, local state, payment integrations and Apple platform integrations, and work closely with backend, product, and safety partners to shape the architecture that supports OpenAI’s mobile ecosystem at global scale. You might thrive in this role if you: Have 4+ years of professional software engineering experience. Have a proven track record of building high-quality Android applications in production. Are fluent in Kotlin (and/or Java) and familiar with Android development tools and architecture components. Prioritize performance, security, and user experience in mobile development. Enjoy working cross-functionally to bring ambitious product ideas to life. Care deeply about performance, security, and user experience. About OpenAI OpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artificial intelligence benefits all of humanity. We

About the Team OpenAI’s Applications Engineering organization builds and operates the products that bring our cutting-edge research to millions of users and developers worldwide. The Applied Foundations team owns the core product and platform layers that make those experiences possible — from identity & access, to safety to payments & commerce across all of our apps. Our teams span product engineering, infrastructure, and safety, working together to deliver technology that is reliable, secure, and trusted at global scale. About the Role You will be a Senior iOS engineer on OpenAI’s Applied Foundations team, building the core mobile experiences that power how users sign up, manage their account, family features, pay for services, stay safe, and interact with OpenAI’s products with confidence. This role is about creating high-quality products as well as reusable iOS foundations that product teams across different OpenAI apps depend on to ship quickly while meeting the highest standards for security, reliability, and user trust. You’ll own complex client-side systems spanning UI, networking, local state, payment integrations and Apple platform integrations, and work closely with backend, product, and safety partners to shape the architecture that supports OpenAI’s mobile ecosystem at global scale. In this role, you will: Build and ship new experiences on iOS that showcase the power of AI. Optimize app performance, reliability, and responsiveness at global scale. Design and maintain shared iOS frameworks and primitives for account, trust, and commerce flows that are used across OpenAI’s mobile apps. Establish robust testing frameworks and refine app architecture for long-term maintainability. Collaborate with product, design, research, and backend teams to deliver high-impact features. Provide technical leadership to shape the future of OpenAI’s iOS platform. You might thrive in this role if you: Have 4+ years of professional software engineering experience. Hav

Our mission and customers: We are creating the freedom for SMEs to succeed by delivering Europe's leading finance workspace with banking at its core, augmented by financial tools. We are proud to be rated 4.8 on Trustpilot, based on 55,000+ reviews. Our culture puts customer satisfaction at the core of what we do, as proven by our Net Promoter Score of 75 (more about our culture here). Our journey: Founded in 2017 by Alexandre and Steve, Qonto has grown to 1,600+ Qontoers serving over 600,000+ customers across 8 European countries. We have been profitable since 2023, and we are just getting started. Our beliefs: We hire for skills and potential. With 80+ nationalities, 45% women, of which 56% of women in our leadership team, diversity isn't a program; It's who we are. We've built a discrimination-free hiring process because the best teams are built on merit. AI at Qonto: AI is deeply embedded in how we work (here) - Every Qontoer gets unlimited access to the best AI tools. We want people who experiment without waiting for permission, push AI beyond the obvious, know when to trust it, and when to question it. ------------------------------------------------------------------------------------------------------ Join us as Product Designer in the AI Lab to design AI agents end-to-end — from discovery to delivery — and accelerate Qonto's AI roadmap alongside a team of ~12 engineers, a Product Designer, a PM, and a PMM building on top of one of the most advanced in-house agent platforms in European fintech. You will report to Sophie Cornay, Head of the AI Lab, and work within a fast-moving team of ~15 people shipping AI agents at high cadence. ➡️ What you'll do Design end-to-end experiences for AI agents (from concept to shipped UI/UX) across Qonto. Turn ambiguous problems into clear product flows through discovery, prototyping, and iteration. Run user research (interviews, tests) and translate insights into actionable design decisions. Partner daily with engineers a

ABOUT THE TEAM The Canvas Core team builds and maintains the foundational platform that powers Mural’s visual thinking experience. This includes the infinite canvas, key editor components, document editing behaviors, asset management, real-time collaboration, and the systems that enable fast, reliable, and intuitive interaction on the canvas. We’re also responsible for the Mural UI, the real-time message protocol that enables seamless remote collaboration, and the developer-friendly APIs that internal teams use to build features like diagramming, workshops, presentations, integrations, and AI-enabled product capabilities. Our mission is to ensure the Mural editor is fast, reliable, intuitive, and easy to build on. We prioritize performance, simplicity, developer experience, and platform quality, enabling teams across the company to ship quickly and safely on top of Canvas Core. YOUR MISSION As a Senior Software Engineer, you’ll help design, build, and improve the Canvas platform so that the Mural editor remains reliable, high-performing, and intuitive for our users. You’ll work on the systems that power real-time collaboration, shared document editing, spatial interactions, rendering and interaction performance, asset management, developer APIs, and AI-enabled product capabilities across the Mural editor. Your role will be to reduce platform complexity, improve the quality and speed of Canvas development, and help teams ship high-quality editor experiences quickly and safely. You’ll partner closely with Product, Design, Engineering, and other stakeholders to turn ambiguous product and platform problems into clear, maintainable technical solutions. Senior Engineers at Mural lead by example through strong technical execution, thoughtful design, high-quality implementation, and collaborative problem-solving. They help raise the bar for their team through design discussions, code reviews, mentoring, documentation, and pragmatic improvements to engineering practices. WHA