Staff Engineer – Backend Systems & Analytics

WHY CONTROL EXISTSControl aims to redefine the crypto wallet experience, moving beyond the needs of traders to create a private custody platform for digital wealth. Designed for families and individuals focused on long-term legacy rather than short-term market fluctuations, we provide a secure infrastructure for managing multi-chain assets—ensuring they are organized, safeguarded, and accessible for generations.Unlike typical DeFi dashboards or exchange wrappers, Control is committed to establishing a standard in digital wealth custody where trust, reliability, and craftsmanship endure over decades.THE ROLEWe are seeking a passionate Staff Frontend Engineer to lead the development of our production web application from inception to launch. As the principal frontend engineer, you will collaborate intimately with our CTO and a full-stack engineer to develop an innovative backend platform and APIs.Your work will be at the intersection of complexity and trust in our custody platform. Users will manage significant wealth across various blockchains—signing transactions, analyzing portfolios, and organizing long-term assets. Each loading state, confirmation flow, and edge case will matter; your contributions will shape how users perceive the security and reliability of Control.We are rebuilding Control from the ground up. Following the successful launch of our v1 platform, we are now developing v2 as a greenfield product—introducing new architecture, a fresh technology stack, and elevated standards. This presents a unique engineering opportunity: a validated product with real user engagement, coupled with the creative freedom of a blank canvas.This role emphasizes craftsmanship and ownership over mere task completion. You will have the authority to shape the UI/UX, define the frontend architecture, create a design system, and directly deploy every user-facing feature.

Join our innovative team at Silver as a Senior Frontend Engineer, where you will be at the forefront of developing cutting-edge web applications that delight users. We seek a talented individual who is passionate about crafting seamless user experiences and driving the evolution of our digital products.

Resilientco seeks a Frontend Engineer located in Argentina to help create user interfaces that are both intuitive and responsive. This position centers on building web applications that look good and work smoothly, with a strong emphasis on usability. What you will do Develop and maintain features for web-based products Work closely with designers to translate ideas into user-friendly interfaces Coordinate with backend engineers to connect frontend and backend systems Write code that is clean, maintainable, and focused on performance Requirements Experience building modern web interfaces Interest in delivering polished digital experiences Ability to work well within a collaborative, cross-functional team Residence in Argentina

ABOUT THE TEAMThe Frontend Platform team at Mural is dedicated to creating systems that empower exceptional product development. We manage foundational frontend components, design systems, and the infrastructure that enables product engineers and designers to concentrate on addressing real user needs. Our goal is to simplify complexity, enabling teams to deliver quickly and safely while upholding high standards of quality, accessibility, and performance as Mural continues to grow.YOUR MISSIONYour mission is to equip Mural’s product engineers and designers with the tools to create outstanding frontend experiences with confidence. You will design and enhance scalable frontend platform systems that support rapid experimentation while ensuring long-term maintainability. Your work will facilitate better decision-making, prevent redundant solutions, and provide reliable, accessible, high-performance experiences for millions of users. This position is ideal for engineers who relish the ownership of systems, setting standards, and enhancing the effectiveness of others.WHAT YOU'LL DODesign, build, and maintain frontend platform systems with React and TypeScript, focusing on clarity, extensibility, and long-term sustainment.Develop shared component libraries and design systems in close collaboration with Design and Product teams, balancing consistency with flexibility.Define and evolve frontend architectural patterns that enable teams to ship safely, debug efficiently, and scale seamlessly.Create developer tooling, documentation, and examples that lower cognitive load and enhance onboarding, testing, and reuse across teams.Ensure platform performance, accessibility, and reliability by maintaining high standards for shared components.Identify and resolve systemic challenges in the frontend development lifecycle at the platform level instead of relying on one-off fixes.Engage with product teams early to comprehend challenges and propose solutions that minimize costs and risks.Participate in code reviews and platform governance to elevate standards through example and constructive feedback.Mentor and influence fellow engineers through sound judgment, effective communication, and high-quality work.

About Us Stensul is the Governed Creation™ Platform designed for enterprise marketing teams that require rapid, secure, and scalable campaign creation. Our platform integrates AI-driven creation, no-code production, embedded governance, and seamless marketing technology stack integrations, resulting in faster outputs, lower costs, reduced risks, and consistent brand alignment. At Stensul, we prioritize intentionality in our work approaches as much as in our product development. We are a people-first organization that champions inclusive collaboration, ownership, and a commitment to continuous learning. If you excel in a fast-paced environment and are eager to shape the future of marketing creation, we invite you to connect with us. Your Role As a seasoned expert, you will become a vital member of our close-knit, cross-functional Product Engineering teams, enhancing the Stensul platform's value to our elite clientele by delivering high-caliber solutions that meet the highest standards. This role affords you the unique opportunity to work alongside Product, Design, and QA specialists to uncover and address new market opportunities in an agile manner. You will engage in technical discussions and decision-making that elevate our software development practices while mentoring and coaching fellow developers. We are currently experiencing significant growth, which necessitates swift action; however, you will collaborate with intelligent, driven individuals in an enjoyable, cooperative environment that offers ample opportunities for professional development. Our technology stack includes PHP, MongoDB, Redis, Docker, JavaScript (and Node.js), Vue.js, Go, and Python, among others. Embracing Agile methodologies is a core value of ours, meaning we continuously seek ways to improve and welcome new tools and languages that enhance our processes. Key Responsibilities: Transforming loosely defined requirements into effective solutions based on the product vision. Collaborating within a cross-functional team (Engineering, Product, Design, QA) to understand and exceed our users' most critical needs. Contributing to architectural and system design discussions and decisions. Designing, implementing, and maintaining enhancements to our platform's functionality. Writing high-quality, standardized, concise, and maintainable code. Fostering an AI-first culture in coding practices. Identifying and resolving bugs efficiently. Adhering to our agile methodology and contributing to ongoing improvements.

Join Coderio as a Senior Frontend Engineer and play a pivotal role in developing innovative web applications that enhance user experience and drive company success. You will collaborate with cross-functional teams, utilize modern technologies, and contribute to the overall architectural design of projects.

At Intuition Machines, we harness the power of AI and machine learning to develop cutting-edge enterprise security solutions. Our innovative research impacts systems that serve hundreds of millions of users globally, supported by a diverse team working remotely across various locations. You may recognize us for our flagship product, the hCaptcha security suite. Our operational philosophy emphasizes minimal overhead, small, agile teams, and rapid product iterations.As a Senior Frontend Engineer, you will play a pivotal role in collaborating with team members, product owners, and key stakeholders to conceptualize, develop, and implement solutions that align with predefined requirements. You will oversee project deliverables, timelines, and stakeholder expectations, ensuring a seamless user experience through high-quality code that adheres to best practices in security and reliability. Staying abreast of market trends and innovations will be crucial in creating an appealing, consistent, and highly functional user interface.Key Responsibilities:Design, develop, and maintain secure, robust, scalable, and high-performance frontend web and mobile applications.Produce well-structured, maintainable, and thoroughly tested code that meets our high standards, suitable for open-source contribution.Enhance our global codebase through collaborative efforts including brainstorming sessions, code reviews, and unit testing.Translate complex customer requirements into actionable code for sprint pipelines, while providing mentorship and support to team members.Desired Qualifications:A minimum of 4 years of relevant experience in frontend development.In-depth knowledge of JavaScript, especially with frameworks such as React, for building intricate solutions.Demonstrated expertise in solution architecture and engineering, including requirements gathering and problem-solving skills.Strong communication and presentation skills, with experience mentoring and supporting peers from diverse backgrounds.Preferred Skills:Experience with WebGL, WebWorkers, or other modern web APIs.Familiarity with containerization tools like Docker and Kubernetes.Understanding of online security frameworks and annotation interfaces.What We Offer:A fully remote working environment with flexible hours.An inspiring global team of talented professionals.Modern development workflows that prioritize frequent deliveries.The opportunity to make a significant impact with a broad user base and engaged customers.A flat organizational structure allowing direct interaction with customer teams.We are dedicated to promoting equality of opportunity and fostering an inclusive atmosphere for all our team members.Join us in revolutionizing the fields of cybersecurity and user privacy.

Join us as a Senior Frontend Engineer and make a significant impact in building innovative digital experiences. We are looking for talented individuals who thrive in a collaborative environment and are eager to contribute their expertise to our exciting projects.About Our ClientOur client, squad, is a visionary company dedicated to crafting high-quality digital solutions at scale. They specialize in creating web applications that are not only performant but also accessible and reliable, catering to a diverse and expanding user base across various markets.With a robust engineering culture, they prioritize clean architecture, performance enhancement, and seamless collaboration among product, engineering, and content teams. Their frontend technology stack prominently features React and Next.js, focusing on scalability and sustainable maintenance.About the TeamAs a member of a distributed, product-oriented engineering team, you will work fully remotely, engaging closely with colleagues from frontend, backend, and content disciplines to deliver exceptional user experiences.The team values independence, ownership, and transparent communication, fostering an environment where engineers are encouraged to share ideas, enhance systems, and continuously develop their skills.About the RoleIn your role as a Senior Frontend Engineer (Next.js / React), you will be instrumental in creating reliable, scalable, and high-quality web experiences. Collaborating closely with engineering and content teams, you will develop reusable components, integrate content from a headless CMS, and uphold the highest standards of performance and accessibility.You will actively contribute to shared codebases, enhance frontend architecture, and address performance and production challenges in a modern TypeScript environment.Key ResponsibilitiesDevelop and maintain web pages and reusable components utilizing React and Next.jsIntegrate content from a headless CMS (Sanity) following schema-driven data approachesEnsure responsive design, adherence to accessibility standards, and optimal performance across devicesDiagnose and resolve TypeScript, data-shape, and rendering issues in live environmentsEnhance frontend performance metrics, including Core Web Vitals and loading efficiencyCollaborate with content and engineering teams to align CMS schemas with frontend requirementsContribute clean, maintainable, and well-structured code to shared codebasesKey Qualifications5–7 years of professional experience in frontend developmentStrong proficiency in React and Next.jsExperience with TypeScript and modern web development practicesSolid understanding of web performance optimization and accessibility standardsAbility to work collaboratively in a remote team environment

WHY CONTROL EXISTSMost crypto wallets are designed for traders, but Control takes a different approach.Control is a private custody platform for digital wealth—crafted for families and individuals who prioritize legacy over market trends. We are establishing the infrastructure for people to safeguard their digital heritage: multi-chain assets that are secure, organized, and accessible for generations.This is not just another DeFi dashboard or exchange tool. This is digital wealth custody, where trust, reliability, and craftsmanship are measured in decades, not mere sprints.THE ROLEWe are seeking a Staff Full-Stack Engineer to be a key architect in the development of Control v2. You will collaborate closely with the CTO, focusing mainly on backend development—designing and creating the APIs, services, and data systems that drive wallet operations, transaction signing, asset custody, and portfolio management. You will also engage with frontend tasks as required to ensure seamless integration and timely delivery.This role emphasizes ownership over mere task completion. Your architectural decisions will shape the platform for years to come, and the code you write will protect real assets. You will work in a compact team where your judgment profoundly influences product quality.We are rebuilding Control from the ground up. The v1 platform validated the market, and now we are creating v2 as a greenfield project with new architecture, stack, and standards. This is a unique engineering opportunity: a product with actual users and market validation, combined with the technical freedom of a blank canvas.WHAT YOU WILL DODesign and develop backend APIs and services that enable wallet management, transaction signing, asset tracking, and portfolio operations across various blockchains.Take ownership of PostgreSQL schema design—modeling financial and blockchain data with the foresight required for long-term custody. Implement safe, type-aware migrations.Develop and maintain blockchain interaction layers for EVM chains, Solana, Bitcoin, Cosmos, and future networks.Create webhook handlers, background jobs, and asynchronous workflows for transaction monitoring, balance updates, and wallet lifecycle management.

Greetings! We are Fever, the premier technology platform for culture and live entertainment.Our mission? To make culture and entertainment accessible to everyone. Through our proprietary, state-of-the-art technology and data-driven methodologies, we are transforming how individuals connect with live events. Every month, our platform motivates over 300 million users across more than 40 countries (and growing) to discover unforgettable experiences, while also empowering event creators with our technology and insights, helping them innovate and expand their reach to new audiences.Our achievements? We have collaborated with renowned industry leaders such as Netflix, F.C. Barcelona, and Primavera Sound, delivered internationally acclaimed experiences, and received backing from several prominent global investors! Quite impressive, isn't it?To fulfill our mission, we seek ambitious individuals with a proactive mindset who are excited to help shape the future of entertainment!Are you ready to be part of the experience?Now, let’s delve into this role and how you can contribute to Fever’s mission.The engineering team is behind the user-friendly iOS and Android apps, as well as our website, which serve users globally. We are responsible for creating, developing, enhancing, and maintaining all Fever services to ensure that more individuals can enjoy amazing experiences.About the roleLocation: ArgentinaYou will be part of the Engineering team, contributing to our applications that help users access the best experiences in their cities.Your primary focus will be on using Angular and Astro to develop scalable, high-performance web applications.Key responsibilitiesCraft user-friendly, performant, and engaging web experiences for thousands of users worldwide.Collaborate within an agile, cross-functional team comprising full-stack, mobile, backend, and frontend engineers, along with product designers.Evaluate the technical trade-offs of various solutions, implement them, and ensure scalability.Adopt a product-oriented mindset, striving for the best outcomes for the product.Engage with the broader team through regular design critiques and collaborative sessions.What would you do at Fever?

About ConcourseAt Concourse, we are dedicated to revolutionizing corporate finance through innovative AI agents. Our technology seamlessly integrates with core enterprise data sources, enabling AI agents to analyze data naturally, provide instant insights, and empower our clients to make informed decisions. Since our inception less than a year ago, we have rapidly expanded, partnering with numerous high-growth companies, including unicorn startups like Persona, Front, and Lightmatter, as well as Fortune 500 giants.Supported by industry leaders such as Andreessen Horowitz and CRV, we are on a mission to transform the finance landscape.About the RoleWe are seeking a passionate Frontend Engineer to redefine how our customers engage with Concourse's groundbreaking AI solutions. Your role will be pivotal in converting intricate financial data and AI workflows into user-friendly and engaging product experiences.In this position, you will be responsible for developing intuitive interfaces that allow finance teams to explore insights and conduct analyses efficiently. Your contributions will directly influence our customers' experience with Concourse's capabilities.Utilizing technologies such as React and TypeScript, you will deliver high-quality user interfaces swiftly. As one of the initial engineers, you will play a significant role in shaping our frontend architecture, product patterns, and standards for speed and quality. Collaborating closely with the founders, engineering team, and customers, you will help iterate quickly to create a world-class product.This opportunity is perfect for someone who has a keen eye for UI excellence, takes pride in crafting beautiful interfaces, and is eager to lay the groundwork for a product that defines its category.

Join Concourse, a pioneering company revolutionizing corporate finance with AI agents that enhance decision-making by connecting enterprise data sources and delivering insights through natural language processing.In less than a year, we've experienced remarkable growth, deploying our AI solutions in numerous high-growth firms, including unicorns like Persona and Front, as well as Fortune 500 companies.Backed by renowned investors such as Andreessen Horowitz and CRV, we foster a collaborative and energetic remote work environment in Buenos Aires, ensuring both rapid iteration and deep focus.About the RoleWe are seeking a passionate Frontend Engineer to enhance customer interactions with our AI agents. Your role will involve transforming complex financial data and AI workflows into intuitive and engaging product experiences. You'll create user interfaces that allow finance teams to uncover insights, perform analyses, and gain a comprehensive understanding of their business, shaping how they perceive the power of Concourse.Utilizing React and TypeScript, you will deliver high-quality, efficient UI components. As an early member of our engineering team, you will play a crucial role in defining frontend architecture, product patterns, and excellence in UI craftsmanship. If you're passionate about creating stunning interfaces and eager to contribute to defining a category-leading product, we want to hear from you!

Are you ready to take your career to new heights?Clara is the premier fintech company in Latin America, revolutionizing how businesses handle their payments. We empower over 20,000 enterprises with our state-of-the-art solutions, enabling them to manage their corporate spending efficiently through locally issued corporate cards, bill payments, financing options, and a robust B2B platform.Supported by renowned investors such as monashees, Kaszek, and Canary, alongside global leaders like Goldman Sachs and Citi Ventures, Clara is on a mission to build the financial infrastructure that drives success for organizations across the region. Join us and thrive in a dynamic environment where your career can flourish, and you can achieve extraordinary work alongside a dedicated team spread across the Americas.This role is aimed at creating a talent pool for future openings. While we aren't actively hiring at this time, we are eager to connect with outstanding talent. Apply now, and we will keep your profile on file for relevant opportunities.What you will be doingWe are keen to build our pipeline with exceptional Senior Frontend Engineers who are passionate about crafting the future of user experiences at Clara. If you have a strong interest in frontend architecture, modern React development, and creating seamless user interactions, this is the ideal opportunity to express your interest for future roles.As a Senior Frontend Engineer, you will be responsible for designing and implementing scalable web applications that prioritize speed, security, and visual consistency. You will work in close collaboration with product managers, designers, and backend developers to enhance our platform’s user experience and functionality.

We are seeking a Senior Frontend Developer with extensive experience in Angular, dedicated to the development of modern, scalable, and high-performance web applications. This role involves a combination of advanced technical development, technical leadership, mentorship, and strategic participation in architectural decisions and technological modernization.Design, develop, and implement interactive and scalable web applications using Angular (modern versions).Build reusable and optimized components.Manage application state with NgRx.Implement reactive programming with RxJS.Optimize performance, loading times, and user experience.Apply best practices in development, testing, and code quality.

Join the innovative team at Workstate as a Senior Frontend Developer! In this pivotal position, you will craft dynamic user interfaces and guarantee a seamless user experience across our web applications. Your enthusiasm for modern frontend technologies and commitment to delivering superior user experiences will help you excel at Workstate.We are on the lookout for developers who can inspire and engage our clients, while diving deep into frontend development and conceptualizing future enhancements. Our consultants are agile thinkers, devoted to fostering quality and innovation.This opportunity is available to residents of Argentina or Colombia with valid work authorization.

Cupid Media seeks a Senior Frontend Developer located in Argentina to help shape and enhance its online dating platforms. This position works closely with a collaborative team, contributing to projects that improve user experience and site features. Role overview This role centers on building new features and refining existing ones for Cupid Media’s suite of dating sites. Creative problem-solving and teamwork are important, as is the ability to deliver high-quality frontend solutions. What you will do Develop and improve user interfaces for online dating platforms Work with other developers and team members to deliver updates and enhancements Apply strong technical skills to solve challenges and optimize performance Requirements Based in Argentina Experience in frontend development at a senior level Strong problem-solving and collaboration skills

At Webflow, we are on a mission to empower everyone with development capabilities. As the leader in the Website Experience Platform (WXP), we are transforming how teams Build, Manage, and Optimize their web presence. By merging visual development, advanced content management systems, AI-powered personalization, seamless hosting, and comprehensive analytics into a single, cohesive platform, we are setting a new standard for digital experiences. With AI at our core, Webflow enables teams to accelerate their workflows, create high-performing digital experiences, and scale efficiently without the need for extensive engineering support. From independent designers and creative agencies to global enterprises, countless organizations harness Webflow to turn their innovative ideas into reality and unlock new possibilities on the web.We are excited to announce our new office in Buenos Aires, and we are looking for pioneering team members to join us. If you are not quite ready to apply or don’t see the right fit just yet, feel free to sign up here to receive updates on future opportunities and events with the Webflow team in Argentina.As a Staff Software Engineer on our eCommerce team, you will collaborate closely with Product, Design, Engineering, and Data Engineering teams to shape the development of our next-generation eCommerce platform. You will work across a diverse ecosystem of eCommerce tools and products, creating a premium customer experience. We are seeking an engineer who is passionate about scalable distributed systems architecture and delivering exceptional user experiences—someone eager to combine technical expertise with a visionary product approach that is foundational to Webflow’s platform.

As a Staff Software Engineer at NuPay, you will play a pivotal role in shaping our technology strategy and driving high-impact projects. We are seeking innovative minds who thrive in a collaborative environment and are passionate about solving complex problems. Join us in delivering cutting-edge solutions that enhance financial services for millions of customers.

Join Nubank as a Staff Software Engineer in Buenos Aires! In this pivotal role, you will contribute to developing innovative financial solutions that empower millions of customers. You'll work closely with cross-functional teams to design, implement, and maintain scalable systems.