Build functional prototypes and product experiments directly in the Thunderbolt codebase, translating ambiguous ideas into clear, usable product experiences.
Help define interaction patterns for AI-powered chat, search, workflow automation, and enterprise administration.
Contribute production-quality front-end code, reusable components, and design-system elements to improve usability, accessibility, and polish.
JavaScriptTypeScriptUI/UX DesignPrototypingAI-assisted Development
Design and develop responsive frontend interfaces for web applications using ReactJS, CSS, JavaScript, and TypeScript.
Translate user requirements into intuitive UI/UX concepts, wireframes, and prototypes.
Collaborate with backend developers and AI specialists to align frontend solutions with technical capabilities.
The partner company is a technology organization focused on AI and automation solutions. It offers a collaborative, remote-first environment with modern technologies and multidisciplinary teams.
Build intuitive front-end interfaces and design seamless UX flows.
Implement application logic and integrate APIs, supporting backend needs.
Contribute to web application delivery with strong problem-solving skills.
Software Mind develops impactful solutions for global companies, working with tech giants and unicorns on transformative projects. The culture embraces openness, respect, and growth, with cross-functional teams that combine employment with enjoyment.
Build complex, interactive UI components, screens, and workflows.
Turn product and design concepts into polished, production-ready interfaces.
Quadcode is a fintech company delivering advanced financial products and a SaaS trading platform for brokers. With a team of 500+ across the globe, it develops innovative AI tools and offers a creative, friendly atmosphere.
Build production-quality components and interactions across WorkOS products.
Prototype concepts, build new products, and experiment with new interaction patterns.
Raise the quality of WorkDS, our design system, by improving performance, state, accessibility, and interaction behavior.
WorkOS builds modern developer tools and APIs that make it easy for companies to become Enterprise Ready. The company recently raised a $100M Series C (valuation $2B) and powers enterprise features for fast-growing AI companies like OpenAI and Cursor.
Design and build user-facing systems and integrations for secure, next-gen interfaces.
Own the frontend experience layer, converting complex operator requirements into reliable UIs.
Work hands-on building and operating systems in partnership with product designer and engineering teams.
Ruya AI is a venture-backed defense-tech company building AI-native intelligent software for sovereign institutions. They are headquartered in Massachusetts with offices across the US, Europe, and the Middle East, and are expanding their engineering team with people who demonstrate strong ownership and judgment.
Work directly with client teams to understand complex workflows and identify opportunities for AI automation.
Build, deploy, and maintain production solutions integrating with TMS, WMS, and ERP platforms.
Tune AI agents and automated workflows using production data to continuously improve performance.
The company specializes in AI-driven automation and enterprise integrations for logistics and supply chain operations. It is a growth-stage, fast-moving environment that values speed, pragmatism, and ownership.
Develop and maintain web applications using modern technologies across frontend and backend.
Use AI tools like Claude, Cursor, and GitHub Copilot to improve productivity and code quality.
Collaborate with designers, product owners, and other developers in a structured international environment.
Lasting Dynamics is an award-winning international software development company specializing in custom engineering, SaaS platforms, and mobile apps. Founded in Italy in 2015, it has grown into a remote-first team across Europe, Norway, and the Middle East, focusing on long-term partnerships and quality over volume.
Design, build, and iterate on a high-impact healthcare application using TypeScript and React.
Serve as the technical anchor for the frontend team, guiding architecture decisions and championing quality.
Integrate WCAG and Section 508 accessibility standards and use AI coding tools to accelerate development.
Oddball believes that the best products are built when companies understand and value the things they are working on. We value learning and growth and the ability to make a big impact at a small company, improving the daily lives of millions by bringing quality software to the federal space.
Design and develop high-quality applications using React, JavaScript, and TypeScript for enterprise clients.
Collaborate with distributed teams and clients to transform complex requirements into innovative solutions.
Apply modern AI frameworks and best practices to enhance software delivery and engineering productivity.
Our partner specializes in designing and delivering high-quality digital products for enterprise clients. They foster a collaborative and technology-driven remote culture with a focus on innovation and work-life balance.
Lead and mentor a fullstack engineering team while contributing hands-on to the codebase.
Collaborate with product, design, QA, and backend teams to deliver high-performance user interfaces.
Drive technical strategy, architecture, and integrate AI-assisted development workflows to boost productivity.
Kayzen is a mobile demand-side platform (DSP) that democratizes programmatic advertising for leading apps, agencies, and brands. With over 160B daily ad requests and a global team spanning multiple countries, they foster a culture of ownership, continuous improvement, and innovation.
Own the consistency and quality of core flag surfaces across teams, setting direction for shared interactions and ensuring a coherent experience.
Set the agenda from customer evidence, working closely with design and product to prioritize improvements.
Build and maintain shared frontend foundations including the design system, interaction primitives, and performance standards.
LaunchDarkly provides a feature management platform that helps developers control feature rollouts and manage software releases. The company values transparency and collaboration, and is committed to diversity and inclusion.
Own the web client for a global learning platform serving learners, teachers, staff, and enterprise reps.
Build with React and TypeScript, co-design API contracts, and own the release pipeline end-to-end.
Work 100% remotely with European time zone preference, using AI tools like Claude Code daily.
Berlitz is a global language education company with nearly 150 years of expertise, building a new online learning platform for languages and skills. They foster an inclusive culture and offer a remote, autonomous work environment with high impact across the organization.
Own and evolve a modern design system spanning components, tokens, documentation, and tooling.
Build AI-friendly, accessible components with React and TypeScript, ensuring WCAG 2.2 AA compliance.
Collaborate across design, product, and engineering teams to drive adoption and shape technical direction.
The company is a technology firm focused on AI-assisted development and advanced AI products. It fosters a collaborative, remote-first culture with an emphasis on engineering quality, autonomy, and continuous learning.
Develop new features for existing web funnels and single page applications for web2app flows.
Integrate analytics systems, A/B testing, and payment systems into web applications.
Use modern JavaScript (ES6+), TypeScript, React, and styled-components to build maintainable code.
Gismart is a value-driven mobile app developer specializing in Health & Wellness, Utilities, and Music apps, with over 1 billion downloads globally. Our team of over 350 diverse professionals across Europe fosters creativity and innovation in a supportive, values-driven culture.
Build new product features end-to-end, from rapid prototypes to scalable production implementations.
Develop and enhance AI-powered product capabilities by integrating new data sources, tools, and workflows.
Create complex React-based interfaces that are performant, reliable, maintainable, and well tested.
The company develops AI-powered tools and knowledge management experiences for teams worldwide. It is a remote-first organization with a collaborative culture focused on trust and ownership.
Develop a deep understanding of the Mastra framework and platform, including how different features work together and which interaction patterns best support each use case.
Continuously research emerging interaction patterns, developer tools, and best-in-class products to inform your work.
Think from the perspective of a developer and identify the highest-impact opportunities to improve the user experience across Mastra Studio and the Mastra Cloud platform.
Mastra is the open-source TypeScript framework for building AI agents. With $35M raised and 25k+ GitHub stars, it's a small, fully remote team shipping fast across North American and European time zones.
Drive prompt-to-prototype workflows using AI tools to translate user needs into functional prototypes and high-fidelity interfaces.
Own end-to-end UX for deployment, configuration, and accreditation workflows in the customer application.
Conduct user research with warfighters and commercial providers to validate design decisions and uncover pain points.
Second Front Systems is a public-benefit software company powering software for the free world, eliminating friction in development for government networks. Built by national security veterans and backed by top-tier venture capital, it has a fast-paced, mission-driven culture.
Define and implement the design system with the product team to enhance UI/UX across the platform.
Collaborate closely with product to design beautiful user experiences and ship features across the React/TypeScript/Tailwind frontend.
Own your work, collaborate with engineering and customer success, and continuously improve the app.
BoWatt builds agentic requirements and systems engineering software for manufacturing, aiming to achieve PhD-level engineering capability with AI in the next decade. The company was bootstrapped to €500k+ ARR before raising its first round and is backed by tier-1 investors, with a small team of startup builders focused on speed and execution.
Design, develop, and maintain full-stack features using React, TypeScript, Node.js, and GCP.
Collaborate with technical leadership and cross-functional teams to shape product roadmap and engineering standards.
Contribute to AI-focused initiatives and establish best practices in a fully remote environment.
This role is listed on behalf of a partner company, an AI-native fintech SaaS environment focused on modern financial planning and analysis. They are a growing organization with a ground-floor opportunity, emphasizing collaboration and a strong engineering culture.
Design, develop, and optimize user experiences across consumer applications and internal healthcare platforms using Next.js, React, and TypeScript.
Build AI-powered user experiences including conversational interfaces and streaming AI responses, leveraging tools like Cursor, GitHub Copilot, and Claude.
Collaborate with cross-functional teams, contribute to shared component libraries, and ensure performance, accessibility, and security standards.
They build modern digital healthcare experiences using cutting-edge frontend technologies and AI-powered development workflows. They are a remote-first organization focused on ownership and autonomy, with a collaborative team of experienced professionals.