web3 fullstack engineer

Join one of Southern Europe's fastest-growing startups Confidential company is a Barcelona-based startup and one of Southern Europe's fastest-growing companies ranked #3 in the Sifted 100: Southern Europe ****, and we're just getting started.We're building the AI-native GTM platform for modern B2B teams, combining prospecting, enrichment, intent signals, AI...

We are looking for a Lead FullStack Engineer with strong backend expertise to help us build reliable, scalable, and high-quality products.You will lead a small engineering team consisting of 3 engineers and 2 QA specialists.This is a hands?on role requiring deep involvement in architecture, complex technical challenges, and production development.We expect...

Senior Software Engineer, Fullstack (Repayments UX) Remote Spain At Affinist we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most. The Repayment UX Engineering team is growing, and we're looking for a Senior Full-Stack Software Engineer. We're...

Capitole is seeking a Senior Fullstack Engineer with a strong frontend mindset to join an international project. You will contribute to the evolution of the central platform used by developers across the organization, focusing on modern frontend experiences, Backstage integrations, and cloud-native solutions. You will develop React-based UI components, build...

Seqera is seeking a Fullstack Software Engineer to join the Platform team. You'll work across the stack on the Seqera Platform, building APIs, data models, cloud integrations, and frontend features in Java, Groovy, Angular and Micronaut. The team is small and empowered; you'll own an area end to end, shape architecture, write tests, and collaborate with...

Tether is hiring a Fullstack Engineer to help QVAC application teams build, review, test, and deliver robust software. You’ll focus on desktop and mobile apps, AI harness, and skills packages, while creating developer tools and integrating AI agents into engineering workflows.You will own parts of the tooling roadmap, work with engineers to implement...

Software Engineer II, Fullstack (Repayment UX) Remote Spain At affirm, we exist for the moments that matter-giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most. The Repayment UX Engineering team is growing, and we're looking for a Full-Stack Software Engineer. We're a full-stack...

Senior Software Engineer, Fullstack (Repayments UX) Remote Spain At Affinist we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most. The Repayment UX Engineering team is growing, and we're looking for a Senior Full-Stack Software Engineer. We're...

Tether is hiring a Fullstack Engineer to help QVAC application teams build, review, test, and deliver robust software. You'll focus on desktop and mobile apps, AI harness, and skills packages, while creating developer tools and integrating AI agents into engineering workflows. You will own parts of the tooling roadmap, work with engineers to implement...

Quental busca una persona para el puesto Analista Programador/a Fullstack Java JEE / Angular. Integrarás una línea de proyectos tecnológicos estratégicos para evolucionar y mantener servicios y aplicaciones de la Administración Pública.Requisitos: experiencia en backend con Java JEE y APIs REST y en frontend con Angular, capacidad de trabajar con...

Ingeniero Full Stack con experiencia en backend (Python, Ruby, Java) y frontend (HTML, CSS, Bootstrap), que aprenderá Elixir. Contrato indefinido, trabajo híbrido/remoto, formación en Elixir y salario competitivo.

Capitole is hiring a Fullstack Engineer (Frontend-Oriented) with 4+ years of experience to drive frontend components and Backstage integrations within the joint team. You will contribute to the portal's technical advancement and collaborate across ARTs and organizational units.The role emphasizes React development, REST APIs, and enterprise IT experience,...

Affirm, Inc. is seeking a Software Engineer II, Fullstack (Repayment UX) to join a Europe-based team focused on reliable, scalable repayment experiences. The role operates from Spain with a remote-first policy, collaborating across product, design and analytics.Expect on-call rotations and opportunities to impact millions of users with high-scale financial...

We are knowmad mood! Somos una compañía líder en transformación digital, en constante evolución y a la vanguardia de la tecnología. Nacimos para provocar un cambio real a través de la innovación y el desarrollo sostenible, con la misión de aportar valor a los clientes e impulsar nuestro talento. Formado por más de 3.000 personas creativas,...

Seqera is hiring a Fullstack Software Engineer to join the Platform team. You’ll work across the stack on the Seqera Platform used to run Nextflow pipelines on cloud and HPC, mainly with Java, Groovy, Angular and Micronaut.The team is small, with broad scope, owning an area end to end and collaborating closely with Product and Infrastructure. You will be...

Aircall is a unicorn AI-powered communications platform transforming how teams win with customers. We bring voice, SMS, WhatsApp, and 250+ integrations together on one seamless workspace—so every customer conversation drives revenue, resolves issues faster, and builds trust. As a Senior Full-Stack Engineer on our Growth team, you will focus on Onboarding...

Parser Limited is seeking a Senior Fullstack Engineer in Spain with strong backend/API experience and a focus on microservices, security, and performance. You will collaborate with frontend teams to deliver robust, scalable applications and work across cloud platforms, containerization, and modern tooling.The role requires 8+ years in backend development and...

Software Engineer II, Fullstack (Repayment UX) Remote Spain At affirm, we exist for the moments that matter-giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most. The Repayment UX Engineering team is growing, and we're looking for a Full-Stack Software Engineer. We're a full-stack...

Moonfire is a small, fully remote team of senior engineers building Lingo.dev tools used by developers worldwide. You will design, develop, and scale web applications, open source tooling, and robust APIs with a focus on performance and UX. We value CS craft, remote collaboration, and ownership of features end-to-end. You'll work across frontend, backend,...

Parser Limited is seeking a Senior Fullstack Engineer in Spain with strong backend/API experience and a focus on microservices, security, and performance. You will collaborate with frontend teams to deliver robust, scalable applications and work across cloud platforms, containerization, and modern tooling. The role requires 8+ years in backend development...