Staff Fullstack Developer (Typescript + Node.Js) - Tarragona

Senior Developer (TypeScript + Node.js) - Fintech - 100% RemoteAt this company, everyone in tech carries the "Tech Generalist" title on purpose: no one is only frontend, only backend, or only data.Every engineer has a specialization but works across the stack.Engineers pick up projects end-to-end and rotate between initiatives rather than staying in silos.We are actively looking for this hire to be anAI Builder- someone who has genuinely adopted AI in their daily engineering workflow and can become an internal reference across the team.?What you’ll doDesign, develop, and maintain end-to-end systems (frontend and backend) - supporting customer-facing workflows and internal backoffice operations.Evolve the architecture for scalability, reliability, and security, making pragmatic tradeoffs between speed and long-term maintainability.Design and maintain the platform’s core financial systems: payment orchestration, ledger infrastructure, underwriting engines, reconciliation pipelines, and real-time deal tracking.Business-critical with strong guarantees on correctness, traceability, and auditability.Integrate third-party financial APIs (Taktile, Modern Treasury, Kantox) to automate data ingestion, risk evaluation, and cash movement workflows.Raise the team’s bar through thoughtful system design, high-quality code reviews, and mentorship - including acting as an internal reference on AI-assisted engineering.?Must-have5+ years shipping production-scale softwareStrong proficiency inTypeScript and Node.js.Systems thinker: sees patterns across the stack, designs solutions that scale beyond a single use case.AI-native engineer- actively builds with AI tools (Claude Code, Cursor, Codex or similar) and can articulate how and why.Pragmatic and business-impact oriented, balancing quality, speed, and simplicity.Comfortable in a remote-first, distributed environment with full ownership.Fluent English (working language of the team).?Nice to haveExperience in fintech, credit risk modeling, or high-volume payment processing.Background as a startup founder or early-stage engineer.Familiarity with Kubernetes, BigQuery, or Google Cloud Platform.?ConditionsEngagement: freelance via Shakers, 12 months with strong likelihood of extension.Location: 100% remote.Remote-first autonomy, trust in the team to manage time and impact.High standards, low ego culture.Impact at scale - your work empowers thousands of founders.At Shakers we handle project management, invoicing, and support throughout the engagement.You focus on building robust financial systems with AI-native ways of working.

?Must-have 5+ years shipping production-scale software Strong proficiency inTypeScript and Node.js. Systems thinker: sees patterns across the stack, designs solutions that scale beyond a single use case. AI-native engineer- actively builds with AI tools (Claude Code, Cursor, Codex or similar) and can articulate how and why. Pragmatic and business-impact oriented, balancing quality, speed, and simplicity. Comfortable in a remote-first, distributed environment with full ownership. Fluent English (working language of the team). ?Nice to have Experience in fintech, credit risk modeling, or high-volume payment processing. Background as a startup founder or early-stage engineer. Familiarity with Kubernetes, BigQuery, or Google Cloud Platform.

Engagement: freelance via Shakers, 12 months with strong likelihood of extension. Location: 100% remote. Remote-first autonomy, trust in the team to manage time and impact. High standards, low ego culture. Impact at scale - your work empowers thousands of founders. At Shakers we handle project management, invoicing, and support throughout the engagement. You focus on building robust financial systems with AI-native ways of working.