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# Staff Fullstack Developer (Typescript + Node.Js)

- **Company:** Shakers
- **Location:** Guntín, Spain (Remote available)
- **Contract:** Temporary contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, BigQuery, Cursor (Graphical User Interface Elements), Node.Js, TypeScript, Google Cloud, Data Ingestion, Backend, Kubernetes, Front End Software Development
- **Published:** August 16, 2026
- **Apply:** https://www.buscojobs.com.es/staff-fullstack-developer-typescript-node-js-en-guntin-ID-367561003

## About the Role

? Must-have 5+ years shipping production-scale software Strong proficiency in TypeScript 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.

## Description

Senior Developer (TypeScript + Node.js) - Fintech - 100% Remote At 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 an AI Builder - someone who has genuinely adopted AI in their daily engineering workflow and can become an internal reference across the team.What you'll do Design, 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-have 5+ years shipping production-scale software Strong proficiency in TypeScript 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.Conditions 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.


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