Senior Fullstack Engineer: AI-Driven FinTech (Remote)

Techunting; Santa Fe Capital; Remote; ARS 181,747,000 - 242,329,000; Full time

Benefits offered by this job

Contractor agreement with payment in ?

100% remote work

Argentina's public holidays

English classes

Referral program

Access to learning platforms

Job summary

Darwoft is seeking a Senior Fullstack Engineer with a strong frontend focus to join a high-impact international FinTech project. You will design and ship agent-facing experiences using React and TypeScript within a modular frontend architecture, collaborating with backend services and product teams.

You’ll embrace an agentic development mindset, leveraging AI coding assistants and automation to prototype faster, validate code, and improve testing and debugging while maintaining ownership and

Qualifications

• Minimum 8 years in software engineering with frontend focus.
• Strong React and TypeScript experience.
• Experience using AI development tools in production.
• Ability to design complex frontend UIs and multi-step workflows.
• English proficiency in advanced level.

Responsibilities

• Design, develop, and maintain React/TypeScript features across CX domain modules, including operations tooling, agent presence, inbox workflows, queues, assignments, and internal applications.
• Build and evolve reusable UI components, forms, tables, filters, dashboards, and complex operational workflows.
• Work with technologies and patterns including Tailwind CSS, Tremor, Radix/shadcn, and Storybook.
• Apply AI-assisted and agentic software engineering practices to accelerate prototyping, implementation, testing, refactoring, documentation, and debugging.
• Experiment with AI coding agents and automated workflows to improve engineering productivity and development quality.
• Build data-driven interfaces using TanStack Query, React Router, react-hook-form, and Zod.
• Integrate frontend applications with BFF and backend APIs.
• Work within a micro-frontend architecture using Rspack and Module Federation, respecting domain boundaries and monorepo conventions.
• Collaborate on API design and integration with FastAPI backend services, including OpenAPI contracts and BFF endpoints.
• Ensure end-to-end correctness across workflows involving queues, agents, assignments, conversations, and operational metrics.
• Contribute to authorization-aware UX aligned with gateway permissions and domain-level capability models.
• Troubleshoot issues across the frontend BFF backend stack using both traditional debugging techniques and AI-assisted workflows.
• Ensure the reliability, accessibility, and performance of agent-critical workflows running in production.
• Participate in code reviews, architecture discussions, technical decision-making, and engineering best practices around type safety, linting, testing, and maintainability.

Skills

8+ years experience

React

TypeScript

Advanced English

Frontend architecture

Collaboration with stakeholders

Tools

Cursor

Claude Code

GitHub Copilot

AI-assisted specifications

AI coding agents

TanStack Query

React Router

react-hook-form

Zod

BFF / FastAPI integration

FastAPI

Rspack

Module Federation

Tailwind CSS

Tremor

Radix/shadcn

Storybook

Webpack / Vite

OpenAPI

PostgreSQL

Job description

Darwoft is seeking a Senior Fullstack Engineer with a strong frontend focus to join a high-impact international FinTech project. You will design and ship agent-facing experiences using React and TypeScript within a modular frontend architecture, collaborating with backend services and product teams.

You’ll embrace an agentic development mindset, leveraging AI coding assistants and automation to prototype faster, validate code, and improve testing and debugging while maintaining ownership and