Senior Full-Stack Engineer — Fintech Platform

Devsu; Argentina; On-site; ARS 1,200,000 - 2,100,000; Full time

Benefits offered by this job

Paid holidays

Vacation days

Health allowance

Annual learning budget

Company-provided computer

Job summary

Devsu is seeking a Full-Stack Software Engineer to join the Digital Platforms Engineering team. You will work across backend services and frontend applications supporting onboarding, transaction management, compliance workflows, and internal tools for a leading digital currency platform.

You will design, build, and operate secure, scalable systems in a regulated environment, collaborating with product, design, and operations to deliver reliable end-to-end solutions.

Qualifications

• 3+ years of experience as a software engineer working across frontend and backend systems.
• Strong experience building backend services in Go and/or Java.
• Proficiency with Node.js and TypeScript v5.
• Experience building frontend applications with Next.js, React, and TypeScript.
• Solid understanding of RESTful API design.
• Strong SQL skills and hands-on experience with PostgreSQL.
• Experience working in AWS environments.
• Familiarity with microservices and distributed backend systems.
• Experience with Kubernetes, Helm, and Terraform.
• Experience with monitoring and observability platforms such as Grafana.
• Experience debugging with VS Code and/or Cursor.

Responsibilities

• Design, build, and maintain full-stack features across frontend applications and backend services.
• Develop and maintain backend APIs that support onboarding, authentication, transaction lifecycles, and operational workflows.
• Build and enhance customer-facing and internal web applications.
• Integrate systems with third-party services and external providers.
• Implement secure authentication and authorization using OAuth 2.0 flows.
• Deliver scalable backend capabilities within a microservices environment.
• Ensure applications meet high standards for security, performance, reliability, and observability.
• Participate in code reviews, technical design discussions, and architecture decisions.
• Write and maintain clear technical documentation.

Skills

Go

Java

TypeScript

Next.js

React

REST APIs

PostgreSQL

AWS

Kubernetes

OAuth2

CI/CD

Git

Tools

Terraform

Helm

CI/CD

Git

Job description

Devsu is seeking a Full-Stack Software Engineer to join the Digital Platforms Engineering team. You will work across backend services and frontend applications supporting onboarding, transaction management, compliance workflows, and internal tools for a leading digital currency platform.

You will design, build, and operate secure, scalable systems in a regulated environment, collaborating with product, design, and operations to deliver reliable end-to-end solutions.