Senior Back End Developer

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Start Date : ASAP

Location : Anywhere in LATAM

Contract Length - 6 months initially

Contract Type : Freelance / B2B / Contract

Senior Backend Developer (NestJS / Digital Banking Platform)

Position Overview

We are seeking a Senior Backend Developer with 10+ years of experience and deep expertise in NestJS, API architecture, and multi-tenant systems to join our team. You will lead backend development for a next-generation digital banking platform , enabling account creation, secure transfers, real-time dashboards, and deposit tracking.

This is a hands-on leadership role for an engineer who thrives in fast-paced environments, challenges assumptions, and mentors a young and ambitious engineering team while driving backend excellence.

Key Responsibilities

Backend Development & Architecture

Design, build, and optimize scalable multi-tenant APIs for a digital banking system.

Implement secure account creation, transfers, and real-time banking dashboards.

Lead API architecture discussions, testing (unit, integration, e2e), and deployments.

Leadership & Mentorship

Mentor and coach a growing engineering team, instilling best practices in backend systems.

Facilitate code reviews, technical discussions, and knowledge-sharing sessions.

Challenge existing approaches and propose better architectural and technical solutions.

Event Streaming & Observability

Drive the adoption of event streaming (Kafka) for real-time transaction processing.

Implement strong monitoring, logging, and observability with tools such as Datadog or Grafana.

Collaboration & Delivery

Work closely with frontend engineers (React / Next.js, React Native) to deliver seamless banking experiences.

Contribute to onboarding processes by setting up tools, frameworks, and engineering standards.

Collaborate cross-functionally with stakeholders to ensure reliable and timely delivery.

Requirements

10+ years of experience in backend development.

Deep expertise with NestJS (architecture, testing, and production deployment).

Strong background in multi-tenant API systems and scalable backend architectures.

Experience in financial services or digital banking is highly desirable.

Hands-on experience with Kafka or similar event streaming platforms.

Knowledge of observability tools such as Datadog, Grafana .

Strong leadership, mentoring, and coaching skills.

Excellent communication skills in both English and Spanish .