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 .