Senior Engineer (React/Next.js/React Native/Node.js)

We’re looking for a Senior Full-Stack Engineer to join a B2B SaaS platform with a mobile-first experience and a distributed backend architecture, where performance, data processing, and scalability are critical to the product’s success.
This is a great opportunity to work on a complex, real-world product used across multiple regions, contributing not only with code but also with technical decisions and product evolution.
What you’ll do
Design and build scalable features across frontend, mobile, and backend layers

Contribute to architectural decisions and system design

Work closely with product and engineering stakeholders

Optimize performance and data-intensive workflows

Collaborate within a distributed team, bringing a proactive and ownership-driven mindset

Tech Stack
You’ll be working with a modern, distributed stack:
Frontend: React, Next.js, React Native (Expo)

Backend: Node.js (Bun), GraphQL, REST

Database: MongoDB (complex modeling, read-heavy workloads)

Infrastructure: Google Cloud Platform (GCP), Docker, Kubernetes

Infrastructure as Code: Terraform, Ansible

Messaging: NATS

CI/CD: Jenkins + GitHub

Testing: Unit, Integration, End-to-End (Playwright)

What we’re looking for
Strong experience as a Full-Stack Engineer in modern web/mobile environments

Solid understanding of scalable systems and distributed architectures

Product-oriented mindset and ability to navigate complex systems

Proactive, autonomous, and comfortable taking ownership

Strong communication and collaboration skills in remote environments

Advanced English is required, as you’ll work directly with US-based clients in a fully collaborative environment.
✨ What we offer
20 days of paid time off per year

Flexible working hours (we care about results, not clocking in)

Remote-first culture

Health insurance + fitness benefit

Learning & development support

In-company English classes

Internal knowledge-sharing sessions

A collaborative, friendly, and human-centered team environment

About VAIRIX
VAIRIX is a nearshore software development company that partners with startups and growing organizations to build high-quality software and scale engineering teams.
We work in real-time with U.S. clients, combining a boutique approach with strong technical expertise, fast onboarding, and a focus on long-term collaboration.
Want to join us?
If you're looking for a place where people matter as much as code — this might be it. Let’s talk.