Senior Backend Developer

Build the Core of AI-Driven Marketing Platforms

Who We Are
Keenfolks is a next-generation AI marketing agency , where technology, data, and strategy come together to build intelligent, scalable platforms for global brands.

We don’t just “use” AI — we design and build proprietary AI-powered systems that enable personalization, automation, and data-driven decision-making at scale. Our mission is to bridge the gap between marketing needs and emerging AI technologies, turning complex ideas into real-world impact.

We are a multidisciplinary team of engineers, data scientists, and strategists who value collaboration, ownership, and continuous learning.

Role Overview
We’re looking for a Senior Backend Developer to help design, build, and scale the backend services that power our AI-driven marketing platforms.

In this role, you’ll work hands-on developing robust backend systems, integrating AI and data pipelines, and ensuring our platforms are reliable, secure, and cloud-ready. You’ll collaborate closely with AI engineers, DevOps, and product stakeholders to deliver production-grade solutions used by international clients.

This role is adecuado for someone who enjoys deep backend work , modern architectures, and applying AI technologies in real products.

Key Responsibilities
Backend Development (≈70%)

Design, develop, and maintain RESTful and GraphQL APIs

Build backend services using Python (FastAPI, Flask) or Node.js

Implement and optimize data flows interacting with AI/ML models

Work with relational and non-relational databases (PostgreSQL, Redis, MongoDB)

Ensure code quality through testing, documentation, and code reviews

Optimize performance, scalability, and reliability of backend systems

Cloud, AI & Integrations (≈30%)

Deploy and manage backend services on AWS, Azure, or GCP

Containerize applications using Docker and orchestrate with Kubernetes

Support CI/CD pipelines using GitHub Actions, Terraform, or Bicep





Integrate with AI platforms and tools (OpenAI APIs, LangChain, vector databases)

Implement authentication, monitoring, and observability solutions

Collaborate with DevOps and architects on cloud and infrastructure decisions

Requirements
Must-Have

Strong experience with Python (FastAPI, Flask) or Node.js

Solid backend engineering experience in production environments

Experience working with PostgreSQL and Redis

Cloud experience on AWS, Azure, or GCP

Hands-on experience with Docker and basic Kubernetes

Familiarity with CI/CD pipelines and Infrastructure-as-Code concepts

Experience integrating APIs and external services

Advanced English (daily communication with international teams)

Nice to Have

Experience working with AI/ML tools (OpenAI API, LangChain, RAG pipelines)

Knowledge of dbt, Spark, or data processing pipelines

Experience with MongoDB or other NoSQL databases

Familiarity with monitoring and observability tools (Sentry, Prometheus, Grafana)

Understanding of authentication mechanisms (OAuth2, JWT)

Experience in fast-paced startup or scale-up environments

Your Mindset
At Keenfolks, we value backend engineers who:

Enjoy solving complex technical challenges

Care deeply about code quality, scalability, and security

Are curious about AI and modern backend architectures

Collaborate well with cross-functional teams

Take ownership and responsibility for what they build

What We Offer

Hybrid work model : 2 days in the office, 3 remote

Free lunch on office days

Daily snacks, coffee, and fruit ☕

Office activities: ping-pong, yoga & more ♀

30 days working from abroad

Birthday day off

23 vacation days + 2 personal days

A tech-focused environment with real AI applications in production

Opportunities to grow technically and work on cutting-edge platforms

Diversity Matters
We are committed to building an inclusive, diverse, and equitable workplace where everyone can grow, contribute, and make an impact. Different perspectives make better technology — and better teams.

📌 Senior Backend Developer (Ciudad de México)
🏢 The Keenfolks
📍 Ciudad de México