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 (Xico)
🏢 The Keenfolks
📍 Xico