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 ideal 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. Want to Know More? Follow us on LinkedIn \& Instagram to explore our culture, values, and the people behind our AI\-powered innovation.