Senior Backend DeveloperBuild the Core of AI-Driven Marketing PlatformsWho We AreKeenfolks is a next-generation AI marketing agency, where technology, data, and strategy come together to build intelligent, scalable platforms for integral 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 OverviewWe'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 ResponsibilitiesBackend Development (≈70%)Design, develop, and maintain RESTful and GraphQL APIsBuild backend services using Python (FastAPI, Flask) or Node.JsImplement and optimize data flows interacting with AI/ML modelsWork with relational and non-relational databases (PostgreSQL, Redis, MongoDB)Ensure code quality through testing, documentation, and code reviewsOptimize performance, scalability, and reliability of backend systemsCloud, AI & Integrations (≈30%)Deploy and manage backend services on AWS, Azure, or GCPContainerize applications using Docker and orchestrate with KubernetesSupport CI/CD pipelines using GitHub Actions, Terraform,



or BicepIntegrate with AI platforms and tools (OpenAI APIs, LangChain, vector databases)Implement authentication, monitoring, and observability solutionsCollaborate with DevOps and architects on cloud and infrastructure decisionsRequirementsMust-HaveStrong experience with Python (FastAPI, Flask) or Node.JsSolid backend engineering experience in production environmentsExperience working with PostgreSQL and RedisCloud experience on AWS, Azure, or GCPHands‐on experience with Docker and basic KubernetesFamiliarity with CI/CD pipelines and Infrastructure-as-Code conceptsExperience integrating APIs and external servicesAdvanced English (daily communication with international teams)Nice to HaveExperience working with AI/ML tools (OpenAI API, LangChain, RAG pipelines)Knowledge of dbt, Spark, or data processing pipelinesExperience with MongoDB or other NoSQL databasesFamiliarity with monitoring and observability tools (Sentry, Prometheus, Grafana)Understanding of authentication mechanisms (OAuth2, JWT)Experience in fast-paced startup or scale‐up environmentsYour MindsetEnjoy solving complex technical challengesCare deeply about code quality, scalability, and securityAre curious about AI and modern backend architecturesCollaborate well with cross‐functional teamsTake ownership and responsibility for what they buildWhat We OfferHybrid work model : 2 days in the office, 3 remoteFree lunch on office daysDaily snacks, coffee, and fruitOffice activities: ping-pong, yoga & more30 days working from abroadBirthday day off23 vacation days + 2 personal daysA tech‐focused environment with real AI applications in productionOpportunities to grow technically and work on cutting‐edge platformsDiversity MattersWe 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.
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📌 Senior Backend Developer (Xico)
🏢 The Keenfolks
📍 Xico