Senior Backend Engineer – Python & AISiga leyendo para comprender completamente lo que este trabajo requiere en cuanto a habilidades y experiencia. Si su perfil encaja, presente su candidatura.About the roleWe are looking for aSenior Backend Engineerto join anAI Engineering teamwithin a large international technology environment.In this role, you will design, build, and operate robustPython backend servicesthat powerAI-enabled applicationsand reusable engineering capabilities across a complexenterprise ecosystem .This is a highly hands-onsenior individual contributorposition, focused on solving realproduction challenges , making soundarchitectural decisions , and turningAI and data-science capabilitiesinto secure, reliable, scalable, and maintainable software.You will take ownership ofbackend servicesfrom initialdesignthroughproduction operation , working closely withData Scientists, Product Managers, Platform Engineers, Security Specialists, and Architects .If you enjoy buildingproduction-grade Python services , designingAPIsanddistributed systems , working withAWS , and integratingAI/LLM capabilitiesinto real-world applications, this could be a great fit.What you’ll doDesign, build, and maintain scalablebackend servicesandAPIsusingPythonOwnbackend servicesend-to-end, fromarchitectureandimplementationthroughdeploymentandproduction operationIntegrateAI models ,Large Language Models (LLMs) , andMachine Learning servicesintoproduction systemsDefineservice boundaries ,data models ,persistence strategies , andintegration contractsDesign resilientdistributed systemswith appropriatefailure handling ,retries ,fallbacks ,rate limits , andasynchronous processingWork withrelational databases ,data modelling ,schema evolution , andpersistence strategiesDeploy and operatebackend servicesinAWS cloud environmentsDesign services withreliability ,security ,observability ,performance , andcostin mindHandle productionAI concernssuch aslatency ,structured outputs ,sensitive data ,model failures , andexternal API limitationsImproveautomated testing ,CI/CD pipelines ,monitoring ,dashboards ,logging , andalertingWork withDockerandKubernetesto containerise and operatebackend workloadsLead technical discussions,



challenge weakarchitectural approaches , and help reduce unnecessary complexityParticipate incode reviewsand help establish strongbackend engineering standardsMentor other engineers and sharesoftware engineering best practicesCollaborate closely withData Scientists, Product Managers, Platform Engineers, Security Specialists, and ArchitectsMust HaveTypically7+ years of experienceinBackend Software Engineering , althoughtechnical depth ,ownership , andimpactare more important than an exact number of yearsStrongPython software engineering skillsSolid experience designing and buildingbackend servicesandREST APIsStrong understanding ofsoftware architecture ,service boundaries ,distributed systems , andfailure handlingExperience withrelational databases ,data modelling , andschema evolutionHands-on experience deploying and operatingproduction servicesincloud environments , ideallyAWSStrong knowledge ofsoftware testingandengineering best practicesExperience withCI/CD pipelinesandproduction deployment processesSolid understanding ofobservability ,logging ,monitoring ,dashboards , andalertingExperience withDockerandKubernetesPractical understanding ofsecurity ,privacy ,sensitive data , anddata protection principlesStrongproblem-solving skillsand ability to make and explaintechnical trade-offsExperience working effectively acrossengineering, product, data, platform, and architecture teamsFluentEnglishandSpanishNice to HaveExperience withFastAPIHands-on experience withAWS servicesandcloud-native architecturesExperience withAmazon EKSFamiliarity withInfrastructure as Code , especiallyTerraformExperience withPostgreSQL ,Amazon Aurora , or similarrelational databasesExperience withasynchronous processingandevent-driven architecturesFamiliarity withqueues ,messaging systems ,



orevent-based integration patternsExperience withenterprise identity ,authentication , andauthorisationExperience integratingAI ,Machine Learning , orLLM capabilitiesintoproduction backend systemsFamiliarity with production concerns aroundLLM APIs , includinglatency ,rate limits ,retries ,fallbacks ,structured outputs , andobservabilityExperience incomplex enterpriseorlarge-scale digital environmentsHybrid model– 2 days onsite per week inViladecans, BarcelonaWhy join this project?People first– diverse and inclusive culture in an international environment.Buildproduction-grade backend systemsthat power realAI-enabled applicationsWork deeply withPython ,APIs ,distributed systems ,databases , andcloud-native technologiesGain exposure to real-worldAI and LLM integrationwithout moving away from hands-onsoftware engineering Work in anAWS-based environmentwith moderncloudandplatform engineering practices Influencearchitecture ,engineering standards ,reliability ,observability , andproduction qualityTake real ownership ofservicesandtechnical decisionsinstead of simply implementing predefined ticketsRemain hands-on while having meaningfultechnical influenceacross the teamHigh team stability and collaborative culture.€1200 per yeartraining budgetand continuous learning opportunities.Flexiblecompensation model .Privatehealth insuranceand benefits package. Flexible working hours andhybrid model .Wellhub : fitness, wellness, and mental health support. Football and paddle tennis teams sponsored byCapitole .Team buildings, integral events, and strongtech communities .Want to know more about us?Clickhereand discover all the details.Curious about our culture?Check out what people are saying about us onGlassdoor .We know that not every candidate will meet 100% of the requirements. If your profile doesn’t match perfectly but you believe you can add value, we’d still love to hear from you.Ready for the challenge? Apply now!Empowering People, Unlocking Innovation.Information Security NoticeThe employee will have access to confidential information related to Capitole and the assigned project. xsgfvud Compliance with internal security and information protection policies is mandatory.

📌 Senior Python Backend Engineer (Barcelona)
🏢 Capitole
📍 Barcelona