pulliAPI lifecycle: versioning, rate limiting, observability /li /ulh3Job title: Backend Engineer /h3h3Team: Product /h3h3Location: Hybrid work model from Madrid, Spain /h3h3About Us /h3pIn b10 years /b, all companies will operate a bnon-financial system /b. As we see it, it’s either bDcycle or bust /b. /ppSustainability should not be a cosmetic exercise. bDcycle /b is the startup born to make that happen. /ppAmidst the regulatory, financial, and technical maze that has attempted to equate sustainability with bNon-Financial Statements /b, the industry has made access to information more complex. When faced with a black box, the keyholder becomes indispensable. In this context, the only way to elevate sustainability to the level it deserves is by adding btransparency /b and eliminating all the bbullshit /b. /ppAt bDcycle /b, we are determined to fulfill a mission: bgiving companies control over sustainability /b. /ppAnd we are building an bamazing team /b to make it happen. /ph3What You’ll Do /h3h3As a Backend Engineer, You Will /h3ulliDesign and implement scalable, secure, and maintainable backend services with high-quality code. /liliBuild robust solutions using Python (2-4 years of experience), with a strong focus on best practices and clean architecture. /liliDevelop microservice solutions using RESTful APIs and event-driven systems (e.g., gRPC, Kafka, SQS), ensuring alignment with product requirements and technical excellence. /liliContribute to CI/CD pipelines (GitHub Actions, AWS CodePipeline) to guarantee reliable deployments and efficient development workflows. /liliWork with AWS cloud-native infrastructure, leveraging services like EC2, ECS, Lambda, RDS, DynamoDB to deliver scalable products. /liliApply infrastructure-as-code principles using CloudFormation and CDK to maintain consistency and security across environments. /liliImplement system design patterns, including domain-driven design, CQRS, and event sourcing, where they create clear value. /liliCollaborate cross-functionally with DevOps, Data, Design, and frontend teams to deliver high-impact features and improvements. /liliUse AI and Claude as daily work tools: for debugging, documentation, preparing new features, understanding legacy code, exploring solutions, etc. We’re looking for someone who sees this as a competitive advantage, not a threat. /liliDrive technical excellence, performance, and reliability in everything you build, contributing to a culture of continuous improvement. /liliSupport and learn from team members while taking full ownership of your deliverables. /li /ulh3How We Work with AI /h3ulliWe use Claude for real-time debugging, identifying issues faster and understanding complex system behaviours. /liliWe document with AI: we generate and maintain up-to-date technical documentation, reducing friction. /liliWe prepare new features: we explore architectures, discuss trade-offs, and prototype faster. /liliWe understand code: onboarding to new parts of the codebase, refactoring,



and impact analysis are accelerated with AI as a copilot. /li /ulh3We’re Looking For Profiles Who /h3ulliHave genuine curiosity about how AI can amplify their work, not replace it. /liliWant to go deeper with these tools, experiment, and share learnings with the team. /liliCombine classic technical rigor (testing, architecture, fundamentals) with openness to new ways of doing things. /li /ulh3Tech Stack Responsibilities /h3h3Core Backend DevOps /h3ulliPython (intermediate-advanced level) /liliREST/gRPC APIs messaging queues /liliTesting frameworks (pytest, unittest) with TDD/BDD methodologies /liliCI/CD with GitHub Actions, CodePipeline, containerization via Docker, ECS, Fargate, EKS /liliDebugging and performance optimisation in staging and production /liliAWS Cloud Architecture: EC2, ECS, Lambda, API Gateway, Route 53, ELB /liliDatabases: PostgreSQL, RDS, DynamoDB, Aurora /liliEvent-driven design using SQS, SNS, Step Functions, EventBridge /liliInfrastructure as Code: CDK, CloudFormation /liliSecurity: IAM, KMS, encryption, least privilege, secret management /liliMonitoring Compliance: CloudWatch, X‑Ray, AWS Config, ISO 27001 understanding /li /ulh3Software Architecture System Design /h3ulliHighly available, distributed system design /liliDomain-driven design, service boundaries /liliTrade-off analysis and cost‑aware architectural decisions /li /ulh3Data API Strategy /h3ulliSQL/NoSQL schema design, indexing, migrations (Alembic) /liliAPI lifecycle: versioning, rate limiting, observability /liliIdempotency, consistency, and secure access patterns /li /ulh3Ownership Collaboration /h3ulliEnd‑to‑end ownership of backend projects /liliParticipate in technical reviews and knowledge sharing /liliPromote engineering best practices and documentation /li /ulh3Who You Are /h3ulliStrong problem‑solver with a total ownership mentality /liliAutonomous, curious, and impact‑driven: you don’t wait to be told what to do—you identify problems and propose solutions /liliYou have 2‑4 years of backend experience, but act with the autonomy of someone with more mileage /liliSolid communication skills, written and verbal /liliPassionate about clean, testable, and scalable code /liliCurious about AI and new tools: you see Claude and similar tools as productivity multipliers /liliYou want to learn and experiment with modern approaches to product development /liliCollaborative and proactive with a great sense of humour /li /ulh3What We’re NOT Looking For /h3ulliProfiles who think “this is how it’s always been done” /liliPeople who see AI as a threat or distraction /liliEngineers who just want to execute tickets without questioning or proposing /li /ulh3What We ARE Looking For /h3ulliStructured and technically solid mindset, but open to new ways of working /liliSomeone who combines classic fundamentals with modern product thinking /liliBrutal agency: ability to make decisions, unblock problems, and move fast without sacrificing quality /li /ulh3What We Offer /h3ulli23 vacation days /lili7 days of team‑building per year /liliCobee card for added flexibility /liliSubsidised training for continuous development /liliCompetitive gross annual salary depending on experience /liliBased in Madrid, Spain /lili3 onsite + 2 remote days as a baseulli+1 remote day for moms and dads with 0–6 yo children /lili+1 remote day if commuting takes longer than 1h (Google Maps base) /li /ul /lili1‑1s will be mandatory onsite /liliGeneral All Hands will be mandatory onsite /liliFull remote (optional) from the end of the summer team‑building up to the warm‑up week /liliFull remote (optional) from Dec 23rd to Jan 6th (both included) /li /ulh3HOW WILL YOU DO IT? /h3pAt bDcycle /b, we take inspiration from models like bLa Masía at FC Barcelona /b, one of the most prestigious and recognised football academies in the world. /ppIts success lies in a bholistic approach /b that combines a clear playing philosophy, an innovative methodology, and a long‑term commitment to the btechnical /b, btactical /b and bpersonal development /b of its players. /ppAt bDcycle /b, we embrace a blong‑term vision /b and a comprehensive development philosophy. We are not just looking for immediate results, but for people with the potential and determination to make a difference. We prioritise professionals who share our mission: bgiving companies control over sustainability /b. /ppWe don’t just evaluate technical skills or past achievements; we focus on individuals with bcuriosity /b, bcritical thinking /b, and a commitment to continuous learning. We want people who don’t just complete their tasks but challenge ideas, bring new perspectives, and drive change. /ph3The People Who Belong In Dcycle Are /h3ulliWe believe in agency. Agency is significantly more powerful and significantly more scarce than intelligence. /liliWe fix what’s broken → with ownership, autonomy, and responsibility. /liliWe take humour seriously → spending time together is a pleasure. /liliIntelligent → we learn quickly, are versatile, and technically brilliant at something. /li /ulh3The People Who Belong In Dcycle Act /h3ulliWith confidence → whether acting autonomously or seeking opinions and getting involved; we value feedback as the only way to grow. /liliGuided by metrics → we rely on key metrics to evaluate our efforts. /liliClose to the customer → we maintain constant, iterative conversations with our customers and prospects to learn from our experiments (both about the problems and the solutions we create). /liliBy taking risks → we understand that failure is the price of learning. /li /ul /p #J-18808-Ljbffr

📌 Backend Engineer (Madrid)
🏢 Dcycle
📍 Madrid