> Markdown version of [/jobs/ext/2131847-vacancy-software-engineer](https://www.wearedevelopers.com/jobs/ext/2131847-vacancy-software-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Vacancy: Software Engineer - **Company:** Taizen - **Location:** Madrid, Spain - **Contract:** Permanent contract - **Skills:** Artificial Intelligence, Amazon Web Services, Amazon Cloudfront, Amazon Elastic Compute Cloud, Amazon S3, Continuous Integration, Software Debugging, Github, Python (Programming Language), PostgreSQL, MongoDB, Node.Js, Prometheus, Salesforce.Com, TypeScript, Web Applications, ReactJS, Amazon ElastiCache, Grafana, Backend, Amazon Relational Database Service, Slack, Front End Software Development, Hubspot - **Published:** August 19, 2026 - **Apply:** https://www.buscojobs.com.es/vacancy-software-engineer-en-madrid-ID-367804893 ## About the Role Frontend: ReactBackend: two services, a Node/TypeScript core and a Python agent serviceRetrieval: our own vector store written in Rust, SOTA late-interaction retrievalData: Postgres + MongoDBInfra: AWS (RDS, EC2, CloudFront, S3, ECR, ECS, ElastiCache, Lambda), MongoDB Atlas, Grafana + Prometheus, GitHub ActionsShip features end-to-end, from customer problem to design, deployment, and iteration - architecture decisions includedBuild reliable backend services and workflows behind the agentsBuild product surfaces across the web app and SlackWork on data models and infrastructure that handle very different data types, tuned for fast reads and writesOwn quality: testing, monitoring, observability, and incident responseCI/CD, deployments, and infrastructure hygieneCS degree, Bachelor's or Master's, or equivalent~4+ years shipping production software on a product team where you've owned something. xbhjioe Side projects are a bonus and can compensate for lack of experience~ Comfortable with TypeScript/React and Python/Node, or quick to pick them up~ Some hands-on time with CI/CD, deployments, and observability, and up for owning more here~ High agency and happy working on a small, cross-functional teamWhy you'll like it hereAlmost unlimited token budgetHay opciones de teletrabajo/trabajo desde casa disponibles para este puesto. ## Description Join us as a Software Engineer to build the AI execution layer where go-to-market agents do the work, not just answer questions.Our AI agents connect to tools like Gong, Salesforce, HubSpot, and Slack, then proactively run recurring workflows without waiting to be prompted.We're early-stage, so the risk is real: timelines move, and equity is worth what the company becomes, not what it's valued at today.Here's why we think it's worth it.We're two ex-Spotify engineers who've shipped and scaled software used by millions, funded, and building with real customers every week.There's also a shift worth betting on.What they can't do is untangle a vague problem, design a data model that holds up under real usage, or debug something failing in a way nobody expected.After a few years in the job, the thing that sets you apart isn't how fast you type, it's your judgment, and that's exactly what this role leans on.Competitor moves, deal objections, buyer feedback, and coaching gaps are trapped across call recordings, CRM notes, documents, and Slack threads.Show sales leaders where deals are advancing or stalling, while helping BDRs research territories and identify the right accounts to bring into pipelineLet reps practise against voice-based AI buyers grounded in real deals, objections, and battlecard contentYou won't just work inside this stack, you'll help decide where it goes.Frontend: ReactBackend: two services, a Node/TypeScript core and a Python agent serviceRetrieval: our own vector store written in Rust, SOTA late-interaction retrievalData: Postgres + MongoDBInfra: AWS (RDS, EC2, CloudFront, S3, ECR, ECS, ElastiCache, Lambda), MongoDB Atlas, Grafana + Prometheus, GitHub ActionsShip features end-to-end, from customer problem to design, deployment, and iteration - architecture decisions includedBuild reliable backend services and workflows behind the agentsBuild product surfaces across the web app and SlackWork on data models and infrastructure that handle very different data types, tuned for fast reads and writesOwn quality: testing, monitoring, observability, and incident responseCI/CD, deployments, and infrastructure hygieneCS degree, Bachelor's or Master's, or equivalent~4+ years shipping production software on a product team where you've owned something.xbhjioe Side projects are a bonus and can compensate for lack of experience~ Comfortable with TypeScript/React and Python/Node, or quick to pick them up~ Some hands-on time with CI/CD, deployments, and observability, and up for owning more here~ High agency and happy working on a small, cross-functional teamWhy you'll like it hereAlmost unlimited token budgetHay opciones de teletrabajo/trabajo desde casa disponibles para este puesto. ## Related Videos - [Agentic employees in world's most downloaded FinTech app](https://www.wearedevelopers.com/videos/100123-agentic-employees-in-world-s-most-downloaded-fintech-app) - [Integrate your Cognitive Assistant with 3rd-party DBs and software](https://www.wearedevelopers.com/videos/249-integrate-your-cognitive-assistant-with-3rd-party-dbs-and-software) - [Innovating Developer Tools with AI: Insights from GitHub Next](https://www.wearedevelopers.com/videos/1268-innovating-developer-tools-with-ai-insights-from-github-next) - [Stack Overflow: Community and AI](https://www.wearedevelopers.com/videos/600-stack-overflow-community-and-ai) - [Shipping Faster with Less: Render on Cloud Hosting, AI Workloads, and the Future of DevOps](https://www.wearedevelopers.com/videos/1894-shipping-faster-with-less-render-on-cloud-hosting-ai-workloads-and-the-future-of-devops) - [Bringing AI Model Testing and Prompt Management to Your Codebase with GitHub Models](https://www.wearedevelopers.com/videos/1536-bringing-ai-model-testing-and-prompt-management-to-your-codebase-with-github-models) ## Related Articles - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Dev Digest 131 - AI'm not sure about OSS](https://www.wearedevelopers.com/magazine/472-dev-digest-131-ai-m-not-sure-about-oss) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated)