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Build and maintain core banking backend systems in Java, ensuring regulatory compliance, performance, and security while shaping architecture decisions in a cloud-native AWS environment.
Designs and oversees the architecture of large-scale ticketing platforms for live events, using cloud technologies, event-driven systems, and modern web frameworks to power millions of transactions.
Designs and oversees the architecture of large-scale ticketing platforms for live events, using cloud technologies, event-driven systems, and modern web frameworks to ensure scalability and performance.
Full Stack Engineer at LEAP Dev in Sydney building the Productivity Reporting application, integrating and transforming large datasets into user-facing insights. Day to day: designing scalable web apps, developing ASP.NET Core/C# REST APIs and React front-ends, and working with SQL/NoSQL databases and AWS.
Senior Java Developer at EXANTE, a global wealth-tech/prime brokerage firm, designing and maintaining Java 17+ microservices for its backend trading ecosystem. Core stack includes REST/gRPC APIs, PostgreSQL, Kafka, Spring/Micronaut/Quarkus, and cloud platforms like Kubernetes, GCP, and EKS.
Senior Full Stack Engineer joining a Barcelona cybersecurity team that builds and scales a global vulnerability management platform processing millions of records daily. Day-to-day is end-to-end, backend-heavy work with Python/FastAPI, React, Kubernetes/Docker and AWS, plus MongoDB, Redis, RabbitMQ and GitLab CI, with growth toward Tech Lead.
Senior Full Stack Developer in G+D Mobile Security's R+D department (Sant Joan Despí, Spain), designing and building next-generation security products for international clients in Scrum teams. Day-to-day is end-to-end cloud development with Java (Spring Boot/Quarkus), Node.js, Angular, Kafka, AWS, Docker/Kubernetes and CI/CD.
Full stack engineer joining a cybersecurity Vulnerability team at a large European corporate group's Barcelona tech hub, building the platform that centralizes and processes global vulnerability data. Day-to-day: end-to-end feature development with React on the frontend and Python/FastAPI on the backend, automated testing, and progressive exposure to Docker, Kubernetes, and CI/CD.
Full stack engineer joining the Vulnerability team of a cybersecurity domain at a Barcelona tech hub of a large German group, building the core platform that centralizes and processes global vulnerability data. Day-to-day work spans React frontend and Python/FastAPI backend features, automated testing, and integrations with sources like Splunk, ServiceNow, and Salesforce.
Senior backend engineer who designs, builds and evolves the services behind TeamSystem's ERP Cloud: modeling business domains, developing APIs and tests, and deploying/operating services on Kubernetes in the cloud. Core stack is Node.js, TypeScript, NestJS, PostgreSQL and Redis, with React on the frontend when needed.
Senior backend Java developer at UST in Madrid, designing and evolving scalable, event-driven microservices and mission-critical distributed systems. Core stack: Java 17/21, Spring Boot, RxJava/Project Reactor, gRPC/Protobuf, Kafka, and AWS.
Mid/senior backend developer building and maintaining Java Spring Boot microservices and RESTful APIs, with additional Python work, for an energy-sector client. Day to day involves integrating relational (PostgreSQL, MySQL) and NoSQL (MongoDB, Redis) databases, writing tests, and collaborating with frontend, DevOps, and product teams. Position is 100% remote, based in Barcelona.
Java Backend Developer at international consulting firm Qaracter, building and maintaining backend applications and microservices for banking and financial projects. Day-to-day work centers on Java 8/11, Spring Boot/Batch/Cloud Stream, Kafka event-driven architecture, Oracle/PostgreSQL/Redis, and CI/CD with Jenkins and OpenShift.
Full Stack Engineer (Python/FastAPI + React) joining the Vulnerability team in the cybersecurity domain of a large German group's Barcelona tech hub, building the platform that centralizes and processes global vulnerability data (integrating Splunk, ServiceNow, Salesforce). Hybrid role: ~8 office days/month near Plaza Cataluña.
Senior Python Developer at Plexus Tech (Spain) building projects with Python and Django plus TypeScript, backed by PostgreSQL, Redis and RabbitMQ, and deployed with Docker and Kubernetes. Requires 5+ years of development experience and offers a permanent contract with 100% remote work.
Senior Python backend developer at DentalData, a SaaS platform helping dental clinics make data-driven decisions. Day to day: building automated ETLs on Google Cloud Platform, designing scalable cloud architectures, optimizing FastAPI backends (Redis, parallelism), and managing Kubernetes/Docker deployments.
Build and scale the backend of a photo-documentation app for contractors using Ruby on Rails, Postgres, GraphQL, and AI integrations, while mentoring engineers and improving system reliability.
Hands-on senior Linux engineer who owns the systems layer of tastytrade's production brokerage environment: Linux performance tuning, incident troubleshooting, config management (Salt/Ansible/Chef/Puppet), Kubernetes/Nomad, DNS/DHCP, Nginx/HAProxy, virtualization, Vault secrets, and observability with the Elastic Stack and Nagios/CheckMK/Icinga. Hybrid in Chicago.
Senior Linux infrastructure engineer who owns the production systems layer at tastytrade (Chicago, hybrid) — from bare metal to config management. Day to day: Linux performance tuning, incident troubleshooting, declarative config (Salt/Ansible/Chef/Puppet), Kubernetes/Nomad, networking/DNS/DHCP, Nginx/HAProxy, virtualization, Vault, and Elastic Stack observability.
Senior full-stack engineer at Scout Motors (electric trucks and rugged SUVs) building digital products on the Servicing & Repairs team — designing, developing, and operating scalable systems across front-end, back-end, and database layers while mentoring other engineers. Stack spans React/TypeScript-style front ends, back-end languages like Go/Python/Node.js, cloud databases, and AWS.
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