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Backend Developer joining the internal tech team of a Rome-based MarTech company, designing and building scalable backend services, APIs, and microservices for proprietary digital platforms, including AI-powered features. Core stack is PHP with Laravel/Symfony, Docker, and Git.
Builds backend services and Agentic AI applications in Singapore — developing APIs, integrating AI/LLM components, and creating data pipelines with databases and knowledge graphs to deliver scalable, production-ready solutions. This is an outsourcing role delivered in partnership with e2i.
Research Assistant (Backend & Platform Engineer) at the National University of Singapore's School of Computing, building backend and platform infrastructure for an AI-powered research platform. Day-to-day work centers on developing novel computational solutions and large-scale experimental systems in support of research.
Backend Engineer in Singapore who designs, builds, deploys, and operates secure backend services powering AI/ML and generative AI solutions (model pipelines, RAG, APIs, prompt workflows). Day-to-day mixes Python backend development, cloud (AWS) deployment, MLOps/LLMOps monitoring, and responsible-AI/security compliance work with DevOps, data, and platform teams.
Backend Java developer at IT services firm UST, fully remote in Spain, modernizing legacy enterprise applications using AI coding tools like GitHub Copilot and Devin AI. Day to day involves Java/J2EE development, Oracle/PL-SQL work, and improving code quality with SonarQube and Fortify in CI/CD pipelines.
Senior backend Java developer for a stable end-client company (empresa final) in Barcelona, hybrid with ~2 remote days/week. Work on tech migration, an environmental-area module renewal, and new business features. Needs 5+ years of Java and relational DB experience; Angular knowledge is a plus. €40k–45k gross/year, 37.5h week.
Senior Java backend developer joining a brand-new global platform that optimizes logistics and distribution processes. Day to day: building Java 21/Spring Boot microservices (Kafka, PostgreSQL, MongoDB, gRPC/OpenAPI), shaping architecture (DDD, hexagonal), and owning CI/CD with Jenkins plus production observability tooling.
Senior .NET backend developer at Sword Iberia designing and building modern REST/Minimal APIs with Clean Architecture on Azure. Daily work spans C#/.NET 8+, CQRS/MediatR, Dapper with SQL Server/Oracle, OAuth2/OIDC/Keycloak auth, TDD, Git and CI/CD. Offers 100% remote work, permanent contract and flexible hours.
Freelance (autónomo) Python backend developer for a 4–6 month, 100% on-site project in Madrid starting ASAP. Day to day: develop, maintain and optimize backend applications and services in Python, ensuring scalability, quality and integration while collaborating with agile, multidisciplinary teams. JavaScript knowledge is a plus.
Senior Java backend developer designing and evolving microservice-based backend solutions for a client's digital products, applying hexagonal architecture, DDD, event-driven messaging (Kafka/RabbitMQ) and API-first design with strong automated testing. 100% remote (Spain) with occasional on-site meetings in Madrid.
Remote (Brazil) backend role at CI&T building and maintaining a Python/FastAPI REST API that exposes data processed by a Databricks team for a financial-market project. Day to day: endpoint development, security/performance, unit testing, code reviews and agile collaboration; office attendance in Campinas applies if you live in that metro area.
Senior Backend Engineer to design, build, and operate the backend services, APIs, data pipelines, and event-driven systems powering Avive's connected AED cardiac-arrest response platform, using Python, Django, PostgreSQL, Redis, Celery, and Elasticsearch. Remote role for candidates residing in the US or Canada.
A senior backend developer in Karachi who designs and owns Java-based microservices and core RESTful APIs, integrates with frontend teams, and optimizes performance of large-scale systems using Java, Spring Boot, and SOLID principles in an agile environment.
Senior backend developer at VALTX who designs, develops and deploys Java (21+) and Quarkus microservices, implements enterprise integration patterns with Apache Camel, ensures code quality through unit/integration/performance testing, and mentors junior developers. Hybrid role based in Miraflores, Peru.
Backend Java tech lead for a banking client in Peru: advising an innovation center, enforcing clean-code practices (SOLID, design patterns), and driving development and maintenance of highly available banking services and APIs/microservices. Core stack is Java 17+, Spring Boot, reactive programming, Azure cloud services, with blockchain/Web3 integration exposure.
Staff Backend Software Engineer at DAT, a logistics SaaS company, designing and scaling high-performance backend systems using Node.js, AWS, and Kafka to power a freight marketplace.
Lead backend software engineer on JPMorganChase's Commercial & Investment Bank Digital Post Trade Technology group, designing, building, and troubleshooting secure, scalable post-trade services in an agile team. Core stack is Java with Spring Boot and Kafka, plus NoSQL stores and optionally AWS.
Group 107 is hiring a hands-on engineering team lead in New York to guide a team on a client project with Capitolis: roughly 60% hands-on backend coding plus architecture stewardship, mentoring developers, and driving delivery of scalable microservices and data systems.
Lead engineer at Nationwide Property & Appraisal Services doing hands-on Django backend development, owning features end-to-end, reviewing architecture, and overseeing other engineers — including contractors and AI-assisted work — in a regulated, compliance-focused domain. Remote within the United States, with a deliberate pace focused on quality and documentation.
Lead software engineer on JPMorgan Chase's Consumer & Community Banking technology team in New York, serving as a core technical contributor building trusted, scalable backend products in a secure environment. The role drives AI-assisted development practices, oversees complex architectures, and coordinates across vendor and internal teams.
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