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Senior backend developer (Kotlin/Java, Spring Boot) building features and integration services for a mature, Europe-wide land-logistics platform of ~130 microservices. Work spans REST, SOAP, JMS, SFTP and Kafka integrations, performance/reliability tuning, testing, and Scrum/Kanban collaboration — 100% remote.
Senior backend developer designing and building scalable, API-driven microservices for an international client project, engaged via 1dea on a fully remote B2B basis. Core stack: Java 17+, Kotlin, Spring Boot/WebFlux, Vert.x, Hibernate, distributed systems integration, with AS4/B2B integration as a plus.
100% remote senior backend/data developer role contracted via 1dea (B2B) for a client project: designing backend solutions, data models, and query/performance optimization across MongoDB, PostgreSQL, Virtuoso Triple Store, and OpenSearch. Full-time, long-term, 130–155 PLN net/hour.
Senior backend developer who designs, builds, and maintains scalable .NET/C# services — RESTful APIs, event-driven systems with RabbitMQ, EF-based data modeling, Redis/NCache caching, and SQL Server — while mentoring juniors and collaborating with frontend, DevOps, and QA teams.
Senior Backend Engineer designing and maintaining scalable APIs and backend systems for AI-driven aviation inspection tools using Azure, collaborating with cross-functional teams in an Agile environment.
SPI Global Content Holding is hiring a Senior Java Backend Engineer in Singapore to design, build, and optimize data-processing and analytics systems, implementing parallel processing frameworks and memory-efficient handling of large datasets. Core technologies: Java, SQL, and cloud platforms.
Senior backend engineer in Singapore who owns backend systems end-to-end, from greenfield build to production. Day to day involves designing APIs in Node.js/TypeScript with PostgreSQL, with emphasis on data security and scalable cloud-first operations.
A senior engineer in Singapore West (hybrid) designs and builds full-stack applications, focusing on backend services with Java, Kotlin and Spring Boot, RESTful/GraphQL APIs and microservices, deployed as cloud-native solutions on AWS (ECS, Kubernetes, Lambda), with some frontend work in Svelte, React or Vue.
Senior Go backend engineer on Workato's Platform team in Singapore, designing, building, and maintaining Go microservices across the full development lifecycle, including implementing APIs, caching, and messaging in collaboration with Infra and SRE.
Senior backend developer maintaining, evolving and optimizing Node-RED flows and a Node.js/TypeScript backend that processes large volumes of healthcare data, based in Valencia (hybrid: 3 office days, 2 remote). Work centers on REST APIs, resilient system integrations, PostgreSQL/Elasticsearch optimization and Docker deployments.
Senior backend developer building Java microservices for an insurance-sector project, working mainly with Spring Boot, Kafka, and MongoDB in an event-driven architecture. Hybrid role based in Barcelona (1 office day per week), covering architecture decisions, technical design, and Agile development.
Tecdata is hiring a senior Java backend developer for a hybrid role in Madrid. Day to day, the person designs and builds backend services using Java with Spring and Oracle, at a salary of €38,000 per year.
Placements24's client seeks a Senior Backend Engineer to design, build, and scale the server-side logic, databases, and APIs behind their core products, initially remote with potential hybrid work in Rustenburg. Expect work with Python/Java/Go/Node.js, PostgreSQL or MongoDB, AWS/Azure, and Docker.
Senior Backend Developer at Getecsa, a Mexican human-capital management and technology services firm, working with a key client in a hybrid role at Santa Fe, Mexico City. Day-to-day backend development using Java Spring Boot or Node.js with TypeScript, microservices, and relational/NoSQL databases.
Senior backend developer, placed via Getecsa's staff augmentation with one of its main clients, building scalable, fault-tolerant microservices and REST/GraphQL APIs using Java Spring Boot and/or Node.js + TypeScript. Works with relational (PostgreSQL/MySQL/Oracle) and NoSQL (MongoDB/Redis/DynamoDB) databases, hybrid on-site in Santa Fe, CDMX.
ADDIUVA is hiring a senior developer in Mexico City to design, build, and optimize scalable solutions centered on APIs, microservices, and architecture evolution in an agile environment. Day-to-day work emphasizes strong development fundamentals, Git, and SQL/NoSQL databases, with focus on UX, performance, and security.
Design, develop, test, and maintain scalable backend services powering F5's AI Security web application, collaborating with cross-functional teams. The core stack is Python with FastAPI, PostgreSQL/MySQL databases, and RESTful multi-service architectures.
A senior backend engineer at XE (recruited via Crescent Consulting) who builds and modernises backend services for cross-border payments and FX, owning services in production with a focus on reliability and scalable architecture. The role is hybrid in Auckland or Christchurch, NZ, with global collaboration, mentoring, and AI-assisted development practices.
Senior backend engineer at a business process outsourcing firm in the Philippines who designs, builds, and maintains scalable software services and APIs, participates in architecture decisions, and mentors junior engineers. Core requirements span 5-8+ years of development experience with languages like Java, C#, Python, JavaScript/TypeScript, or Go, plus databases, Git, and automated testing.
Senior backend developer role focused on building Python APIs with FastAPI and LangGraph: integrating services through a central orchestrator, generating/exporting documents, and adding trust-and-safety features like content filtering, human-in-the-loop review, and prompt-injection defenses. Includes data-pipeline work for source-grounding/citation flows. Based in India.
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