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Backend developer building and scaling critical APIs and external partner integrations in a microservices fintech ecosystem. Day-to-day work uses Node.js, TypeScript, NestJS, RabbitMQ, PostgreSQL and AWS, with Claude as an integrated AI dev tool, in a hybrid model from Madrid.
Backend developer hired through IT consultancy Capitole to build and operate end-to-end IoT/M2M cloud solutions for a leading security-sector client, working remotely (Madrid-based). Core stack: AWS (EKS, IoT Core, MSK), Terraform, Kubernetes, Docker, CI/CD, Python, and monitoring with ELK and Prometheus/Grafana.
Backend developer at MCA, an international engineering and technology consulting firm with 1,450 people across Europe. You design and build business logic, REST APIs and microservices in Java (Spring/Spring Boot) and/or PHP, integrate SQL/NoSQL databases and optimize performance, working hybrid from Madrid or Barcelona.
Backend/Data engineer on Coralogix's Core Data Pipeline team, building and scaling the engine that processes billions of real-time telemetry events (logs, metrics, traces) per second. The stack centers on Scala/Rust/Node.js, Kafka and stream processing, ClickHouse, Redis, Kubernetes, and AWS.
Fully remote backend developer role at Sngular (Spain): design highly scalable Go microservices, work with SQL databases, Kafka event streaming, database optimization (sharding/bulking), and integrate AI into data flows. Requires 8+ years backend experience and advanced daily-use English.
Senior Backend Engineer (fully remote within Canada: GTA, Ottawa, Montreal) designing and building scalable backend services, microservices, and real-time data pipelines for data-intensive applications. Core stack: TypeScript and Python, with time-series databases and cloud-native tooling.
Senior Backend Engineer at a construction technology company in Toronto (remote with optional downtown office). Day to day: design backend architecture, build tested Python/Flask REST APIs, work with relational databases and event-based processing (RabbitMQ/Celery), and collaborate across engineering teams.
Worthland Consulting, a Web3-focused recruitment agency, is sourcing a Senior Backend Engineer to build scalable backend systems for a blockchain infrastructure team — RPC services, bot automation, off-chain SDKs, and on-chain/smart-contract interactions. Core stack is Go and TypeScript, with DeFi and decentralized protocol experience. Fully onsite in downtown Toronto, 5 days per week.
Designs, architects, and optimizes scalable cloud-native microservices powering Parts Town's eCommerce and enterprise platforms (commerce, CMS, ERP, PIM, marketing), owning backend standards, CI/CD, testing, observability, and disaster recovery. Core stack: Node.js, TypeScript, Docker, Kubernetes, serverless, PostgreSQL/MongoDB/Redis, and event-driven tooling like Kafka.
Earnix is hiring a Backend Engineer in Paris to design, build, and document secure, scalable microservices and APIs for its pricing and underwriting platform, integrating LLM and agentic AI capabilities. Day-to-day work centers on TypeScript/Python backend development, cloud-native deployment on Azure/AWS, and containerized infrastructure with Docker, Kubernetes, and ArgoCD.
Contract Senior Backend Software Engineer (Java) joining a major automotive client's Identity Management Services team in Dunton, Basildon (4 days/week on-site). As technical lead, they design and build high-scale, secure Java/Spring identity services, own platform security and resilience, and mentor the team using Agile and DevOps practices.
Methods is hiring a backend developer on a UK digital delivery team to design, build and maintain secure, scalable backend services and APIs for government-focused digital services. Core stack is TypeScript with serverless architecture on AWS (Lambda, API Gateway), alongside automated testing and modern engineering practices.
Hims & Hers is the leading health and wellness platform, on a mission to help the world feel great through the power of better health. We are redefining healthcare by putting the customer first and delivering…
Senior Backend Engineer at Faye (a US travel protection/insurtech company) will design, build, and own scalable backend services end-to-end for its travel insurance and traveler-care platform. Core stack: Node.js, Nest.js, TypeScript, PostgreSQL, and AWS.
Senior Backend Developer/Tech Lead at DriveNets will design, build, and own production systems for cloud-native networking software, working with multiple teams. Core technologies include NodeJs, Python, or Go, with experience in distributed systems and databases.
Senior backend engineer who owns the full backend lifecycle at an AI-first product company: designing scalable Python/FastAPI services and REST APIs, integrating LLM/AI services with PostgreSQL, Redis and vector databases, deploying with Docker/AWS, and mentoring junior developers. Full-time on-site in Gurugram.
Backend Developer at Mize, a travel-tech company building AI-driven revenue infrastructure for travel brands. Day to day involves Java backend development with SQL/MySQL databases, data manipulation, and Linux work, in a hybrid role based in Madrid.
Backend engineer at Wise in Budapest building and owning real-time risk and fraud infrastructure for Instant ACH in the US market, working with Java/Kotlin on Spring, Kafka/Streams or Flink event processing, and database tuning; collaboration with data scientists and occasional US travel, with ML exposure as a plus.
Designs and implements complex Java backend services for the company's own management software serving local public administration and healthcare clients in Bologna. Core stack: Java 8+, Spring Boot microservices, Tomcat, Log4J, Jasper reports, and Oracle databases.
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