27,055 Backend jobs
Server-side engineering roles — APIs, services, databases and backend systems.
Senior Python Backend Engineer - Lab Data Systems (Onsite)
A senior Python backend engineer role, placed via staffing firm Russell Tobin, working onsite in Cambridge, UK to maintain and expand data collection systems: integrating prototype hardware devices and improving the reliability and efficiency of audio, video, and sensor data collection and processing workflows in a hands-on lab environment.
Principal Backend Engineer, Enterpise Platform
Principal-level hands-on IC setting technical direction for Horizon3's Enterprise Platform powering NodeZero — licensing/entitlements, multi-tenant account administration, onboarding, notifications, and MSP/MSSP workflows. Backend work in Python/Go/Java/TypeScript with SQL, AWS, Docker/Kubernetes, plus mentorship of senior engineers.
Senior Backend Engineer (python/django) - Remote
Senior backend engineer building and maintaining scalable Python/Django services and REST APIs for a financial technology company's products. Day-to-day work covers API development, database design and query optimization, security, code reviews, and collaboration with frontend and product teams in a fully remote setting.
Remote Senior Backend Engineer (python/django)
Senior backend engineer designing, building, and maintaining scalable Python/Django services and REST APIs for a fast-growing SaaS company, working fully remotely with a global team. Stack includes PostgreSQL/MySQL, Celery, Docker, and cloud platforms (AWS/GCP/Azure).
Remote Senior Backend Engineer: Scalable Apis & Cloud
Senior backend engineer on a fully remote team: designs, builds, and maintains scalable server-side services and REST/GraphQL APIs, optimizes database performance, and contributes to architectural roadmaps using Python, Java, Go, or Node.js.
Senior Backend Developer Java | Producto Digital, Ia, Ci/Cd Y Observabilidad
Principal Statistical Programmer (remote) at Cytel, fully embedded with a global pharmaceutical client: builds SDTM/ADaM datasets, define.xml and SAS/R programs for clinical trial tables, listings and graphs, oversees CRO programmers, and supports regulatory submissions and clinical study reports.
Backend Java Developer – Microservicios | Tarjetas y Medios de Pago
Backend Java developer building and evolving microservices for digital payment solutions at a major financial institution — working on card tokenization, card digitalization, and linking devices to wallets. Core stack: Java 11+, Spring Boot, and Kafka/RabbitMQ messaging.
Remote Backend Java Developer - Microservices & Wallets
Backend Java developer joining the cards & payments area of a financial institution, building digital payment solutions such as tokenization, card digitization, and linking devices to wallets. Core stack: Java, Spring Boot, microservices architecture, and messaging with Kafka/RabbitMQ.
Backend Go Developer
A backend developer (2–3 yrs experience) at a Madrid-based IT consultancy in the Alkemy Group, building and maintaining Go microservices and REST APIs, working with SQL/NoSQL databases, writing tests, debugging production issues, and joining sprint planning within an Agile team with senior mentorship.
Backend Developer Node.js / Java (AWS)
On-site backend developer in Madrid maintaining and evolving Node.js services deployed on AWS for a leading transport-sector company, with a planned 2027 migration to Java. Day to day: hexagonal architecture, automated testing, CI/CD, GitHub PR reviews, Scrum, AI-assisted development, and on-call incident support.
Go Backend Developer — Flexible Hours & Growth Perks
Backend developer at GainRep in Madrid building and maintaining scalable Go backend services with mentorship from senior engineers — designing RESTful APIs, integrating with frontend profiles, and writing unit and integration tests using relational and NoSQL databases.
Backend Developer - Spring Boot (Java) in Córdoba
Backend developer in Córdoba, Spain, building and scaling a fintech platform: designing Java/Spring Boot microservices and REST APIs, working with SQL/NoSQL databases, and maintaining high standards of performance, security and reliability.
Backend Developer | Java / Python | Banking
Fully remote contract senior software engineer (~20 hrs/week) for Mercor: evaluates and enhances AI model capabilities on complex software-engineering tasks, builds benchmarks, and improves training data with AI research teams. Backend focus in Java/Python (banking per title), paying $150–$210/hour.
Desarrollador Java Senior | Líder Backend & Microservicios Spring
Senior Java developer at El Corte Inglés Group to lead backend development and define scalable enterprise solutions, coordinating multidisciplinary teams. Core stack is Java 11/17, Spring Boot, REST and microservices, with CI/CD; hybrid work based in Madrid.
Desarrollador Backend Java Spring Boot — APIs, Rendimiento
Backend Java developer at Kairos Digital Solutions in Huelva: design, build and maintain robust, scalable enterprise applications using Java and Spring Boot in an agile team alongside architects and product owners. Valued experience includes RESTful APIs, Hibernate, and relational database management.
Game Backend Developer
Designs, implements, and optimizes backend systems for turn-based games — architecture, APIs, microservices, and deployment — primarily in Golang with PHP for existing systems, MySQL/PostgreSQL, Redis/Memcached caching, and Docker/Kubernetes on Linux. On-site role at an Auckland game studio, requiring 5+ years of development experience.
Sr. Software Engineer, Backend
Senior backend engineer on Pendo's Core team, owning complex platform features end-to-end for the Pendo product analytics SaaS — coding in Go/Java/Python/C++ on AWS or GCP with SQL/NoSQL stores, shipping safely with feature flags and tests, and using AI tools daily. Hybrid role, 3 days a week in the Raleigh, NC office.
Backend Engineer
Build and scale backend services for a cybersecurity platform that secures AI-driven software development using .NET Core, Kafka, and Kubernetes.