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Work with Integration Architect and Solution Architects to write the Integration for the various requirements. Analyse the current integration and plan for refactoring the same to conform to Enterprise Integration…
DotGolf is hiring multiple Senior Backend Integration Developers for a 9-12 month fixed-term mobile app project in Albany, Auckland. The role focuses on building secure, scalable APIs and data integrations with existing live systems, primarily using C#/.NET, SQL Server, and AWS.
Senior backend engineer joining a Christchurch technology team to design, build, and own business-critical services and APIs end to end. Day-to-day work spans C#/.NET services, SQL data solutions, event-driven architecture, and AWS (SQS, DynamoDB, S3, ECS, Lambda), plus mentoring engineers and using AI-assisted development tools.
Senior backend engineer at XE building and modernising services behind a global cross-border payments and FX platform, working hands-on with C#/.NET, SQL, and AWS. Hybrid role in Christchurch or Auckland with ownership of APIs, integrations, reliability, and mentoring.
Signaturit Group, a European digital transactions platform (e-signature, KYC, legal archiving), is hiring a Senior Backend Developer in Valencia to design and implement modular .NET backend services, write automated tests, take part in architectural decisions, code reviews, and production support.
Placements24 is hiring a fully remote Senior Backend Java Engineer to design, develop, and maintain scalable backend systems and robust architectures. Day to day involves building RESTful APIs, optimizing performance, and ensuring code quality through thorough testing while collaborating with frontend and product stakeholders.
Contract Senior Backend Engineer on a major UK financial services project, designing scalable backend services, REST APIs, microservices and secure integrations using Java, Python and/or Node.js, Kafka, GCP, Kubernetes/OpenShift and OAuth/SAML. Hybrid with 2 days on site across Leeds, Manchester or Edinburgh, running to 20 Dec 2026 with possible extension.
Senior backend engineer joining TransPerfect's TechOps team in London to build scalable backend systems and secure, efficient APIs in C#/.NET. Day to day involves coding, debugging, cross-functional collaboration, and mentoring junior engineers within a global team.
Senior backend engineer designing, building and evolving Node.js/TypeScript applications that power Care ADHD's patient-care platform. Works with product, design and QA teams across the UK and India, contributing to architecture decisions from a hybrid Canary Wharf, London office.
Theia Insights is hiring a mid-to-senior backend engineer in the UK to build scalable async REST APIs with FastAPI and Python, manage large data pipelines using Pandas, Parquet/Arrow, and DuckDB, and own identity and access management via AWS IAM and OAuth2/OIDC. The role runs services on AWS and occasionally touches front-end work in TypeScript/React.
Origin8tive Ltd is hiring a senior backend engineer in Cheltenham to design, build, and maintain backend systems in Java and C++ on Linux, while providing technical leadership, mentoring, and input on architecture. Applicants must hold or be eligible for UK security clearance; salary up to £78,000.
Senior backend/platform engineer building scalable REST data APIs (FastAPI) and large-dataset access layers (Pandas, Parquet/Arrow, DuckDB) for institutional investor products. Owns the identity layer (OAuth2, JWT, API keys) in a multi-tenant SaaS on AWS, plus data services and occasional frontend work.
Senior backend engineer joining Kadaster's Ozon team to build Java/Spring Boot backends (with some Angular frontend) for a central Dutch DSO service that validates and registers environmental documents via APIs. Works in a 10-person Agile Scrum team on clean code, code reviews and DevOps.
Senior backend engineer at Het Kadaster (the Dutch land registry) building Java/Spring Boot backends for the Ozon team within the DSO ecosystem. Day to day: designing and implementing Java services alongside an Angular frontend on Kubernetes, delivering quality software via SAFe/Agile with DevOps and CI/CD.
Senior Java backend developer building and maintaining the NDW Backbone, the real-time road traffic data platform for the Dutch national data portal. Day to day: Java back-end development, Kubernetes deployments, and SAFe Scrum collaboration with a product owner, scrum master, tech lead, and fellow Java engineers.
Senior Backend Engineer to develop and maintain Overheid.nl for Logius (Dutch government), working on personalization, geo-search and a high-availability portal. Core stack is PHP/Drupal with DevOps tooling like Docker, Kubernetes and CI/CD, collaborating with front-end and UX designers.
Crowe Nederland is hiring a Senior Backend Engineer to build and maintain the Python (FastAPI, PostgreSQL) backend of its CynthAI platform, delivering APIs and data models and shaping architecture, security, and scalability so AI features run reliably in production, in collaboration with data, dev, and AI teams in a hybrid setup.
Senior backend developer building and optimizing a global football data platform (matches, teams, players) using C#/.NET, REST APIs, SQL Server and Umbraco, including caching and scalability work, on an Amsterdam-based scale-up team.
Freelance (zzp) senior backend engineer joining Het Kadaster's Ozon team, building and operating ~10 Java/Spring Boot services that validate, register and serve Omgevingswet spatial-planning documents via APIs. Stack includes Kotlin, Angular, PostgreSQL/PostGIS, RabbitMQ, Docker/Kubernetes on Azure, working Agile/Scrum with full DevOps ownership.
Senior .NET back-end developer joining a five-person senior team to build new features and back-end services for existing software, with a focus on performance and architecture. Core stack is .NET, C#, ASP.NET and SQL Server, with Azure experience as a plus.
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