Backend Engineer

• Design, develop, and evolve robust, high-performance, and maintainable Python backend services
• Develop APIs and application components using Python, FastAPI, and Pydantic
• Implement service-based and event-driven architectures, particularly with RabbitMQ
• Develop asynchronous and high-performance processes with AsyncIO
• Design and optimize integrations with SQL Server and PostgreSQL
• Implement code quality best practices, automated testing, and CI/CD
• Collaborate with DevOps, Data Engineering, Architecture, and Development teams
• Participate in refactoring and continuous improvement initiatives
• Ensure the operational stability of applications and services
• Analyze and resolve complex technical incidents and issues
• Diagnose malfunctions and identify their root causes
• Track service requests and support users and stakeholders
• Contribute to the reliability, security, performance, and scalability of applications
• Improve monitoring, logging, and alerting
• Participate in code reviews and share best practices
• Support and challenge less experienced developers

Senior Python Developer

• Own end-to-end data extraction workflows across complex websites, ensuring complete coverage, accuracy, and reliable delivery of structured datasets
• Leverage available tools and custom workflows to accelerate data collection, validation, and task execution while meeting defined requirements
• Ensure reliable extraction from dynamic and interactive web sources, adapting approaches for JavaScript-rendered content and changing site behavior
• Enforce data quality standards through validation checks, cross-source consistency controls, formatting specifications, and systematic verification prior to delivery
• Scale scraping operations for large datasets using efficient batching or parallelization, monitor failures, and maintain stability against minor site structure changes
• Apply expertise in web scraping, data extraction, and data processing for the Tendem project
• Utilize tools such as Apify, OpenRouter, and other technologies alongside technical expertise and custom approaches

Senior Python Data Scraping Engineer

• Build high-performance backend services and APIs for enterprise-grade SaaS applications
• Develop scalable, secure Node.js microservices and integrations within the Salesforce ecosystem
• Create modern front-end experiences using Vue.js and TypeScript
• Build CI/CD pipeline tooling, automation frameworks, and developer productivity infrastructure
• Implement real-time data processing and event-driven architectures for sensitive enterprise data at scale
• Work directly with engineering leadership, product managers, and the CEO
• Own significant parts of the architecture and ship production code used by enterprise customers
• Own systems end-to-end and contribute during the company's growth phase

Senior Node.js Developer

• Handle end-to-end data extraction workflows across complex websites
• Ensure complete coverage, accuracy, and reliable delivery of structured datasets
• Use tools and custom workflows to accelerate data collection, validation, and task execution
• Extract data from dynamic and interactive web sources, adapting to JavaScript-rendered content and changing site behavior
• Enforce data quality through validation checks, cross-source consistency controls, formatting specifications, and systematic verification
• Scale scraping operations for large datasets using efficient batching or parallelization
• Monitor failures and maintain stability against minor site structure changes
• Apply Python web scraping, data extraction, processing, automation, and LLM tools within the Tendem project
• Work independently to solve non-trivial problems and troubleshoot technical issues

Senior Python Data Scraping Engineer – Freelance

• Participate in the development, enhancement, and maintenance of core business applications
• Design and develop backend applications and services in C# / .NET, particularly .NET 8 and later versions
• Develop and enhance REST APIs / Web APIs
• Develop and maintain WCF, WCF REST, and Web Services
• Work on ASP.NET MVC / WebForms applications and .NET Framework environments
• Design robust, maintainable, and high-performance solutions based on SOLID principles, object-oriented programming, and design patterns
• Develop and work with data using Entity Framework Core
• Work with SQL Server and Oracle databases
• Develop and integrate XML and JSON data flows
• Participate in code reviews and implement unit tests
• Collaborate with analysts and architects to translate requirements into appropriate solutions
• Understand and interpret UML and BPMN models
• Provide corrective and evolutionary maintenance for existing applications
• Diagnose and resolve technical incidents
• Identify and resolve application and database performance issues
• Optimize queries and data access using Entity Framework Core / SQL
• Contribute to monitoring and improving code quality
• Document solutions and share best practices
• Contribute to development and delivery through Azure DevOps and Git

.NET Developer

• Develop and maintain applications according to specifications and technical best practices
• Analyze requirements
• Investigate technical solutions meeting requirements and standards
• Assist the project manager with task definitions, estimates, and deliverables
• Define and integrate technological components or applications
• Assist with system deployment and configuration
• Provide application support and investigate issues, including 3rd-level support
• Develop and maintain Java-based applications
• Support integration with existing platforms
• Assist with system enhancements and optimizations
• Participate in testing, debugging, and validation activities
• Cooperate with a major client’s IT team on site

Junior Java Developer

• Join an Agile team and contribute to delivering a product at the end of each sprint
• Analyze and design the elements required to build the product
• Develop Java features
• Participate in integrating the various components and technologies
• Design and develop solutions based on Spring Boot, microservices, Docker, and Kubernetes
• Contribute to development in Cloud environments
• Help deliver the sprint backlog according to the Product Owner’s priorities
• Participate in testing the developed features
• Contribute to integrating and delivering product components at each sprint
• Collaborate with the team to resolve issues encountered
• Share knowledge and contribute to continuous improvement
• Comply with development methods, standards, security procedures, and tools

Java Developer

• Join a product team responsible for Portals & Platforms solutions
• Design, develop, and enhance business-critical applications
• Design and develop new features using .NET 8 / C# and Blazor WebAssembly
• Develop robust and maintainable application components and services
• Implement the data access layer using Entity Framework Core
• Design and operate SQL Server and MongoDB databases
• Implement asynchronous communication and event-driven architectures with RabbitMQ
• Contribute to the design and evolution of microservices-based solutions
• Write and maintain automated tests following a TDD approach
• Ensure code quality, performance, and maintainability
• Provide corrective and evolutionary maintenance for existing applications
• Analyze and resolve incidents and technical issues
• Ensure the quality and stability of delivered developments
• Identify technical improvements that enhance reliability and maintainability
• Collaborate with product and technical teams to ensure service continuity and evolution

Senior .NET Developer

• Guide enterprise customers through the design, validation, and deployment of VMware Kubernetes Service (vKS) solutions on VMware Cloud Foundation (VCF)
• Collaborate with field account teams to align solution architecture with customer priorities
• Lead technical discovery sessions, workshops, and proof-of-concepts
• Partner with sales to develop customer proposals addressing modernization goals, workload placement, and operational transformation
• Provide guidance on Kubernetes adoption, CI-CD integration, scalability, security, and disaster recovery
• Build and share reference architectures, deployment patterns, and technical assets
• Deliver technical presentations to architects and executive decision makers
• Monitor industry trends, competitor offerings, and evolving enterprise requirements
• Collaborate with product management and engineering to provide field feedback influencing the roadmap

Kubernetes Platform Architect

• Develop and maintain Java backend applications
• Design and integrate REST APIs and backend services
• Work with Kafka and Flink for distributed data processing
• Participate in technical design, code reviews and automated testing
• Collaborate with Agile/Scrum teams to deliver reliable solutions
• Support production issues and continuous improvement
• Provide technical leadership in complex enterprise environments
• Apply CI/CD practices and resolve technical issues in production applications

Backend Engineer jobs in Belgium