🏢 Summary: Senior Backend Engineer role focused on designing and scaling a high-throughput, event-driven platform. The position centers on building and optimizing large-scale event processing services and APIs in distributed systems. It involves solving complex scalability and reliability challenges in a massive-scale environment. 🗂️ Requirements: Senior-level experience in backend development, Strong Python expertise, Experience scaling message queue systems, Experience with distributed systems and microservices architecture, Proven track record building high-throughput backend services, Experience designing scalable and fault-tolerant systems, Ability to implement and optimize APIs 📃 Skills: Python, Azure, ServiceBus, StorageQueues, EventHubs, Microservices, DistributedSystems, APIs, EventDriven, EventSourcing, Streaming, Observability, Monitoring 🏢 Description: Location: Remote Type: Full-time Level: Senior Duration: 4 months Start: ASAP We are looking for an experienced Senior Backend Engineer to join a team responsible for building and scaling a high-throughput, event-driven platform operating at massive scale. Your primary focus will be the event processing backbone — designing, developing, and optimizing services that handle large volumes of messages reliably and efficiently. You will work closely with architects and other senior engineers to implement APIs that expose data and support advanced triage and processing workflows. This role is ideal for someone who enjoys solving hard scalability problems , working with distributed systems, and building resilient backend services that operate under real-world load. Responsibilities Design and build backend services responsible for large-scale event processing Optimize and scale message-based systems to handle high throughput and reliability requirements Implement APIs defined by system architects to expose data and collect processing results Collaborate with cross-functional teams to improve platform performance and resilience Contribute to architectural decisions around scalability, fault tolerance, and observability Core Skills Strong experience with Python as a primary backend language Deep expertise in scaling message queue systems (e.g. Azure Service Bus, Storage Queues, Event Hubs or similar) Solid understanding of microservices architecture and distributed systems Proven experience building high-throughput, resilient backend services Strong problem-solving skills and ability to work with complex systems Highly Desirable Experience with event-driven or event sourcing architectures Background in data processing frameworks or streaming systems Experience building platforms related to observability, monitoring, or large-scale event management Familiarity with designing systems for fault tolerance and graceful degradation What we offer Work on technically challenging systems operating at very large scale High level of autonomy and real influence on system architecture Collaboration with experienced engineers in a mature engineering environment Competitive compensation and flexible working model Project with strong technical ownership

🏢 Summary: Senior Back-End Developer role focused on building and maintaining scalable backend services using Node.js and AWS. The position involves designing complex GraphQL APIs, implementing serverless architectures, and optimizing performance and security. You will also contribute to CI/CD automation and technical best practices. 🗂️ Requirements: 5–7 years of Back-End development experience, Strong proficiency in JavaScript, Strong proficiency in Node.js, Solid experience with AWS, 3–4 years of experience with GraphQL, Experience with GitLab, Experience managing CI/CD pipelines, Operational/technical level of English 📃 Skills: JavaScript, Node.js, AWS, GraphQL, GitLab, CI/CD, Lambda, Serverless 🏢 Description: Nous recherchons un Développeur Senior Back-End avec une expertise en Node.js et AWS. Le candidat idéal aura une solide expérience en développement d APIs, en architecture serverless et en optimisation de performance. Vous participerez à la conception et à la mise en oeuvre de solutions innovantes tout en assurant la qualité et la sécurité des applications. Vos missions: Concevoir, développer et maintenir des services backend en Node.js / JavaScript. Participer à la mise en oeuvre et à l'évolution des architectures BFF et des agrégateurs d'APIs. Concevoir et maintenir des APIs GraphQL complexes. Gérer les problématiques de performance, de sécurité et de complexité GraphQL. Développer et déployer des composants serverless sur AWS Lambda. Participer à l'automatisation des déploiements et à l'amélioration continue des processus CI/CD. Intervenir sur les pipelines GitLab CI/CD et les processus de livraison. Contribuer aux choix techniques et aux bonnes pratiques de développement. Votre profil: 5 à 7 ans d'expérience en développement Back-End. Excellente maîtrise de JavaScript / Node.js. Solide expérience sur AWS. Très bonne maîtrise de GraphQL avec au moins 3 à 4 ans d'expérience. Expérience des outils GitLab et de la gestion des pipelines CI/CD. Niveau d’anglais opérationnel / technique.

🏢 Summary: Senior Backend Engineer role focused on building and scaling a cloud-based SaaS platform using modern .NET services and REST APIs. The position involves designing distributed systems, improving reliability and observability, and working with cloud and container environments. You will contribute to technical decisions and engineering best practices within a collaborative team. 🗂️ Requirements: 5+ years backend development experience, Experience with SaaS and web applications, Strong knowledge of C#, Strong knowledge of modern .NET/.NET Core, Solid computer science fundamentals, Experience with distributed systems design, Experience with cloud platforms, Experience with containers and orchestration, Understanding of concurrency and performance, Knowledge of authentication and authorization mechanisms 📃 Skills: C#, .NET, .NETCore, REST, Azure, AWS, GCP, Kubernetes, Kafka, RabbitMQ, SQS, Docker, SQL, HTML, CSS, JavaScript 🏢 Description: We’re hiring a Senior Backend Engineer to help build and scale a cloud-based SaaS platform. You’ll work on modern .NET services and APIs, improve reliability and observability, and contribute to technical decisions as part of a collaborative engineering team. Responsibilities: Build and maintain backend services and REST APIs in C# / .NET (.NET Core). Design scalable solutions for distributed systems (async workflows, messaging, integrations). Work with cloud services (Azure/AWS/GCP) and container environments (e.g. Kubernetes). Strengthen system reliability with logging, metrics, tracing, and monitoring. Support secure access patterns: authentication/authorization, API gateway concepts. Contribute through code reviews, good engineering practices, and automation. Requirements: 5+ years of backend development experience, including SaaS and web applications. Strong knowledge of C# and modern .NET + solid CS fundamentals. Familiarity with containers/orchestration and cloud-native approaches. Experience with some of: Kafka/RabbitMQ/SQS, workflow orchestration, job scheduling, search. Good understanding of concurrency and performance. Strong communication skills; Agile/Scrum is a plus. Bonus: basic front-end knowledge (HTML/CSS/JS).

🏢 Summary: Senior Backend Engineer role focused on designing and delivering scalable, production-ready software using Node.js and AWS. The position involves leading development of complex solutions, ensuring high performance, reliability, and security, and integrating monitoring and testing practices. The engineer collaborates in agile teams to translate product requirements into resilient cloud-based applications. 🗂️ Requirements: Strong experience with Node.js and TypeScript, Proficiency with AWS services (Lambda, SNS/SQS, API Gateway, CDK), Experience with TDD and QA best practices, Ability to design and build highly scalable applications, Experience with monitoring, performance, scalability, and security, Experience conducting code reviews and delivering production-ready code, Ability to integrate monitoring and support tools, Experience contributing to test frameworks 📃 Skills: Node.js, TypeScript, AWS, Lambda, SNS, SQS, API Gateway, CDK, TDD, QA, Monitoring, Scalability, Security, Agile 🏢 Description: We are looking for a Senior Backend Engineer (Node.js / AWS) who: Has strong experience with TDD and solid understanding of QA best practices. Can handle operational challenges : monitoring, performance, scalability, availability, resilience, and security. Translates product requirements into reliable, scalable software . Has excellent development skills and experience building highly scalable applications . Is proficient in Node.js, TypeScript , and AWS services like Lambda, SNS/SQS, API Gateway , and CDK . What you’ll do: Lead development of complex software solutions. Conduct code reviews and deliver production-ready code . Integrate software with monitoring/support tools . Collaborate with architects and technical leads, participate in agile processes . Contribute to test frameworks , troubleshoot issues, and ensure smooth team collaboration.

🏢 Summary: Senior Backend Engineer role focused on designing and developing scalable, reliable backend services using Java. The position involves working in a cross-functional team to build high-performance systems, improve architecture, and support CI/CD and production environments. 🗂️ Requirements: 5+ years Backend Engineering experience, Strong Java proficiency, Solid knowledge of databases and SQL, Experience with RESTful APIs, Experience with microservices architecture, Experience with high-load systems, Experience with Docker and Kubernetes, Experience with AWS or GCP, Knowledge of CI/CD pipelines, Understanding of Agile practices 📃 Skills: Java, SQL, REST, Microservices, Docker, Kubernetes, AWS, GCP, CI/CD, Golang, Python 🏢 Description: We are looking for a Senior Backend Engineer with strong Java experience to help us design and develop scalable solutions. You will work in a cross-functional team, building reliable services and contributing to the continuous improvement of our systems. This role is ideal for someone who enjoys solving complex problems and driving technical excellence. 💼 Responsibilities: Design, develop, and maintain backend features and services. Collaborate with teams to define requirements and integrate systems. Ensure performance, scalability, and reliability of applications. Contribute to CI/CD processes and support production systems. Write clear documentation and share knowledge within the team. ✅ Requirements: 5+ years of experience as a Backend Engineer, with strong Java skills (Golang/Python is a plus). Solid understanding of databases and SQL. Experience with RESTful API design, microservices, and high-load systems. Familiarity with Docker, Kubernetes, and cloud environments (AWS/GCP). Knowledge of CI/CD pipelines and Agile practices. Strong problem-solving and communication skills. 🎁 We offer: Stable employment in a fast-growing company. Flexible and remote-friendly working model. Health and wellbeing benefits. Learning and development opportunities. Modern equipment and comfortable work environment.

🏢 Summary: Senior Backend Engineer role focused on building and maintaining scalable backend systems using NodeJs, Python, MongoDB, MQTT, and AWS. The position involves full lifecycle development, API and system design, code quality improvements, mentoring junior engineers, and contributing to technical strategy. Candidates should have strong backend engineering experience, testing knowledge, and familiarity with CI/CD and monitoring practices. 🗂️ Requirements: 4+ years of professional experience with NodeJs, 4+ years of professional experience with Python, 4+ years of professional experience with MongoDB, 4+ years of professional experience with MQTT, 4+ years of professional experience with AWS, Backend development experience, Experience building web applications and APIs, Ability to write clean, maintainable code, Knowledge of SOLID principles, Experience with testing strategies and implementations, System design experience from ambiguous requirements, Understanding of CI/CD practices, Experience with logging and monitoring tools, Knowledge of version control best practices 📃 Skills: NodeJs, Python, MongoDB, MQTT, AWS, Go, APIs, CI/CD, SOLID, Git, Testing, Monitoring, Logging 🏢 Description: Introduction & Summary: We are seeking an experienced Senior Backend Engineer who will be responsible for building and maintaining robust backend systems. The ideal candidate will possess a strong background in backend development, particularly with NodeJs, Python, MongoDB, MQTT, and AWS. A proactive problem-solver with a focus on clean, maintainable code and system design will thrive in this role. Main Responsibilities: Participate in all stages of the development and post-development lifecycle Proactively provide creative, thorough, and practical solutions to technical problems Design, write, and maintain well-organized, scalable, and testable code Identify and address issues and bottlenecks, advocating for changes Promote best practices and code quality within the team Contribute to refining technical vision and aligning it with business objectives Mentor and guide junior engineers Key Requirements: Hands-on experience in backend development and engineering At least 4 years of professional experience with NodeJs, Python, MongoDB, MQTT, and AWS Experience with GO is advantageous Proven experience in building web applications and APIs Ability to write clean, maintainable code and apply SOLID principles Experience with various testing strategies and implementations Capability to design systems from ambiguous product requirements Understanding of continuous integration and delivery Proficiency with logging and monitoring tools Knowledge of version control best practices Proactive mindset emphasizing continuous improvement and learning Nice to Have: Strong problem-solving skills and critical thinking regarding technical challenges Flexibility and willingness to adapt to changing priorities and technologies Other Details: This role offers a dynamic work environment with opportunities for growth and development. Ideal candidates will commit to excellence and a proactive approach in their work.

🏢 Summary: The offer is for a Senior Python Backend Engineer to design and maintain scalable, cloud-native backend systems on AWS, including REST APIs and AI/LLM integrations. The role focuses on distributed systems, asynchronous processing, observability, and high code quality within a modern CI/CD environment. It involves working with both serverless and containerized deployments in a collaborative, agile team. 🗂️ Requirements: 3–5+ years of professional Python backend development experience, Experience building cloud-native systems on AWS, Strong knowledge of REST API design and OpenAPI, Experience with asynchronous processing and queue-based architectures, Hands-on experience with core AWS services (Lambda, API Gateway, S3, IAM, ECS/EKS, CloudWatch), Knowledge of DynamoDB and NoSQL data modelling, Knowledge of PostgreSQL, SQL, and relational data modelling, Experience with serverless and containerized deployments, Experience integrating external APIs and third-party services, Experience with automated testing using pytest, Familiarity with CI/CD tools, Understanding of distributed systems, scalability, and reliability, Practical understanding of LLM-based or AI-driven applications, Ability to apply SOLID principles and clean code practices, Fluent English (written and spoken) 📃 Skills: Python, AWS, FastAPI, Pydantic, SQLAlchemy, boto3, REST, OpenAPI, Celery, SQS, Lambda, ECS, EKS, S3, CloudFront, IAM, SecretsManager, CloudWatch, DynamoDB, PostgreSQL, SQL, pytest, GitHubActions, Jenkins, NewRelic, Docker, Kubernetes, LLM, Cursor, Claude, Copilot 🏢 Description: We are looking for a Senior Python Backend Engineer with experience in building cloud-native backend systems on AWS. This role is focused on designing, developing, and maintaining scalable Python services, integrating AI/LLM-based capabilities, working with distributed systems, and ensuring high reliability, observability, and code quality. Your responsibilities: Design, build, and maintain backend services using Python in an AWS-based environment. Develop and maintain REST APIs together with clear OpenAPI documentation. Implement asynchronous processing and queue-based communication between services. Design data access patterns for application features using NoSQL and SQL storage. Integrate backend services with internal systems, external APIs, and AI/LLM-based components. Implement reliable communication patterns, including retries, timeouts, and circuit breakers. Build and maintain operational CLI tooling for day-to-day platform tasks (e.g. content ingestion). Contribute to architectural decisions across software and infrastructure as the stack evolves. Create observability for distributed systems, including logging, metrics, tracing, and alerting. Write automated tests and support high code quality across the backend codebase. Contribute to CI/CD processes and deployment automation. Collaborate with product, frontend, QA, DevOps, AI/ML teams, and content creators. Review code, share knowledge, and raise the bar for engineering practice across the team. We are looking for you, if you have: 3–5+ years of professional experience in Python backend development. Solid understanding of REST API design and OpenAPI standards. Experience with asynchronous processing and queue-based architectures, e.g. Celery, SQS. Experience with libraries and frameworks such as FastAPI, Pydantic, SQLAlchemy, boto3. Hands-on experience with core AWS services such as Lambda, API Gateway, S3, CloudFront, Secrets Manager, IAM, ECS/EKS, CloudWatch, etc. Good knowledge of DynamoDB and NoSQL data modelling. Good knowledge of PostgreSQL, SQL, and relational data modelling . Experience with both serverless (Lambda) and containerized (ECS/EKS) deployment models. Experience integrating with external APIs and third-party services. Experience with pytest and automated testing practices. Familiarity with CI/CD tools such as GitHub Actions and/or Jenkins. Experience with observability tools such as New Relic and CloudWatch. Understanding of distributed systems, scalability, reliability, and fault tolerance. Ability to apply SOLID principles, clean code practices, and common design patterns. Practical understanding of LLM-based applications or AI agentic frameworks. Ability to use AI development tools such as Cursor, Claude Code, or GitHub Copilot. Experience working in agile software development teams. Fluent English, both written and spoken. We offer: Participation in interesting and demanding projects. Flexible working hours. A great, non-corporate atmosphere. Possibility to work remote or hybrid (2 days per week from the office). Opportunities for development and promotion. Attractive package of benefits. We reserve the right to contact the selected candidates.

🏢 Summary: Senior backend role focused on building and maintaining innovative, cloud-native applications leveraging smart meter data and real-time processing for operational use cases. The position involves developing scalable backend systems, real-time architectures, and automated cloud infrastructure using modern DevOps practices. You will collaborate closely with technical teams and end users to deliver high-performance, reliable solutions. 🗂️ Requirements: Minimum 5 years backend development experience, Extensive experience with Python, Experience with PostgreSQL and PostGIS, Experience with FastAPI and WebSockets, Experience with Docker and Kubernetes, Knowledge of CI/CD pipelines, Experience with AWS or other cloud environments, Experience with Infrastructure as Code, Fluent Dutch language skills 📃 Skills: Python, PostgreSQL, PostGIS, FastAPI, WebSockets, Docker, Kubernetes, AWS, EKS, Redis, Kafka, ArgoCD, CI/CD, CDK, GitOps, IaC 🏢 Description: Als senior backend developer werk je samen met gebruikers aan innovatieve applicaties rondom slimme meterdata en real-time dataverwerking. Je draagt bij aan oplossingen die direct worden ingezet in operationele processen zoals crisismanagement, netbeheer en veldwerkondersteuning. Je werkt in een omgeving waarin real-time data centraal staat en waar moderne backend-technologieën worden toegepast. De infrastructuur is cloud-based en volledig geautomatiseerd ingericht met moderne DevOps-principes. De applicaties variëren van intuïtieve webinterfaces tot dynamische kaartlagen en real-time datavisualisaties. Er wordt continu geïnnoveerd met de nieuwste technieken en standaarden, met veel aandacht voor schaalbaarheid, betrouwbaarheid en performance. De functie is bedoeld voor een Nederlandssprekende consultant die actief samenwerkt met zowel technische teams als eindgebruikers. Tech stack & omgeving Je werkt o.a. met: Python PostgreSQL / PostGIS FastAPI WebSockets Redis Kafka Kubernetes AWS (EKS) Argo CD (GitOps CI/CD) Infrastructure as Code (AWS CDK) De applicaties draaien in een cloudomgeving en worden volledig automatisch gedeployed via CI/CD pipelines. Infrastructuur wordt reproduceerbaar en schaalbaar uitgerold via IaC. Main Responsibilities Ontwikkelen van innovatieve webapplicaties op basis van slimme meterdata Bouwen en onderhouden van backend-systemen Werken met real-time data-architecturen Implementeren van nieuwe features en verbeteringen Automatiseren van deployment- en infrastructuurprocessen Samenwerken met frontend developers en eindgebruikers om de gebruikerservaring te optimaliseren Actief bijdragen aan code reviews en teamkwaliteit Key Requirements Minimaal 5 jaar ervaring als backend developer Uitgebreide ervaring met Python Ervaring met PostgreSQL / PostGIS Bekend met FastAPI en WebSockets Ervaring met Docker en Kubernetes Kennis van CI/CD pipelines Ervaring met cloudomgevingen (bij voorkeur AWS) Ervaring met Infrastructure as Code (IaC) Nice to Have Ervaring met Redis en Kafka Ervaring met real-time of geavanceerde datavisualisatie Ervaring in multidisciplinaire agile teams Other Details 32–40 uur per week Hybride of remote werken mogelijk Werken aan impactvolle applicaties met directe invloed op operationele processen Moderne, cloud-native ontwikkelomgeving met focus op innovatie en schaalbaarheid

🏢 Summary: Senior Backend Developer role focused on designing, developing and scaling a modern web platform using Python and Django. The position involves architectural decisions, performance optimization, async processing and integrations with external systems. Strong ownership of code quality and technical direction is expected. 🗂️ Requirements: Minimum 5 years of backend development experience, Strong knowledge of Python, Commercial experience with Django, Experience with Django REST Framework, Practical experience with PostgreSQL, Experience with Docker and Docker Compose, Knowledge of asynchronous processing (Celery, Redis, queues), Ability to design and document REST APIs, Experience with system architecture and scalability, Experience with external API integrations 📃 Skills: Python, Django, DRF, PostgreSQL, Docker, Redis, Celery, REST, API, Angular, CQRS, DDD 🏢 Description: Szukamy doświadczonego Senior Backend Developera , który pomoże nam rozwijać i skalować nowoczesną platformę webową. Jeśli Backend to Twoje naturalne środowisko, a architektura, jakość kodu i odpowiedzialność techniczna są dla Ciebie ważniejsze niż „feature factory” – zapraszamy. Zakres obowiązków: Projektowanie i rozwój Backendu w Pythonie ( Django / Django REST Framework ) Współtworzenie architektury systemu (monolit + integracje, async, background tasks) Optymalizacja wydajności i skalowalności aplikacji Integracje z systemami zewnętrznymi (API, webhooki, płatności, usługi third-party) Dbanie o jakość kodu: code review, testy, dobre praktyki Współpraca z frontendem (Angular) i zespołem produktowym Realny wpływ na decyzje technologiczne Wymagania: Minimum 5 lat doświadczenia w Backendzie Bardzo dobra znajomość Pythona i Django Doświadczenie z Django REST Framework Praktyczna znajomość baz danych PostgreSQL Doświadczenie z Docker / Docker Compose Znajomość zagadnień async (Celery, Redis, kolejki) Umiejętność projektowania API i pracy z dokumentacją Samodzielność, odpowiedzialność i techniczne myślenie Mile widziane: Doświadczenie w projektowaniu większych systemów (DDD, CQRS, wzorce projektowe) Praca z systemami legacy i ich stopniową refaktoryzacją Doświadczenie w edukacji online / platformach SaaS Znajomość Angulara (na poziomie współpracy z FE) Oferujemy: Realny wpływ na produkt i architekturę Pracę przy sensownym, długoterminowym projekcie Dużą autonomię techniczną Elastyczne godziny pracy i pracę zdalną Współpracę B2B lub UoP Wynagrodzenie adekwatne do doświadczenia Jeśli lubisz backend, który ma znaczenie , a nie tylko „kolejne endpointy” - odezwij się. Etapy rekrutacji: 1. Zaproszenie na video screening 2. Zadanie rekrutacyjne sprawdzające znajomość DRF 3. Rozmowa miękko-techniczna -> po ok. 5 dniach od odesłania zadania, po pozytywnej jego ocenie umawiamy spotkanie online (ok. 40-min.) + krótki test kompetencji logicznych (online 40 minut)

🏢 Summary: Senior Backend Engineer role focused on designing and developing modern financial applications and advanced monitoring systems in AWS cloud environments. The position involves backend development using C# and .NET technologies, applying DDD and CQRS patterns, and contributing to cloud-based banking solutions. The engineer works on scalable web applications and cloud services supporting operational processes. 🗂️ Requirements: 5+ years of commercial experience in web application development, Strong experience in C# development, Experience with SQL databases, Experience building web applications using .NET technologies, Professional proficiency in English 📃 Skills: C#, .NET, ASP.NET, AWS, Fargate, Lambda, S3, EventBridge, SQL, NoSQL, Jira, Confluence, Git, Rider, VisualStudio, DDD, CQRS 🏢 Description: The scope of your role: As a Senior Backend Engineer, you will take part in the process of the design and development of modern financial applications. You will develop advanced monitoring systems used in running operations in the AWS cloud environments. You will have an impact on our applications by working closely with businesses and clients who use our banking products. You will work with C#, .NET, ASP.NET, AWS ( incl. fargate, lambda, S3, event bridge), Jira, Confluence, Git, and Rider/Visual Studio. You will use DDD and CQRS. You will work using modern AI dev tools. Required qualifications: 5+ years of commercial experience in creating web applications. Solid experience developing applications using C#. Solid experience in working with SQL databases. Willingness and interest to collaborate and work in a team. Preferred qualifications: Experience with software engineering best practices (code reviews, continuous integration, continuous deployment, testing). Exposure to Agile development methodologies. Familiar with Web services/web API. Familiar with the AWS platform. Experience in working with NoSQL databases. About you? You are a creative and curious person with a genuine interest in software development. We are always looking for new knowledge and have a curiosity out of this world, we think that you have the same mindset and you are excited to read about the latest tech trends. You might also, like us, love to write nice and high-quality code. We hope you are not afraid to inform us about problems and have your thoughts on various solutions. You are a team player and used to work in an Agile environment. Since we are a multicultural team English is the required language.