Find your next tech and IT Job or contract Java Developer (Kotlin, Groovy...)

The Java developer is a web and application development professional specialized in using Java, a server-oriented programming language. They are also called: Java programmer, Java programmer-analyst, Java software development engineer. This IT technician analyzes the specifications provided by the client to identify a technical solution that meets their technical and functional requirements point by point. They are then responsible for custom designing all or part of the computer program in Java. Then comes the trial and testing phase of the applications. Once the program is operational, they can proceed with writing technical documentation and user guides. The Java developer can progress towards supervisory positions, project manager, IT technical manager or even a commercial career.

Your search returns 793 results.
Permanent

Job VacancyDéveloppeur Fullstack Java Paiements (Luxembourg)

EXMC
Published on
Angular
Java
Linux

Luxembourg
· Développement d'une application interne dédiée à la gestion des flux de paiement, comprenant : · Contrôles des paiements · Vérifications de conformité · Gestion des exceptions · Alignement sur les exigences de la version 2026 du SEPA (SR2026) · Migration et conformité aux normes ISO 20022 Expertise : · La fiabilité et l'évolutivité du système · La stabilité de la production et l'excellence opérationnelle · La conformité aux normes réglementaires et aux standards du marché Remédiation des incidents récurrents sur la chaine de paiements Revue du monitoring des applications ainsi que du process d'alerting La remédiation des vulnerabilités / obsocolescences · Serveur LINUX · Montée de version JAVA et autres composants Développement · Concevoir et développer des composants backend en Java / Spring Boot. · Implémenter des API REST et des flux de messagerie (IBM MQ, QMS). · Garantir la conformité aux normes ISO 20022 pour le traitement des messages et aux standards XML. · Rédiger un code propre, maintenable et testable, en appliquant les bonnes pratiques de développement. Tests et assurance qualité · Développer et exécuter des tests unitaires et des tests d'intégration. · Assurer une couverture de code élevée à l'aide de JUnit et JaCoCo. · Contribuer aux tests de non-régression et aux tests de bout en bout (End-to-End). · Identifier, analyser et corriger les anomalies. Qualité du code et revues · Participer aux revues de code. · Veiller au respect des standards de développement et des critères de qualité définis par SonarQube. · Contribuer à l'amélioration continue des pratiques de développement. Documentation · Produire la documentation technique (architecture, conception, API). · Maintenir la documentation des API à l'aide d'OpenAPI / Swagger. · Documenter les flux d'intégration et les interfaces. Support de production (Niveau 3) · Assurer le support de niveau 3 (L3) sur la chaîne de traitement des paiements. · Analyser et résoudre les incidents de production. · Investiguer les problèmes liés aux paiements (rejets, écarts de rapprochement, etc.). · Contribuer à la stabilisation et au renforcement de la fiabilité des environnements de production. · Réaliser des analyses des causes racines (Root Cause Analysis) et mettre en œuvre les actions correctives. Collaboration et livraison · Participer aux cérémonies Agile (Scrum ou méthodologie similaire). · Suivre et communiquer l'avancement des travaux, les risques et les points de blocage.
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Permanent

Job VacancyArchitect Logiciel Java H/F

Grafton
Published on

Aix-en-Provence, Provence-Alpes-Côte d'Azur
Grafton recrute : Architecte Logiciel (H/F) Secteur : systèmes critiques À propos du poste Grafton accompagne un acteur majeur des systèmes critiques dans le recrutement d'un Architecte Logiciel. Vous participerez à la conception de logiciels déployés dans des environnements exigeants. Ces systèmes permettent de partager, analyser et exploiter l'information tactique en temps réel, avec un niveau de fiabilité indispensable. Votre rôle est stratégique : vos choix d'architecture influencent directement la performance opérationnelle des utilisateurs finaux. Missions Conception et architecture Définir l'architecture logicielle de haut niveau des différents composants. Garantir la cohérence entre l'architecture cible et sa mise en œuvre. Piloter les interfaces logicielles et assurer leur robustesse. Auditer les architectures existantes et anticiper les risques. Étudier les problématiques émergentes liées aux systèmes tactiques. Diffuser les bonnes pratiques auprès des équipes de développement. Contrôler la qualité du code et le respect des méthodologies. Participer aux phases d'avant‑vente et présenter les solutions aux parties prenantes. Vous évoluerez au sein d'équipes pluridisciplinaires : développeurs, analystes fonctionnels, experts métier Environnement technique Modélisation : UML, SysML, BPMN, Enterprise Architect Langages : Java et autres langages orientés objet Contexte : systèmes complexes, environnements contraints, fonctionnement parfois déconnecté Profil recherché Bac+5 en informatique. Dix ans d'expérience en développement, dont au moins cinq ans en architecture applicative. Solide maîtrise de la modélisation logicielle et système. Connaissance des standards d'ingénierie système. Compréhension approfondie des problématiques de développement. Anglais technique requis. Proactivité, autonomie, sens des responsabilités.
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Permanent

Job VacancyTech Lead Java H/F

Grafton
Published on

Aix-en-Provence, Provence-Alpes-Côte d'Azur
Tech Lead Java H/F Localisation : Six-Fours-Les-Plages Secteur : systèmes critiques À propos du poste Grafton accompagne un acteur majeur des systèmes critiques dans le recrutement d'un expert Java Vous participerez au développement de logiciels déployés dans des environnements exigeants. Ces systèmes permettent de représenter une situation tactique en temps réel, de coordonner des unités et d'exploiter des flux d'informations provenant de multiples capteurs. En tant que référent technique, vous jouerez un rôle central dans la qualité, la robustesse et l'évolution des solutions. Missions Être la référence technique de l'équipe sur votre périmètre. Accompagner les développeurs et contribuer à leur montée en compétence. Arbitrer les choix techniques et garantir leur cohérence dans le temps. Contribuer à la conception détaillée et à l'évolution de l'architecture logicielle. Mettre en place et faire évoluer les pratiques DevSecOps et les pipelines CI/CD. Automatiser les tests et garantir la qualité et la sécurité des systèmes. Être l'interlocuteur technique privilégié des architectes et des parties prenantes. Vous interviendrez sur des systèmes critiques fonctionnant en environnement contraint, parfois déconnecté, avec des exigences de fiabilité élevées. Environnement technique Langages : Java, C++, Python, Angular Pratiques : DevSecOps, CI/CD, tests automatisés Contexte : systèmes complexes, haute disponibilité, contraintes opérationnelles Profil recherché Bac+5 en informatique. 10 à 15 ans d'expérience en développement orienté objet. Maîtrise approfondie de Java, C# ou C++. Connaissance des normes qualité logicielle appliquées aux systèmes critiques. Expérience des cycles de développement normés (cycle en V, DO‑178 ou équivalent). Maîtrise des tests : unitaires, intégration, qualification, recette. Capacité à produire une documentation technique rigoureuse. Connaissance des pratiques DevSecOps. Capacité à transmettre et à faire grandir une équipe technique. Anglais technique requis.
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Permanent

Job VacancySenior Backend Developer with C# .net Framework

Nexus Jobs Limited
Published on

£50k-80k
United Kingdom
Senior Backend Developer with C# .net Framework Working as part of the Digital team, you'll be responsible for the ongoing development and improvements to an eCommerce website as well as other internal applications for this award-winning Travel Company. You will be responsible for: Leading the eCommerce web and application development from a technical perspective Collaborating with the front end developer and design resource to deliver improved UI & UX A problem solver - you'll need to be able to analyse and suggest improvements to existing website features Analysing and identifying ways to automate processes working alongside the business lead Implementing automated regression testing for the software developed Skills and Experience: Excellent working knowledge of ASP.NET, C#, HTML, JavaScript, jQuery, React Framework, MS SQL Server, Mongo DB, Elasticsearch Understanding of SOLID development principles Worked previously on projects using the Umbraco CMS Continuous Delivery skills, tools and techniques (e.g. Git, Github, Team City, Octopus, Jenkins, Selenium, etc.) Familiar with Azure cloud services & setting up/managing resources/deploying apps Familiar with JIRA and Confluence Capable of working with (and developing) multiple (REST) APIs documented with e.g. OpenAPI/swagger and other API messaging formats e.g. JSON, XML, SOAP Experience of PowerBI, PowerQuery and R Experience of structured testing and quality assurance approaches (e.g. Test Driven Development and Behaviour Driven Development) A positive and cooperative individual who will work effectively across departments and within a team Worked in an agile/Kanban environment and familiar with JIRA and confluence Not afraid to challenge existing thinking in order to improve processes The Client will consider candidates with solid Backend development skills without Umbraco. The salary for this role will be in the range £50K to £80K per year depending on experience. The Client is based in Central London and this role will be working remotely. Do send your CV to us in Word format along with your salary and availability.
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Contractor

Contractor jobTech Lead Fullstack Java Angular

PROPULSE IT
Published on
Angular
Java

24 months
325-650 €
Paris, France
PROPULSE IT recherche un Techlead Fullstack Java Angular avec plus de 10 ans d'expériences. Prise de connaissance de l'architecture technico-fonctionnelle Participation aux Daily Meeting, à l'estimation et la priorisation du backlog Prise en charge des études, conception, et réalisation de l'architecture avec prise en compte des exigences et contraintes Chiffrage des User Stories et participation à la roadmap produit ; participation aux ateliers UX-DESIGN Prise en charge des User Stories Développement des fonctionnalités priorisées et des améliorations techniques ; code review ; merge request ; commit Développement des tests unitaires, fonctionnels, d'intégration et de performance Démonstration des fonctionnalités développées lors des réunions d'itérations Rédaction de la documentation technique Revue de code, refactoring, optimisation Diagnostic et analyse de dysfonctionnements, support aux équipes Tierces, pour être garant des performances et de la haute disponibilité de la solution Accompagnement et communication, partage des concepts, et formation Co-assurer (avec le PPO et le DL) de manière générale la communication transverse et faciliter les échanges entre le PPO et les développeurs ; échanger avec les parties prenantes du projet (fournisseurs et consommateurs de flux de données, équipes transverses de la DSI telles que : exploitant, supervision, intégrateur, monitoring) ; participer à la communauté des DEV Déploiement des Release et versions pour les divers environnements ; Livraison finale ; Mise en Service (MeS) ; REX fin de projet Maintien en condition opérationnelle (MCO) de la solution et des produits Co-assurer (avec le PPO et le DL) la communication avec le Client jusqu'à résolution effective d'un incident ; co-participation au REX incident
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Permanent

Job VacancyDéveloppeur Java/React H/F

VIVERIS
Published on

50k-60k €
Boulogne-Billancourt, Ile-de-France
Contexte de la mission: Nous recherchons un développeur Fullstack Java/React - Confirmé/Sénior Dans le cadre du projet Référentiel Valeurs, visant à centraliser, fiabiliser et gouverner l'ensemble des données relatives aux instruments financiers, vous rejoignez la squad Applicative composée de 3 développeurs Logiciel, d'un Architecte technique, d'un Business Analyst et d'un Product Owner. Vos missions : - Conception et développement des composants applicatifs : Concevoir, développer et maintenir les applications du socle MDM, permettant la consultation, le référencement et l'administration des données d'instruments financiers - Développement back-end en Java : Implémenter des API REST performantes et sécurisées pour exposer les données du MDM vers les applications internes et partenaires - Conception de l'IHM en React (portail de consultation MDM) : Participer au développement de l'interface utilisateur (React) permettant la recherche, la visualisation et la gestion des données Golden Copy - Sécurité et conformité : Intégrer les standards du groupe en matière de sécurité et d'authentification (OIDC, OAuth2, gestion des rôles et permissions) - Optimisation et performance : Surveiller les performances applicatives, identifier les points de blocage et proposer des améliorations continues - Documentation et qualité logicielle : Documenter le code, les API, et les règles de gestion ; rédiger les guides de déploiement et de maintenance
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Permanent

Job VacancySenior Backend Developer with Umbraco C# .net

Nexus Jobs Limited
Published on

£55k-75k
United Kingdom
Senior Backend Developer with Umbraco C# .net Working as part of the Digital team, you'll be responsible for the ongoing development and improvements to an eCommerce website as well as other internal applications for this award-winning Travel Company. You will be responsible for: Leading the eCommerce web and application development from a technical perspective Collaborating with the front end developer and design resource to deliver improved UI & UX A problem solver - you'll need to be able to analyse and suggest improvements to existing website features Analysing and identifying ways to automate processes working alongside the business lead Implementing automated regression testing for the software developed Skills and Experience: Excellent working knowledge of ASP.NET, C#, HTML, JavaScript, jQuery, React Framework, MS SQL Server, Mongo DB, Elasticsearch Understanding of SOLID development principles Worked previously on projects using the Umbraco CMS Continuous Delivery skills, tools and techniques (e.g. Git, Github, Team City, Octopus, Jenkins, Selenium, etc.) Familiar with Azure cloud services & setting up/managing resources/deploying apps Familiar with JIRA and Confluence Capable of working with (and developing) multiple (REST) APIs documented with e.g. OpenAPI/swagger and other API messaging formats e.g. JSON, XML, SOAP Experience of PowerBI, PowerQuery and R Experience of structured testing and quality assurance approaches (e.g. Test Driven Development and Behaviour Driven Development) A positive and cooperative individual who will work effectively across departments and within a team Worked in an agile/Kanban environment and familiar with JIRA and confluence Not afraid to challenge existing thinking in order to improve processes The salary for this role will be in the range £55K to £75K per year depending on experience. The Client is based in Central London and this role will be working remotely. Do send your CV to us in Word format along with your salary and availability.
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Permanent

Job VacancyFull Stack Software Developer with C# Asp.net

Nexus Jobs Limited
Published on

£55k-75k
Basildon, England, United Kingdom
Fullstack Software Developer with C# Asp.net Our Client is an established is a recognised leader with a widely used commercial software in the financial markets. They are now looking for additional personnel to join the software development team with extensive proven expertise in developing software with C# with .net core – you must have at least 5 to 7 years experience. Personal Responsibilities: The Client is looking for a creative, detail-orientated Web Software Developer to join our Web Development team. Within the Web Development team, you will have the opportunity to enjoy working with a range of web technology across the full stack. The Company's client base is growing and as part of this growth we are looking to improve and enhance our web-oriented product offerings. We are looking to recruit highly motivated and creative web developers who can be instrumental in delivering an ambitious digital roadmap. Previous Experience/Education: Web Developers at this Company don't always need industry-specific work experience, but they must be able to demonstrate their web software coding capability in organisations of a similar size and complexity. Ideally, looking for Web Developers with 5 plus years work experience. Additionally, candidates should be experienced in debugging and profiling applications associated with developing, testing and deploying web applications. It is preferable for Web Developers to hold a degree in Computer Science or a related field. Successful Web Developers should have sound knowledge and experience in different programming applications. C#, Asp.net/Core, JavaScript, HTML, CSS, MVC and JSON are required core skills. Function: Candidates should be able to demonstrate strong ability to work independently and as part of a team building websites from the ground up in C#, MVC, Asp.net and Asp.net core. The successful candidate should have a good command of C#, HTML, CSS, JavaScript, JSON & Bootstrap. Exposure to any UI binding framework such as Vue.js, AngularJS, React, and Knockout would be beneficial. Additionally, the candidate should be comfortable using IIS. Full understanding of the MVC pattern, REST APIs and asp.net controllers are a must. Web developers should be aware of security vulnerabilities, such as those identified in OWASP, and their code should mitigate these threats. Required: Web Developers need experience in the design, creation and maintenance of websites across multiple platforms. The most important duties and responsibilities of the Web Developer include: Writing efficient code using best practice for software development Creating websites using different languages such as HTML and CSS Working with Programmers and Web Designers to create a website that matches the visual design intent Communicating with business colleagues to gather and refine requirements and specifications for content development within agreed-upon timelines Researching a variety of software programs Creating and maintaining the documentation for software used Improving and enhancing websites after they have been created Skills Required: A successful Web Developer candidate will have various prerequisite skills/qualifications needed for duties such as a Degree in Computer Science or related field). Some skills include, but are not limited to, the following: Strong interpersonal skills and the ability to establish and maintain close working relationships with business stakeholders and other technologists A pro-active approach with a keen attention to detail Proactive with a keen desire to take ownership of projects Functional knowledge and coding experience Basic knowledge of search engine optimisation (SEO) The ability to multitask within the budgets and time constraints set by the company Strong communication and problem-solving skills An understanding of development approaches and methods Knowledge of mobile applications, computer operating systems and web browsers Strong analytical skills The salary for this position with be in the range £55K - £75K plus benefits. The Client has offices in the City of London and close to Basildon in Essex. Currently this role will be based 2 days at the office in Essex and 3 days remote working. Please send your CV to us In Word format along with your salary and notice period.
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Fixed term

Job Vacancy.NET Developer (h/f)

emagine Consulting SARL
Published on

12 months
€45k-60k
1000, Brussels, Brussels-Capital, Belgium
Summary: We're looking for a highly skilled .NET Developer with a minimum of 5 years of experience. This role focuses on solving complex problems, building high-quality software, and contributing to a collaborative engineering culture. The candidate should be passionate about clean architecture, modern .NET development, and delivering impactful solutions. Responsibilities:Analyze, design, develop, and maintain applications using .NET / .NET Core. Build scalable backend services (APIs). Collaborate with cross-functional teams (Business, Dev, Infra, etc.). Participate in code reviews to elevate engineering standards. Contribute to architectural decisions and technical roadmaps. Provide business support and monitor applications (level 2 support, incident resolution, and troubleshooting). Key Requirements:Strong experience with C# and .NET Core. Solid understanding of REST APIs, Entity Framework Core, and SQL. Familiarity with cloud platforms (Azure or AWS). Experience with CI/CD pipelines and version control (Git). Strong testing culture: unit tests, integration tests, and production validation. Familiarity with agile development practices. A mindset focused on quality, performance, and maintainability. Experience with a message broker. Nice to Have:Knowledge of microservices architecture. Experience with front-end frameworks (Angular). Background in distributed systems or high-availability environments. Knowledge of Docker & Kubernetes. Experience with Azure functions. Other Details:This position allows for flexibility and may accommodate remote work arrangements. Candidates should be prepared for collaborative team engagements with a focus on delivering high-quality software solutions.
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Contractor
Permanent

Job VacancyDéveloppeur Senior Fullstack SpringBoot VueJS, Node, JavaSpring, IA, Kafka H/F Lille

HELPLINE
Published on
Java
Springboot

3 years
40k-45k €
400-490 €
Lille, Hauts-de-France
Temps complet Niveau d'expérience: 5-10 ans Département: Fonctions de consulting Type de contrat: CDI OU FREELANCE PORTAGE Rémunération: EUR 38 500 - EUR 50 000 - annuel Description de l'entrepriseLocalisation : Marcq-en-Barœul, France Temps complet Niveau d'expérience : Minimum 5/6 ans Département : Tous Type de contrat : CDI Description du posteAu sein d'un environnement Agile, collaboratif et innovant, vous intervenez sur la conception, le développement et le déploiement d'une solution web moderne, robuste et hautement évolutive. Vos missions principales : Développement Fullstack : Concevoir et coder les modules Front et Back en phase avec la roadmap produit. Architecture & Choix techniques : Contribuer activement aux choix d'architecture, à l'optimisation des performances et à l'amélioration continue du code. Intégration Tech : Mettre en œuvre et intégrer des briques d'IA Générative pour optimiser l'application métier. Cérémonies Agile : Participer activement aux rituels Scrum (Daily, Sprint Planning, REX…). Mentorat : Accompagner, guider et faire monter en compétences les autres développeurs de l'équipe. Qualité logicielle : Assurer la rédaction des tests unitaires, d'intégration, ainsi que la documentation technique associée. QualificationsCe poste est fait pour vous si : Expérience : Vous justifiez d'au moins 6 ans d'expérience en développement Web (hors alternance). Expertise Backend (Le Must-Have) : Maîtrise absolue de Node.js et TypeScript, VueJS, Node, JavaSpring, IA, Kafka. Expertise Frontend (Confirmé) : Solide expérience sur React (l'ancienne stack Angular/Python étant migrée). Base de données : Excellente maîtrise de PostgreSQL. Innovation : Première expérience ou forte appétence pour l'intégration de cas d'usage liés à l'IA Générative. Outils & Méthodologie : Pratique courante de l'environnement Git / GitLab et parfaite culture Agile (Scrum). Compétences appréciées : Sensibilité UI/UX et algorithmique. Connaissance des environnements industriels et logistiques complexes. Soft Skills attendus : Rigueur, autonomie et forte capacité d'analyse pour résoudre les problématiques complexes. Proactivité, sens du collectif et communication fluide. Anglais technique. Informations complémentaires Type de contrat : CDI OU FREELANCE Durée du travail : Temps plein Salaire : Selon profil et expérience Secteur : Développement logiciel / services numériques
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Permanent

Job VacancyGeospatial Developer

CGI
Published on

United Kingdom
Do you enjoy solving complex challenges with geospatial technology? Are you keen to see your work making a real difference in both public and commercial sectors? If you're ready to grow your skills and contribute to innovative projects, join our expanding Geospatial team at CGI as a Geospatial Developer. We work on projects that enhance services, transform organisations and ultimately make everyday life easier for people. At CGI, you'll be part of a collaborative, supportive environment where your development matters as much as the solutions you create. CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named one of the 'World's Best Employers' by Forbes magazine. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching) which makes you a member not just an employee. We are committed to inclusivity, building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector, including our Armed Forces, and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant. Join us and you'll be part of an open, friendly community of experts. We'll train and support you in taking your career wherever you want it to go. This is a hybrid working pattern role and you may need to travel occasionally within the UK as needed – ideally you will be based within a commutable distance to one of the following CGI offices London, Bristol, Birmingham, Reading, or Glasgow, but we will consider candidates from other UK locations. All applicants must hold or be prepared to undergo National Security Vetting (NSV) to Security Check (SC) level as a minimum.
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Frequently asked questions about working as a Java Developer (Kotlin, Groovy...)

What is the role of a Java Developer (Kotlin, Groovy...)

The Java developer is a computer specialist who focuses on designing software and websites. As the name implies, they have Java programming language down pat! Passionate and versatile, the Java developer must possess solid technical skills and some essential qualities to provide their client with a customized IT solution.

How much does a Java Developer (Kotlin, Groovy...) charge

The mastered frameworks, the company's sector, its location and the technical issues to be solved are all criteria that affect the Java developer's salary. Nevertheless, their daily rate is relatively high, even for a beginner. The latter earns an average of 483 euros per day. Their salary will be around £40K.

What is the definition of a Java Developer (Kotlin, Groovy...)

The Java developer creates applications at the client's request using their preferred language: Java. For this purpose, they must comply with the requirements provided in the specifications. They develop the application, then manage the testing phase as well as maintenance and update planning

What type of mission can a Java Developer (Kotlin, Groovy...) handle

The tasks generally assigned to a Java developer are: • Definition of client needs; • Application programming; • Development of website structure; • Writing explanatory notes so that the written code lines are understandable by other stakeholders; • Adding new functionalities and improving the performance of an existing application; • Performing unit tests and integration tests; • Technical support; • Updating existing code.

What are the main skills of a Java Developer (Kotlin, Groovy...)

Knowledge of Java language must be complemented by knowledge of: • The J2EE development platform; • Other programming languages; • Oracle and SQL databases; • Tools and frameworks such as Spring, Spring boot, React, Angular, Hibernate, AWS, GWT, Struts or Docker; • Algorithms; • Security standards and procedures to combat cyberattacks; • The business environment (market, services, customers). Those who wish to work as Java developers must also master English.

What is the ideal profile for a Java Developer (Kotlin, Groovy...)

In addition to the diploma and technical skills, recruiters require future Java developers to be: • Rigorous and precise in writing code; • Creative; • Good listeners; • Able to work in an agile environment; • Flexible and available; • Able to communicate and explain their knowledge to non-technical people; • Curious, as computer programs and languages are constantly evolving. A strong sense of analysis and organization is also required!

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