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.

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Fixed term

Job Vacancy
Technical Architect

LA International Computer Consultants Ltd
Published on

6 months
United Kingdom
* Significant experience as a technical or solution architect in complex digital or enterprise environments. * Strong software engineering foundation, with practical knowledge of modern application architectures (e.g., microservices, APIs, distributed systems). * Proven ability to design and document architectures using visual modelling techniques such as C4, UML, and data flow diagrams. * Hands-on experience with at least one major cloud provider, ideally AWS, including Infrastructure as Code, platform services, networking, and security controls. * Deep understanding of secure and resilient system design, including authentication patterns, threat modelling, performance considerations, and observability. * Familiarity with Ruby, Python, or Java, and modern development practices such as CI/CD, TDD, and containerisation. * Experience guiding technology decisions, evaluating options, and influencing senior stakeholders. * Strong understanding of data modelling, integration approaches, API design, messaging patterns, and interoperability challenges. * Exceptional communication skills, with the ability to simplify complex topics and build consensus across diverse groups. * Ability to work across the full delivery lifecycle, from discovery through implementation and service transition. Desirable Skills & Experience * Experience with enterprise ERP platforms (e.g., Oracle E-Business Suite). * Knowledge of UK government digital service standards, architecture frameworks, and assurance processes. * Understanding of Domain-Driven Design or event-driven architectural approaches. * Exposure to SRE, platform engineering, or infrastructure architecture disciplines. * Experience contributing to architectural communities of practice or governance forums. * Prior consultancy experience working across multiple product teams or client environments. Personal Attributes * Strong systems thinking and analytical capability, with the ability to understand complex environments quickly. * Comfortable operating in ambiguous or fast-changing environments while maintaining architectural clarity. * Collaborative, empathetic, and committed to building trust with stakeholders at all levels. * Dedicated to continuous learning, technical curiosity, and staying current with emerging technologies. * Pragmatic and outcome-focused, balancing long-term architectural quality with short-term delivery constraints. ________________________________________ Technical Environment The assignment covers a diverse mix of modern cloud-native services and legacy enterprise platforms. Exposure to some of the following areas would be beneficial: * Modern languages and frameworks including Ruby, Java, and Python * AWS cloud services, Infrastructure as Code, platform as a service tooling * Engineering practices such as DDD, TDD, CI/CD, automated testing and Git workflows * Multi-tier platform strategies including centralised data and business logic layers * Enterprise Oracle software including ERP components * Mac-based development environments and public GitHub repositories ________________________________________ Our Values We are committed to a culture built on purpose, transparency, collaboration, and respect. We welcome applicants from all backgrounds and support an inclusive environment where people can thrive. ________________________________________ ACTIVE SC CLEARANCE REQUIRED Due to the nature and urgency of this post, candidates holding or who have held high level security clearance in the past are most welcome to apply. Please note successful applicants will be required to be security cleared prior to appointment which can take a minimum 10 weeks. LA International is an award-winning partner of choice for many of the world's most influential companies and government organisations. Holding Enhanced Government Security Accreditation, we are recognised as the European market leader in the delivery of Security Cleared talent to organisations that demand the very highest levels of security, compliance and assurance. An award-winning organisation, having secured the prestigious Queens Award for Enterprise: International Trade over multiple years. We are committed to fostering an inclusive, equitable and accessible workplace where everyone feels valued and supported. We welcome applications from all individuals, regardless of background or identity, and we encourage candidates who may not meet every listed requirement to still apply. If you require any adjustments or support during the recruitment process, please let us know and we will work with you to ensure a fair and accessible experience. Please Note: If a high volume of applications is received, only candidates shortlisted will be contacted.
Permanent

Job Vacancy
Développeur Senior Back/Fullstack Java — Angular / React

CONCRETIO SERVICES
Published on
AI
AI Agent
Angular

48k-53k €
Lyon, Auvergne-Rhône-Alpes
Développeur senior Java/Spring Boot (5 ans+) recruté en CDI, solide sur les microservices, les APIs REST et les tests automatisés, avec développement en environnement cloud (idéalement AWS) et une maîtrise frontend Angular ou React. Critère différenciant : bonne connaissance des enjeux et outils IA. MISSIONS PRINCIPALES Développement Backend Java Développer des microservices production-ready avec Java 17+ / Spring Boot (Spring Security, Spring Data, gestion des transactions, optimisation des performances) Concevoir et documenter des APIs REST (OpenAPI/Swagger), gérer le versionning et les erreurs Opérer des patterns event-driven via Kafka ou RabbitMQ en production Développement Frontend Contribuer au développement de composants complexes en Angular 17+ ou React (TypeScript, RxJS ou Hooks) Utiliser les patterns de state management (NgRx ou Redux) selon le contexte Qualité, Tests & DevOps Écrire des tests automatisés (JUnit 5, Mockito, TestContainers) avec une vraie pyramide de tests — pas du test en fin de sprint Maintenir et améliorer les pipelines CI/CD (GitLab CI, GitHub Actions ou Jenkins), gérer les images Docker Participer activement à la réduction de la dette technique et aux revues de code IA Appliquée au Développement Utiliser au quotidien les outils IA (GitHub Copilot, Cursor ou équivalents) pour la génération de code, les tests, la documentation et le debugging Partager les bonnes pratiques d'utilisation IA au sein de l'équipe et contribuer à l'évangélisation de ces outils Mentorat & Contribution Architecturale Accompagner les développeurs moins expérimentés (code review, pair programming, tech talks) Participer aux choix architecturaux avec le Tech Lead et contribuer aux décisions techniques sur les projets
Contractor
Permanent

Job Vacancy
Data engineer

MSI Experts
Published on
Apache Spark
Databricks
Java

6 months
40k-48k €
400-450 €
Lyon, Auvergne-Rhône-Alpes
Dans le cadre de la modernisation de son système de gestion des données, notre client recherche un(e) Data Engineer afin de participer à la transformation et à l’industrialisation de ses traitements data. Vous intégrerez une équipe technique engagée sur des projets stratégiques liés à la migration d’applications historiques vers des technologies Big Data et Cloud plus performantes et évolutives. Vos missions Participer à la migration de traitements décisionnels développés sous Informatica et PL/SQL vers des solutions Big Data basées sur Spark (Java). Assurer la maintenance corrective et évolutive des traitements existants afin de garantir leur stabilité et leur performance. Concevoir, développer et optimiser des pipelines de données dans un environnement Cloud moderne autour de Databricks. Industrialiser les traitements data afin d’améliorer leur fiabilité, leur automatisation et leur exploitabilité. Développer et maintenir des flux de données performants répondant aux besoins métiers et techniques. Collaborer avec les différentes équipes projets pour comprendre les besoins fonctionnels et proposer des solutions adaptées. Participer aux phases de tests, de validation et de mise en production des traitements. Contribuer à l’amélioration continue des pratiques de développement et d’exploitation des plateformes data. Veiller à la qualité, à la cohérence et à la disponibilité des données au sein des environnements de production.
Permanent

Job Vacancy
Senior Solutions Architect

Nexus Jobs Limited
Published on

£70k-100k
Holborn, England, United Kingdom
Senior Solutions Architect Our Client is an international consultancy with over 3000 employees. They are now looking to recruit a Senior Solutions Architect to be based at the Company's Central London Offices. You will extensive and deep Expertise in following Application Development areas: " Expertise in application architecture using modern technologies such as cloud native development, 12 factor Apps, microservices, serverless, API management, Kafka, etc. " Deep knowledge of Microservices, Containers, REST APIs development, API Management tools (e.g. MuleSoft, Apigee), Kafka " Solution architect with broad expertise in wide range of digital technologies in areas of application platform development, web and mobile development, cloud, integration, security, etc. " Application dev experience with at least one of the cloud providers - Amazon AWS or MS Azure " Understanding of distributed computing paradigm and exposure to building highly scalable systems. " Experience with platform modernization and cloud migration projects " Expertise in Agile development methodologies like TDD, BDD, Performance/Load testing etc. " DevOps experience - CI/CD, Test Automation, Containerization - tools and processes " Should be conversant with emerging technologies - chatbots, voice/conversational interfaces, RPA, Machine Learning, etc. " In-depth, hands-on experience in developing web /mobile applications or platform with either Java/J2EE or .NET tech stack and database technologies such as Oracle, MySQL, etc. " Exposure to polyglot programming languages like Scala, Python and Golang will be a plus " Ability to read/write code and expertise with various design patterns " Have used NoSQL database such as MongoDB, Cassandra, etc. " Work on opportunities along with sales, practice, delivery teams through the pre-sales process " Develop customer proposals - solution architecture, pitch decks, estimating solution effort, resourcing and timelines " Translate requirements into solution architecture diagrams, implementation roadmap, delivery approach and other artifacts " Understand business & technology issues /challenges and translate that to modern technology solutions " Engage with business and IT groups to align solution architecture with strategic business direction " Build a trusted advisor relationship with business and technology leaders Stay periodically engaged throughout the entire project lifecycle to ensure ongoing alignment to established solution vision " Bachelors or master's degree in engineering (computer, electronics, etc.) " 20+ years of Solutions Architecture experience (or equivalent enterprise architecture experience) and in customer-facing roles " Vertical domain knowledge in Financial Services will be an advantage " Excellent written and verbal communication skills " Experience in client-driven large-scale application platform implementation projects " Experience and desire to work in a global delivery environment Ability to travel up to 40% " Familiarity with architecture modeling tools. TOGAF experience / certification desired but not necessary " Proven track record of designing / developing scalable solutions at the enterprise level " Demonstrated success in quickly understanding business needs and aligning it to technology solutions " Experience delivering solutions using an Agile / Scrum methodology Strong communications skills (e.g. active listening, requirements elicitation, oral, written, presentation, workshop facilitation, consensus building) The Clients offices as based in Holborn - Central London. The salary for this position will be based on expertise and will be in the range £70K - £100K. Please do send your CV to us in Word format along with you salary and availability.
Contractor

Contractor job
257797/Développeur mobile Android KMP sénior - Montpellier

WorldWide People
Published on
Android

6 months
340-370 €
Montpellier, Occitania
Développeur mobile Android KMP sénior - Montpellier Participation au développement, affinages, dans une squad Ma Banque Goals and deliverables Tâches : Développement, tests unitaires Contexte Participation au développement, affinages, dans une squad Ma Banque Attendu : Participation active au projet, mise en place des bonnes pratiques, participer à la création d'un produit en Agile Compétences : Notre stack technique : - Maitrise KMP - Une expérience significative sur le développement d’application grand public Android NATIF - Maitrisant l’architecture MVVM + clean architecture + architecture modulaire - Maitrisant Kotlin (couroutines et flows) - Maitrise de Compose Android - CI/CD (jenkins, fastlane, gitlab CI) Capacité travailler en équipe Bon relationnel pour intégration dans une équipe multi métier Expérience dans un environnement agile Avoir déjà eu une expérience professionnelle en KMP et pouvoir comprendre rapidement notre architecture. Connaissance environnement projet iOS dans un contexte KMP Localisation Montpellier 3 jours de présence sur site client à Montpellier et 2 jours de télétravail par semaine. Expected skills Skills Skill level Jetpack Compose Expert Android Jetpack Expert KOTLIN Expert

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!
756 results

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Hybrid Remote On-site

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£150 £1300 and more

Salary minimum

£20k £250k

Experience

0-2 years experience 3 to 5 years experience 6 to 10 years experience +10 years experience

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