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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Software Engineer - AI project

F FIVE
Published on
Javascript
Node.js
PostgreSQL

1 year
US$400-550
United Kingdom
💻 Software Engineer - $180,000 - $250,000/year Remote | Full-time | TypeScript | React | Node.js | PostgreSQL We're looking for an early-career Software Engineer to join a fast-growing team building AI-powered recruitment technology. In this role, you'll help develop and improve products that automate candidate sourcing, screening, and hiring workflows. You'll work across the full stack, collaborate with experienced engineers, and contribute to building scalable solutions used by companies worldwide. This is an excellent opportunity for someone with strong fundamentals in software development who wants to gain hands-on experience working with modern technologies, cloud infrastructure, and AI-driven products. PST timezone overlap required (at least 6-8 hours). Responsibilities Contribute to the design and development of fullstack systems powering core product workflows Build backend services and APIs with guidance, focusing on clean, maintainable code Develop user-facing features and interfaces that ship directly to real users Support data modeling efforts and learn best practices for database performance and scalability Collaborate with product and design teams to turn ideas into working features Participate in code reviews, testing, and continuous improvement of engineering quality Help debug issues and learn how to maintain reliable production systems Requirements Early-career Software Engineer in Computer Science, Computer Engineering, or a related field Solid fundamentals in JavaScript/TypeScript Familiarity with frontend frameworks like React Familiarity with backend development (Node.js) Exposure to databases (PostgreSQL or similar) and general data modeling concepts Understanding of how APIs work and how applications communicate Curiosity, strong willingness to learn, and attention to detail Nice to Have (Not Required) Internship experience in software engineering. Exposure to cloud platforms (AWS, GCP, or Azure). Familiarity with Git, CI/CD basics, or deployment workflows. Interest in AI, data-driven products, or modern system design. Experience working on team projects or hackathons. How to Apply Apply for this position with your CV If your profile is selected, you'll be invited to complete a short AI-powered interview (20–30 minutes, fully asynchronous), featuring questions based on your experience, projects, and CV. Candidates who successfully pass the screening process will be contacted regarding the next steps.
Permanent

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Tech Lead / DevOps (H/F)

Link Consulting
Published on
Angular
API REST
CI/CD

45k-50k €
Toulouse, Occitania
Notre client, acteur reconnu de la transformation numérique des collectivités territoriales, développe une nouvelle suite logicielle dédiée à la gestion des politiques sociales des départements. Dans le cadre de ce projet stratégique et du développement de ses activités, il recherche son futur Responsable Technique – Projet Suite Logicielle Sociale (H/F) pour son site d'Aurillac (15) ou Toulouse ( 31). Au sein d'une équipe dynamique et expérimentée, vous participez, en soutien du Responsable d'Unité, au développement, à la maintenance et à l'évolution des applications de la suite sociale départementale. Vous contribuez activement à la conception, à la fiabilité et à l'évolution de cette solution stratégique destinée aux collectivités territoriales. ## Vos missions * Assurer le développement et la maintenance des applications ; * Intervenir en tant que référent technique sur les volets Back-End et Front-End ; * Participer aux choix d'architecture et à la définition des bonnes pratiques de développement ; * Garantir la qualité du code, des tests, des livrables et le respect des exigences de sécurité ; * Administrer les environnements techniques et contribuer à l'industrialisation des processus CI/CD ; * Diagnostiquer et corriger les incidents techniques ; * Assurer un support technique auprès des utilisateurs ; * Rédiger les documentations techniques et les guides utilisateurs ; * Présenter les orientations techniques et participer aux réunions de pilotage ; * Accompagner les équipes techniques et métiers dans l'évolution de la solution ; * Réaliser des Proof of Concept (POC) et assurer une veille technologique permanente ; * Participer ponctuellement à des déplacements en collectivités pour des missions d'installation, d'accompagnement ou d'assistance technique. ## Compétences techniques attendues * Bonne maîtrise de Java et Angular * Expérience significative en développement d'applications web modernes * Bonne connaissance des API REST, de la sécurité applicative, des bases de données et de l'architecture logicielle * Maîtrise des mécanismes d'authentification et de gestion des accès (Keycloak, LDAP, SSO) * Connaissance des environnements de conteneurisation et d'orchestration (Docker, Docker Swarm ou équivalent) * Bonne maîtrise des environnements Linux et des outils CI/CD * Connaissances en Business Intelligence et des outils ETL (Extract Transform Load) appréciées * Capacité à présenter un projet, animer des réunions et collaborer avec des interlocuteurs variés * Connaissance des méthodologies Agile appréciée
Permanent

Job Vacancy
Solutions Architect

Nexus Jobs Limited
Published on

City of London, England, United Kingdom
Solutions Architect Our Client is an international consultancy with over 3000 employees. They are now looking to recruit a Senior Solutions Architect to 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 modelling 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 £90K - £120K. Please do send your CV to us in Word format along with you salary and availability.
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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
Site Reliability Engineer with Python

Nexus Jobs Limited
Published on

£80k-100k
London, England, United Kingdom
Site Reliability Engineer with Python Our Client looking to bring on a site reliability engineer to help deploy, manage, troubleshoot, and enhance our complex cloud-based set of internal tools and externally managed services for a variety of users across our wide-ranging organization. You will have at least 7 to 10 years hands-on expertise working as a Site Reliability Engineer. You will work closely with IT, product, and engineering to extend and maintain this set of tools and services and to help debug and resolve problems. In addition, the ideal candidate will proactively look for system weaknesses and find ways to resolve them before they can cause production issues via monitoring and data we aggregate through various tools within our organization's IT & DevOps toolkit. Responsibilities ●Keep our suite of internal apps and services up and running or getting it back up and running quickly if a failure were to occur ●Be the technical point person of operational responsibility for two core platforms (one mobile and one web application) i.e. engaging as appropriate upon escalations from the IT support group whether it be problem solving, addressing production issues, enhancing features etc. - collaborating with engineers and others as needed ●Work closely with internal partners and teams as well as external vendors to ensure that we ship software that meets our code quality, security and performance requirements ●Write, update, and use our documentation, including runbooks and/or playbooks ●Help automate existing or build new internal workflows including ongoing infrastructure needs, testing, failover mitigations, and more ●Debug complex problems across our entire web and mobile application stack and advise key stakeholders on solutions, as well as implement said solutions if appropriate. ●Further our internal CI/CD processes to improve release cadence and developer experience ●Participate in the daily / weekly software development process (standups, sprint planning, retros, issue tracking, etc.) ●Actively lead any critical issue post-mortem processes, including coordination of any meetings and further steps to take Qualifications ●7+ years experience with software engineering, software development, and/or system operations ●Experience debugging complex problems and implementing timely cost-effective solutions ●Experience designing, building, and operating large-scale production systems ●Deep knowledge of Python is preferred, though other languages like Java, Go, Rust, or similar will also be heavily considered ●Experience using source control (Git, GitHub) and feature branching strategies ●Experience with a variety of open-source databases (MySQL, Postgres, Redis, etc.) ●Experience with DevOps engineering and working with container orchestration, such as with Docker or Kubernetes ●Experience with log monitoring and observability via platforms like Sumologic or Cloudwatch ●Experience automating infrastructure, testing, and deployments using tools like CircleCI Configuration management tooling and infrastructure as code knowledge is preferred but not required ●Experience working with AWS services, with knowledge of Azure / Google ecosystems helpful but not required ●Strong familiarity with general modern web and mobile application development, including hands-on experience working with JavaScript (Typescript preferred) and Python stacks ●Cross functional team collaboration experience, especially working with engineers and user experience / product designers, as well as external stakeholders ●Strong skills for weighing and managing scope, risk, quality and timelines ●Strong focus on quality, security, performance, and end user experience This is an exciting position with an exciting organisation based in Central London and New York. The position can be London or New York based. The salary for this position will be circa £80K - £100K. Do send your CV to us in Word format along with your salary and notice period.
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

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!
760 results

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Hybrid Remote On-site

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£150 £1300 and more

Salary minimum

£20k £250k

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

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