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Ce qu’il faut savoir sur TypeScript

TypeScript est un langage de programmation open-source développé par Microsoft, qui étend JavaScript en y ajoutant un système de typage statique. Compatible avec tous les navigateurs et plateformes, TypeScript permet aux développeurs de détecter les erreurs à l'écriture grâce à des types explicites, améliorant ainsi la fiabilité et la maintenabilité du code. TypeScript compile en JavaScript standard, ce qui le rend utilisable dans n'importe quel environnement prenant en charge JavaScript. Il est particulièrement adapté aux projets complexes grâce à ses fonctionnalités avancées, comme les interfaces, les génériques et la prise en charge des modules modernes. De plus en plus populaire, TypeScript est largement utilisé avec des frameworks comme Angular et React, offrant une expérience de développement plus structurée et robuste, tout en s'intégrant parfaitement aux outils et bibliothèques JavaScript existants.

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Freelance

Mission freelanceDéveloppeur Full Stack Senior React / Python – Data & IA (H/F)

HOXTON PARTNERS
Publiée le
Agent IA
Google Cloud Platform (GCP)
Python

12 mois
500-520 €
Paris, France
Dans le cadre d'un programme de transformation Data & IA à dimension internationale, nous recherchons un Développeur Full Stack Senior disposant d'au moins 8 années d'expérience pour concevoir et développer des applications web modernes intégrant des fonctionnalités avancées de data visualisation, d'analytics et d'intelligence artificielle. Le consultant interviendra sur un rôle très orienté développement, avec une forte autonomie et une responsabilité end-to-end sur les applications réalisées, depuis le développement backend en Python jusqu'à la conception d'interfaces frontend avancées en React. Les principales missions seront les suivantes : Développer des applications web full stack responsives et data-intensive. Concevoir des interfaces frontend modernes et performantes en React / TypeScript. Porter une attention particulière à l'UX/UI et à la qualité des interfaces développées. Développer et maintenir des services backend et des APIs principalement en Python. Intégrer des données et développer des connecteurs avec BigQuery. Concevoir des visualisations de données personnalisées et des dashboards interactifs. Intégrer des fonctionnalités d'intelligence artificielle et des agents LLM directement dans les applications. Mettre en œuvre des fonctionnalités conversationnelles, de streaming et de tool-calling. Intégrer des solutions de Business Intelligence embarquées, notamment Looker. Déployer et maintenir les applications dans un environnement Google Cloud Platform. Participer à la mise en œuvre des mécanismes de sécurité : SSO, OAuth, IAM et Row Level Security. Garantir la qualité du code livré à travers les bonnes pratiques de développement, Git, CI/CD, clean code et principes DRY. Utiliser les outils de développement assistés par IA de manière responsable, avec une compréhension et une maîtrise complète du code produit.
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Freelance
CDI

Offre d'emploiTECH LEAD PYTHON / ANGULAR Sur BORDEAUX

EterniTech
Publiée le
Angular
API REST
Python

3 mois
Bordeaux, Nouvelle-Aquitaine
CONTEXTEDans le cadre du renforcement de l'équipe technique, nous recherchons un Tech Lead Full Stack Python / Angular pour accompagner la conception, le développement et l'évolution d'applications métiers dans un environnement technique moderne et exigeant. Le consultant interviendra sur les volets architecture, conception, développement et accompagnement technique des équipes. MISSIONSDéfinir et faire évoluer l'architecture technique des applications. Concevoir et développer les applications Back-end en Python et Front-end en Angular. Concevoir et intégrer des API REST et des services. Accompagner et challenger techniquement les développeurs. Réaliser les revues de code et garantir le respect des standards de développement. Veiller à la qualité, performance, sécurité et maintenabilité du code. Identifier les problématiques techniques et proposer des solutions adaptées. Participer aux choix technologiques et à l'amélioration continue de la stack. Accompagner les équipes dans la mise en place des bonnes pratiques Agile, Git, CI/CD et DevOps. Participer aux différentes phases : conception, développement, tests, déploiement et maintenance. Assurer une veille technologique sur les écosystèmes Python et Angular. ENVIRONNEMENT TECHNIQUEBack-endPython FastAPI / Django API REST Microservices Front-endAngular TypeScript JavaScript HTML / CSS DevOps / InfrastructureGit / GitLab CI/CD Docker Kubernetes Linux Cloud
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CDD

Offre d'emploiAI Engineer

LA International Computer Consultants Ltd
Publiée le

7 mois
SW1A 2AH, City of Westminster, England, United Kingdom
Job title: AI Engineer Contract: 12 months Location: London (hybrid) The Role We are seeking a highly skilled AI Engineer with hands-on experience in building AI-powered software solutions using GitHub Copilot, Claude Code, and modern Large Language Models (LLMs). The ideal candidate will leverage AI-assisted development tools to accelerate software delivery, automate engineering workflows, and build intelligent applications utilizing agentic AI frameworks, code generation, and enterprise AI platforms. The candidate should possess strong software engineering fundamentals along with expertise in integrating AI models into real-world applications and driving developer productivity through AI-assisted coding solutions. Your responsibilities: * Design, develop, and deploy AI-powered applications using LLMs and Generative AI technologies. * Build engineering solutions leveraging GitHub Copilot, Claude Code, OpenAI, Azure OpenAI, Anthropic Claude, and related AI platforms. * Develop AI agents, copilots, and workflow automation solutions for enterprise use cases. * Create retrieval-augmented generation (RAG) solutions using vector databases and knowledge repositories. * Design and implement prompt engineering frameworks and evaluation mechanisms. * Integrate AI services with enterprise applications using APIs, microservices, and cloud-native architectures. * Build automated coding assistants, developer productivity tools, and intelligent software engineering workflows. * Collaborate with business and technical stakeholders to identify AI-driven opportunities and translate them into scalable solutions. * Establish best practices for AI governance, security, model monitoring, and responsible AI implementation. * Mentor development teams on effective usage of AI-assisted development tools. Your Profile Essential skills/knowledge/experience: AI & Generative AI * Strong experience with Large Language Models (LLMs) and Generative AI. * Hands-on experience with: o GitHub Copilot o Claude Code o OpenAI GPT Models o Azure OpenAI Services o Anthropic Claude APIs * Prompt Engineering and Prompt Optimization. * Agentic AI frameworks such as: o LangChain o LangGraph o CrewAI o AutoGen o Semantic Kernel Software Development * Strong programming expertise in: o Python o JavaScript/TypeScript o C# or Java * Experience building RESTful APIs and microservices. * Knowledge of software design patterns and scalable application architecture. AI Application Development * Retrieval-Augmented Generation (RAG) * Vector databases: o Pinecone o ChromaDB o Weaviate o Azure AI Search * Embedding models and semantic search. * Model evaluation and observability. Desirable skills/knowledge/experience: * Azure, AWS, or Google Cloud Platform. * CI/CD pipelines using GitHub Actions, Azure DevOps, or Jenkins. * Docker and Kubernetes. * Infrastructure as Code (Terraform preferred). 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. A multiple award-winning organisation, having secured the prestigious Queens Award for Enterprise: International Trade over consecutive 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.
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CDI

Offre d'emploiJunior Software Engineer

Bluetown
Publiée le

£28k-35k
Birmingham, Royaume-Uni
Job Title: Junior Software Engineer Location: Birmingham / Hybrid Salary: £28,000 - £35,000 per annum Position: Permanent, full-time About The Company: The Company is a long-established web and app development agency based in the Jewellery Quarter, specialising in AI integration, SaaS products, apps and portals. We build high-quality web and mobile solutions for a wide range of clients, from innovative start-ups to established enterprises. We embrace modern technologies, and have frontier adoption of AI. We take pride in a team culture that values high control, continuous learning, and delivering work we can stand behind. All roles are 'hybrid', meaning we expect our teams to be able to come into the office in the Jewellery Quarter in Birmingham while working effectively from home. Job Role: We are looking for a Junior Software Engineer with a strong software portfolio who wants to build web and mobile applications and develop their engineering skills. You will work across the front end, back end and database on real client projects from early on. An Engineer or Lead Engineer will review your work closely and help you build software that is tested, documented and ready to run in production. You will follow the agreed architecture and check your approach before starting work. As you demonstrate stronger skills and judgement, you will take on larger tasks with less supervision. This role has no people-management responsibilities. Your responsibilities will include: Building features within the agreed technical approach and checking that your changes work before submitting them for review. Asking for guidance early when you are unsure, bringing your findings and possible approaches to the discussion. Raising problems promptly, explaining what is affected and either resolving them or making clear who needs to help. Applying code-review feedback and understanding the reasoning behind it. Learning our technologies, tools, delivery practices and clients' businesses, including unfamiliar technologies when projects require them. Keeping your lead and project manager informed about completed work, progress, blockers and support you need. Keeping ticket statuses, estimates, time records and pull requests accurate and up to date. Writing clear tickets, commit messages and pull request descriptions that explain what changed and why. Recording technical decisions, setup instructions and operational details so others can pick up your work. Explaining trade-offs and areas of uncertainty when handing work over for review. Working with designers, project managers and other engineers, and helping colleagues where you can. Taking part in scrums, masterclasses and retrospectives, applying what you learn and making practical improvements such as clearer notes, checklists or tests. Your success will depend on the quality and reliability of your work, clear communication and how well you apply what you learn. We expect working, tested features, early reporting of problems and clear handovers. Skills and experience: A strong software portfolio showing substantial project work and your ability to build features or complete projects from start to finish. Commercial programming experience is advantageous. Solid capability with an object-oriented back-end language, preferably PHP/Laravel, and a modern front-end framework such as React or React Native. TypeScript is desirable. Good working knowledge of SQL and relational database design, with an understanding of MVC and RESTful API principles. Familiarity with Git-based team workflows, code review, automated testing and CI/CD. Care for clean, well-structured code and the judgement to recognise when a problem needs a second opinion. Clear written and verbal communication with technical and non-technical colleagues. The ability to take responsibility for agreed tasks, work within guidance and ask for support when needed. A curious, practical approach to new tools and AI-assisted development, with a willingness to experiment and assess their value through evidence and measurable results. Additional Information: We value a diverse workforce and believe that people from different backgrounds can bring fresh ideas, thinking and approaches to the way we work. We welcome everyone from everywhere to come and join our team. Applicants must have the right to work in the UK. We are unable to offer visa sponsorship for this role. The job title and salary offered will be dependent on the candidate's experience and demonstrated capability. Please click APPLY to submit your CV and Cover Letter for this role. Candidates with experience of the following may also be suitable to apply for this role; Software Engineer, Software Developer, Full Stack Developer, Web Developer, App Developer, Frontend Developer, Backend Developer, Junior Software Engineer, Junior Developer, Graduate Developer, Trainee Developer, SaaS Developer, Portal Developer, Mobile App Developer, AI-Assisted Development, AI Pair Programming, Agentic Coding, AI Coding Agents, Cursor, Claude Code, GitHub Copilot, OpenAI Codex, ChatGPT
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Freelance

Mission freelanceTech lead / Architecte IA Agentique

STHREE SAS
Publiée le

18 mois
Levallois-Perret, Île-de-France
Compétences attendues : Domaine d'expertise Compétences clés Expertise IA & agentique Architectures LLM, IA générative, agents mono-agent et multi-agents, orchestration de workflows agentiques, RAG, mémoire conversationnelle et gestion du contexte. Protocoles & gouvernance IA MCP, A2A, écosystèmes agentiques, évaluation, monitoring, traçabilité et contrôle des agents IA. Développement & integration Expertise Python, TypeScript apprécié, APIs, microservices, connecteurs, intégration SI complexe, CI/CD et pratiques DevOps. Architecture & cloud Architecture applicative, urbanisation SI, Azure/AWS/GCP, Kubernetes/OpenShift, sécurité des plateformes IA, observabilité et exploitation. Leadership technique Animation d'équipes techniques, coaching de développeurs, définition de standards, construction d'une vision cible et capacité à la faire adopter. Livrables attendus : * Architectures de référence et dossiers d'architecture. * Frameworks, patterns et composants réutilisables. * Standards de développement, de test et de gouvernance IA. * Patterns d'intégration avec le système d'information. * Cas d'usage industrialisables et trajectoire de passage à l'échelle. * Guides d'architecture et recommandations techniques. * Dossiers de décision technologique (ADR). * Méthodologies de développement et d'exploitation des agents IA. * Supports de démonstration et accompagnement des parties prenantes. Qualités recherchées : * Leadership technique reconnu et capacité à challenger les choix d'architecture. * Vision stratégique des plateformes IA et capacité à la décliner en standards opérationnels. * Forte capacité d'innovation, de vulgarisation et de pédagogie. * Culture d'industrialisation, de qualité logicielle, de sécurité et d'exploitation. * Excellente communication avec les équipes métiers, techniques, architecture, sécurité et direction. * Capacité à fédérer un écosystème d'acteurs autour d'une vision technique commune. Niveau d'expérience attendu : * Plus de 10 ans d'expérience en ingénierie logicielle, architecture ou plateformes techniques complexes. * Expérience concrète sur des plateformes IA générative ou des projets agentiques à l'échelle. * Expérience d'accompagnement d'équipes de développement et de transformation technologique.
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CDI

Offre d'emploiSoftware Engineer

Bluetown
Publiée le

£32k-45k
Birmingham, Royaume-Uni
Job Title: Software Engineer Location: Birmingham / Hybrid Salary: £32,000 - £45,000 per annum Position: Permanent, full-time About The Company: The Company is a long-established web and app development agency based in the Jewellery Quarter, specialising in AI integration, SaaS products, apps and portals. Job Role: This is a hands-on, mid-level Software Engineer role with responsibility for delivering complete features and projects. You will work independently with light oversight from a Lead Engineer, delivering projects with a moderate level of technical risk or substantial parts of larger projects. You will own your work from the initial ticket through to a working, supportable feature in production. You will make technical decisions within your area of responsibility and judge when to seek a second opinion. You will raise higher-risk and architecture-level decisions with your lead early, bringing options and a recommendation. Your lead will support you with project-level technical risk. The role has no people-management responsibilities. You are encouraged to support junior engineers informally, while remaining focused on the quality, reliability and clarity of your own work. Your responsibilities Deliver features that are working, tested, documented and in use. Check for defects or unexpected behaviour after delivery and follow through without needing reminders. Make technical decisions that balance maintainability, security, performance and the client's needs. Understand which decisions you can make, which need your lead's input and which require further escalation. Identify risks and trade-offs early. Explain the current position, the impact on the project, what is already handled and what remains unresolved. Bring a proposed course of action so your lead can confirm, adjust or step in, and raise problems while there is still time to act. Build full-stack web and mobile applications, typically involving React Native, SQL-backed APIs and AWS hosting. Be comfortable working in the framework or language each project requires. Write clean, tested, well-structured code that follows team standards. Work collaboratively through Git, pull requests and CI/CD pipelines. Use AI-assisted tools to improve speed and quality. Review and validate their output, taking responsibility for the software you deliver. Keep your lead and project manager informed about progress, implications, resolved and outstanding issues, and any support or decisions you need. Explain technical choices clearly to project managers and, where needed, clients. Document decisions, context and operational knowledge so another engineer can pick up your work without relying on your memory. Identify recurring problems and suggest changes that prevent them. Put practical improvements in place within your area, such as checklists, clearer standards, tests, automation or better ticket templates. Contribute to better tickets, estimates, refinement and delivery flow. Apply lessons from retrospectives to your work. Keep clear ownership, a dated next step, any required decision or escalation, and a backup plan for the work you own. Resolve issues affecting your delivery or make clear who needs to take responsibility. Explain the trade-offs you chose as well as the constraints you faced when reporting on your work. Experience and capabilities You will need: Commercial programming experience consistent with a mid-level engineer, with evidence of delivering features or parts of projects from start to finish. Solid capability in an object-oriented back-end language, with PHP/Laravel strongly preferred, and a modern front-end framework such as React or React Native. TypeScript is desirable. Good working knowledge of SQL and relational database design, and an understanding of MVC and RESTful API principles. Familiarity with Git-based team workflows, code review, automated testing and CI/CD. The ability to solve complex problems and become effective quickly with unfamiliar technologies. Clear written and verbal communication with technical and non-technical colleagues. Evidence of working independently, making informed decisions within your responsibilities, and knowing when and how to seek support. A practical, curious approach to new tools and AI-assisted development, with a willingness to experiment and assess their value through evidence and measurable results. Additional Information: We value a diverse workforce and believe that people from different backgrounds can bring fresh ideas, thinking and approaches to the way we work. We welcome everyone from everywhere to come and join our team. Applicants must have the right to work in the UK. We are unable to offer visa sponsorship for this role. The job title and salary offered will be dependent on the candidate's experience and demonstrated capability. Please click APPLY to submit your CV and Cover Letter for this role. Candidates with experience of the following may also be suitable to apply for this role; Software Engineer, Software Developer, Full Stack Developer, Web Developer, App Developer, Frontend Developer, Backend Developer, Junior Software Engineer, Junior Developer, Graduate Developer, Trainee Developer, SaaS Developer, Portal Developer, Mobile App Developer, AI-Assisted Development, AI Pair Programming, Agentic Coding, AI Coding Agents, Cursor, Claude Code, GitHub Copilot, OpenAI Codex, ChatGPT
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Les métiers et les missions en freelance pour TypeScript

Développeur·euse front-end (JavaScript, Node, React, Angular, Vue...)

Le/ La Développeur·euse front-end (JavaScript, Node, React, Angular, Vue...) utilise TypeScript pour développer des applications web robustes et évolutives, en ajoutant une couche de typage statique au JavaScript pour améliorer la qualité du code.

Développeur·euse fullstack

Le/ La Développeur·euse fullstack utilise TypeScript pour travailler sur le développement d'applications web côté serveur (back-end) et côté client (front-end), garantissant la cohérence du code et une meilleure gestion des erreurs.

Développeur·euse mobile Android

Le/ La Développeur·euse mobile (Android, iOS) utilise TypeScript en combinaison avec des frameworks comme React Native pour développer des applications mobiles cross-platform tout en bénéficiant des avantages du typage statique.

Développeur·euse mobile iOS (Swift, Objective-C...)

Le/ La Développeur·euse mobile (Android, iOS) utilise TypeScript en combinaison avec des frameworks comme React Native pour développer des applications mobiles cross-platform tout en bénéficiant des avantages du typage statique.

Lead developer / Tech lead

Le / La Lead Developer / Tech Lead utilise TypeScript pour superviser le développement d'applications robustes, en veillant à l'architecture du code, à la gestion des erreurs et à l'optimisation des performances dans des projets complexes.

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