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What you need to know about .NET

.NET is a software development framework created by Microsoft, designed to enable the creation of web, mobile, desktop, and cloud applications. Based on a cross-platform architecture, it supports multiple programming languages such as C#, F#, and VB.NET, thus offering great flexibility to developers. With the ASP.NET framework, it facilitates the development of high-performance web applications and APIs, while .NET Core (now merged into .NET 5 and above) enables cross-platform application development, compatible with Windows, macOS, and Linux. .NET includes rich libraries for data management, security, and user interfaces, as well as a high-performance runtime engine called Common Language Runtime (CLR). Thanks to its vast ecosystem and tools like Visual Studio and NuGet, .NET is widely used to create robust and scalable solutions, adapted to the diverse needs of modern businesses.

Your search returns 250 results.
Permanent

Job VacancySenior Software Engineer with C# .net Fixed Income FX

Nexus Jobs Limited
Published on

£50k-75k
City of London, England, United Kingdom
C# .NET Software Developer with FX and Fixed Income Our Client is a niche boutique broker specialising in FX. They are looking to recruit a C# .NET Software Developer with at least 3 to 5 years proven track record of developing with C# .NET. The Client would like meet candidates ideally with some understanding Trading Floor projects to include Fixed Income, Risk Management, Swap Options and FX. You need to be resilient as you will be working closely with traders and developing financial trading systems so an understanding of FX instruments would be very useful. The Company is a fast growing dynamic brokerage firm, specialising in currency options and interest rate swaps. They are seeking a talented technologist to join the London team. You will be working in a fast paced, delivery focused environment where you will get the opportunity to make a genuine impact on the business rather than just 'making up the numbers'. Initially reporting to the CTO, the successful candidate will become a key member of the global team. There will be a large amount of autonomy in the role, giving the candidate the opportunity to showcase their development talents, Responsibilities :- Re-architecting and building the in-house middle office platform and integrating with a new trading platform. Developing pricing toolsets Integrating to external reporting/tradeflow and pricing APIs. Maintaining the company's daily operation on the existing platforms. Essential skills :- Minimum 3 to 5 years experience of Microsoft web technologies ( C#, Core MVC ) Relational database experience (SQL Server) Proactively able to build relationships with stakeholders:- sales, brokers, middle office, external vendors. Ability to produce clean, well-written, fully tested production ready software. Desirable skills :- Knowledge of the FIX protocol Knowledge of FX trade processing Basic knowledge of Foreign exchange products (vanilla/exotic options, fx cash) ( training will be given) Qualifications: Computer Science related degree preferred At least 3 years experience in a comparable development role. The Client is based in the City of London. The salary for this role will be £50K - £75K. Please do send your CV to us in Word format along with your salary and availability.
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Permanent

Job VacancyDéveloppeur senior C# / .NET – ASP.NET Core (H/F)

HOXTON PARTNERS
Published on
.NET
ASP.NET Core
C#

6 months
Lille, Hauts-de-France
Vous disposez d'une expérience confirmée en développement C# / .NET et maîtrisez parfaitement Core. Vous avez déjà participé à des projets de refactoring d'applications existantes, de modernisation de systèmes legacy ou de conception d'architectures modulaires. Vous maîtrisez les principes de découplage, de séparation des responsabilités et les principaux design patterns applicables à ce type de contexte. Vous possédez une solide maîtrise de SQL Server et de MongoDB, ainsi qu'une bonne compréhension des problématiques de performance, d'intégrité des données et de traitement de volumes importants. Une expérience significative dans la conception de traitements batch à grande échelle est attendue, notamment autour du parsing et de la transformation de fichiers XML, du traitement par lots indépendants, de la reprise sur échec, de l'idempotence, de la gestion d'états et de l'exécution parallèle. Vous pratiquez les tests unitaires et les tests d'intégration. Une expérience du Behavior-Driven Development avec SpecFlow, Reqnroll ou Gherkin constituera un véritable atout. Au-delà de votre expertise technique, vous êtes capable d'analyser un système existant, d'en comprendre les dépendances, de documenter son fonctionnement et de proposer des évolutions pragmatiques. Vous êtes également à l'aise pour contribuer aux choix techniques, partager vos bonnes pratiques et participer aux revues de code.
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Permanent

Job VacancyDéveloppeur Full Stack .NET Core / React.JS (H/F)

AVA2I
Published on
.NET
C#
React

1 year
Ile-de-France, France
Contexte de la missionVous intégrerez une équipe de développement en charge d'applications métiers stratégiques destinées aux équipes Back-Office. Vous participerez au développement, à la maintenance évolutive et à l'amélioration continue d'applications intranet, dans un environnement Agile et moderne basé sur les technologies .NET et React. MissionsDéveloppement et conceptionParticiper à l'analyse des besoins fonctionnels avec les équipes métiers. Concevoir, développer et faire évoluer les applications. Développer des composants en C# / .NET Core. Concevoir et développer les interfaces utilisateurs en React.js. Produire un code de qualité en appliquant les bonnes pratiques de développement (Design Patterns, Clean Code). Développer et maintenir les tests automatisés dans une démarche TDD (Test Driven Development). Analyse fonctionnelle et support Recueillir les besoins des utilisateurs. Formaliser les demandes sous forme de User Stories et de Defects. Assurer le support fonctionnel et technique des applications. Participer aux phases de recette et accompagner les mises en production. Amélioration continueContribuer à l'industrialisation des développements. Participer à l'automatisation des processus de packaging et de déploiement dans une démarche de Continuous Delivery. Identifier les axes d'amélioration des applications et proposer des solutions techniques. Participer à la résolution des incidents et à l'amélioration continue des pratiques de développement.
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Contractor

Contractor jobTech Lead .NET (80%) / React (20%)

Espritek
Published on
.NET
ASP.NET Core
Azure

3 years
Ivry-sur-Seine, Ile-de-France
A NOTER : Passage probable à 1 jour TT et 4 jours sur site fin 2026/ début 2027. A NOTER : La tranche de TJM indiqué ne pourra pas aller au dessus du seuil maximum. A NOTER : Mission de 3 ans temps plein. Le client recherche un Tech Lead .NET sénior (10 à 15 ans d'expérience minimum) pour intervenir au sein de sa Digital Factory, dans un contexte d'industrialisation, d'amélioration continue de la qualité et de modernisation des interfaces front. La mission consiste à : Assurer le leadership technique effectif de l'équipe PDP et garantir la cohérence des choix techniques au quotidien Piloter techniquement les sujets de conception, développement, migration, scalabilité, performance et résilience sur un socle .NET Sécuriser les trajectoires techniques liées aux enjeux Move2Cloud et aux contraintes de production à fort trafic Contribuer activement à l'amélioration continue : qualité du code, réduction de dette, refactorings maîtrisés, performance, sécurité et maintenabilité Structurer et renforcer l'observabilité des services via Datadog : logs, métriques, traces, dashboards, alerting et analyse des signaux faibles Participer au cadrage technique des sujets avec le Produit, l'Architecture, le Cloud, la QA et les équipes DevOps S'inscrire dans une dynamique orientée résultat : stabilité, performance, tenue des engagements, qualité d'expérience utilisateur et robustesse long terme
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Permanent

Job VacancyJunior Software Developer (.NET / Power Platform)

Bluetown
Published on

£26,660-32k
HU1 1AA, Hull, England, United Kingdom
Job Title: Junior Software Developer (.NET / Power Platform) Location: Hull, UK (Hybrid / Office) Salary: £26,660 - £32,000 per annum Job type: Full-time, Permanent Reality Solutions is a leading regional IT Solutions Provider and Sage Accredited Business Partner based in Hull. We are looking for an enthusiastic Junior Software Developer to join our development team. This is an exciting opportunity for someone early in their development career who enjoys solving business problems through technology and wants to work across both traditional software development and the Microsoft Power Platform. You will contribute to the development and support of internal and client-facing business systems, helping to deliver innovative solutions using technologies such as .NET, SQL Server, and Microsoft Power Apps. About the Role: This role is ideal for a developer with a solid technical foundation who is eager to learn and grow. You will work alongside experienced developers and consultants, supporting the development of business applications, database solutions, and Power Platform applications. A significant part of the role will involve designing, developing, and enhancing Microsoft Power Apps Canvas Applications to help automate business processes and improve user experiences for our clients and internal teams. You will gain exposure to the full software development lifecycle, from requirements gathering and solution design through to development, testing, deployment, and ongoing support. Key Responsibilities: Develop and maintain applications using VB.NET and C#.NET Design, build, and enhance Microsoft Power Apps Canvas Applications Assist in developing solutions using the wider Microsoft Power Platform, including Power Automate and Dataverse Design, write, and optimise SQL Server queries and stored procedures Implement new features and improve existing functionality across internal and customer systems Debug, test, and resolve software defects Work with stakeholders to understand business requirements and translate them into practical technical solutions Support and improve existing legacy applications while contributing to platform modernisation initiatives Integrate business applications with third-party systems and APIs Produce technical documentation and support handover activities Follow development standards, version control practices, and release procedures Participate in code reviews and team knowledge-sharing activities About you: We are looking for someone who enjoys learning, solving problems, and helping businesses work more efficiently through technology. You may already have commercial development experience or have developed your skills through education, placements, apprenticeships, or personal projects. You should be comfortable working with technology, willing to learn new tools and approaches, and able to communicate effectively with both technical and non-technical colleagues. Most importantly, we're looking for someone with a positive attitude, strong attention to detail, and a genuine interest in developing their career within software development and the Microsoft ecosystem. Required Skills & Experience: Experience with software development using VB.NET and/or C# (commercial, educational, or personal projects considered) Basic understanding of Microsoft SQL Server and relational database concepts Experience writing SQL queries and working with data Understanding of software testing and troubleshooting techniques Familiarity with version control systems such as Git Strong analytical and problem-solving skills Good communication skills and willingness to work collaboratively Desire to learn new technologies and continuously develop technical skills Desirable Skills: Experience creating or supporting Microsoft Power Apps Canvas Applications Exposure to Power Automate and broader Microsoft Power Platform technologies Experience with ASP.NET, .NET Core, or Web APIs Familiarity with Dataverse and Microsoft 365 integrations Exposure to ERP or business management systems such as Sage 200 Experience integrating with REST APIs Knowledge of JavaScript, HTML, or CSS Cloud exposure (Azure preferred) Understanding of DevOps or CI/CD concepts Mobile application development exposure (e.g. Flutter/Dart) What we offer: Opportunity to work with modern Microsoft technologies including Power Platform Hands-on experience across both software development and low-code application development Structured training and mentoring from experienced developers and consultants Varied work across multiple industries and business systems Exposure to the complete software development lifecycle Opportunity to modernise legacy applications and contribute to new product development Supportive and collaborative team environment Clear career progression and development opportunities Healthy work-life balance with hybrid working options Please click the APPLY button to send your CV and covering letter for this role. Candidates with the relevant experience and job titles of; Junior Software Developer, Trainee Developer, Graduate Software Engineer, Software Engineer, Software Development Engineer, Software Developer, Developer, Programmer, C + + Developer, . Net Developer, Software Programming, Software Development, IT Developer, C Developer, JavaScript, Software Development Engineer may also be considered for this role.
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Permanent

Job VacancyDatabase Engineer with SQL Server SSIS, SSRS and C# .net asp.net

Nexus Jobs Limited
Published on

£55k-70k
London, England, United Kingdom
Database Engineer with SQL Server SSIS, SSRS and C# .net asp.net Our Client is a bank based in Central London who are looking to recruit a Database Engineer with the ability to work with SSIS. You must have solid expertise of at least 5 years experience of working with MS SQL Server and SSIS – SSIS is very important for this position. Responsible for the development and delivery of new systems to automate and streamline processes required by different departments. To support the internal IT department with changes and upgrades to software platforms. To be primary contact for all technical questions relating to in-house bespoke systems and interfacing. Database Support Supporting budgeting and financial planning processes for Finance department, including loading and refreshing of data based on requirements. Understand and conduct the front-end functionality to amend and change hierarchical structures within the environment. Debug and analyse errors and anomalies within Hyperion system as raised by Finance and to pinpoint areas of failure and correct any issues. Liaise with Finance on a daily basis to ensure smooth running of the Hyperion environment. Build data flows within the SQL environment in SSIS packages. Risk & Regulatory Duties Maintain knowledge of all applicable regulatory requirements including the Bank's Risk and Compliance policies and procedures and adhere to these to avoid exposing the Bank to undue risk. Report policy/procedure breaches and areas of potential non-compliance and suspicions promptly upon identification in accordance with the Bank's Risk and Compliance policies. Accurately execute all controls within own area to minimise risk of policy, procedure, and/or regulatory breaches. Identify new risks/control gaps within own area and escalate accordingly to your Line Manager and/or Head of Department. Qualifications/Experience Degree level qualified or equivalent. SQL Programming. Knowledge and Skills Software analysis and design. SQL query language with SSIS SSRS and SSAS Data warehouse design concepts, (Inmon or Kimball) Any experience of developing with C# .net and asp.net would be very useful Must have solid experience of working with SSIS and building data warehouses and some knowledge of reporting using SSRS. The Client is a Bank based in the Central London. This is a 12 month FTC position with a salary of circa £55K - £70K. You will be required to be in the office at least 3 days week. Do send your CV to us in Word format along with your salary and availability.
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Permanent

Job VacancyFront and Backend C# Dot Net Javascript Software Developer with Umbraco

Nexus Jobs Limited
Published on

£55k-65k
West Ham, England, United Kingdom
Front and Backend C# Dot Net Javascript Software Developer with Umbraco Our Client is an established leader in the travel industry. They are looking to recruit a Full Stack Dot Net Software Developer to work on a major transformation programme for this award-winning Luxury Travel Company. Projects will include designing and implementing web based tools to automate operational tasks and improve accuracy of pricing and management information and web site enhancements. We are seeking an individual who is looking to take on the technical design and implementation of technical solutions for the business. The Client works with a number of third party suppliers and the candidate will also liaise and work closely with our vendors to help deliver solutions, as required. Depending on your expertise you will have the opportunity to take on the management of projects involving multiple stakeholders and vendors. You will be responsible for: Design and implementation of web based tools to automate a variety of business processes Implementation of enhancements to the company website (built on Umbraco) Interfacing with business systems and data warehouse to implement the required functionality Analysing and identifying ways to automate processes working alongside the business lead Designing and validating the technical suitability of proposed solutions including database design and software approaches proposed by vendors Taking on complex business change projects that involve multiple stakeholders and suppliers Potential for managing suppliers tightly to ensure delivery of our requirements within budget and on time Risk and issue management to ensure a pro-active approach is taken to managing these Skills and Experience: The Client would ideally like to see some experience with specific retail Travel Industry domain knowledge Track record of delivering projects involving in-house resources and/or third party suppliers Ability to design and architect technical solutions to complex business problems Full Stack development experience (ASP.NET, C#, HTML, CSS, JavaScript, JQuery, ReactJS, AngularJS, MS SQL Server) CMS experience e.g. with Umbraco – experience of Umbraco would be a plus Continuous Delivery skills, tools and techniques (e.g. Git, Github, Jenkins, Docker, Vagrant, Chef, Puppet, Selenium, etc.) Familiar with Azure cloud services & setting up/managing resources/deploying apps Experience in implementing business process automation Capable of working with (and developing) multiple (REST) APIs documented with e.g. OpenAPI/swagger PowerBI, PowerQuery, Dax & M Other API messaging formats e.g. JSON, XML, SOAP 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 Ability to understand and document business requirements This is an exciting new role at this organisation – salary range £50K - £65K. The company is based in London. Please send your CV to us in Word format along with your salary and availability.
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Permanent

Job VacancyDéveloppeur·se Full Stack .NET / Angular

CAT-AMANIA
Published on
.NET
.NET CORE
Angular

1 year
39k-44k €
300-370 €
Toulouse, Occitania
Au sein d'une équipe de développement, tu participes à la conception, au développement et à l'évolution d'applications métiers stratégiques dans un environnement technique moderne. Tu interviens sur l'ensemble du cycle de vie des applications, aussi bien sur les développements backend que frontend, en veillant à la qualité, à la performance et à la maintenabilité des solutions. Tes missions principales : Conception & développementParticiper à l'analyse des besoins fonctionnels et techniques Concevoir et développer les fonctionnalités backend en .NET Core / C# Développer les interfaces utilisateurs en Angular Concevoir et maintenir des API REST Participer aux choix d'architecture et aux évolutions techniques des applications Garantir la qualité, la performance et la maintenabilité des développements Qualité logicielleRéaliser les tests unitaires et les tests d'intégration Participer aux revues de code et appliquer les bonnes pratiques de développement Corriger les anomalies et assurer la maintenance évolutive et corrective des applications Veiller au respect des standards de développement et de qualité Collaboration & amélioration continueParticiper aux rituels Agile et collaborer avec les équipes métiers et techniques Contribuer à l'amélioration continue des outils et des pratiques de développement Participer à la documentation technique des applications Accompagner les phases d'intégration, de recette et de mise en production
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Contract roles and jobs for .NET

.Net Developer (C# ...)

The .Net Developer (C#, etc.) uses the .NET framework to develop web applications, desktop applications, and backend services using the C# language and associated .NET tools.

Android Mobile Developer

The Android Mobile Developer, while mainly focused on Android, may use technologies like .NET (such as Xamarin) to develop cross-platform mobile applications.

Fullstack Developer

The Fullstack Developer uses the .NET framework for back-end development and integration with front-end technologies, creating complete web applications.

Microsoft Consultant (Office, SharePoint, 365...)

The Microsoft Consultant (Office, SharePoint, 365, etc.) advises businesses on the integration of Microsoft solutions, including .NET-based solutions, customizing and optimizing applications to meet specific user needs.

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