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Looking for top .Net Core jobs? Discover the latest .Net Core developer opportunities on Haystack, your go-to IT job board. Whether you're an experienced .Net Core engineer or just starting out, find the perfect role that matches your skills and advance your career today. Start applying now to land your dream .Net Core job!

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Lead Full Stack .NET Developer - Azure - Preston

Lead Full Stack C# .NET Developer with experience in back-end C# .NET / .NET Core development, Azure and some front-end JavaScript development (Vue.js / Angular / React, etc) is required by a leading company in Preston. You should also have some development experience in the Cloud with Azure & third-party API integrationsDue to investment and a pipeline of brand-new green field work, they need a Lead Full Stack Developer to join the team. It is a true full-stack development role!! They would also take somebody stronger / has a preference for back-end development if needed. The role will involve several .NET software engineering projects, including taking an old legacy system and building a brand new one over the next 2 years.Key skills:

Experience in leading/mentoring junior and mid-level .NET software developers

Full-stack development experience in both C#.NET and JavaScript (Vue.js / Angular / React etc) with a passion for embracing new front-end technologies.

Azure experience with a good appreciation of Azure Functions, Storage Accounts, Service Bus, Application Insights, and Key Vault

Agile, SQL Server and WebAPI experience

Familiar with modern web technologies such as HTML5, CSS3, and JavaScript.

This is a fantastic chance to join a software engineering team of 6 people, which is growing. You will be involved in full-stack development in an Agile environment with the opportunity to bring in new ways of working and technologies if needed. The new greenfield projects are exciting and fun to work on, and the team is constantly looking to challenge each other from a coding point of view. If you love code but want to engage with a business to help draw up requirements and take ownership of projects, then this job is for you.You will be able to be part of something special. As the Lead, you will be given so much autonomy, and it is a true green field project. Job responsibilities include:* Take the lead on projects, developing new software solutions to help the business move forward. * Be responsible for delivering high-quality solutions to specification and on time * Actively contribute to the continuous improvement process and drive efficiencies within the team ?? * Peer code reviews with more junior-level developers * Uphold good development planning and procedures * Follow industry best practices and coding standards * Optimise application performance and improve user experience through innovative front-end and back-end development techniques * Assisting junior to mid-level developers when requiredMy client is offering a starting salary between £60,000 - £70,000, depending on experience. They also provide a good benefits package, a very relaxed but dynamic working environment and a flexible hybrid working model, with no more than 2 days in the office per week (you are not tied down to the days you are in). To apply, send your CV to matthew.leach @ circlerecruitment.com or press apply now:Keywords: Lead Full Stack C #.NET Developer - JavaScript - Vue.JS - React - Angular JS - MVC - ASP.NET - .NET Core - Azure - Cloud -TDD - Docker - Preston - Blackpool - Blackburn - Bolton - Warrington - Liverpool - Wigan - ManchesterCircle Recruitment is acting as an Employment Agency in relation to this vacancy. Earn yourself a referral bonus if you refer somebody else who fills the role! We also offer an iPad if you refer a new client to us and we recruit for them. Follow us on Facebook - Circle Recruitment , Twitter - @Circle_Rec and LinkedIn - Circle Recruitment.

.NET Developer - Azure - Preston

.NET Developer with experience in both back-end C# .NET / .NET Core development and front-end JavaScript development (Vue.js / Angular / React, etc) is required by a leading company in Preston. You should also have some development experience in the Cloud with Azure & third-party API integrationsThere is some excellent investment in AI technologies, so a chance to work on some cutting-edge software development projects in AI advancement, along with several greenfield projects ready to go.Key skills:

Full-stack development experience in both C#.NET and JavaScript (Vue.js / Angular / React etc) with a passion for embracing new front-end technologies.

Azure experience with a good appreciation of Azure Functions, Storage Accounts, Service Bus, Application Insights, and Key Vault

Agile, SQL Server and WebAPI experience

Familiar with modern web technologies such as HTML5, CSS3, and JavaScript.

This is a fantastic chance to join a software engineering team of 6 people, which is growing. You will be involved in full-stack development in an Agile environment with the opportunity to bring in new ways of working and technologies if needed. The new greenfield projects are exciting and fun to work on, and the team is constantly looking to challenge each other from a coding point of view. If you love code but want to engage with a business to help draw up requirements and take ownership of projects, then this job is for you.Job responsibilities include:* Work on a range of projects, developing new software solutions to help the business keep on progressing. * Be responsible for delivering high-quality solutions to specification and on time * Actively contribute to the continuous improvement process and drive efficiencies within the team ?? * Uphold good development planning and procedures * Follow industry best practices and coding standards * Optimise application performance and improve user experience through innovative front-end and back-end development techniquesMy client is looking to pay a starting salary of between £50,000 - £60,000 + Benefits + Hybrid working (2 days in the office). To apply, send your CV to matthew.leach @ circlerecruitment.com or press apply now:Keywords: Full Stack C #.NET Developer - JavaScript - Vue.JS - React - Angular JS - MVC - ASP.NET - .NET Core - Azure - Cloud -TDD - Docker - Preston - Blackpool - Blackburn - Bolton - Warrington - Liverpool - Wigan - ManchesterCircle Recruitment is acting as an Employment Agency in relation to this vacancy. Earn yourself a referral bonus if you refer somebody else who fills the role! We also offer an iPad if you refer a new client to us and we recruit for them. Follow us on Facebook - Circle Recruitment , Twitter - @Circle_Rec and LinkedIn - Circle Recruitment.

C#.Net Software Developer

Exalto Consulting ltd

C#.Net Software Developer (C#, ASP.NET/.Net Core , SQL Server) This is a hybrid role, with 2 days a week onsite in Crewe or Chester. My client are an innovative software development company delivering mission-critical Azure hosted software in their respected sector. Their collaborative and fast-paced environment utilizes Agile methodologies to deliver cutting-edge solutions for their diverse customer base. They are seeking mid level C#.Net Software Developers, with 3+ years experience, to join their dynamic and innovative software development team. You will play a critical role in the development of their proprietary software applications. The ideal candidate will have a background in C# and Microsoft .Net technologies and a proven ability to thrive within an Agile environment. You must have a “can-do” attitude to complement their team. You will: Collaborate with a small team of developers in a Rapid Application Development (RAD) environment with a strong emphasis on Agile delivery. Develop and maintain software for large-scale systems with long life cycles, tailored to multiple customers with varying configurations. Apply your technical expertise in C#, .Net Core (primarily), ASP.NET and MS SQL Server. Knowledge of the .NET Framework is expected, which is their current platform, though familiarity with .Net 6+ is a plus, which they will be transitioning to. Experience with Azure is an added advantage as they using Azure for their cloud services. You will need to have a background in application software development using C#, ASP.NET, MS SQL, and the .NET Framework. This is an urgent requirement with interviews taking place imminently so please apply immediately to be considered. TPBN1_UKTJ

.NET Developer

Syntax Consultancy Limited

Leeds (Hybrid)Permanent£60,000 (DOE).Net Developer needed with strong .Net Core and AWS Serverless experience for a permanent career opportunity based in Leeds (Hybrid).Hybrid Working - 3 days/week remote (WFH), and 2 days/week working on-site in the Leeds office. Start ideally Dec 2025 / Jan 2026.A chance to work with a leading global IT transformation business specialising in large-scale Government projects.Key experience, responsibilities + tasks:

.NET Core Developer with expertise in building Cloud-native applications.

Strong hands-on back-end development using .NET Core, AWS serverless architecture + DevOps pipelines.

Strong experience in .NET Core, ASP.NET Core (Web APIs, microservices).

Building + optimizing .NET Core microservices and RESTful APIs.

Developing + maintaining scalable serverless applications using AWS services such as: AWS Lambda, API Gateway, DynamoDB, S3, Step Functions, EventBridge, SNS/SQS, AppSync.

Expertise in AWS serverless services (Lambda, API Gateway, S3, DynamoDB), DevOps practices + CI/CD pipelines.

Front-end development frameworks such as React or Blazor is an advantage.

Implement and manage CI/CD pipelines using Azure DevOps, or GitHub Actions.

Ensuring application security, monitoring, logging using AWS CloudWatch + IAM best practices.

Technical Environment: Git, Docker, Containerization, automated deployment, Databases (SQL/NoSQL, PostgreSQL, DynamoDB), Infrastructure as Code (IaC), AWS CDK, Terraform, CloudFormation.

Benefits: Salary to £60k (DOE) + Hybrid Work + Bonus + Pension + 22 days holiday plus BHs (rising to 25 days) + Death in Service + Health Care Plan + More.

Senior Full Stack Web Developer

Job: Senior Full Stack Web Developer - ONSITE

Mon-Fri onsite in Debden IG10

Salary to £100k (multiple roles & levels)+ pension scheme + health

Free onsite gym & parking

Offices are a 5 mins walk from Debden tube station (Central line) withclose road links to M11/M25/A406/A12

NB: Please only apply if you are able to work from their Debden (IG10) offices Monday-Friday. Hybrid or remote working is not available. Candidates must be able to demonstrate a sub-60 mins each-way commute time.CompanyEstablished in 2009 and regulated by the FCA, this multi-award-winning finance & credit company has a proven track record for customer and employee satisfaction. With a Trustpilot rating of 4.8/5 and over 33,500 combined online reviews, they pride themselves on their customer service and their duty as a responsible lender.What they are looking forThey are seeking an extremely driven, passionate and motivated individual to join their in-house development family. Their ideal candidate will enjoy learning, seeing projects through to completion and thrive on new challenges. As a member of their team, you will have the opportunity to work on their public-facing API and back-office websites in a Test-Driven Agile environment. They are always exploring the latest technologies and have recently migrated to Azure where they will be modernising from VMs to App Services, SQL MI and utilising many other services on offer. Other future projects include incorporating .NET Core, SignalR and AI technology such as ChatGPT. Your role will involve enhancing their websites using the technologies listed below and integrating new technologies as needed.NB: Please only apply if you are able to work from their Debden offices Monday-Friday. Hybrid or remote working is not available.Main duties and responsibilitiesDeveloping website features and fixing bugs using C#, Entity Framework, Azure Service Bus and SQL ServerWriting unit and integration tests using NUnitStyling website changes in CSSDeveloping JavaScript code using frameworks such as VueAttending scrum meetings and briefings with project owners and peersWriting SQL scripts to modify database schema in SQL Server 2014RequiredRecent legacy .Net projects (essential)ASP.NET 4.6+MVC 5C# 6 including advanced language features e.g., generics, lambdas, delegatesDesign Patterns and SOLID PrinciplesEntity Framework 6+SQL Server 2014+TDD/NUnitJavascript/JQuery/AJAXHTML5/CSS3DesirableASP.NET CoreAzure Service BusEntity Framework CoreVueAgile methodologies/ScrumAutomated browser testing/SpecFlow/SeleniumSignalRECMAScript6AngularJSOther StuffNB: Please only apply if you are able to work from their Debden (IG10) offices Monday-Friday. Hybrid or remote working is not available. Candidates must be able to demonstrate a sub-60 mins each-way commute time.For non-UK Citizens: we cannot accept applications from anyone requiring sponsorship (now or in the future) for UK permanent employment status. If you are using a work visa this must allow you to work in the UK unrestricted for at least the next 5 years.In accordance with GDPR by applying you give Profile 29 consent to use your data for recruitment purposes only (details of Profile 29s privacy policy can be found at: profile-29 .com/privacy)Profile 29 recruitment keywords: senior web developer lead web developer London Essex ASP.NET MVC MVC5 C# 6 Design Patterns SOLID Entity Framework SQL Server TDD NUnit Javascript Jquery AJAX HTML5 CSS finance fintech

Senior C# Developer .Net Core - FinTech

Senior C# Developer / Backend Software Engineer (C# .Net Core) *Newcastle onsite* to £130k+Are you a backend focused C# Developer with a strong academic background, looking to take the next step in your career? This is an opportunity to work on complex, high-impact systems at a growing FinTech scale-up with solid financial backing, a major Hedge Fund partnership, and ambitious plans for expansion.What’s in it for you:

Salary (to £130k, negotiable) + Bonus

25 days holiday

Bupa healthcare

Generous pension contribution

Continuous career development opportunities

Social team atmosphere with a range of events and early finish for drinks on Fridays

Your role:As a Senior C# Developer you will collaborate with a small, talented team to deliver the core platform within a Microsoft environment using the latest versions of C# .Net to produce high quality code. You’ll take ownership of technical projects, working across the full development lifecycle to understand business needs.The company has ambitious growth plans, this is a great opportunity to be involved from the ground up and progress your career.Location:You’ll join colleagues in brand new Central Newcastle offices on a full-time basis (Monday to Friday), working hours 0900-1800 with some flexibility. The offices are well equipped and offer fantastic views across the City and the local countryside, many employees walk or cycle in (onsite showers available!).About you:

You have achieved a minimum 2.1 BSc in Computer Science or similar technical discipline from a top tier / Russel Group university, backed by A’s at A-level

You’re a technologist who enjoys collaborating and problem solving, working on complex, distributed systems

You have expertise with modern C# .Net Core, Python skills would also be of benefit

You have a strong knowledge of modern software engineering best practices and have experience across the full software development lifecycle

You have a thorough understanding of Computer Science fundamentals such as OOP, Data Structures, Design Patterns, Algorithms

You’re excited to join a start-up in a role that you can shape and influence

Apply now to find out more about this Senior C# Developer / Backend Software Engineer (C# .Net Core) opportunity.At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We’re an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.

Lead Software Developer

Exalto Consulting ltd

Lead C#.Net Software Developer (C#, ASP.NET/.Net Core , SQL Server) This is a hybrid role, with 2 days a week onsite in Crewe or Chester. My client are an innovative software development company delivering mission-critical Azure hosted software in their respected sector. Their collaborative and fast paced environment utilises Agile methodologies to deliver cutting edge solutions for their diverse customer base. They are seeking Lead C#.Net Software Developers to join their dynamic and innovative software development team. You will play a critical role in the development of their proprietary software applications. They are currently building Software Development squads so you will be the Lead Developer for one of the squads. This role is 70% team / line management and 30% hands on. The ideal candidate will have a background in C# and Microsoft .Net technologies and a proven ability to thrive within an Agile environment. You must have a “can-do” attitude to complement their team. You will: Collaborate with a small team of developers in a Rapid Application Development (RAD) environment with a strong emphasis on Agile delivery. Develop and maintain software for large-scale systems with long life cycles, tailored to multiple customers with varying configurations. Apply your technical expertise in C#, .Net Core (primarily), ASP.NET and MS SQL Server. You will be given the opportunity to work with Azure as they are using Azure for their cloud services. You will need to have a background in application software development using C#, ASP.NET, MS SQL, and the .NET Framework. They will happily consider back end Developers with C#, .Net and SQL Server skills. This is an urgent requirement with interviews taking place imminently so please apply immediately to be considered. TPBN1_UKTJ

Senior Software Developer

Exalto Consulting ltd

Senior C#.Net Software Developer (C#, ASP.NET/.Net Core , SQL Server) This is a hybrid role, with 2 days onsite every week in Crewe or Chester. My client are an innovative software development company delivering mission-critical Azure hosted software in their respected sector. Their collaborative and fast-paced environment utilizes Agile methodologies to deliver cutting-edge solutions for their diverse customer base. They are seeking a Senior C# Software Developer to join their dynamic and innovative software development team. You will play a critical role in the development of their proprietary software applications. The ideal candidate will have a background in C# and Microsoft .Net technologies and a proven ability to thrive within an Agile environment. You must have a “can-do” attitude to complement their team. You will: Collaborate with a small team of developers in a Rapid Application Development (RAD) environment with a strong emphasis on Agile delivery. Develop and maintain software for large-scale systems with long life cycles, tailored to multiple customers with varying configurations. Apply your technical expertise in C#, .Net Core (primarily), ASP.NET and MS SQL Server. Knowledge of the .NET Framework is expected, which is their current platform, though familiarity with .Net 6+ is a plus, which they will be transitioning to. Experience with Azure is an added advantage as they are using Azure for their cloud services, but it is not essential as opportunities to work with it will be provided. You will need to have a background in application software development using C#, ASP.NET, MS SQL, and the .NET Framework. They are happy to consider strong C#, SQL Server backend Developers too. This is an urgent requirement with interviews taking place imminently so please apply immediately to be considered. TPBN1_UKTJ

Full Stack .NET Developer - Azure - Preston

Full Stack C# .NET Developer with experience in both back-end C# .NET / .NET Core development and front-end JavaScript development (Vue.js / Angular / React, etc) is required by a leading company in Preston. You should also have some development experience in the Cloud with Azure & third-party API integrationsThere is some excellent investment in AI technologies, so a chance to work on some cutting-edge software development projects in AI advancement, along with several greenfield projects ready to go.Key skills:

Full-stack development experience in both C#.NET and JavaScript (Vue.js / Angular / React etc) with a passion for embracing new front-end technologies.

Azure experience with a good appreciation of Azure Functions, Storage Accounts, Service Bus, Application Insights, and Key Vault

Agile, SQL Server and WebAPI experience

Familiar with modern web technologies such as HTML5, CSS3, and JavaScript.

This is a fantastic chance to join a software engineering team of 6 people, which is growing. You will be involved in full-stack development in an Agile environment with the opportunity to bring in new ways of working and technologies if needed. The new greenfield projects are exciting and fun to work on, and the team is constantly looking to challenge each other from a coding point of view. If you love code but want to engage with a business to help draw up requirements and take ownership of projects, then this job is for you.Job responsibilities include:* Work on a range of projects, developing new software solutions to help the business keep on progressing. * Be responsible for delivering high-quality solutions to specification and on time * Actively contribute to the continuous improvement process and drive efficiencies within the team ?? * Uphold good development planning and procedures * Follow industry best practices and coding standards * Optimise application performance and improve user experience through innovative front-end and back-end development techniquesMy client is looking to pay a starting salary of between £50,000 - £60,000 + Benefits + Hybrid working (2 days in the office). To apply, send your CV to matthew.leach @ circlerecruitment.com or press apply now:Keywords: Full Stack C #.NET Developer - JavaScript - Vue.JS - React - Angular JS - MVC - ASP.NET - .NET Core - Azure - Cloud -TDD - Docker - Preston - Blackpool - Blackburn - Bolton - Warrington - Liverpool - Wigan - ManchesterCircle Recruitment is acting as an Employment Agency in relation to this vacancy. Earn yourself a referral bonus if you refer somebody else who fills the role! We also offer an iPad if you refer a new client to us and we recruit for them. Follow us on Facebook - Circle Recruitment , Twitter - @Circle_Rec and LinkedIn - Circle Recruitment.

Cloud Architect

Chroma Recruitment Ltd

Chroma is partnering with a world-renowned leader in scientific tools to recruit a talented Cloud Architect for their expanding team. This is an excellent opportunity for an experienced architect to make an immediate impact and contribute from day one. This is a hybrid role, (3 days a week onsite at their office near Cheadle Hulme), with a salary of up to £103K.This company operates globally, developing high-performance scientific instruments and software designed to drive innovation in research and contribute to better human health.As a Cloud Architect, you will build systems that actually make a difference. Youll be responsible for designing and building scalable cloud-based SaaS platforms, leveraging customer feedback to create solutions that support global healthcare manufacturing. Youll split your time between being hands-on with the team and architecting big-picture solutions, modernising existing platforms, or building new ones from scratch.If you love designing complex systems, know your way around cloud development, and enjoy seeing your work have real-world impact, this could be the role for you!Key Skills:

Strong experience in application and database architecture, with a focus on security

Experienced in building and implementing cloud platforms in line with the AWS Well-Architected Framework

Solid hands-on experience with development best practices, including .NET, .NET Core, and CI/CD

Desirable Skills:

Worked in large enterprise organisations

AWS Solution Architect certification

If this role sounds of interest, please contact Julia on 07305019879 or email

Full Stack Developer Billingham / Hybrid Circa £50,000 + Excellent benefits and Bonus opportunitiesThis profitable and growing business require a Software Developer, who will be responsible for developing, designing and building an internal product suite. You will translate business requirements into robust, scalable, and high-performing software solutions, utilising your expertise to suggest improvements.This is a hands-on development role, and you will be joining an Agile team that host applications in the cloud and on-prem. You will contribute to all stages of the development lifecycle from design, development, QA and continuous integration. You will have access to modern technologies and the support to expand on your technical repertoire.In the position of Software Developer, you will have the opportunity to work on innovative projects within a supportive and collaborative team environment whilst making a meaningful impact in a growing organisation.For this role, there are hybrid working options, with the opportunity to work two days per week from home.Key Requirements:

C#, .NET Core

Experience of the entire software development lifecycle.

Agile / Scrum

JavaScript

SQL Server, ETL processes, System integrations

API Development

Azure - Beneficial

Strong communication skills.

Package:

Life assurance, pension contributions, Healthcare and wellbeing, Retail Discounts, Cycle 2 Work and many more.

Clear development plan.

The company have an excellent reputation within their sector and have shown consistent growth over the past few years. You will be joining a small but growing development team, that promotes a healthy work-life balance and will give you the opportunity to develop your technical knowledge.Click APPLYto be considered for the role as my client is aiming to interview as soon as possible. The process will require two stages and potentially a technical exercise.If you have not heard back from us within 5 working days, please assume that your application has been unsuccessful on this occasion. Your profile may be considered for other suitable vacancies that arise within the next 12 weeks.Contact Millie EllisErin Associates welcomes applications from people of all ethnicities, genders, sexual orientations, and disabilities. Please inform us if you require any reasonable adjustment at any stage of the application process..NET Developer, Software Developer, Full Stack Developer, Product Developer Newcastle, North Shields, South Shields, Hebburn, Middlesbrough, Durham, Stockton-on-Tees, Gateshead, Sunderland, Hartlepool, Cramlington, Northeast, Darlington, York, Ripon, Thirsk

SC Cleared Software Engineer (.Net)

SC Cleared .NET Software Engineer Remote (UK) - Central Government Salary: £60k per annumClearance: Active SC requiredA leading defence and security technology consultancy is seeking an SC Cleared .NET Software Engineer to support secure government projects. Known for their cutting-edge solutions and commitment to innovation, they offer a dynamic and collaborative work environment where employees can thrive.You’ll develop .NET applications, build RESTful APIs, work with Azure services, and contribute to CI/CD pipelines-all while ensuring compliance with strict security standards.Requirements:Active SC Clearance (mandatory)Strong .NET Core / .NET Framework and C# skillsExperience with RESTful APIs , OAuth/JWT , and API securityFamiliarity with Azure App Services, Functions, Storage, SQLExperience using Azure DevOps for CI/CDUnit/integration testing experience (xUnit/NUnit)Desirable:Cybersecurity knowledgeDefence/security sector experienceAgile delivery experienceIf you’re an SC Cleared .NET Engineer seeking meaningful work within national security, apply now with your updated CV .*P. S: Company cannot provide visa sponsorship, so only candidates residing in UK and with the existing right to work will be considered for the role.TPBN1_UKTJ

Senior Developer

Unimill Engineering Limited

Company OverviewWe are a leading CNC milling company specializing in high-precision components and assemblies for the aerospace Industry. Our In-house developed ERP system Is critical to our operations, streamlining processes from customer orders to job tracking across departments.Job SummaryWe are seeking an experienced Senior Developer to enhance and maintain our custom ERP system. The successful candidate will lead the development, optimisation, and support of our mission-critical application, ensuring seamless operations for our manufacturing processes. You will also have a key role in future architecture decisions and modernisation strategies.Key Responsibilities

Design, develop, and maintain the ERP system covering:

Customer Order Management.

Order Scheduling.

Purchasing (including raw materials).

Job Management and Tracking across all departments.

Integration with internal applications as well as customer and supplier facing services.

Write clean, efficient, maintainable and well documented code in C# for the .NET WinForms application.

Optimize and manage SQL Server databases, Including stored procedures, triggers, and Reporting Services for business Intelligence.

Collaborate with cross-functional teams to gather requirements and implement new features.

Troubleshoot, debug, and resolve system issues to ensure high availability and performance.

Contribute to system architecture decisions and propose modernisation strategies.

Required Qualifications

Bachelor’s degree in Computer Science, Software Engineering, or a related field would be useful but not necessary.

6+ years software development experience.

Expertise In C# and NET WinForms development.

Strong proficiency in SQL Server, Including T-SQL, stored procedures, and SQL Server Reporting Services (SSRS).

Experience with ERP systems, preferably in manufacturing or aerospace industries would be desirable.

Solid understanding of database design, optimisation, and performance tuning.

Excellent problem-solving skills and attention to detail, strong communication and teamwork abilities.

Preferred Qualifications

Experience with CNC milling or aerospace manufacturing processes.

Familiarity With Integrating ERP systems With shop floor systems or loT devices.

Knowledge of modernising legacy .NET applications (e.g, migrating to .NET Core or Cloud).

Experience With version control systems (e.g. Git) and Agile methodologies.

Tech Stack

Backend: SQL server (on-premise) with Reporting Services.

Frontend: .NET WinForms application written In C#.

Platform: Windows devices.

Why Join us?

Work on critical systems that drive manufacturing excellence.

Collaborate with a passionate team in a dynamic, Innovative environment.

Competitive salary, benefits including hybrid working, company pension and opportunities for professional growth.

Full Stack Developer

Spectrum It Recruitment Limited

C#, React, Azure DevOps Hybrid - Poole, Dorset (1 / 2 days per week in the office) £45,000 - £50,000We’re looking for a Full Stack Developer to join our agile software team and help build innovative, life-critical SaaS solutions for a global security company. You’ll play a key role and be involved in all aspects of the Software Development Life Cycle (SDLC) including design, development, testing, deployment, release, and monitoring of applications.In addition to hands-on development, this role will take ownership of Azure DevOps pipelines, release management, and site reliability engineering (SRE) practices to ensure smooth, secure, and reliable delivery of our solutions.What You’ll Do

Design, develop, and maintain full stack applications using React, .NET Core, Entity Framework, RESTful APIs, and GraphQL.

Build and enhance CI/CD pipelines to support automated testing, secure builds, and reliable deployments.

Apply infrastructure-as-code practices and DevOps tooling to improve automation and consistency across environments.

Work with the team to establish and follow best practices in software engineering, cloud security, and observability.

Required Skills:

Strong experience with .NET Core, C#, Entity Framework, and RESTful API development.

Frontend expertise with React (TypeScript preferred).

Hands-on experience with DevOps (pipelines, builds, releases).

Understanding of site reliability engineering principles, including monitoring, logging, and incident response.

Familiarity with SQL and relational databases.

Knowledge of agile practices (Scrum/Kanban).

Desirable skills/qualifications:

Exposure to infrastructure as code (ARM/Bicep, Terraform, or similar).

Experience with GraphQL (consuming or building APIs).

Familiarity with Application Insights, Azure Monitor, or similar observability tools.

Good understanding of cyber security.

If you have the relevant skills for this role and are ready for the challenge, then please send your CV toSpectrum IT Recruitment (South) Limited is acting as an Employment Agency in relation to this vacancy.

Software Architect / Engineering Manager

About the Role Ocho are working exclusively with a high-growth technology business undergoing major platform transformation. They are searching for a Software Architect / Engineering Manager to take ownership of large-scale modernisation, define architectural direction and lead senior engineering teams through complex technical change.This is a rare opportunity to step into a genuinely strategic leadership role where you will shape long-term platform strategy while remaining close to the technical detail.You will lead the transition from legacy systems to modern, cloud-native architecture. Working closely with senior product, infrastructure and engineering leaders, you will define technical direction, drive engineering standards and ensure high-impact delivery across performance, reliability and scalability.You will balance architectural ownership with people leadership, mentoring multiple teams and building a high-performance engineering culture.Key Responsibilities

Define and lead modern architecture strategies for large-scale platform transformation

Drive migration from monolithic systems to modular, API-led and event-driven architectures

Provide architectural oversight across multiple business-critical applications

Lead cloud migration, containerisation and automation initiatives

Champion software quality, engineering standards and best practices

Introduce AI-enabled engineering tooling to improve efficiency and quality

Manage and mentor multi-disciplinary engineering teams across multiple locations

Establish and run architecture governance and review structures

Own delivery of architectural initiatives from concept through to production

Communicate complex technical decisions clearly at senior stakeholder level

What You Will Bring

10+ years commercial engineering experience with deep expertise in .NET and cloud platforms

Strong background in enterprise system modernisation and distributed architectures

Proven leadership experience as a Principal Engineer, Architect, Engineering Manager or Site Lead

Hands-on experience modernising legacy platforms into scalable, cloud-native systems

Expertise across Azure or AWS, Kubernetes, CI/CD and automation

Excellent mentoring, coaching and stakeholder communication skills

Comfortable leading large engineering groups

Technical Stack

.NET / C#, Web Forms, .NET Core, REST APIs

Java and Python for proofs of concept

Azure or AWS, Kubernetes, Docker

SQL Server, Postgres, performance engineering and caching

Event-driven systems, messaging and distributed architectures

What’s on Offer:

Competitive salary up to £90k

Generous benefits package

Flexible Hybrid working with occasional office days

Own and shape a major platform transformation programme

Senior leadership position with long-term architectural impact

Strong investment in modern engineering culture and tooling

For more information on this opportunity, connect with Neill Ferguson on LinkedIn or submit your CV via the link below.Skills: engineering manager architect .netBenefits: Work From Home

Leeds (Hybrid)Permanent£60,000 (DOE).NET Developer needed with strong .NET Core and AWS Serverless experience for a permanent career opportunity based in Leeds (Hybrid).Hybrid Working - 3 days/week remote (WFH), and 2 days/week working on-site in the Leeds office. Start ideally Dec 2025/Jan 2026.A chance to work with a leading global IT transformation business specialising in large-scale Government projects.Key experience, responsibilities + tasks:

.NET Core Developer with expertise in building Cloud-native applications.

Strong hands-on Back End development using .NET Core, AWS serverless architecture + DevOps pipelines.

Strong experience in .NET Core, ASP.NET Core (Web APIs, microservices).

Building + optimizing .NET Core microservices and RESTful APIs.

Developing + maintaining scalable serverless applications using AWS services such as: AWS Lambda, API Gateway, DynamoDB, S3, Step Functions, EventBridge, SNS/SQS, AppSync.

Expertise in AWS serverless services (Lambda, API Gateway, S3, DynamoDB), DevOps practices + CI/CD pipelines.

Front End development frameworks such as React or Blazor is an advantage.

Implement and manage CI/CD pipelines using Azure DevOps, or GitHub Actions.

Ensuring application security, monitoring, logging using AWS CloudWatch + IAM best practices.

Technical Environment: Git, Docker, Containerization, automated deployment, Databases (SQL/NoSQL, PostgreSQL, DynamoDB), Infrastructure as Code (IaC), AWS CDK, Terraform, CloudFormation.

Benefits: Salary to £60k (DOE) + Hybrid Work + Bonus + Pension + 22 days holiday plus BHs (rising to 25 days) + Death in Service + Health Care Plan + More.

NET Core Developer

Cartisian Recruitment

Job Title: .NET Core Developer Location: London, Hampshire, Surrey, Greater London Salary: 80,000 - 100,000We are seeking a talented .NET Core Developer to join our dynamic development team. You’ll play a key role in designing and implementing core modules for our innovative software solutions. Working closely with the wider team, you’ll have individual responsibility for specific modules, ensuring they meet performance, scalability, and quality standards. This is an exciting opportunity to work on cutting-edge technologies and contribute to impactful projects.Key Responsibilities

Design, develop, and maintain application modules, including the Database Module, API Module, Engine, and Logic.

Build and enhance REST APIs to ensure robust and efficient communication between application components.

Develop scalable solutions using .NET Core and C#, adhering to best practices and coding standards.

Implement and optimize data storage solutions using Entity Framework and SQLite.

Collaborate with team members to integrate individual modules into the larger system architecture.

Conduct code reviews, write unit tests, and debug to ensure quality and reliability.

Document technical designs and maintain clear communication with the team and stakeholders.

Skills and Experience

Proficiency in .NET Core and C#, with a strong understanding of object-oriented programming principles.

Experience designing and building REST APIs with a focus on performance, security, and scalability.

Hands-on experience with Entity Framework and integrating SQLite for data storage and retrieval.

Strong problem-solving skills and the ability to develop and debug complex logic.

Familiarity with version control systems (e.g., Git) and CI/CD pipelines.

Excellent communication skills and the ability to work collaboratively in a team environment.

Due to our high vacancy response rates unfortunately, we are not able to reply to all applicants. If you have not had feedback from our consultants within 14 days, please accept that your application has not been successful.Cartisian Technical Recruitment are a specialist recruitment agency sourcing engineers for Automation, Scientific Technologies, Automotive, General Engineering & Manufacturing sectors.

+11

Overview We are seeking a highly motivated and skilled Software Engineer to join our dynamic development team. This role offers the opportunity to work on innovative application development projects, utilise a wide range of programming languages and tools, and contribute to the creation of scalable, efficient software solutions. The ideal candidate will have a strong foundation in software development, excellent problem-solving abilities, and a passion for technology. This is a paid position suitable for both experienced professionals and recent graduates eager to develop their careers in software engineering.Key Responsibilities

Lead the design, deployment, and development of web-based and microservice applications using Angular, TypeScript, and .NET Core.

Architect and implement CI/CD pipelines using Azure DevOps.

Conduct code reviews and mentor junior developers.

Estimate, plan, and deliver greenfield and enhancement projects.

Support deployment and configuration of web applications on IIS.

Troubleshoot production issues and provide post-release support.

Maintain comprehensive documentation and ensure secure, scalable solutions.

Perform development and testing tasks using modern tools.

Ensure timely delivery of tasks while maintaining high quality.

Communicate effectively with internal teams and client stakeholders.

Skills and Experience Required

Bachelor s degree (or equivalent) in Computer Science, Software Engineering, or related field.

Minimum 2 3 years professional software development experience.

Strong programming skills in Java, Python, C#, JavaScript, or PHP.

Experience with frameworks such as React, Angular, Node.js, Django, or .NET.

Understanding of databases such as MySQL, PostgreSQL, or MongoDB.

Familiarity with RESTful API design.

Experience with Git version control.

Understanding of software testing methodologies and CI/CD pipelines.

Excellent problem-solving and analytical skills.

Strong attention to detail and ability to manage multiple tasks.

Please note that this will be an in-office Job at Salisbury.

C# Software Developer (with Networking & IT Systems exposure) Location: Wrexham, North Wales Salary: £35,000 + excellent benefits Our client is a leader in developing manufacturing tech and on their behalf we re looking for a sharp, hands-on C# developer who loves building real-world applications that make a genuine difference on the factory floor and in the office.This isn t a typical helpdesk role. Yes, you ll be the go-to person for the company s IT systems, but the main focus is writing clean, maintainable code primarily in C# .NET Core to extend and improve the client’s in-house manufacturing and business platforms. Networking and infrastructure are part of the mix (because everything you build has to talk to the real world), but they re secondary to solid programming skills.THE ROLE

Designing and building new features and tools in C# .NET Core (this is the bulk of the role)

Maintaining and enhancing our existing bespoke applications

Writing scripts and automation tools in Python/PHP when it makes sense

Occasional Laravel/PHP work on internal web tools

Helping keep the infrastructure running smoothly (Windows/Linux servers, Active Directory, VMware, Office 365, backups, Cisco Meraki Wi-Fi, Fortinet firewalls, etc.)

Configuring switches, firewalls, laptops, Raspberry Pis and label printers when needed

Supporting users (mostly remotely via Teams) but this is light compared to the development work

Creating BI dashboards and playing with AI/automation ideas

YOU

First and foremost: strong C# .NET Core skills you enjoy writing code more than resetting passwords

Comfortable with modern development tools (GitHub, VS Code, Jira, etc.)

Happy to touch infrastructure when required you understand networking basics, Active Directory, servers, VMware, etc. (you don t need to be a CCNA, just not scared of it)

Bonus points if you ve worked with SQL Server, IIS, REST APIs, or have any manufacturing/warehouse exposure

Minimum HNC/HND or degree in Computer Science / Software Development (or equivalent experience)

1 2 years+ commercial programming experience (more is fine too)

Why you ll love it here

You get to own and shape real products used every day by hundreds of people

Proper variety one day you re adding a new feature in C#, the next you re deploying a Raspberry Pi on the shop floor

Forward-thinking company that s genuinely investing in digital transformation and AI

Small, friendly IT team no corporate red tape

Great package: enhanced pension, private healthcare, heavily subsidised canteen, 25 days holiday + banks, hybrid flexibility

If you re a C# developer who wants to stay close to the metal, see your code make an immediate impact, and doesn t mind rolling up your sleeves on the occasional bit of networking or infrastructure, this could be perfect.

Senior Full Stack Developer

City Facilities Management

JOB TITLE: Senior Full Stack Developer LOCATION: Glasgow Head Office SALARY: Competitive (depending on experience)This role will be responsible for developing and maintaining end-to-end software solutions across both front-end and back-end systems. Ensure that applications are robust, scalable, and user-focused by combining strong technical expertise with an understanding of business requirements. Contribute to architectural decisions and ensure all software adheres to architectural standards and best practices. Provide guidance and coaching to the team as required.PRINCIPAL TASKS AND RESPONSIBILITIESSoftware Development

Develop high quality technical solutions which meet specified business objectives, whilst adhering to overarching business and technical requirements and constraints.

Ensure all software that is created is in line with the technical roadmap and development guidelines.

Optimise applications for maximum performance, scalability, and security

Work with other members of the team to ensure business requirements are appropriately converted to functional and technical specifications

Troubleshoot, debug, and resolve technical issues across the full technology stack.

Conduct unit testing, participate in code reviews, and support quality assurance processes.

Participate in squad ceremonies including Story Refinement, Sprint Planning and Retrospectives.

As a Senior

Contribute the design, architecture, and planning of complex systems and applications.

Mentor, coach, and support junior and mid-level developers to build skills and improve code quality.

Identify and address technical debt, proposing long-term solutions for maintainability and performance.

Act as an escalation point for complex technical issues across the full stack.

Own and drive major features or projects from concept through delivery.

Contribute to security reviews and ensure robust security practices across applications.

Basic Behaviours

Ensure that continuous improvement is baked into everything we do.

Support the development of a strong culture focused on transparency, collaboration, and high performance

Make time to support other members of the squad and answer questions when they need help.

Take responsibility of your personal objectives and those of the squad.

Take ownership of deadlines and releases for yourself and the team.

Any quality issues of the software the squad owns should be looked on as a temporary and unacceptable state of affairs. Every opportunity should be taken to rectify problems, in conjunction with the completion of squad and individual objectives.

Specific Knowledge:

Microsoft .NET development stack (C#, ASP.NET, MVC, SQL Server)

Azure, .NET Core, Entity Framework

Feather Grey Consulting

Feather Grey Consulting is retained by a long-standing tech business just outside of Milton Keynes to hire a Senior Developer into their close-knit development team. You will need to be a car owner/driver due to the location.This is a hands-on role for someone with a minimum of 5 years experience in .NET Core and strong Azure expertise , comfortable working across complex systems and contributing to ongoing technical improvements.What you ll be doing

Designing, building and maintaining high-quality, secure, maintainable software

Owning complex development work and contributing to architectural discussions

Selecting and applying appropriate Azure services for new and existing features

Supporting releases, incident resolution and continuous improvement

Collaborating with onshore and offshore developers and sharing knowledge within the team

Tech stack and experienceEssential

At least 5 years experience with .NET Core / .NET Framework and C#

Strong Azure experience (Function Apps, Event Grid, cloud architectures, deployment options)

MVC, Web API

SQL Server, T-SQL, Entity Framework

Infrastructure as Code

Unit testing frameworks

Experience working with offshore or near-shore development teams

Comfortable in Agile / Scrum environments

Clear communicator with a collaborative, solutions-focused approach

Nice to have

Kubernetes

If you’re an experienced .NET engineer with strong Azure capability and enjoy working end to end across complex systems, please do apply.Please note you must be eligbile to work in the UK in a permanent role without any restrictions.

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Frequently asked questions

What types of .Net Core jobs are available on Haystack?

Haystack features a wide range of .Net Core job opportunities, including roles such as .Net Core Developer, Backend Engineer, Full Stack Developer, and Software Architect across various industries.

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While experience with the latest versions of .Net Core is beneficial, many employers also consider candidates with solid proficiency in previous versions and related technologies.

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