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Overview
Looking for top C# jobs? Explore the latest C# developer opportunities on Haystack, your go-to IT job board. Whether you're a junior coder or a seasoned software engineer, find the best C# vacancies with competitive salaries and exciting projects. Start your next career move in C# development today!
Software Developer
Oscar Associates Limited
Lincoln
Hybrid
Mid
£55,000
RECENTLY POSTED

Software Developer - C# .NET Core/Vue/AWS - Lincoln - £50,000 - £55,000

The Role

An innovative and growing technology company in the leisure sector is looking to add a talented Software Developer to its UK-based team.

You’ll be contributing to a modern software platform that’s making a big impact across a niche global market. There will be the opportunity to collaborate with other developers and people across the wider technical team working on a variety of existing and greenfield projects.

You’ll join a friendly, cross-functional team where your input will shape key product decisions and help improve the user experience for thousands of active users. The work is varied, ranging across the full stack on a variety of systems.

Requirements

  • Minimum 4 years of experience in Software Development
  • C# .NET Core
  • SQL Server
  • JavaScript/TypeScript/HTML + CSS
  • JavaScript frameworks (Vue ideally but will consider React/Angular/KnockoutJS)

Desirables

  • AWS (EC2, SNS and Cloud Formation)
  • DevOps and build automation tools
  • Agile/Scrum Methodologies

The Company

This is a expanding tech company operating in a niche sector with a stable, global customer base. With team members across multiple countries, they offer the feel of a close-knit startup with the backing and stability of a mature business. They are currently expanding into other global markets, demonstrating their positive growth!

They foster a culture where developers are encouraged to take ownership, be creative, and work collaboratively. You’ll benefit from strong leadership, technical freedom, and the chance to work on products used internationally.

Salary for this role is between £50,000 and £55,000 DOE and further benefits include hybrid working (2 days in the office, 3 days WFH a week), your birthday off, free onsite parking, the opportunity to progress in an exciting sector and much more!

Apply Now

If you’re looking for a role that offers flexibility, challenge, and the chance to build meaningful software in a collaborative setting, this will be the role for you!

Don’t miss out and apply today!

Software Developer - C# .NET Core/Vue/AWS - Lincoln - £50,000 - £55,000

Oscar Associates (UK) Limited is acting as an Employment Agency in relation to this vacancy.

To understand more about what we do with your data please review our privacy policy in the privacy section of the Oscar website.

Software Development Manager
Spectrum IT Recruitment
Multiple locations
Hybrid
Senior - Leader
£90,000 - £100,000
RECENTLY POSTED

Lead the engineering standards behind a High-Growth UK SaaS platform

Software Development Manager

  • NestJS / NodeJS, Vue: .NET backgrounds welcome
  • Manchester (Hybrid: 1 day per week onsite)
  • Up to 100,000 + benefits

If you’re a technically strong engineering leader who built your career on solid engineering foundations (whether in C# / .NET or modern JavaScript frameworks) and still care deeply about code quality, DevOps maturity, and scalable systems, this is a genuinely exciting opportunity.

We’re partnered with a high-growth UK SaaS technology company building data-driven digital products that help commercial teams better understand and engage their customers. As they scale their customer-facing platforms, they’re looking for an experienced Software Development Manager to shape engineering standards and lead the next phase of platform evolution.

The Tech Environment

The company’s stack has evolved. Originally built on a Microsoft / C# / .NET foundation, the platform has transitioned to a more modern stack including: NestJS / NodeJS, Vue, Redis, SQL Server, Snowflake.

They are open to candidates from a strong .NET background who have since gained experience in modern JavaScript/TypeScript ecosystems. Or who can demonstrate the adaptability and technical depth to operate in this environment.

What matters most is engineering quality, architectural thinking, and leadership credibility, not a rigid checklist of frameworks.

You’ll balance people leadership, technical direction, and delivery performance, ensuring teams build maintainable, secure, and high-performing systems.

What We’re Looking For

  • Significant experience in a SaaS or product-led environment
  • Strong previous experience as a hands-on software engineer (C#/.NET or modern JS/TS stacks)
  • Proven leadership of engineering teams
  • Experience building and operating systems at scale
  • A solid understanding of automated testing and QA practices
  • Familiarity with modern DevOps approaches
  • Strong interpersonal and collaboration skills
  • The ability to quickly pick up new tools and solve complex problems

Interested?

If you’re a strong engineering leader who wants to influence platform direction without stepping away from technical depth, this role offers real impact in a growing SaaS business.

Apply now or contact us for more details: (url removed)

Spectrum IT Recruitment (South) Limited is acting as an Employment Agency in relation to this vacancy.

Visualfiles Developer - Home Working
Circle Group
Manchester
Fully remote
Mid - Senior
£55,000
RECENTLY POSTED

Visualfiles Developer - Remote Working

Visualfiles Developer with experience in Visualfiles is required by a leading UK law firm. You can be based anywhere in the UK, as they will allow remote working.

You will be responsible for the delivery of application development to help their users and clients drive improvement within the firm through dynamic case management applications. It is a key role in the business, and you will have a lot of autonomy in the role.

Experience required:

  • Development background with at least 3 years’ experience of designing, developing and delivering bespoke business applications
  • Prior VisualFiles development experience and knowledge of Legal workflows.
  • Commercial awareness and inquisitiveness allow you to understand the challenges faced by the firm and its clients and develop solutions to match.
  • Ability to quickly identify projects that may be at risk, communicating early to manage expectations accordingly.
  • Has an innovative mind-set, with the willingness to experiment and explore new ways of delivering technology solutions.
  • Develops applications with security in mind, protecting data at all times.
  • C#, VB, SQL Server, SSRS, SSIS would be desirable.
  • Willingness to learn new methods and techniques.

The main duties of the role would include:

  • Technical development - responsible for developing business solutions that interface with the line of business applications of the firm as well as customising and configuring off the shelf software;
  • Develop the case management system in order to ensure continual optimisation of business efficiency and procedures;
  • Support the integration of VisualFiles with other firm-wide packages including the practice management system;
  • Propose, design and implement new and innovative systems and analyse existing systems to determine opportunities for streamlining and performance enhancement;
  • When required, assist with business process analysis with a view to further enhancing and developing workflow processes;
  • Work closely with the Projects team with a view to mapping out projects
  • Workflow and integration development - building process improvement workflows across the line of business application stack using the platforms available. Assisting others to integrate workflows into line of business applications;
  • Database development - designing data structures and access methods to support any custom development;

They are looking to pay a starting salary of between £40,000 - £55,000 + Benefits including home working + Bonus. To apply please send your CV to matthew.leach @ circlerecruitment.com or call me on 0161 877 9200 for more information.

Keywords: Visualfiles / Developer / Home based / London / Manchester / Leeds / Bristol / Liverpool / Cambridge / Nottingham / Birmingham / Newcastle / Glasgow / Cardiff

Circle 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.

Systems Simulation Engineer (C# / Real-Time)
Defence
London
In office
Mid - Senior
£55,000
RECENTLY POSTED

About the Opportunity:
A leading UK engineering organisation is expanding its Real-Time Simulation & Experimentation capability and is seeking skilled engineers with strong C# or C++ experience in real-time, embedded, modelling, hardware-integrated or safety-critical environments.

This is not a web or IT development role. It is a hands-on engineering position that involves building simulation environments, integrating hardware, modelling system behaviours, and supporting real-world engineering activities across the full lifecycle.

Engineers from automotive, aerospace, rail, medical devices, robotics, industrial automation, energy, defence, or any other high-integrity engineering sectors will find their experience highly transferable.
What will you be working on?

You will join a multidisciplinary team creating real-time simulations and synthetic environments used to design, test, validate and train against complex engineered systems. Your work will include:

  • Real-time simulation & modelling (SIL/HIL, behavioural modelling)
  • Integration of hardware components with simulation frameworks
  • Building C# and/or C++ components for system representation
  • Developing digital twins and experimental test environments
  • Designing tools to support verification, validation & training
  • Creating visualisation and analysis tools for system behaviours

This is real engineering: modelling physics, behaviours, interfaces, and integrating hardware - not enterprise apps or websites.

Who We’re Looking For?
We are continuing to grow our software team across 2026 and welcome applicants from a broad range of engineering sectors, including:

  • Automotive - ADAS, powertrain, embedded systems, real-time control
  • Aerospace / Avionics - simulation, modelling, system testing
  • Rail & Transportation - signalling, control, safety-critical systems
  • Medical Devices - regulated software, embedded control
  • Robotics & Automation - motion control, real-time behaviour
  • Industrial / Manufacturing Automation - PLC, modelling, hardware integration
  • Energy / Renewables - control systems, digital twins

If you’re an engineer who codes - not a web developer - this role is designed for you.
Essential Skills & Experience

  • Strong experience with C# or C++ in engineering or real-time systems
  • Background in real-time, embedded, simulation or hardware-connected software
  • Experience with system modelling, system behaviour or control systems
  • Exposure to SIL/HIL, digital twins, hardware integration or simulation frameworks
  • Ability to produce robust, maintainable, well-tested code
  • Comfortable working within Agile methods and multidisciplinary teams

Desirable Experience

  • Experience in regulated or safety-critical environments (e.g., automotive, aerospace, medical, rail)
  • CI/CD pipelines
  • Understanding of system architectures and engineering principles
  • Experience with distributed simulation, tools or test automation

What’s On Offer?
This company offers leading benefits including bonus, fantastic combined pension contribution, potential for paid over time, Enhanced parental & family leave and much more!

Security Requirements
Due to the nature of the projects, this role requires British Citizenship and the ability to undergo BPSS pre-employment checks, with additional security vetting where required.

Embedded Software Engineer
Hexwired Recruitment Limited
Cambridge
Hybrid
Mid
£50,000 - £60,000
+1

Embedded Software Engineer – £50k - £60k – semi remote - Cambridge Hexwired Recruitment is recruiting for an expanding Electronics Manufacturer based in Cambridge now seeking an Embedded Software Engineer to help deliver key projects utilising Signal processing algorithms! The company are expanding to meet the demands of their clients and are seeking an Embedded Software Engineer ideally with experience working on Firmware RTOS. You will be working with customers internationally utilising the latest technology in Signal Processing. This is an Embedded Software Engineer job focusing on RF products. Key Skills: \* 3+ commercial Embedded software experience \* Good commercial RTOS experience \* Experience or knowledge of SPI, I2C or UDP \* Experience working on RF or SDR products is highly desirable but not essential \* Any DSP experience is advantageous but not essential The company are looking to offer circa £60k along with an excellent benefits package, excellent career progression and the chance to work on a diverse range of products. If you’re interested in this Embedded Software engineer job, please apply. For more information on this role, or any other jobs across; Embedded, C++ programming, Electronics, FPGA, Javascript, C#, Python, LLM, Data Science, Embedded Linux, Golang Development, Machine Learning, Data Science or Simulation contact us today

Windows Site Reliability Engineer
Intec Select Ltd
London
Hybrid
Senior - Leader
£100,000 - £110,000
+12

Windows Site Reliability Engineer | £110K | Hybrid | London

Overview:
A leading global investment bank is seeking a skilled Windows Site Reliability Engineer to join their London-based Technology team. This is a senior-level leadership role focused on driving platform reliability, automation strategy, and infrastructure modernisation across mission-critical banking systems. This is an excellent opportunity to join an investment banking powerhouse.

Role and Responsibilities:

Lead Platform Engineering and SRE strategy across the organisation
Build scalable, self-service, and resilient infrastructure platforms
Drive Infrastructure as Code and CI/CD adoption, automating manual tasks
Define SLOs and optimise system performance, latency, and scalability
Lead root cause analysis and remediate technical debt
Partner with development teams to improve testing, releases, and deployments
Shape cloud and hybrid migration strategies
Ensure regulatory, audit, and security compliance
Act as senior escalation point for high-severity incidents
Identify cost and efficiency improvements; deputise for senior leadershipSkills and Experience:

Deep expertise in Microsoft Windows Server internals
Advanced knowledge of Active Directory, DNS, DHCP, LDAP, and Kerberos
Extensive experience tuning low-latency, enterprise-scale systems
Strong background in SRE, DevOps, CI/CD, and Infrastructure as Code principles
Advanced scripting and development capability (PowerShell, Python, C#)
Clustering, high-availability, replication, and disaster recovery expertise
Experience with Git, Terraform, Ansible, Jenkins, and TeamCity
Strong understanding of security hardening (CIS) within regulated environments
Deep knowledge of performance monitoring, system internals, and optimisation techniques
Experience working within financial services or other regulated industriesDesirable:

Kubernetes and Docker orchestration
Major cloud platforms (Azure, AWS, GCP)
Nutanix HCI and VMware ESX
Enterprise databases (SQL Server, Oracle, Sybase ASE, MongoDB, Snowflake)
Enterprise monitoring tools (Splunk, Netcool)Package

Circa £110,000 + Excellent Package
London / Hybrid x3 days onsite
Flexible working consideredWindows Site Reliability Engineer | £110K | Hybrid | London

Test Development Engineer
NSD
Kirkcaldy
In office
Senior
£70,000

Senior Test Development Engineer
Location: Kirkcaldy
Salary: Up to £70,000 + £7,500 Welcome Bonus
Security Clearance: Must be eligible for BPSS (SC desirable)
To Apply, email:

The Opportunity

An established and growing advanced engineering organisation is seeking a Senior Test Development Engineer to support the design and development of complex electronic test solutions.

This is a key senior role within a high-growth R&D environment, offering strong technical ownership, leadership responsibility, and genuine progression opportunities.

You will be working on advanced electronic systems supporting mission-critical applications across land, sea, air, and space platforms.

The Role

You will take ownership of the design, development, validation and lifecycle support of test equipment at board, subsystem and system level.

Key responsibilities include:

  • Design and development of functional test equipment for electronic systems
  • Hardware and software integration, debug and fault finding
  • Verification and validation of test solutions
  • Production support, issue resolution and obsolescence management
  • Leading technical design reviews and producing high-quality documentation
  • Mentoring and supporting junior engineers
  • Driving robust, scalable and maintainable test architectures

Essential Skills & Experience

  • Strong analogue and digital electronic circuit design knowledge
  • Proven experience developing test equipment in an engineering environment
  • Test software development experience
  • Excellent hardware troubleshooting skills
  • Experience supporting system integration and debug
  • Experience handing designs into production
  • Ability to produce clear, structured technical documentation
  • Eligibility for UK Security Clearance (minimum BPSS)

Desirable Experience

  • Significant industry experience in test development
  • PXI / LXI test architectures
  • Mentor Graphics schematic capture and PCB layout
  • Measurement uncertainty and validation principles
  • NI LabVIEW, NI CVI, NI TestStand or C#
  • Mixed signal design
  • High-speed serial networks
  • RF electronics awareness
  • Power supply design
Senior Product Test Development Engineer
NSD
Edinburgh
In office
Senior
£70,000/day

Senior Test Development Engineer
Location: Kirkcaldy
Salary: Up to £70,000 + £7,500 Welcome Bonus
Security Clearance: Must be eligible for BPSS (SC desirable)
Type: Permanent | Full-Time

The Opportunity

An established and growing advanced engineering organisation is seeking a Senior Test Development Engineer to support the design and development of complex electronic test solutions.

This is a key senior role within a high-growth R&D environment, offering strong technical ownership, leadership responsibility, and genuine progression opportunities.

You will be working on advanced electronic systems supporting mission-critical applications across land, sea, air, and space platforms.

The Role

You will take ownership of the design, development, validation and lifecycle support of test equipment at board, subsystem and system level.

Key responsibilities include:

Design and development of functional test equipment for electronic systems

Hardware and software integration, debug and fault finding

Verification and validation of test solutions

Production support, issue resolution and obsolescence management

Leading technical design reviews and producing high-quality documentation

Mentoring and supporting junior engineers

Driving robust, scalable and maintainable test architectures

Essential Skills & Experience

Strong analogue and digital electronic circuit design knowledge

Proven experience developing test equipment in an engineering environment

Test software development experience

Excellent hardware troubleshooting skills

Experience supporting system integration and debug

Experience handing designs into production

Ability to produce clear, structured technical documentation

Eligibility for UK Security Clearance (minimum BPSS)

Desirable Experience

Significant industry experience in test development

PXI / LXI test architectures

Mentor Graphics schematic capture and PCB layout

Measurement uncertainty and validation principles

NI LabVIEW, NI CVI, NI TestStand or C#

Mixed signal design

High-speed serial networks

RF electronics awareness

Power supply design

Senior Software Engineer
Oscar Associates (UK) Limited
Oxford
Hybrid
Senior
£60,000
+1

Senior Software Engineer - Oxford (Hybrid)

Salary: £60k + Annual Bonus

We have partnered exclusively with a market-leading Manufacturing company who have an exciting opportunity for a Senior Software Engineer to join their growing team.

This role will be focused on the design, development, and maintenance of their software products within a .NET environment. Successful candidates for this position must have a minimum of 5+ years’ experience developing with .NET, C#, XAML, Avalonia, as well as experience with web client-server application development, and UI development.

Key Responsibilities:

Work on cross-platform projects including cloud-based, RESTful APIs, and client/server-based solutions.

Plan, track, and manage software projects - working both independently and collaboratively within Agile teams to meet project objectives and deadlines.

Design, develop, test, and maintain applications and GUI software across the full software development lifecycle.

Capture and interpret customer and user requirements to deliver high-quality, reliable software solutions.

Develop and maintain real-time and post-process data analysis software.

Apply relevant expertise in order to create robust, scalable, and maintainable code; whilst adhering to company policies and processes.

Develop and maintain software architecture using best practices such as multi-threading, design patterns, and SOLID principles.

Specify, install, and maintain development tools and technologies (e.g., GitLab DevOps, IDEs, testing frameworks).

Investigate and resolve software issues or feature requests raised by internal teams, representatives, or customers.

Contribute to R&D initiatives by identifying opportunities for innovation and improvement in existing or new software products.

Provide guidance, mentoring, and technical support to junior team members.

Essential Skills:

.NET / .NET Core Frameworks

C# and XAML

Avalonia

Web client-server application development

Experience developing user interfaces, data visualisation tools, and interactive software.

Strong communication and teamwork, able to work effectively across technical and non-technical teams.

Minimum of 2:1 degree in programming or computer science or equivalent industry experience required.

Nice to haves:

Git (GitLab DevOps)

Knowledge of communication protocols

AWS

Experience in the Manufacturing or Medical Industry

Background in Electronics Engineering

Benefits:

Competitive base salary (DOE)

Annual profit share bonus

27 days holiday + bank holidays

5% employee and 5% employer contributions via salary sacrifice pension scheme

Flexi hours

Private Medical Insurance

EV Car Scheme

Learning & Development training budget

Smart casual dress code

If you’re an experienced Software Engineer skilled with C# .NET and you are looking to join a market-leading company offering a great benefits package, this could be the perfect opportunity for you.

Please apply to be immediately considered.

Oscar Associates (UK) Limited is acting as an Employment Agency in relation to this vacancy.

To understand more about what we do with your data please review our privacy policy in the privacy section of the Oscar website.

TPBN1_UKTJ

Software Engineer
Hunter Selection
Neath
Hybrid
Mid - Senior
£40,000 - £50,000

Port Talbot SA13 £40-50,000 Commutable from Port Talbot, Bridgend, Swansea, Neath, Briton Ferry, Maesteg, Porthcawl Benefits:- 25 Days + Bank Holidays Pension Life Assurance cover Company sick pay Career progression opportunities Early finish on Friday Hybrid workingThis is an exciting opportunity to join a fast‑moving, innovation‑driven engineering organisation that is expanding its research and development capabilities. The business is deeply committed to continuous improvement - of its technology, its processes, and its people - and is now looking for an experienced Software Engineer to help drive the next generation of their product line. In this role, you'll work at the forefront of firmware and embedded development, contributing directly to a busy new‑product pipeline and playing a key role in bringing advanced, high‑performance devices to market. It's an ideal position for someone who enjoys solving complex technical challenges, and collaborating closely with multidisciplinary teams to refine, test and optimise hardware and firmware systems. If you're passionate about designing high‑quality electronic products, improving engineering processes, and shaping smarter, more capable instrumentation technologies, this is a rare opportunity to make a meaningful impact in a global environment. Roles and Responsibilities: Design and develop embedded and real‑time software, addressing timing constraints, concurrency, hardware interaction, and system‑level challenges. Lead and contribute to the full product development lifecycle, from initial concept and architecture through implementation, testing, release, and ongoing product support. Apply Digital Signal Processing techniques within embedded applications to meet product performance and functionality requirements. Manage projects and tasks effectively, including producing clear, comprehensive technical documentation to support development, verification, and long‑term maintenance.Requirements 8+ years in C/C++ for microprocessors/microcontrollers on bare‑metal and RTOS platforms (QNX, Nucleus, OSE), with strong experience in Python and/or C#. Proficient with Atmel/Microchip Studio, UML design practices, Matlab/Simulink, and software configuration/bug‑tracking tools such as SVN and Mantis. Skilled in field buses (Modbus, MBUS, BACnet, Bluetooth, LoRaWAN) and networking/serial protocols including Ethernet, CAN, RS232, AS‑Interface; solid understanding of SPI/I²C and interpreting hardware datasheets. Strong grasp of design‑for‑test principles and good working knowledge of electronic hardware and embedded debugging.27632/580 Suitable candidates should apply immediately by calling Jack Lavis for this vacancy - on (phone number removed) or by sending your CV directly to him at (url removed) If you are interested in this position please click 'apply'. Hunter Selection Limited is a recruitment consultancy with offices UK wide, specialising in permanent & contract roles within Engineering & Manufacturing, IT & Digital, Science & Technology and Service & Sales sectors. Please note as we receive a high level of applications we can only respond to applicants whose skills & qualifications are suitable for this position. No terminology in this advert is intended to discriminate against any of the protected characteristics that fall under the Equality Act 2010. For the purposes of the Conduct Regulations 2003, when advertising permanent vacancies we are acting as an Employment Agency, and when advertising temporary/contract vacancies we are acting as an Employment Business

Software Engineer – Hardware Integrated Systems
Avanti Recruitment
Glenrothes
In office
Junior - Mid
£45,000
+1

Software Engineer – Hardware Integrated Systems Glenrothes, Fife – Onsite Up to £45,000 – 12 Month FTC (Strong chance of permanence) We’re working with a global engineering business in Glenrothes that designs and builds automated test systems for devices. This role sits within a hands-on engineering team developing software that directly interacts with physical hardware. The Work You’ll be: \* Writing software that controls and communicates with real devices \* Integrating applications with test rigs and equipment \* Working with USB and network device communication \* Supporting migration of legacy test platforms onto newer hardware \* Interfacing with single-board computers and device-level protocols This is not a web application role. The software directly interacts with physical systems. Tech Environment C / C++ Python Some C# Basic SQL Device communication (SSH, Telnet) What We’re Looking For A software engineer who is comfortable working close to hardware and understands how software behaves in real-world environments. You may have worked in: \* Industrial or manufacturing systems \* Test equipment or production environments \* Embedded-adjacent or device control roles \* Automation or hardware-integrated software projects You don’t need deep firmware experience, but you should be confident integrating software with physical systems. Why Consider It \* Hands-on engineering environment \* Clear technical scope \* Immediate ownership of platform migration work \* Strong chance of permanent role after 12 months \* Small team with direct impact If you enjoy seeing software operate in the real world rather than purely in abstract systems, this could be a strong fit

Front End Developer (React / WPF / C#)
Cartisian Recruitment
Farnborough
In office
Mid - Senior
£50,000 - £70,000

Job Title: Front-End Developer
Location: London, Hampshire, Surrey, Greater London
Salary: £50,000 - £70,000

We are seeking a skilled Front-End Developer to join our innovative team. You will take a lead role in designing and building intuitive, responsive applications for key modules such as Scheduling and Reporting. This is a fantastic opportunity for developers passionate about creating polished, user-friendly applications that blend functionality with modern design principles.

Key Responsibilities

  • Design and develop rich, responsive applications using WPF, MVVM, and React.
  • Integrate with REST APIs to ensure seamless communication between the front end and back-end services.
  • Implement key modules such as Scheduling and Reporting, ensuring a smooth and user-friendly experience.
  • Optimize interfaces for performance and accessibility, including support for dark mode and Material Design principles.
  • Collaborate with back-end developers to ensure data flows smoothly and system functionality is maintained.
  • Develop web-based solutions using React, ASP.NET, and Bootstrap when required.
  • Utilize tools like GoJS and Node-RED to create dynamic, interactive front-end elements.
  • Incorporate advanced features such as AI-assisted suggestions to enhance productivity and decision-making.

Skills and Experience

  • Proven experience with WPF and MVVM, delivering desktop-based applications.
  • Strong proficiency in React and C#, including integration with REST APIs.
  • Solid understanding of usability, accessibility, and responsive design principles.
  • Familiarity with web frameworks and libraries such as ASP.NET, Bootstrap, and Material Design.
  • Awareness of advanced design trends such as Glassmorphism and dark mode support.
  • Experience using GoJS and Node-RED for interactive front-end features.
  • Strong problem-solving skills, attention to detail, and the ability to debug complex issues.

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.

Cloud Infrastructure Engineer
VIQU IT
London
Hybrid
Mid - Senior
£600/day - £700/day
+4

Cloud Infrastructure Engineer 8 months SC Cleared Hybrid - London

My customer is looking for an SC Cleared Cloud Infrastructure Engineer with strong cloud and Infrastructure-as-Code expertise to support the delivery of a large-scale Infrastructure Transformation project.

This role requires a Security Cleared Cloud Infrastructure professional with solid, hands-on experience with DevOps, Terraform, and GitHub.

Responsibilities of the Cloud Infrastructure Engineer:

  • Lead the complete transition of applications into the Azure environment.
  • Create Automation by implementing CI/CD pipelines using GitHub.
  • Implement and manage Infrastructure as Code (IaC) working with tools such as Terraform.
  • Provide SRE-level support, troubleshooting, and incident resolution for complex cloud environments.
  • Coach less-experienced engineers and champion collaborative knowledge-sharing.
  • Installing and configuring Windows based systems.
  • Integrate PowerShell automation with database operations
  • Writing clear and concise documentation.

Essential Skills of the Cloud Infrastructure Engineer:

  • Must hold an Active SC Clearance.
  • Must have experience completing large scale transformation projects.
  • Must have extensive hands-on experience:
    • Azure DevOps
    • PowerShell
    • SQL
    • CI/CD pipelines
    • GitHub
    • Terraform (Infrastructure as Code)
  • Desirable hands-on experience:
    • Kubernetes
    • C# development
    • Packer
    • Helm
    • AKS
    • Flux

The successful Cloud Infrastructure Engineer must be available to work 2 days a week onsite in Central London.

Apply now to speak with VIQU IT in confidence. Or reach out to Matt Farrell via the VIQU IT website.

Do you know someone great? We ll thank you with up to £1,000 if your referral is successful (terms apply).

For more exciting roles and opportunities like this, please follow us on IT Recruitment.

Senior Software Engineer - ATE
Verso Recruitment Group
Reading
Hybrid
Senior
£50,000 - £65,000

Job Title: Senior Software Engineer ATE
Location: Reading
Employment Type: Permanent
Working Model: Hybrid (typically 3 days on site, 2 from home; task based flexibility available)

A client of our are seeking a Senior Software Engineer to take full ownership of designing and delivering a brand new Automated Test Equipment (ATE) system. This is a hands on, end to end engineering role where you will define the architecture, build the tooling, and shape the test strategy that will support both product validation and production testing.

You ll collaborate closely with hardware, firmware, and systems engineering teams to develop a scalable, robust ATE platform that integrates seamlessly with instrumentation, embedded systems, and manufacturing processes.

Key Responsibilities

  • Architect, design, and implement a new ATE system, including software, tooling, and test workflows.
  • Develop automated test software using Python and C#, C/C++.
  • Build test frameworks, scripts, and infrastructure for validation and production environments.
  • Integrate with instrumentation, hardware interfaces, and measurement equipment.
  • Configure and optimise Linux based systems within the ATE environment.
  • Collaborate with cross functional teams to define test requirements and ensure full coverage.
  • Investigate test failures, analyse logs, and support root cause analysis.
  • Produce documentation, test procedures, and contribute to continuous improvement of test processes.

Required Skills & Experience

  • Strong hands on experience with Python for automation and tooling.
  • Solid programming capability in C#, C/C++.
  • Proven experience designing and implementing ATE for embedded systems or electronics.
  • Confident working in Linux environments.
  • Background in developing or supporting ATE systems or similar hardware software test platforms.
  • Understanding of hardware interfaces such as UART, SPI, I2C, Ethernet, or similar.
  • Ability to debug across software, hardware, and system boundaries.
  • Comfortable taking ownership of a new system from concept through to delivery.

Please note: our client is unable to provide visa sponsorship. We can only consider applicants who already hold full and unrestricted right to work in the UK. Unfortunately, this role is not suitable for candidates relying on a post study work visa.

For more information, please contact Cathy Swain.
T: (phone number removed)
E: (url removed)

Lead Developer, .NET, C#, React, Azure, DevOps, Mainly Remote
Carrington Recruitment Solutions
London
Fully remote
Senior
£85,000 - £100,000

Lead Developer, Full Stack Engineering, Azure, .NET, C#, React, Mainly Remote

Lead Developer required for a fast growing and forward thinking Professional Services organisation. This is mainly remote, with occasional office time in Central London when genuinely needed. Please read in full before applying.

We need a hands-on full stack Lead Developer who can also lead people, set standards and deliver real outcomes. This is not a role for someone who “just writes code”. It is for someone who understands why they are building something, not just how.

You will work across modern engineering, cloud technologies and digital delivery, guiding a small development team while collaborating with Product, Architecture and wider technical groups. This is all about building with purpose, solving real problems and helping take this organisation on a proper technology journey.

Key development skillset required:

  • C#, .NET platform, JavaScript, HTML/CSS, Azure PaaS (Azure Functions, Azure Logic Apps, Cosmos DB, Azure App Service, ARM/Bicep templates), SharePoint and React
  • Good understanding of Azure DevOps processes, in-depth understanding of Azure Resource Management.

What you will be doing:

  • Leading a small development team across a portfolio of applications.
  • Being hands on while also shaping delivery and engineering standards.
  • Working with Product Managers and business teams to prioritise and allocate work.
  • Delivering both strategic and tactical technology solutions.
  • Applying modern DevOps and exploring emerging technologies such as artificial intelligence and machine learning.

This is a great opportunity and salary is dependent upon experience. Apply now for more details.

Mid-Level .NET Engineer
SR2
Not Specified
Hybrid
Mid
£45,000 - £60,000

Mid-Level Backend Developer C#, .NET Core & SQL Salary 45-60k Hybrid (North Bristol)

Would you like to join a national organisation that helps thousands of people across the UK during their time of need?

They’re looking to add a couple of Mid-Level Backend Developers to one of their core product teams. These products impact thousands of users daily, so you’ll get to work on products that are in production and see the fruits of your labour.

Their backend stack centres on C#, .NET Core & SQL, and a big focus for them is staying up to date with the latest developments in software engineering, so you’ll be working on cutting-edge tech. Beyond your technical skills, they love people that work with the user in mind, collaborating closely with product, design, and engineering colleagues to deliver software that genuinely solves real-world problems.

This is a fantastic opportunity to join a company that not only cares deeply about its customers but also invests heavily in technology. You’ll also benefit from working alongside some of the best technical leaders that I know in the Southwest - career development potential here is absolutely fantastic!

What you’ll need

  • Strong commercial experience as a Backend Developer (you can also have worked in a full stack role if you are particularly backend focussed)
  • Proven expertise with C#, .NET Core & SQL
  • Ideally experience in a product-side environment, but an agency background will be considered if you’ve worked on complex engineering products
  • Ability to work effectively in a collaborative, multi-functional team
  • High levels of curiosity and a user-focused mindset - you care about building solutions that solve real problems
  • High levels of curiosity and the desire to create solutions that solve the problems of users
  • Happy to come into the office in North Bristol 2 days a week (public transport is possible but it’s best to have a car if you don’t live in walking distance - free parking is available!)

If you want to join a company with over a century of history that’s still driving innovation and delivering positive impact to its customers, click apply below or drop me a line at .

Net Developer
Vocative Consulting
Gloucester
Hybrid
Mid - Senior
£50,000
+6

.NET Developer

Hybrid (occasional visits to Bristol)

£50,000

Build powerful software. Shape modern web experiences. Grow your career.

Are you a passionate .NET Developer ready to take the next step in your career? We re looking for a motivated, adaptable problem-solver who thrives on delivering high-quality solutions in a collaborative, forward-thinking environment.

This is your opportunity to work with modern technologies, influence technical direction, and make a real impact, all while enjoying the flexibility of hybrid working.

The Role

You will design and develop robust, scalable applications using modern .NET technologies, while contributing to the creation of responsive, high-performing web interfaces. Working closely with cross-functional teams, you will play a key role in delivering high-quality software solutions and continuously improving development practices.

This is a role for someone who enjoys ownership, values collaboration, and is comfortable working in a fast-paced environment with clear deadlines.

Essential Experience

  • Strong understanding of object-oriented programming principles
  • Solid commercial experience with modern responsive web design
  • Ability and willingness to learn new methodologies, technologies and development techniques
  • Motivated, flexible and able to work effectively under pressure
  • Comfortable working both independently and as part of a team or cross-team environment

Tech Stack

  • C#
  • .NET Core / .NET Framework 4.8
  • Visual Studio
  • HTML / CSS
  • TypeScript
  • Angular 2+
  • SQL Server
  • Entity Framework

Desirable Skills

  • SQL Server design, implementation and optimisation
  • AngularJS / jQuery
  • CI/CD (TeamCity)
  • NUnit / Unit Testing
  • AWS
  • Mentoring and supporting other team members

What s On Offer

  • Hybrid working with minimal time in the office
  • Opportunity to work with modern technologies
  • Collaborative and supportive team culture
  • Clear opportunities for progression and technical development

If you re a driven .NET Developer who enjoys solving complex problems and building high-quality software, we d love to hear from you.

Software Architect - JavaScript
Spectrum IT Recruitment
Manchester
Hybrid
Senior - Leader
£100,000 - £110,000

Ready to architect platforms that operate at serious scale?

Software Architect - NestJS, NodeJS, Vue - .NET backgrounds welcome

  • Manchester (Hybrid - 1-2 days per week onsite)
  • Up to 110,000 + benefits

We’re partnered with a fast-scaling UK SaaS company building high-performance, data-driven platforms used by commercial teams to better understand and engage their customers.

They’re now looking for a Software Architect to shape the next generation of their customer-facing systems; designing scalable, cloud-first solutions capable of handling high data throughput and large data sets.

The Environment

The platform has evolved from a Microsoft / C# / .NET foundation into a modern stack including:

  • NestJS, NodeJS, Vue
  • Redis, SQL Server & Snowflake
  • AWS (cloud-first architecture)

Strong .NET Architects who’ve worked in modern cloud and micro-services environments, or who can operate confidently across Node/TypeScript ecosystems, are absolutely encouraged to apply.

What matters most is architectural depth, SaaS scalability experience, and strong engineering principles.

The Role

This is ideal for someone who has progressed from hands-on engineering into architecture and still understands what great code and great systems look like.

You’ll:

  • Design large-scale, high-performance SaaS architectures
  • Lead microservices and event-driven design initiatives
  • Champion DevOps-aligned architecture patterns
  • Work across distributed/offshore teams
  • Operate comfortably at both strategic and deep technical levels
  • Influence AI architecture and modern data practices

What We’re Looking For

  • 3-5+ years in a Software Architect role
  • Strong engineering background (C#/.NET or modern JS/TS stacks)
  • Experience within mature B2B SaaS environments
  • Deep knowledge of cloud architecture (ideally AWS)
  • Experience with microservices, event-driven systems
  • Strong understanding of OLAP, OLTP, ETL & data warehousing
  • DevOps-first mindset
  • Excellent stakeholder engagement skills

Interested?

If you’re an Architect who wants real influence in a scaling SaaS environment - without being boxed into one technology - this is a strong opportunity.

Apply now or contact us for a confidential discussion: (url removed)

Spectrum IT Recruitment (South) Limited is acting as an Employment Agency in relation to this vacancy.

Technical Architect
Michael Page
Berkshire
Hybrid
Senior - Leader
£90,000 - £100,000

Our client is a Technology SaaS business with a focus on AI and they are looking for a Technical Architect to join their team with a focus on Enterprise, Large scale applications. Their Head Office is in Reading and this is a hybrid role with 2 to 3 days in the office.

Client Details

Our client is a Technology SaaS business with a focus on AI and they are looking for a Technical Architect to join their team with a focus on Enterprise, Large scale applications. Their Head Office is in Reading and this is a hybrid role with 2 to 3 days in the office.

Description

  • Develop and design technical architectures tailored to client needs.
  • Work directly with clients.
  • Work alongside Security and Infrastructure Architects
  • Collaborate with stakeholders to gather and analyse technical requirements.
  • Provide technical guidance and mentorship to development teams.
  • Ensure solutions align with industry standards and best practices.
  • Oversee the implementation of complex technical solutions.
  • Develop documentation for technical processes and system designs.
  • Evaluate and recommend new technologies to enhance business operations.
  • Work closely with project teams to ensure successful delivery.

Profile

Must haves:

  • Currently in an Architect role
  • From a Developer background - C#
  • Azure
  • Worked with large data sets and on large scale, complex applications
  • Expertise in high quality documentation, technical specifications, proposals etc
  • Strong client facing skills
  • Interest in AI

Nice to haves:

  • M365
  • SharePoint
  • Infrastructure and Security knowledge

Job Offer

  • 25 days + BHS
  • Pension
  • Health Insurance
  • Life assurance 4 x salary
  • On site parking
  • Bonus
Senior .Net Developer - Remote - UK Based Only
Morris Sinclair Recruitment
London
Fully remote
Senior
£70,000 - £100,000

Candidates must be based in UK and eligible to work in UK.

Remote-Friendly Software Development Opportunity in Agricultural Technology
Join an award-winning agricultural analytics software company at the forefront of sustainable technology. We’re seeking exceptional Back-End Developers who can transform data into impactful solutions that enhance food production, farm economics, and environmental resilience.

Position Highlights:

  • Remote Work
  • London based head office
  • Cutting-Edge Agricultural Technology Platform
  • Opportunity to Drive Sustainability through Innovative Software Solutions

Candidate Assessment Process:

  • LeetCode-Style Coding Challenge
  • Designed to evaluate algorithmic problem-solving skills
  • Focus on efficient, optimised solutions
  • Challenges will test:
  • Data Structures
  • Algorithm Design
  • Computational Thinking
  • Performance Optimisation

Ideal Candidate Profile:
Academic and Professional Requirements:

  • Ideally PhD graduate but minimum qualification: Degree/Masters in Computing, Computer / Data Science, or Equivalent
  • Proven Commercial Experience as a Back-End Microsoft Developer
  • Strong Academic Background with Demonstrable Achievements
  • Proven ability to excel in time-constrained, algorithmic problem-solving

Technical Expertise:

  • Advanced Proficiency in:
  • C# and .NET Framework
  • Microsoft Azure Cloud Platform
  • SQL and SQL Server
  • Complex Data-Driven Software Development
  • Strong Algorithm and Data Structure Knowledge

Preferred Background:

  • Experience in FinTech or Similar Structured Data Environments
  • Demonstrated Ability to Scale Applications for Large User Base
  • Previous success in technical coding assessments

Personal Attributes:

  • Exceptional Attention to Detail
  • Strong Collaborative and Communication Skills
  • Creative Problem-Solving Approach
  • Quick Analytical Thinking
  • Ability to perform under time pressure
  • Passion for Technological Innovation in Sustainability

What We Offer:

  • Work with Respected Professionals
  • Cutting-Edge Technology Solutions
  • Meaningful Impact on Agricultural Sustainability
  • Opportunity to Develop Market-Leading Software
  • On top of the very competitive salary all employees are included in the company share scheme
C# Software Engineer
Matchtech
Gloucester
In office
Mid
£65/hour
+2

Location: Stevenage OR Bristol (fully onsite)

Duration: 12 month contract

Rate: 65ph UMB (Inside IR35)

Role details:
Our client, a leading consultancy in the defence and aerospace sector, is currently seeking a C# Software Engineer to join their dynamic team. This is a contract position available in either Stevenage or Bristol, with an initial duration of 12 months and the potential for extension.

Key Responsibilities:

  • The role supports the development of the world’s most advanced defence systems from concept through to in-service support and training, utilising a range of simulation technologies such as digital twins and emulators.
  • Collaborating with Project Leads and Simulation Architects, you will design and develop simulation components representing an end-to-end weapon system in a synthetic environment using C#, C++, and integration simulations, adhering to industry standards.
  • You will be a part of a heterogeneous agile development team consisting of engineers from various disciplines working together to develop simulations and representations of real equipment.

Their approach to software development includes:

  • Configuration control
  • Continuous Integration
  • Continuous Delivery or Deployment
  • Unit testing and test-driven development

Job Requirements:

  • Proficient in C# and C++
  • Experience with Microsoft Visual Studio and Eclipse
  • Ability to transition from high-level system views to technical details
  • Excellent verbal, presentation, and written communication skills
  • Knowledge of Microsoft Windows and Linux operating systems

Desirable Skills:

  • Experience with distributed simulation standards/protocols such as DIS, HLA, and DDS, as well as web services development using JavaScript, Node.js, or similar
  • Familiarity with military communications, datalinks, and interfaces such as 1553/1760 and Ethernet TCP/IP
  • Practical knowledge of system integration principles and processes
  • Experience with hardware integration

If you are a skilled C# Software Engineer with a background in defence and aerospace and looking for a new contract opportunity, we encourage you to apply now to join our client’s innovative team in Stevenage or Bristol.

Frequently asked questions
Haystack features a wide variety of C# job opportunities, including positions for junior developers, senior software engineers, full-stack developers, backend developers, and specialized roles in areas like gaming, finance, and enterprise software.
Most C# jobs on Haystack require knowledge of the .NET framework or .NET Core, as they are commonly used alongside C#. However, job requirements vary, so be sure to read each posting carefully.
Yes, Haystack offers numerous remote C# job listings. You can filter your job search to show remote opportunities specifically.
To improve your chances, ensure your resume highlights your C# projects and relevant experience, familiarize yourself with common frameworks like ASP.NET, LINQ, and Entity Framework, contribute to open-source C# projects, and prepare for technical interviews focusing on C# concepts and problem-solving.
Yes, job seekers can create profiles, search, and apply to C# jobs on Haystack completely free of charge.