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Find top CONTRACT Full Stack Engineer jobs with Haystack – your go-to IT job board for flexible, high-paying contract roles. Explore the latest opportunities for skilled full stack engineers ready to tackle front-end and back-end development projects. Start your contract career today!
Software Developer
Bowerford Associates
Exeter
Hybrid
Mid - Senior
£42,000/day - £55,000/day
RECENTLY POSTED
+2

I am searching for a number of experienced C# / .NET Software Developers who can use their development skills and expertise to produce high quality, innovative solutions for a wide range of customers. You will work openly and collaboratively with a diverse range of technical and subject matter experts within the technology department and throughout the whole business. Please note, these roles are offered on a hybrid-working basis. These are NOT remote positions, and you are required in the office two (2 days) per week. Therefore, you MUST live within a commutable distance of Exeter, Devon, or you will be able to relocate to the area in order to be considered for the roles. In this role you will be responsible be: - Using Agile methodologies for the design, development and acceptance of software solutions. Working collaboratively with the Product Owner to understand the customer requirements and gain an understanding of implementation to inform solution scoping. You will perform critical assessments, challenge assumptions and identify most appropriate acceptance criteria that mitigate potential risk. You will be responsible for requirements analysis, scoping, specification definition, data analysis and project management as required to meet the needs of the solutions. Creating production code and performing code reviews with the team, you will be equally comfortable working alone or in pairs or mob. Please note - experience of pair programming or mob programming is not required to be considered for the role but you MUST be open and prepared to work this way as TDD and pairing accounts for 85% of the day! You will comprehend and use established design patterns and best practices, taking responsibility and holding self to account for high quality and maximal efficiency of deliverables. You will be eager to learn and research solutions and share findings with others, playing an active, positive collaborative role with colleagues and customers. You will be utilising AI implementing software development using AI agentic to enhance productivity and efficiency through intelligent task management, seamless communication, and adaptive learning. Please note, AI is used as a tool but not for coding purposes. Integrate sustainable practices into software development processes to minimise environmental impact, enhance resource efficiency, and promote long-term sustainability.To be a success in this role you require in-depth commercial experience in the following key areas: - Analysis and Design C# MVC .NET framework SOLID Principles A desire to work in a Pair Programming / Mob Programming environment. TSQL / SQL Test Automation TDD Refactoring Unit Testing / Mocking JavaScript frameworks such as React (or similar) Experience with using ORM (e.g. Entity Framework) Agile & Scrum development methodologies Able to present self verbally in a presentation or meeting situation. We are looking to speak with candidates who are good communicators, both verbal and written, candidates who can communicate with external stakeholders and internal team members, for example, during agile ceremonies. You will ideally be Educated to University standard with an IT-related degree. Any experience with BDD, DDD, PowerShell, Azure / AWS and using agentic AI environments, i.e. Cline, Copilot, Gemini, is highly desirable. The role comes with an excellent benefits package including, 25 days holiday + bank holidays, ability to purchase extra holidays, bonus scheme, life assurance, flexible Health cash-back scheme, health and wellbeing allowance, health insurance with long-term sickness, electric car scheme, cycle to work scheme, enhanced maternity/paternity, flexible working, excellent company culture, training and education opportunities, free car parking, values-led business and much more! KEYWORDS Analysis and Design, C#, MVC, .NET framework, SOLID Principles, Pair Programming / Mob Programming, TSQL, SQL, Test Automation, TDD, Refactoring, Unit Testing, Mocking, JavaScript Frameworks, React or similar, ORM, Entity Framework, Agile, Scrum. Please note, to be considered for this opportunity you MUST have the Right to Work in the UK long-term without company sponsorship as our client is not looking to sponsor candidates for these vacancies. Please note that due to a high level of applications, we can only respond to applicants whose skills and 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. Bowerford Associates Ltd is acting as an Employment Agency in relation to this vacancy

Full Stack Developer
VANLOQ LIMITED
Glasgow
Hybrid
Mid - Senior
Private salary

JobTitle:FullStackDeveloper

ContractLength:6months(initial)

Location:GlasgowHybrid(3daysperweekonsite)

Sector:FinancialServices

IR35Status:InsideIR35

Overview

WeareworkingwithaleadingfinancialservicesclientwhoisseekinganexperiencedFullStackDevelopertojointheirtechnologyteamonaninitial6-monthcontract.Thisroleoffersahybridworkingmodel,withthreedaysperweekrequiredonsiteinGlasgow.

Youllbepartofamodernengineeringteamdeliveringscalable,cloud-basedsolutions,workingacrossbothbackendandfrontendtechnologiesinadistributeddata-drivenenvironment.

KeyResponsibilities

  • Design,develop,andmaintainfullstackapplicationsinafinancialservicesenvironment
  • BuildandenhancebackendservicesusingJavaand/orScala
  • Developmodern,responsiveuserinterfacesusingAngularorsimilarframeworks
  • Workwithdistributedcomputeanddataprocessingtechnologies
  • Contributetocloud-nativesolutionshostedonAzure
  • Collaboratewithcross-functionalteamsincludingproductowners,architects,anddataengineers
  • Ensurehighstandardsofcodequality,performance,andsecurity

RequiredSkills&Experience

  • StrongFullStackdevelopmentexperience
  • BackenddevelopmentwithJavaand/orScala
  • FrontenddevelopmentusingAngularorasimilarmodernJavaScriptframework
  • Experiencewithdistributedcomputeconceptsandtoolssuchas:
  • ApacheSpark
  • Databricks
  • ApacheBeam(orsimilar)
  • SolidexperiencewithAzurecloudtechnologies
  • Databaseexperiencewithcloudandrelationaldatabases,e.g.Snowflake,Sybase,orsimilar
  • GoodworkingknowledgeofUnix/Linuxenvironments

NicetoHave

  • Experienceworkingwithinfinancialservicesorregulatedenvironments
  • FamiliaritywithCI/CDpipelinesandDevOpspractices
  • Exposuretolarge-scaledataplatformsoranalyticssystems

WhatsonOffer

  • CompetitiveinsideIR35dayrate
  • Hybridworkingwithastrongon-siteengineeringculture
  • Opportunitytoworkoncomplex,enterprise-scalesystems
  • Initial6-monthcontractwithpotentialforextension

IfyoureaFullStackDeveloperwithstrongbackend,frontend,andcloudexperiencelookingforyournextcontractroleinGlasgow,wedlovetohearfromyou.

Senior Outlook Add-in Developer
Oscar Associates Limited
Multiple locations
Hybrid
Senior
£500/day - £550/day

Senior Outlook Add in Developer | £500-£550p/day (Inside IR35) | London (Hybrid, 2/3 days in office) | 10 month contract

Our client is looking for a experienced Outlook Add-in Developer to help support add-in solutions within a enterprise scale messaging environments. The focus of the role will be building robust, cross platform Outlook add-ins that perform across Windows, macOS, web and mobile clients.

It’ll be an exchange landscape that’s both on-premises infrastructure and Microsoft 365, where you will collaborate closely with engineering, product and operations teams in an agile delivery model.

What you’ll be doing:

  • Architecting, developing, and enhancing Outlook add-ins using modern Microsoft frameworks and tools
  • Ensuring add-ins deliver a consistent experience across all Outlook clients, including desktop, browser, and mobile
  • Connecting add-ins to backend systems, APIs, and identity services such as Microsoft Graph and Azure Active Directory
  • You’ll be working closely with product owners, architects, QA, and operations
  • Maintaining compatibility across Exchange on-premises and Exchange Online deployments
  • Producing and maintaining technical documentation, design guidelines, and development standards

What we’re looking for:

  • You can demonstrate experience delivering Outlook add-ins within enterprise environments
  • Strong hands on skills with Office.js, JavaScript or TypeScript, HTML, and CSS
  • Deep understanding of Microsoft 365, Exchange Online, and the behavioral differences between Outlook clients
  • Experience integrating with Microsoft Graph, RESTful APIs, and modern authentication methods (OAuth / Azure AD)

Nice to have:

  • Exposure to CI/CD pipelines, Git-based version control, and automated testing practices
  • Experience with Azure services such as App Services, Functions, Storage, or Key Vault

Candidates will be required to go through background checks before commencing contract.

Must be eligible to live and work in the specified work location . Some occasional travel maybe required. Only successful candidates will be contacted.

EQUAL OPPORTUNITIES Our client is committed to equal opportunities and actively seeks applications from all sectors of the community irrespective of sex, race, colour, nationality, ethnic or national origin, disability, marital status, sexual orientation, having responsibility for dependents, age, religion/beliefs, or any other reason which cannot be shown to be justified

If this sounds like a good fit, apply now!

Senior Outlook Add in Developer | £500-£550p/day (Inside IR35) | London (Hybrid, 2/3 days in office) | 10 month contract

Oscar Associates (UK) Limited is acting as an Employment Business 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.

Java Software Developer
Line Up Aviation
Portsmouth
In office
Mid
£55/hour
+1

On behalf of our client, we are seeking to recruit a Java Software Developer on an initial 12-month contract. As the Java Software Developer, you shall contribute to all stages of the software development lifecycle and thus have solid experience in design (particularly using UML), development (particularly using Java technologies) and test. The developer should have experience of working with microservices. Automated testing is a critical part of the project so any experience of this would be highly beneficial

Role: Java Software Developer
Pay: 55 per hour Via Umbrella
Location: Portsmouth
Contract: Monday - Friday 37 hours per week, 12 months contract
IR35 Status: Inside
Security Clearance: Security Clearance required on submission

Responsibilities

  • Development of code within an agile environment (scrum).
  • Working with the team to design, implement and test features for a new product development.
  • Task estimation in accordance with sprint planning.

Essential Skills:

  • Java Core (version 8+)
  • Spring Boot, Spring Framework - Good knowledge of Developing in Spring with Hibernate
  • Good Knowledge of developing REST within HTTPS
  • Experience of developing within a microservice architecture
  • Web Services using RESTful APIs
  • Distributed systems
  • Knowledge and use of software design patterns
  • Agile Development Processes
  • CI/CD delivery techniques
  • Source code management (we use GIT)
  • Use of Issue tracking systems (such as Jira)
  • UML/SysML using Enterprise Architect or similar
  • Ability to self-motivate and to work well within a team environment.
  • Ability to promote innovation in self and others
  • Ability to interact with internal & external stakeholders in a confident and professional manner

If you are interested in applying for this position and you meet the requirements, please send your updated CV to: Natalie Dalkin at Line Up Aviation

Line Up Aviation has carved its own place in the recruitment of Aviation and Aerospace personnel all over the world for more than 30 years. We work with some of the industry’s best known companies who demand the highest standard of applicants.

" on Twitter for all of our latest vacancies, news and pictures from our busy UK Head Office. Interact with us using the tag at anytime! Thank you for your follow!"

Software Developer
Bowerford Associates Limited
Exeter
Hybrid
Mid - Senior
£42,000/day - £55,000/day
+2

I am searching for a number of experienced C# / .NET Software Developers who can use their development skills and expertise to produce high quality, innovative solutions for a wide range of customers. You will work openly and collaboratively with a diverse range of technical and subject matter experts within the technology department and throughout the whole business. Please note, these roles are offered on a hybrid-working basis. These are NOT remote positions, and you are required in the office two (2 days) per week. Therefore, you MUST live within a commutable distance of Exeter, Devon, or you will be able to relocate to the area in order to be considered for the roles. In this role you will be responsible be: - \* Using Agile methodologies for the design, development and acceptance of software solutions. \* Working collaboratively with the Product Owner to understand the customer requirements and gain an understanding of implementation to inform solution scoping. \* You will perform critical assessments, challenge assumptions and identify most appropriate acceptance criteria that mitigate potential risk. \* You will be responsible for requirements analysis, scoping, specification definition, data analysis and project management as required to meet the needs of the solutions. \* Creating production code and performing code reviews with the team, you will be equally comfortable working alone or in pairs or mob. Please note - experience of pair programming or mob programming is not required to be considered for the role but you MUST be open and prepared to work this way as TDD and pairing accounts for 85% of the day! \* You will comprehend and use established design patterns and best practices, taking responsibility and holding self to account for high quality and maximal efficiency of deliverables. \* You will be eager to learn and research solutions and share findings with others, playing an active, positive collaborative role with colleagues and customers. \* You will be utilising AI implementing software development using AI agentic to enhance productivity and efficiency through intelligent task management, seamless communication, and adaptive learning. Please note, AI is used as a tool but not for coding purposes. \* Integrate sustainable practices into software development processes to minimise environmental impact, enhance resource efficiency, and promote long-term sustainability. To be a success in this role you require in-depth commercial experience in the following key areas: - \* Analysis and Design \* C# \* MVC \* .NET framework \* SOLID Principles \* A desire to work in a Pair Programming / Mob Programming environment. \* TSQL / SQL \* Test Automation \* TDD \* Refactoring \* Unit Testing / Mocking \* JavaScript frameworks such as React (or similar) \* Experience with using ORM (e.g. Entity Framework) \* Agile & Scrum development methodologies \* Able to present self verbally in a presentation or meeting situation. We are looking to speak with candidates who are good communicators, both verbal and written, candidates who can communicate with external stakeholders and internal team members, for example, during agile ceremonies. You will ideally be Educated to University standard with an IT-related degree. Any experience with BDD, DDD, PowerShell, Azure / AWS and using agentic AI environments, i.e. Cline, Copilot, Gemini, is highly desirable. The role comes with an excellent benefits package including, 25 days holiday + bank holidays, ability to purchase extra holidays, bonus scheme, life assurance, flexible Health cash-back scheme, health and wellbeing allowance, health insurance with long-term sickness, electric car scheme, cycle to work scheme, enhanced maternity/paternity, flexible working, excellent company culture, training and education opportunities, free car parking, values-led business and much more! KEYWORDS Analysis and Design, C#, MVC, .NET framework, SOLID Principles, Pair Programming / Mob Programming, TSQL, SQL, Test Automation, TDD, Refactoring, Unit Testing, Mocking, JavaScript Frameworks, React or similar, ORM, Entity Framework, Agile, Scrum. Please note, to be considered for this opportunity you MUST have the Right to Work in the UK long-term without company sponsorship as our client is not looking to sponsor candidates for these vacancies. Please note that due to a high level of applications, we can only respond to applicants whose skills and 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. Bowerford Associates Ltd is acting as an Employment Agency in relation to this vacancy.

Spotlight
Software Engineer (contract)
Opencast
Multiple locations
Hybrid
Mid
£350/day - £450/day
+4

Ready to work somewhere that cares more about how you build software than how fast you can ship it? At Opencast, we don’t measure developers by the number of tickets you complete. We care about engineering craft, clean design and thoughtful problem-solving. Opencast consultants deliver in complex environments, pairing often and working with others who take pride in doing things properly: TDD, emerging design, refactoring and leaving code better than they found it. We build software we are proud of, and our clients trust us not just to code but to think, challenge and guide. If you value simple and robust solutions and want a role where your judgment matters as much as your keyboard, you will fit right in. The role We’re looking for Contractors in Software Development (consultant level) to help our major clients transform. Software developers at Opencast care about building products right and combine their own experience and approach with our company values. They are tech agnostic, have expertise in agile methodologies, extreme programming practices and use industry-leading programming languages to deliver agile transformation. Our approach to software development is collaborative, focused on keeping things simple, and we use test driven development and pair programming as best practice. Working with clients and key stakeholders is a crucial part of a consultancy role. Our developers are inclusive team players that listen, collaborate, can positively challenge and manage expectations when needed but most of all are always willing to teach and help others. Leaving a client with improved ways of working, working technology and a good experience from discovery through to live is the priority. Contractors at Opencast follow the same principles as permanent consultants. The roles are varied, technical, and never confined to any one provider or solution. Requirements Due to the nature of this role, applicants must either currently hold active Security Check (SC) Clearance or be eligible to obtain it. Eligibility typically requires UK citizenship and continuous residence in the UK for the past five years, with no single absence exceeding 28 consecutive days. As attendance at client sites is a routine part of the role’s working pattern and involves occasional travel, travel expenses are not covered. Experience in delivering digital services for the UK government is highly valuable for many of our projects. Therefore, familiarity with the GDS toolkit will be beneficial. Technical Skills - Expertise in Java and/or Scala is required - Experience with Javascript, Typescript, Kotlin, Python or Ruby is also valuable - Understanding of Object Oriented Programming - In depth knowledge of concepts and uses of testing - Knowledge or experience of delivering complex services to Government Digital Service (GDS) standards - Being comfortable with new technology, t-shaped and comfortable with ongoing learning and development is key to success - Experience with agile methodology A contractor in software development at Opencast is responsible for: - Delivering in the upkeep of their team’s backlog - Collaborating with the teams testing effort - Leading on the implementation of user stories - Embracing mobbing and pairing - Working with others in a collaborative, multi-disciplinary environment Salary Up to £450 per day (working inside IR35) Where you’ll work This role requires regular on-site attendance across our HQ, hub offices, client sites and home. Applicants must be able to commute to offices and client sites as part of their normal working arrangements, as travel is essential to fulfilling the responsibilities of the role. We include you We welcome candidates from all identities, attributes, ways of thinking and backgrounds to thrive in a career at Opencast. Our aim is for the diversity of our people to be reflected in the solutions we deliver, to help create a fairer society for all. Interview Interviews will be conducted via Microsoft Teams. We’re happy to make adjustments to support your needs. Want to know more? Visit our website for more details.

Spotlight
Senior Software Engineer (contract)
Opencast
Multiple locations
Hybrid
Senior
£450/day - £600/day
+4

Ready to work somewhere that cares more about how you build software than how fast you can ship it? At Opencast, we don’t measure developers by the number of tickets you complete. We care about engineering craft, clean design and thoughtful problem-solving. Opencast consultants deliver in complex environments, pairing often and working with others who take pride in doing things properly: TDD, emerging design, refactoring and leaving code better than they found it. We build software we are proud of, and our clients trust us not just to code but to think, challenge and guide. If you value simple and robust solutions and want a role where your judgment matters as much as your keyboard, you will fit right in. The role We’re looking for Contractors in Software Development (Senior level or Technical Lead) to help our major clients transform. Software developers at Opencast care about building products right and combine their own experience and approach with our company values. They are tech agnostic, have expertise in agile methodologies, extreme programming practices and use industry-leading programming languages to deliver agile transformation. Our approach to software development is collaborative, focused on keeping things simple, and we use test driven development and pair programming as best practice. Working with clients and key stakeholders is a crucial part of a consultancy role. Our developers are inclusive team players that listen, collaborate, can positively challenge and manage expectations when needed but most of all are always willing to teach and help others. Leaving a client with improved ways of working, working technology and a good experience from discovery through to live is the priority. Contractors at Opencast follow the same principles as permanent consultants. The roles are varied, technical, and never confined to any one provider or solution. Requirements Due to the nature of this role, applicants must either currently hold active Security Check (SC) Clearance or be eligible to obtain it. Eligibility typically requires UK citizenship and continuous residence in the UK for the past five years, with no single absence exceeding 28 consecutive days. As attendance at client sites is a routine part of the role’s working pattern and involves occasional travel, travel expenses are not covered. Experience in delivering digital services for the UK government is highly valuable for many of our projects. Therefore, familiarity with the GDS toolkit will be beneficial. Technical Skills - Expertise in Java and/or Scala is required - Experience in other languages such as Javascript, Typescript, Kotlin, Python or Ruby is also valuable - Experience in a technical leadership role - Deep understanding of programming paradigm, code design, testing, accessibility, performance and security - Proven ability to apply different testing tools and methods in practice - Knowledge or experience of delivering complex services to Government Digital Service (GDS) standards - Being comfortable with new technology, t-shaped and comfortable with ongoing learning and development is key to success - Experience with agile methodology A senior level contractor in software development at Opencast is responsible for: - Driving the elaboration of their team’s backlog - Setting testing strategies to match industry standards - Being a technical expert in their team (or acting as the team lead) - Leading the technical representation in a project discovery - Acting as a technical lead in the team, enabling them to achieve their full potential Salary £450 - £600 per day (working inside IR35) Where you’ll work This role requires regular on-site attendance across our HQ, hub offices, client sites and home. Applicants must be able to commute to offices and client sites as part of their normal working arrangements, as travel is essential to fulfilling the responsibilities of the role. We include you We welcome candidates from all identities, attributes, ways of thinking and backgrounds to thrive in a career at Opencast. Our aim is for the diversity of our people to be reflected in the solutions we deliver, to help create a fairer society for all. Interview Interviews will be conducted via Microsoft Teams. We’re happy to make adjustments to support your needs. Want to know more? Visit our website for more details.

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Frequently asked questions
A contract Full Stack Engineer is a software developer hired on a temporary basis to work on both frontend and backend aspects of web applications. These roles are project-based or time-limited, offering flexibility and focused expertise.
Contract durations vary widely but commonly range from 3 to 12 months. Some contracts may extend or renew based on project needs and performance.
Proficiency in both frontend frameworks (like React, Angular, or Vue.js) and backend technologies (such as Node.js, Python, Java, or Ruby) is essential. Familiarity with databases, APIs, and version control is also important.
Contract roles can be remote, on-site, or hybrid depending on the employer’s requirements. Many companies now offer flexible remote contract opportunities.
You can browse available contract Full Stack Engineer positions on our platform, create a profile, upload your resume, and apply directly through each job listing. Setting up job alerts helps you stay updated on new contracts.