CONTRACT Backend Engineer Jobs

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CONTRACT Backend Engineer Jobs

Overview

Discover top contract Backend Engineer jobs on Haystack, the leading IT job board connecting skilled developers with exciting short-term opportunities. Whether you specialize in Java, Python, Node.js, or other backend technologies, find flexible contract roles that match your expertise and advance your career today. Start your search for the best Backend Engineer contract jobs now!

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Integration Engineer

Charles Simon Associates Ltd

Location not specified

Integration Engineer (Healthcare, HL7, FHIR, Cloverleaf, APIs, Java, Python, JavaScript) Contract Remote

Charles Simon Associates are exclusively recruiting for an Integration Engineer on an initial 3-month contract with the potential to extend.

Location: Remote

Day Rate: £450 £550 per day

Inside IR35

Start Date: Ideally W/C 29th September

Role Overview:

We are looking for a skilled Integration Engineer to support and develop integrations between healthcare systems and third-party applications. This is an exciting opportunity to work with cutting-edge interoperability technologies and contribute to improving healthcare workflows.

Key Responsibilities:

Develop, test, and support integrations between healthcare applications and third-party systems.

Configure and maintain integration engines (Mirth Connect, Rhapsody, Cloverleaf, InterSystems Ensemble, or equivalent).

Map and transform HL7 v2.x messages (e.g., ADT, ORM, ORU) and support HL7 v3.

Build and maintain modern FHIR-based RESTful APIs for healthcare data exchange.

Troubleshoot, monitor, and optimise live interfaces in production environments.

Collaborate with clinicians, vendors, and IT teams to gather requirements and translate them into technical solutions.

Document integration designs, workflows, and support processes.

Required Skills & Experience:

Strong knowledge of HL7 v2.x, HL7 v3, and FHIR interoperability standards.

Hands-on experience with integration engines such as Mirth Connect, Rhapsody, Cloverleaf, or InterSystems Ensemble.

Proficiency in Java, JavaScript, Python, or C#/.NET for scripting and interface development.

Experience designing and consuming REST/SOAP APIs (JSON, XML).

Solid understanding of healthcare workflows and clinical systems (Epic, Cerner, Meditech, EMIS, SystemOne, or equivalent).

Strong SQL/database skills for data transformation and troubleshooting.

Familiarity with healthcare data security protocols and compliance frameworks.

Integration Engineer (Healthcare, HL7, FHIR, Cloverleaf, APIs, Java, Python, JavaScript) Contract Remote

Integration Engineer

Charles Simon Associates Ltd

Location not specified

Integration Engineer (Healthcare, HL7, FHIR, Cloverleaf, APIs, Java, Python, JavaScript) Contract Remote

Charles Simon Associates are exclusively recruiting for an Integration Engineer on an initial 3-month contract with the potential to extend.

Location: Remote

Day Rate: £450 £550 per day

Inside IR35

Start Date: Ideally W/C 29th September

Role Overview:

Key Responsibilities:

Develop, test, and support integrations between healthcare applications and third-party systems.

Configure and maintain integration engines (Mirth Connect, Rhapsody, Cloverleaf, InterSystems Ensemble, or equivalent).

Map and transform HL7 v2.x messages (e.g., ADT, ORM, ORU) and support HL7 v3.

Build and maintain modern FHIR-based RESTful APIs for healthcare data exchange.

Troubleshoot, monitor, and optimise live interfaces in production environments.

Collaborate with clinicians, vendors, and IT teams to gather requirements and translate them into technical solutions.

Document integration designs, workflows, and support processes.

Required Skills & Experience:

Strong knowledge of HL7 v2.x, HL7 v3, and FHIR interoperability standards.

Hands-on experience with integration engines such as Mirth Connect, Rhapsody, Cloverleaf, or InterSystems Ensemble.

Proficiency in Java, JavaScript, Python, or C#/.NET for scripting and interface development.

Experience designing and consuming REST/SOAP APIs (JSON, XML).

Solid understanding of healthcare workflows and clinical systems (Epic, Cerner, Meditech, EMIS, SystemOne, or equivalent).

Strong SQL/database skills for data transformation and troubleshooting.

Familiarity with healthcare data security protocols and compliance frameworks.

Integration Engineer (Healthcare, HL7, FHIR, Cloverleaf, APIs, Java, Python, JavaScript) Contract Remote

Integration Engineer

Charles Simon Associates Ltd

Location not specified

Integration Engineer (Healthcare, HL7, FHIR, Cloverleaf, APIs, Java, Python, JavaScript) Contract Remote

Charles Simon Associates are exclusively recruiting for an Integration Engineer on an initial 3-month contract with the potential to extend.

Location: Remote

Day Rate: £450 £550 per day

Inside IR35

Start Date: Ideally W/C 29th September

Role Overview:

Key Responsibilities:

Develop, test, and support integrations between healthcare applications and third-party systems.

Configure and maintain integration engines (Mirth Connect, Rhapsody, Cloverleaf, InterSystems Ensemble, or equivalent).

Map and transform HL7 v2.x messages (e.g., ADT, ORM, ORU) and support HL7 v3.

Build and maintain modern FHIR-based RESTful APIs for healthcare data exchange.

Troubleshoot, monitor, and optimise live interfaces in production environments.

Collaborate with clinicians, vendors, and IT teams to gather requirements and translate them into technical solutions.

Document integration designs, workflows, and support processes.

Required Skills & Experience:

Strong knowledge of HL7 v2.x, HL7 v3, and FHIR interoperability standards.

Hands-on experience with integration engines such as Mirth Connect, Rhapsody, Cloverleaf, or InterSystems Ensemble.

Proficiency in Java, JavaScript, Python, or C#/.NET for scripting and interface development.

Experience designing and consuming REST/SOAP APIs (JSON, XML).

Solid understanding of healthcare workflows and clinical systems (Epic, Cerner, Meditech, EMIS, SystemOne, or equivalent).

Strong SQL/database skills for data transformation and troubleshooting.

Familiarity with healthcare data security protocols and compliance frameworks.

Integration Engineer (Healthcare, HL7, FHIR, Cloverleaf, APIs, Java, Python, JavaScript) Contract Remote

Integration Engineer

Charles Simon Associates Ltd

Location not specified

Integration Engineer (Healthcare, HL7, FHIR, Cloverleaf, APIs, Java, Python, JavaScript) Contract Remote

Charles Simon Associates are exclusively recruiting for an Integration Engineer on an initial 3-month contract with the potential to extend.

Location: Remote

Day Rate: £450 £550 per day

Inside IR35

Start Date: Ideally W/C 29th September

Role Overview:

Key Responsibilities:

Develop, test, and support integrations between healthcare applications and third-party systems.

Configure and maintain integration engines (Mirth Connect, Rhapsody, Cloverleaf, InterSystems Ensemble, or equivalent).

Map and transform HL7 v2.x messages (e.g., ADT, ORM, ORU) and support HL7 v3.

Build and maintain modern FHIR-based RESTful APIs for healthcare data exchange.

Troubleshoot, monitor, and optimise live interfaces in production environments.

Collaborate with clinicians, vendors, and IT teams to gather requirements and translate them into technical solutions.

Document integration designs, workflows, and support processes.

Required Skills & Experience:

Strong knowledge of HL7 v2.x, HL7 v3, and FHIR interoperability standards.

Hands-on experience with integration engines such as Mirth Connect, Rhapsody, Cloverleaf, or InterSystems Ensemble.

Proficiency in Java, JavaScript, Python, or C#/.NET for scripting and interface development.

Experience designing and consuming REST/SOAP APIs (JSON, XML).

Solid understanding of healthcare workflows and clinical systems (Epic, Cerner, Meditech, EMIS, SystemOne, or equivalent).

Strong SQL/database skills for data transformation and troubleshooting.

Familiarity with healthcare data security protocols and compliance frameworks.

Integration Engineer (Healthcare, HL7, FHIR, Cloverleaf, APIs, Java, Python, JavaScript) Contract Remote

Applications Developer

Job Role: Application Developer (MERN)

Job Type: Contract

Industry: FMCG

Location: Winchester, Hybrid

Rate: £ 400/day to £500/day (Outside IR35)

Profile Application Developer

Our client is a leading figurehead in the UK food sector, with an unparalleled pedigree dating back to the early 18th century.

Job Role Application Developer

The Application Developer utilising the MERN stack, will be responsible for developing web applications. Your role involves working with Public Cloud (AWS) services to enhance applications.

Duties Application Developer

• Test applications for performance and functionality.

• Collaborate with other developers on projects and work alongside development members and business partners to develop microservices.

• Drive the development of web applications using the MERN stack.

Experience - Application Developer

• Advanced skills in JavaScript (NodeJS ES6) technologies.

• Senior development experience using MERN framework for web application development.

• Unit with React Testing Library / Jest and E2E test automation with Cypress

• Experience in refactoring legacy applications into modern, scalable, and maintainable solutions

• Release procedures, coding design and documentation

Candidates who are currently an Application Developer, Software Engineer, Software Developer, Web Developer, Application Engineer and IT Software Engineer could be suitable for this role.

To make an application for this role please submit your CV to (url removed) or for more information call (phone number removed).

For details of other opportunities available within your chose field please visit our website (url removed)

Omega is an employment agency specialising in opportunities at all levels within the Engineering, Manufacturing, Aerospace, Automotive, Electronics, Defence, Scientific, Energy & Renewables and Tech sectors.

Principal Software Engineer

Location: Southampton (onsite requirements vary depending on project demands - more detail below)

Duration: 6 month contract

Rate: 64.22ph UMB (Inside IR35)

Role details:

Our client, a prominent player in the Defence & Security sector, is seeking a Principal Software Engineer for a contract position in Southampton. This opportunity involves working on innovative software solutions for integrated sensors and protection systems, requiring both on-site and flexible working arrangements.

Key Responsibilities:

Developing bare metal embedded C++ software

Working with embedded interfaces such as CAN bus, I2C, SPI, GPIO

Employing tools and approaches specific to embedded development

Collaborating on-site in Southampton 1-4 days a week, with flexibility depending on project needs

Maintaining SC clearance or the ability to obtain it for UK eyes-only projects

Job Requirements:

Experience with Software Engineering, Embedded C/C++, and Linux

Proficiency in UML and embedded Linux

Hands-on experience with bare metal embedded C++ software development

Familiarity with embedded interfaces and development tools

Ability to work both on-site in Southampton and remotely as required

Eligibility for SC clearance to work on specific projects

Desirable Skills:

C# application development

Experience with developing Windows & Linux applications

Understanding of software lifecycle processes

Familiarity with configuration management tools like git

Software design experience with SysML / UML

Experience in developing test cases and procedures

Experience with iterative development lifecycles such as tailored Agile

Proficiency with tools associated with iterative development like Jira and DevOps

Knowledge of Docker, virtual machines, and CI tools like Jenkins

If you are a Principal Software Engineer looking to contribute to pioneering software developments in the Defence & Security sector, we encourage you to apply now for this contract opportunity in Southampton.

Digital Java Developer Lead

Computer Futures are looking for an exceptional Digital Java Developer Lead to join our public sector client, who manages some of the UK’s most critical public services.

This is a unique opportunity to lead the development of digital products that directly impact millions of lives. You’ll be part of a major transformation programme, helping to modernise our technology landscape and deliver secure, scalable, and user-focused services.

As a Technical Lead, you will:

Set the technical direction for your service or capability, aligned with wider strategic goals

Lead and mentor a team of engineers, fostering a culture of technical excellence and continuous improvement

Ensure delivery of high-quality, secure, and assured digital services

Promote best practices in software engineering and cloud infrastructure

Collaborate across disciplines and departments to ensure alignment and shared understanding

Assess and manage the impact of technical changes across systems and teams

Champion innovation and drive forward technical evolution within the organisation

You may lead a team focused on:

Developing agent or citizen-facing digital systems

Building shared capabilities that support development, assurance, deployment, and operations.

Essential Skills and Experience

Software engineering (Java, microservices, Hexagonal architecture, MongoDB, Kafka) or cloud infrastructure & DevOps (AWS, Terraform, GitLab CI, Jenkins)

Technical leadership, including team guidance, mentoring, and development

Engineering best practices in secure design, version control, and assurance

Collaboration and knowledge sharing across engineering communities

Delivering in complex environments, working with multidisciplinary teams and stakeholders to meet deadlines.

Security Clearance: BPSS but must be eligible for SC Clearance

Inside IR35: £650 - £750.

Contract Length: 12 Months

Working pattern: 60% in office - Leeds, Manchester OR Newcastle

WebMethods Developer x 2 - SC Cleared

CBSbutler Holdings Limited trading as CBSbutler

WebMethods Developer x 2

6 month contract roles

WebMethods Integration

DevOps Toolset

SC Clearance

Responsibilities

Designing, developing and deploying of IBM (formally Software AG) WebMethods integration packages using WebMethods 10 platform

Working with DevOps toolset for develop and maintain Automated Testing and Code Deployment

Provide Assistance to WebMethods support team to resolve technical issues

Administrating the WebMethods Environment, using Command Central for Deployment of WebMethods Patches, monitor capacity, providing service improvements

Liaise with customers to define project requirements, document and design solutions

Your new company

I’m recruiting for a very well-known and established university based in the heart of London.

Your new role

My client is looking for an experienced MuleSoft Developer to join them on an initial 6-month contract. You’ll be developing, testing, and deploying integration solutions using MuleSoft’s Anypoint Platform whilst collaborating with cross-functional teams to design and implement scalable and robust integration architectures. You’ll create documentation, including technical designs, specifications, and implementation guides along with troubleshooting issues and provide solutions in a timely manner.

What you’ll need to succeed

Core Mulesoft Technologies

Mule 4 and Dataweave 2

Anypoint Platform to include:

Mule 4 Runtime Clusters

Supporting Tools and knowledge

Postman

JSON/XML

Rest APIs

Event APIs (Webhooks)

RAML

SQL

What you need to do now

If you’re interested in this role, click ‘apply now’ to forward an up-to-date copy of your CV, or call us now.

If this job isn’t quite right for you, but you are looking for a new position, please contact us for a confidential discussion about your career.

Hays Specialist Recruitment Limited acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C’s, Privacy Policy and Disclaimers which can be found at (url removed)

ServiceNow Developer

Access Computer Consulting

Location not specified

Remote or hybrid

Mid

£600/day - £700/day

I am recruiting for a ServiceNow Developer to work on a hybrid basis - 2 days in London, 3 days remote.

The role falls inside IR35 so you will be required to work through an umbrella company for the duration of the contract.

Candidates MUST have recently worked in Central Government.

You will be responsible for supporting the development of enterprise workflows and data-driven decisions.

You must have experience with ServiceNow platform: Including modules like ITSM, ITOM, HRSD, CSM, and CMDB.

ServiceNow Scripting: Client Scripts, Business Rules, Script Includes, UI Policies, and UI Actions is also required.

Experience of REST/SOAP API Integration: Building and consuming APIs for third-party integrations.

Knowledge of ServiceNow Workflows: Designing and implementing Flow Designer and legacy Workflow Editor and Service Portal Development: Custom widgets, pages, and themes.

You will be proficient in JavaScript: Core scripting language used in ServiceNow.

Hands-on experience in ServiceNow development and administration and also experience in Agile/Scrum environments and using tools like Jira or Azure DevOps is essential.

Please apply ASAP to discuss further.

Java Developer

Uniting People

Location not specified

In office

Mid

£450/day - £500/day

Urgent Contract Java Developer

Duration - 6 months

Skill set: Java, extJS (older screens), React (some of the newer screens) & Oracle SQL would be the main skillset requirement.

Location: Glasgow based

5 days a week onsite is mandatory

API Developer - SC Cleared

CBSbutler Holdings Limited trading as CBSbutler

Location not specified

Fully remote

Mid

£650/day - £690/day

API Develoiper - SC Cleared

6 month initial contract

Strong background in API Development - ideally Axway

SC Clearance

WebMethods

Responsibilities

Designing, developing and deploying of Axway policies and containers using Axway Policy Studio v7.7

Working with DevOps toolset for develop and maintain Automated Testing and Code Deployment

Provide Assistance to Axway support team to resolve technical issues

Administrating the Axway Environment, using Axway Policy Studio, Axway API Manager, Cassandra and API Gateway for Deployment of Axway Patches, monitor capacity, providing service improvements

Liaise with customers to define project requirements, document and design solutions

Software Engineering Lead

CBSbutler Holdings Limited trading as CBSbutler

Software Technical Lead

Rate: 500 - 600 a day

Location: Bristol hybrid one day every other week

Duration: 6 months initially

Clearance: SC Clearance required

You will join a global IT consultancy delivering digital transformation to a public sector body.

This is a hands-on leadership role responsible for actively supporting and guiding the team of seven through complex technical challenges.

The role involves breaking down complex tasks into manageable components, delegating effectively, and empowering team members to take ownership of their work.

Key responsibilities include:

Providing clear technical direction and mentorship to the team.

Applying sound judgment to make technical decisions.

Driving improvements in system documentation, team processes, and overall developer experience.

Delivering direct, constructive feedback to foster individual and team growth.

Promoting a collaborative, accountable, and high-performance team culture.

Tech stack:

Node.js, ReactJS, JavaScript, TypeScript, npm, AWS, Jenkins, Terraform, and PostgreSQL.

The client is however open to strong candidates with adjacent skill sets. The technical stack is flexible for the right person.

Controls System Engineer - Contract

Controls System Engineer 6 Month Contract 55- 65ph Buckinghamshire

Organisation Overview

Our client, a leading advanced technology company, applies the pursuit of excellence from motor sports to solve complex engineering challenges in various industries. Specialising in aerodynamics and high-performance vehicle design, they drive innovation and technological breakthroughs. They offer an exciting and dynamic work environment that values world-class engineering and technological prowess.

Role Summary

Our client is seeking a Controls System Engineer on a contract basis to contribute to the development of control systems and software for projects. This role, plays a crucial part in meeting project requirements, from initial development to testing for production application. Utilising cutting-edge tools like MATLAB/Simulink and dSpace Hardware-In-the-Loop (HIL) rigs, the engineer will prototype control systems while ensuring project ownership and performance.

Responsibilities

Translate specifications and requirements into functional systems, engaging in physical testing and production applications.

Prototype control systems hardware and software using MATLAB/Simulink and dSpace HIL rigs.

Engage in various software development tasks as necessary, ensuring project functionality and performance.

Essential Skills & Experience

Degree in Control, Software, or Electronic Engineering.

Proficiency in modern control system and software engineering methodologies.

Experience with MATLAB/Simulink for control systems software development.

Familiarity with tools such as C#, Python, Java, or similar for software development.

Knowledge of version control, issues tracking, and software build systems.

Understanding of software development processes and functional safety implications.

Desirable Skills & Experience

Experience with other software development tools.

Exposure to high-performance automotive, aerospace, or related sectors.

If this role is of interest, reply today with an up to date CV and we can discuss further.

Contract Software Engineer / Lead Developer - Expert

We’re looking for an exceptional Software Engineer / Back-End Developer - a true “super dev” - with proven Design Patterns expertise and a deep understanding of software engineering/development. This is a high-level contract role, suitable for someone operating at a Principal Engineer or Lead Engineer level.

You’ll join a small, highly skilled team building a new platform driven by innovative algorithms, clever data structures, and design patterns-based architecture. Working closely with the Head of Architecture, you’ll take abstract concepts and requirements, distil them, and deliver high-quality, elegant solutions.

This is a role for someone who thrives on independence, can work from a high-level brief, and produces results quickly and to the highest standards.

Location: Hybrid - Remote work available. Must be UK-based.

Rate: circa 680 per day (inside IR35)

Duration: 6 months initially

Start: ASAP September 2025

Key Responsibilities

Lead the back-end development of a new platform.

Apply advanced software engineering/ development and design patterns

Translate abstract concepts into working, production-ready solutions.

Employ Test-Driven Development (TDD) and SOLID principles.

Build robust, scalable algorithms and efficient data structures.

Collaborate with other engineers, mentoring and sharing knowledge.

Produce maintainable, clean code based on the “less is more” principle.

Essential Skills & Experience

Expert in TypeScript or a similar software development language , with strong back-end development experience.

Extensive experience in applying well-known software design patterns.

Proven ability to work independently with minimal guidance.

Advanced algorithmic approach and abstract problem-solving capabilities.

Solid understanding of TDD and SOLID principles.

Minimum 5 years’ experience in software development/software engineering

Excellent technical communication skills.

Able to take a concept from discussion to high-quality code delivery.

Desirable

Degree in Computer Science, Software Engineering, or related discipline highly desirable

Experience in high-performance or complex systems.

Familiarity with algorithmic analysis and performance optimisation.

Work Arrangements

Remote: or Hybrid your choice but you must be UK based.

Inside IR35 contract.

If you are a high-calibre developer with the skills above and the ability to deliver complex back-end solutions at speed, we’d love to hear from you.

Services advertised are those of an Employment Business.

C++ Software Engineer

Job Title: C++ Software Engineer

Overview of department:

Our client’s team, at their Bristol facility, develop solutions for the next generation of Air Defence Systems; developing evolving products whilst maintaining our enviable reputation for safety, performance and dependability.

Responsibilities:

This is a very hands-on role and requires the continued design and development of Command and Control architectures, and the instantiations for future products. Perfect for a Software Engineer who is proactive and takes the initiative.

Skillset/experience required:

A strong background in software engineering, its realisation and system wide impact.

Experience of working in C++

Collaborative, open approach to development and have the ability to work well in a team and maintain momentum during development.

Experience of working across the entire software development process from engaging with requirement authorities to automated target integration and proving, supported with effective documentation

Experience of new tools, techniques and approaches that might enable us to evolve our processes to improve our efficiency and sustainability

Experience in other languages such as Ada, QT

Knowledge of DDS middleware and Real Time Operating Systems

Knowledge of standards such as DefStan 00-55, DO-178C or IEC61508 and restricted coding standards such as MISRA C++

Calypso Java Developer - Inside IR35 - London/hybrid

Job Title: Calypso Java Developer

Start Date: As soon as possible

Location: Threadneedle Street, London (4 days per week onsite)

Salary/Rate: Up to £600/day INSIDE IR35

Job Type: 12 month contract - very likely to extend

Company: Global software consulting - joining the financial arm of the business

Responsibilities:

We are looking for a Senior Software Engineers to join the team to work on implementing solutions on expanding/enhancing the trading capabilities of the Calypso platform to support the planned business growth in Europe. As part of our team, you will contribute towards the future strategy and technology direction of our products, implement and maintain high quality code to best practices, take part in capacity planning and design activities, and work with colleagues within FI & Derivatives team and beyond to help deliver best-in-Class systems.

Qualifications:

Undergraduate Degree

Strong Java Developer needs to have experience designing/building distributed applications, JVM tuning, multi-threading

Strong Calypso Experience

Capital Market Knowledge

Trade Management

SQL Knowledge / Oracle DB

Linux (RedHat)

Ability to work a hybrid model

Software Engineer - Azure / .NET Core (Contract)

Location: Remote with occasional day on site

Contract Type: 9-12 months (with potential extension)

Start Date: November 2025

Rate: up to 425/day

IR35: Outside

We’re seeking a Software Engineer to join a project team rebuilding a critical customer-facing application for our client. You’ll be joining a high-performing engineering team working on a greenfield platform, with the opportunity to shape the technical foundations from the ground up in a real roll your sleeves up environment.

This is a hands-on role for someone who thrives in a DevOps-driven environment, is confident working with Azure, and enjoys building resilient, scalable services that power real-world applications.

Key Outcomes

Deliver high-quality backend code in a brand-new greenfield environment.

Ensure backend code is performant, secure, and production ready.

Backend integrates seamlessly with frontend and mobile platforms.

Support continuous improvement and technical excellence across the team.

Skills & Experience

Essential:

Strong hands-on experience with:

C#, .NET Core, SQL

Azure Function Apps, API Manager, App Insights

CI/CD automation (Azure DevOps or equivalent)

Experience working in Agile teams (Scrum/Kanban).

Comfortable working in cross-functional teams across locations.

Strong problem-solving skills and attention to detail.

Passion for quality, scalability, and maintainability.

Apply now or reach out for more details.

Head of Network Automation/Engineering

Summer Browning Associates

Summer-Browning Associates are currently supporting our client, a leading telecommunications provider, who are actively seeking a Head of Automation on an initial 6 month contract. The ideal candidate will be an experienced individual with a software engineering/Development background, Fixed mobile/ b2b experience, experienced leader and a Continuous improvement mindset. An experienced Head of Engineering individual with focus on network automation within telco.

Key Accountabilities

Recruit, develop and lead multiple development squads across internal and external resources

Assess use cases in backlog, estimate MVP and sizing effort to ensure team resources are sized appropriately with the right skills.

Work alongside SA to do strategic use case design and design tactical solution with strategic outcome in mind

LLD, develop and create workflows (when required)

Approve Code reviews before merge (when required)

Internal/External stakeholder engagement (including vendors)

Set standards - coding, ways of working, documentation, for 30+ developers and provide thought leadership to wider development community across NSE etc.

Encourage close loop automation across Plan, Provide & Assure ensuring Automation Silos are broken.

Communicate updates to key stakeholders

Help stakeholders to think strategically

Encourage data-driven decision-making and sprint planning

Work across both fixed and mobile network and create synergies and consolidation where possible

Experience

Multiple years of experience in a senior developer role, ideally in a large Telco or IT company

Experience working in Networks or IT network transformations

Proven track record of delivering high quality code and leading development squads

Key skills

Netconf, API’s, XML, JSON, Jinja 2, Python, JavaScript

Cisco NSO, Ansible, Net Miko, Docker

Workflow automation Itential IAP, Appian, Resolve

Knowledge of telecom networks, technologies, and standards e.g TMF/Tosca/MEF

YANG/TOSCA for service modelling

CI/CD/CT - GITLAB, Robot, Selenium, Cucumber, Veracode, Sonar cube

If you meet the above criteria, please submit your latest CV for review.

Technical Lead - Contract

Tec Partners

Location not specified

Hybrid

Leader

£700/day - £750/day

Contract Technical Lead

Rate: Up to 750 per day (Umbrella Rate, Depending on Experience)

Contract: 12 months

Location: Leeds, Manchester or Newcastle - Hybrid (3 Days Onsite per Week)

Clearance: BPSS required (must be eligible for SC)

About the Role

We are seeking a highly skilled Technical Lead to join a major digital transformation programme within a large-scale public sector environment. This role will focus on leading engineering teams delivering high-profile, citizen-facing systems and shared digital capabilities used nationwide.

As a hands-on technical leader, you will set direction for your team, ensure alignment with wider strategy, and drive the delivery of secure, reliable, and modern digital services. You will also play a key role in transforming legacy systems into scalable, microservice-based solutions.

Key Responsibilities

Lead, mentor, and support a team of engineers.

Set technical direction and influence wider strategy.

Ensure delivery of secure, high-quality, and assured services.

Champion best practice across engineering and architecture.

Contribute to the evolution of technical stacks and ways of working.

Collaborate with other teams to align with organisational goals.

Essential Skills & Experience

Proven experience as a Technical Lead or Senior Engineer.

Strong background in modern software engineering, ideally with Java.

Knowledge of microservices, Hexagonal architecture, MongoDB, and Kafka.

Experience with large-scale, complex digital products.

Focus on quality, security, and technical standards.

Excellent communication and leadership skills.

Why Apply?

Opportunity to contribute to one of the UK’s most impactful digital programmes.

Work at scale on services that directly benefit millions of people.

Shape technical strategy and lead talented engineering teams.

Long-term contract with competitive day rate.

Next Steps

If you’re interested in this opportunity, please apply with your CV. Shortlisted candidates will be contacted to discuss the role and next steps in the process.

Full Stack Developer

Uniting People

Location not specified

Fully remote

Mid

£450/day - £500/day

Urgent Contract Full Stack Developer

6 months duration

Fully remote - Inside IR35

Main purpose of the role:

We are seeking a talented and motivated Full Stack Developer to join our dynamic development team. The ideal candidate will have strong experience in building modern, responsive web applications using React, C#, JavaScript, and TypeScript, with a solid understanding of .NET and Azure environments. Experience with Azure Functions, Web API, Web Apps, Azure Logic Apps, and DevOps workflows including pipelines, deployments, and PowerShell scripting is essential. SQL experience is a valuable bonus. Familiarity with Okta integrations, Okta logins, and app integrations is considered an added advantage. This role involves close collaboration with back-end developers, UX designers, and business stakeholders to deliver high-quality digital solutions.

Key Responsibilities:

Design, develop, and maintain responsive web applications using React and .NET technologies.

Collaborate with cross-functional teams to define, design, and ship new features.

Optimize applications for maximum speed and scalability.

Ensure the technical feasibility of UI/UX designs.

Maintain and improve code quality, organization, and automation.

Participate in code reviews and provide constructive feedback.

Troubleshoot and debug issues across the front-end stack.

Contribute to the continuous improvement of development processes and tools.

Document technical specifications and development processes.

Key skills and experience required:

Proven experience developing front-end applications using React.

Solid understanding of .NET (preferably .NET Core) and integration with front-end technologies.

Experience deploying and managing applications in Microsoft Azure.

Familiarity with SQL and relational databases is a plus.

Strong understanding of web markup, including HTML5 and CSS3.

Experience with RESTful APIs and asynchronous request handling.

Good grasp of version control systems, especially Git.

Excellent problem-solving skills and attention to detail.

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

Ability to manage multiple tasks and meet deadlines in a fast-paced environment.

Essential Skills:

React, .NET, Azure, Azure Functions, Web API, Web Apps, Azure Logic Apps, C#, JavaScript, TypeScript, DevOps workflows (pipelines, deployments, PowerShell)

Beneficial skills:

SQL, UX/UI Collaboration, Git, Okta integrations, Okta logins, App integrations

pelines, deployments, PowerShell)

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Frequently asked questions

What types of contract Backend Engineer jobs are listed on Haystack?

Haystack features a wide range of contract Backend Engineer positions, including roles in startups, mid-sized companies, and large enterprises across various industries such as fintech, healthcare, and e-commerce.

How do I apply for a contract Backend Engineer job on Haystack?

To apply, simply create a profile on Haystack, upload your resume, and submit your application directly through the job listing. Some employers may require additional screening or coding tests.

Are the contract Backend Engineer jobs remote or on-site?

Haystack offers both remote and on-site contract Backend Engineer positions. You can filter job listings based on location preferences to find opportunities that match your availability.

What skills and technologies are commonly required for contract Backend Engineer roles?

Commonly required skills include proficiency in backend programming languages like Java, Python, Ruby, or Node.js, experience with databases such as MySQL or MongoDB, and familiarity with cloud platforms like AWS or Azure.

Can I negotiate contract terms such as duration and rate?

Yes, many contract Backend Engineer jobs on Haystack allow for negotiation on contract length, hourly rate, and other terms. Communication with the employer or recruiter during the interview process will help clarify these details.

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