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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!
Senior Developer (PHP/Laravel)
Rise Technical Recruitment
Chippenham
Hybrid
Senior
£50,000 - £60,000
RECENTLY POSTED

Senior PHP Developer (Laravel)
Swindon (Hybrid - 3 days per-week)
£50,000 - £60,000 + Bonus + Progression + Pension

An excellent opportunity awaits an experienced PHP Developer to join a growing, technology-first B2B business. This role offers strong technical variety, and clear progression opportunities to progress into a team or technical leadership role.

This company is an established but expanding B2B business, with technology as its key differentiator they’re looking to further grow and diversify their SaaS solutions offering.

In this role, you’ll take ownership of both new and existing systems, including maintaining legacy code where required. You’ll be hands-on across Laravel applications, APIs, and third-party integrations, working as part of a multidisciplinary team as the platform grows. As a smaller but scaling business, you’ll have real influence over the product, codebase, and technical direction long term. This role is hybrid based 3 days per week in the Swindon office.

The ideal candidate will have strong experience with Laravel and PHP across the full stack. The right person will have full-stack development experience, strong databased experience (SQL) and preferably cloud experience (AWS, Azure, or GCP). This role suits an experienced developer looking for a role where they can transition to a Lead Developer position in the short to medium term.

This is a great opportunity for a Senior PHP Developer looking for ownership over development and direction in a role that offers support, progression, and development opportunities.

The Role:
*Take ownership of new and existing systems, including legacy code, with responsibility for how they evolve
*Lead the hands-on development of a growing software suite across Laravel, APIs, and third-party integrations
*Contribute to and shape technical decisions around product direction, scalability, and architecture
*Hybrid role based in Swindon, with a minimum of 3 days per week in the office

The Person:
*Strong commercial experience with PHP and Laravel, comfortable owning and improving existing systems
*Full-stack developer with solid SQL/database experience; cloud exposure (AWS, Azure, or GCP) is beneficial
*Looking for a senior role with real ownership and a clear path into Lead Developer responsibility
*Based within commutable distance of Swindon with full UK right to work

Rise Technical Recruitment Ltd acts an employment agency for permanent roles and an employment business for temporary roles.

The salary advertised is the bracket available for this position. The actual salary paid will be dependent on your level of experience, qualifications and skill set and will be decided by our client, the employer. Rise are not responsible or liable for any hiring decisions made by the end client.

We are an equal opportunities company and welcome applications from all suitable candidates

Machine Learning Developer
Rubicon Consulting
West Midlands
In office
Mid - Senior
Private salary
RECENTLY POSTED

Rubicon Consulting is currently recruiting for a Machine Learning Developer on a 6 month contract based in Midlands.

Requirements:

· 5+ years of experience designing and implementing end‑to‑end ML solutions in production.

· Strong command of ML algorithms, model development, training, validation, and optimization.

· Expertise in Python, ML libraries, and version control (Git).

· Clear understanding of model evaluation, data leakage, and the bias/variance trade‑off.

· Hands‑on experience with cloud platforms (AWS/Azure/GCP) and MLOps practices, including Docker, CI/CD, deployment, and monitoring.

· Demonstrated success deploying and maintaining production ML models and writing modular, production‑grade code.

· Strong experience preparing, transforming, and validating complex real‑world datasets.

· Familiarity with LLMs/SLMs and modern ML frameworks (e.g., PyTorch, TensorFlow, HuggingFace).

· Excellent problem‑solving abilities and communication skills.

· Proven ability to work cross‑functionally with engineering and product teams.

Our Company

Rubicon Consulting is a Talent management consultancy which helps you to optimise business performance and competitive advantage by choosing the right people first time

Azure Cloud Engineer
Syntax Consultancy Ltd
London
Hybrid
Mid - Senior
£550/day - £600/day
RECENTLY POSTED
+4

Azure Cloud Engineer (SC Cleared)

London (Hybrid)

6 Month Contract

to £550/day-£600/day (Inside IR35)

Azure Cloud Infrastructure Engineer needed with active SC Security Clearance, AZURE Terraform code.

6 Month Contract based in Central London (Hybrid). Start ASAP in March 2026.

Hybrid Working - 2 days/week remote (WFH), and 3 days/week working on-site from the London office.

A chance to work with a leading global IT and Digital transformation business specialising in Government projects:

Experienced Azure Cloud Engineer required to support cloud transformation programme.

Must have in-depth experienced in AZURE Terraform code, GitHub Actions, implementation of both CI/CD. Hands-on experience in Software Development. Experience implementing or maintaining a CI/CD pipeline using Github Actions, Terraform, and Azure.

Good working knowledge of PowerShell, SQL of the installation and configuration of Windows based systems.

Provide automated testing as you develop and Strong written and verbal communication skills.

Experience of Agile methods, Azure DevOps, CI/CD pipeline maintenance + automation scripting, also strongly preferred.

Ability to plan, schedule and manage a demanding workload. Experienced in mentoring and training junior engineers.

Desirable: Experience implementing or maintaining a CI/CD pipeline using Github Actions, Terraform, and Azure.

Azure Monitoring. Software development experience using C# and SQL Server. Packer, Kubernetes, AKS, Flux or Helm

Banking / Financial Services domain experience preferred.

Must hold active SC Security Clearance used on a project within the past 12 Months

Java Software Developer (Inside IR35) - Contract
Stealth IT Consulting Limited
Manchester
Hybrid
Mid - Senior
£476/day
RECENTLY POSTED
+12

Contract: 6 months (likely extension)

Rate: £476 per day (Inside IR35)

Location: Manchester 1 day per week onsite

Start Date: 1st April

Interview Process: 2 stages

Project: Large-scale public sector programme

Overview We are looking for experienced Java Software Developers to support a major digital transformation programme within the public sector. The role involves building secure, scalable services and contributing to a high-performing Agile delivery team.

Key Responsibilities Develop, enhance, and maintain Java-based applications and microservices.

Work within cross-functional Agile teams (Developers, BAs, QAs, DevOps).

Contribute to API development, integration, and backend service build.

Deliver clean, testable, maintainable code aligned with best practices.

Participate in code reviews, pair programming, and continuous improvement.

Collaborate closely with architects and technical leads to ensure robust designs.

Support release processes and CI/CD pipelines.

Essential Skills & Experience Strong commercial experience in Java (8 or 11+) .

Hands-on experience with Spring / Spring Boot frameworks.

Experience building RESTful APIs and microservices.

Good understanding of AWS, Azure, or similar cloud platforms .

Familiarity with CI/CD pipelines (Jenkins, GitLab, GitHub Actions, etc.).

Experience with TDD/BDD and unit testing frameworks (JUnit, Mockito).

Background in Agile/Scrum delivery environments.

Ability to work within secure, complex, large-scale government / enterprise settings.

Desirable Skills Experience with public sector or GDS-aligned projects.

Knowledge of Docker, Kubernetes, or containerised environments.

Exposure to messaging technologies (Kafka, SNS/SQS, RabbitMQ).

Understanding of monitoring/logging tools (ELK, Grafana, Prometheus).

Additional Information Role is Inside IR35 payable via umbrella.

Onsite requirement: 1 day per week in Manchester .

Must be eligible to work in the UK and pass standard BPSS checks.

TPBN1_UKTJ

Software Engineer
McGregor Boyall Associates Limited
City of London
Hybrid
Mid
£500/day - £700/day
RECENTLY POSTED

Mid-Level Engineer - Technology & Innovation

London, UK | Hybrid 3 days a week in office.

We’re hiring a Mid-Level Engineer to join a growing Technology & Innovation team within a Financial Advisors firm, one of the UK and Ireland’s leading Corporate Finance advisory firms.

Reporting to the CTO, you’ll help deliver and manage our cloud-agnostic data & AI platform , scale client digital products , and work across cutting-edge technologies including AI, cloud platforms, and data engineering . This role sits at the heart of our strategy to unlock value from data across real assets, sustainability, and essential services .

What you’ll do

Build and enhance our cloud platforms and data infrastructure

Deploy AI/ML and GenAI solutions into production

Drive automation and operational efficiency using AI and RPA

Support development of client-facing digital platforms and dashboards

Modernise systems into cloud-native, API-first architectures

Key skills

Cloud engineering (Azure, Kubernetes, serverless, DevOps)

Python and relational databases (SQL)

Data platforms, ETL/ELT, and analytics

AI tools and LLM integrations (e.g. GPT, Claude, Gemini)

Security, governance, and regulated environment experience

Why this team?

Work in a high-performing, cooperative team

Exposure to advanced AI and data technologies

Opportunity to shape technology strategy in corporate finance

A values-driven B-Corp organisation focused on Finance with a Purpose

If you’re an ambitious technologist who enjoys solving complex problems and building impactful platforms, please apply below.

*This role does not offer Visa sponsorship*

McGregor Boyall is an equal opportunity employer and do not discriminate on any grounds.

TPBN1_UKTJ

ML & AI Engineer
DCV Technologies
London
Remote or hybrid
Mid - Senior
£450/day - £650/day
RECENTLY POSTED

ML & AI Engineer – Python, LLM, RAG, GCP We are seeking a Machine Learning / AI Engineer to help build and deploy production-grade generative AI and LLM systems powering next-generation conversational digital experiences. This role focuses on designing and engineering LLM applications, RAG pipelines and scalable AI infrastructure using Python and Google Cloud (GCP). You will work on cutting-edge agentic AI and conversational AI platforms, building services that support intelligent assistants and automated customer interactions. Key Responsibilities \* Build and deploy LLM-based applications and generative AI solutions \* Develop RAG (Retrieval Augmented Generation) pipelines \* Engineer scalable microservices-based AI platforms \* Design and maintain data pipelines using Python and Spark \* Implement CI/CD pipelines for machine learning and AI systems \* Work with GCP services including Vertex AI, BigQuery, Dataflow, Spanner and Firestore \* Contribute to prompt engineering, LLM evaluation and monitoring \* Build integrations between AI agents and enterprise systems Required Skills \* Strong Python development experience \* Experience building LLM or generative AI applications \* Knowledge of RAG pipelines and prompt engineering \* Experience with microservices architecture and CI/CD \* Hands-on experience with Google Cloud Platform (GCP) \* Familiarity with Spark or large-scale data pipelines Nice to Have \* Experience with LangChain, LangGraph or agentic AI frameworks \* Knowledge of multi-agent architectures or AI orchestration \* Experience building production AI platforms This is an opportunity to work on large-scale AI engineering challenges, delivering production AI systems and intelligent digital assistants using modern LLM, generative AI and cloud-native technologies

Middleware Specialist
TECHNOLOGY AND RISK RECRUITMENT LTD
London
In office
Mid - Senior
Private salary
RECENTLY POSTED
TECH-AGNOSTIC ROLE

Role: Middleware Specialist - Defence Sector Location: London (On-site) Start Date: ASAP Contract: Freelance Duration: 12 Months +
About the Role:
We are seeking an experienced Middleware Integration Specialist to join a high-profile defence project in London. You will design, develop, and maintain middleware solutions to enable seamless communication between heterogeneous systems. This is a freelance, on-site role requiring candidates with proven expertise in advanced middleware technologies and protocols.

Candidates must be freelance contractors and have Security clearance or eligible for Security clearance due to the nature of the programme

Key Responsibilities:

  • Design, develop, and maintain robust middleware solutions to integrate complex systems.
  • Implement and support middleware protocols such as OSLC and ReqIF for reliable data exchange.
  • Assess existing architectures, recommend integration strategies, and implement best practices for scalability and security.
  • Troubleshoot and optimize middleware components, collaborating with development and operations teams to ensure high-performing integration platforms.

Mandatory Requirements:

  • Proven experience with middleware design and development in complex environments.
  • Expertise in OSLC, ReqIF, or equivalent middleware protocols.
  • Strong knowledge of integration best practices, scalability, and security in middleware solutions.

Additional Information:

  • Defence sector experience highly desirable.
  • This role is on-site in London.

If you are an experienced Business Analyst looking for a long-term freelance engagement within the defence sector, we would be keen to speak with you.

Implementation Consultant - Pension Calculator Development
Candidate Source
Multiple locations
Fully remote
Mid - Senior
Private salary
RECENTLY POSTED

We are seeking an experienced Implementation Consultant who has built pensions calculators and has credible system programming and implementation skills. Who can confidently code complex pension scheme rules into accurate calculation logic while ensuring compliance with UK pensions legislation. Who also has strong analytical capability and prioritisation to work across multiple parallel workstreams and deliver on time.

You will design and deliver automated pensions calculation frameworks using T-SQL, SQL, XML and supporting scripting tools. You will collaborate with project teams and clients to develop and implement pension calculators that offer automation to support users, reduce risks and improve overall pension member servicing. You will produce technical specifications, configure system functionality, run tests and ensure all automated outcomes are accurate, compliant and aligned to client requirements.

What youll be doing as an Implementation Consultant:

  • Configuring, implementing and maintaining pensions benefit calculator systems (DB, DC, GMP equalisation, valuations).
  • Coding calculator logic using SQL, T-SQL, XML and related scripting tools.
  • Configuring workflows, data dashboards, interfaces, payroll components, data migration and reports.
  • Hosting workshops with clients to understand requirements, create structured specifications and set out clear implementation schedules.
  • Providing regular updates to clients on implementation progress, actions and providing flexibility to developing requirements.
  • Taking ownership of multiple workstreams and collaborating with internal project teams to ensure delivery expectations are met.
  • Customising the administration system to be user friendly and meet unique requirements.
  • Supporting software releases, upgrades and testing cycles and training workshops.
  • Producing documentation and maintaining strong client and team relationships.

What were looking for in an Implementation Consultant:

  • Experience developing pensions calculators for DB and DC pension schemes.
  • Proven ability to code or develop system tools for pensions and financial processes.
  • Proficiency with T-SQL, SQL Server Management Studio, XML and Microsoft tools.
  • High degree of numeracy and analytical skill.
  • Excellent communication, organisation and stakeholder engagement skills.
  • Experience working with pensions administration systems.
  • Programming or scripting experience (macros or equivalent).

Core hours: Monday to Friday. 37.5 hours per week.
Location: Remote, with occasional UK travel.
Day rate: Competitive via umbrella contract dependant on experience.
Duration: 6 months with opportunity to extend.

To apply for this role as Implementation Consultant, click apply now!

Please note any offer is subject to satisfactory pre-employment screening checks. These consist of employment, activity & GAP verification, DBS or Access NI, Credit, Sanctions & CIFAS checks.

We are committed to equality of opportunity for all hires and applications from individuals are encouraged regardless of age, disability, sex, gender reassignment, sexual orientation, pregnancy and maternity, race, religion or belief and marriage and civil partnerships.

To help you stay safe in your job search we will never ask for your bank details at the application stage.

Candidate Source Ltd is an advertising agency. Once you have submitted your application it will be passed to the third party Recruiter who is responsible for processing your application. This will include holding and sharing your personal data, our legal basis for this is legitimate interest subject to your declared interest in a job. Our privacy policy can be found on our website and we can be contacted to confirm who your application has been forwarded to.

Mobile Backend Developer - Kotlin and java - Manchester, UK
Infoplus Technologies UK Ltd
Manchester
Hybrid
Senior
Private salary

Role:Mobile Backend Developer - Kotlin and javaDuration: 6 MonthsLocation:Manchester, UK (3 days Hybrid)

The Role

Seeking a Senior Application Engineer ( Backend cloud based application development) with deep technical expertise and thought leadership. You will drive strategy for your area of expertise across teams and foster a developer community within your domain. The role involves mentoring junior staff, ensuring high-quality deliverables, promoting best practices like TDD and BDD, and leading engineering practices across the SDLC.

Your responsibilities:

  • Provide advanced technical expertise in Backend Development, supporting the team with effective solutions and practical insights.
  • Participate in all phases of the Software Development Life Cycle (SDLC), including requirements gathering, development, deployment, and ongoing maintenance.
  • Demonstrate a commitment to keeping up with industry trends, emerging technologies, and best practices, actively applying them in your work.
  • Contribute new ideas, tools, and methodologies to help foster a culture of continuous improvement and innovation within the team.
  • Share knowledge and mentor peers and junior engineers, supporting their growth and skills development.
  • Collaborate with technical leads, IT teams, and business stakeholders to understand project requirements, implications, and dependencies.
  • Review and provide feedback on technical documentation, suggesting improvements where appropriate.
  • Promote and practice best development approaches such as Test-Driven Development (TDD) and Behavior-Driven Development (BDD) to deliver high-quality, maintainable code.
  • Apply design patterns to address complex problems, ensuring code is efficient, readable, and reusable.
  • Adhere to IT and Information Security policies and procedures in all engineering activities.

Your Profile

Essential skills/knowledge/experience:

  • Preferred - Experience of building distributed scalable microservices using Java/Kotlin, Spring Boot, OAuth 2.0, Secure API design
  • Understanding of API design for mobile application with event driven architecture
  • Strong analysis and problem-solving skills
  • Knowledge of the financial services industry
  • Other technologies/areas: AWS, API Design, Automation testing
Contract Data Engineer
MCS Group
Belfast
In office
Mid - Senior
£106,600/day - £106,600/day

MCS Group is working with an AI enabled software house who is seeking an experienced Contract Data Engineer to support a key automation initiative. This role will focus on building scalable automation across their data platform while supporting migration and modernisation of existing data infrastructure. This is an excellent contract/project for someone who has previously worked on data migration, cloud transformation, or platform modernisation projects, and enjoys building robust, automated data solutions in a cloud-first environment. The Role Design, build, and maintain scalable data pipelines and automation for data ingestion, transformation, and delivery. Develop and optimise SQL-based data models across large relational databases. Build and manage AWS-based data infrastructure using services such as Redshift, Glue, Lambda, S3, and Athena. Implement and maintain ETL/ELT pipelines to integrate data from multiple systems. Support data platform migration and modernisation initiatives. Ensure high standards of data quality, performance optimisation, and governance. Contribute to DevOps and automation practices, including infrastructure-as-code and CI/CD where appropriate. The Person Extensive proven experience as a Data Engineer is essential. Strong hands-on expertise with large relational databases and advanced SQL optimisation. Experience working with AWS data services is essential (including Redshift, Glue, Lambda, S3, and Athena.) Strong experience building ETL/ELT pipelines and data integration workflows. Experience with Python, Spark, or other data processing technologies. Familiarity with Terraform, CI/CD pipelines, and infrastructure-as-code practices. IR35: Outside Duration: 6 months Rate: £410 per day Location: Belfast or London - Please note, in-office working is required in either location. To speak in absolute confidence about this opportunity please send an up-to-date CV via the link provided or contact Jill Johnston, Head of IT Contracts, at MCS Group Even if this position is not right for you, we may have others that are. Please visit MCS Group to view a wide selection of our current jobs MCS Group is committed to Equality, Diversity, and Inclusion for all, being the first recruitment agency in NI to achieve Bronze Diversity Mark accreditation, if you have a disability which means you require a reasonable adjustment to be considered at any stage of the recruitment process, please contact us and we will endeavour to facilitate the request. Not all agencies are the same MCS Group are passionate about providing a first-class service to all our customers and have an independent review rating of 4.9 stars on Google. Skills: data engineer AWS SQL Database developer automation

HRIS System Integration Engineer
Morson Edge
Hemel Hempstead
Hybrid
Mid - Senior
£550/day - £600/day

Location: Hybrid (2 days travel to their offices in Hemel Hempstead)
Contract: Outside IR35
Day rate: Up to £600 per day
Duration: Initial 3 months but will most likely extend
Start date: ASAP
Key words: ElementSuite, Integration, API, Dataflows

We are looking for a HRIS system Integration Engineer to connect our Clients core HRIS (ElementSuite) with their AI recruitment tool (Talent.AI) and their workforce management/benefits partner (Aslan). You will be responsible for designing the data flow, writing the Middleware or scripts to sync these systems, and ensuring that data remains secure and accurate across all platforms.

Core Responsibilities

  • API Development & Mapping: Use REST APIs to create seamless data synchronisation between ElementSuite, Aslan, and Talent.AI.
  • Workflow Automation: Automate the _Hire-to-Onboard_ journey (eg, when a candidate is marked _Hired_ in Talent.AI, their profile is automatically created in ElementSuite and triggered in Aslan).
  • Ensure that employee IDs, job codes, and sensitive payroll data match perfectly across all three systems.
  • Troubleshooting & Monitoring: Monitor API performance using New Relic, AWS CloudWatch, or Azure Monitor resolve sync errors before they impact the end-user experience.
  • Documentation: Create a technical map of how these systems are connected for future maintenance.

Technical Skills Required

  • API Expertise:
    o Deep experience with RESTful APIs, JSON, and Webhooks.
    o Programming: Proficiency in Python or Node.js.
  • Experience building integrations on AWS (Lambda, Step Functions, API Gateway) or Azure (Logic Apps, Functions, Service Bus).
  • HR Tech Familiarity: Previous experience with HRIS (ElementSuite, Workday, Zellis Resourcelink, etc.), payroll/workforce intelligence platforms (Zellis Intelligence), or ATS (Talent.AI, Greenhouse, etc.) is a major plus.
Full Stack Software Engineer
Matchtech
Tring
Hybrid
Senior
£70/hour
+2

Location: Tring (Predominately onsite with flex where project allows) Duration: 4-6 month contract IR35: Outside IR35 Role detaills: Our client, a leading entity in the Defence & Security sector, is seeking a highly motivated Senior Software Engineer to join them on a contract basis - The role will encompass the design and development of a web-based control and monitoring dashboard application for an antenna terminal system. Key Responsibilities: Design and develop a web-based control and monitoring dashboard application for an antenna terminal system. Engage in the full design life cycle from specifications generation to thorough regression testing of pre-production units. Build and maintain React/Next.js frontend applications and NestJS backend services within a shared pnpm monorepo environment. Integrate user-facing components with backend services using various communication protocols (REST, WebSockets, SNMP, MQTT, etc.). Develop the GUI using a mix of off-the-shelf UI components and custom modules. Ensure the UI code is well-structured, scalable, and testable, conforming to UX/architecture guidelines. Ensure compliance with modern accessibility standards and usability best practices across browsers and devices. Contribute to software architecture, project planning, and specification documentation. Job Requirements: Proficiency in frontend technologies including HTML5, CSS3, JavaScript, TypeScript, React, and Next.js. Experience with backend services using NestJS and related TypeScript tooling. Understanding of various communication protocols like TCP/IP, HTTP, and SNMP. Experience with containerization tools such as Docker. Ability to design, implement, integrate, and verify software applications on Linux and Windows OS. Proven product development experience from concept through deployment. Familiarity with networked applications that require low-latency and high-availability. Preferred Experience: Knowledge of communication systems design. Understanding of various communication protocols, including RS-232, I2C, CAN, SPI, USB, TCP, and UDP over IP. Familiarity with databases, web servers (e.g. Apache), and UI/UX design. Interested? Apply today via the link provided

Full Stack Developer (Python / React)
Rise Technical Recruitment
London
In office
Mid - Senior
£60,000 - £70,000
+2

Camden - Office Based
6-9 month FTC
60,000 to 70,000 Pro Rata + Benefits

Exciting opportunity for a skilled Full Stack Developer to join a fast-growing London business, helping to design and build the backend systems, automation tools, and cloud infrastructure that support the company’s technology roadmap.

The business is expanding its internal systems and automation capabilities and is looking for a developer with strong experience in Python, AWS cloud services, and modern API development. This role offers the chance to work on impactful projects including business automation, data processing systems, and modern web applications.

In this role you will collaborate closely with engineering teams and business stakeholders to design and build backend services, APIs, and automation tools. You will work with technologies such as Python, AWS services including Lambda, EC2, S3, RDS, and API Gateway, as well as SQL databases and data processing libraries. You will also contribute to front end development using React where required and support integrations with Microsoft Office workflows and reporting systems.

The ideal candidate will have strong commercial experience developing backend systems using Python and building modern APIs. Experience with React, JavaScript or TypeScript, AWS cloud services, and SQL databases is essential.

Experience building automation tools, working with large datasets, or integrating with Microsoft Office workflows would be highly beneficial.

This is a unique opportunity to join a growing company at an exciting stage, working on modern cloud based systems while helping to improve automation, data processing, and development practices across the business.
The Role:
Design and develop backend systems and APIs using Python
Build secure, scalable, and maintainable cloud services within AWS
Develop automation tools and scripts that integrate with Microsoft Office workflows
Contribute to front end development using React where required
Design and maintain data processing pipelines and reporting systems
Optimise SQL queries and database performance
Collaborate with engineering teams and business stakeholders to build technical solutions
Contribute to improvements in development processes, tooling, and code quality
The Person:
Experienced Full Stack Developer with strong Python backend development skills
Commercial experience developing RESTful APIs and backend systems
Experience building modern web applications using React
Strong understanding of SQL databases, data modelling, and query optimisation
Experience working with AWS cloud services such as Lambda, EC2, S3, RDS, and API Gateway
Interest in automation, data processing, and business workflow integrations
Strong problem solving skills, attention to detail, and effective communication
Experience with Microsoft Office automation, data pipelines, or CI/CD pipelines is a plus

Rise Technical Recruitment Ltd acts an employment agency for permanent roles and an employment business for temporary roles.

The salary advertised is the bracket available for this position. The actual salary paid will be dependent on your level of experience, qualifications and skill set and will be decided by our client, the employer. Rise are not responsible or liable for any hiring decisions made by the end client.

We are an equal opportunities company and welcome applications from all suitable candidates.

Java Software Engineer
Arm
Gloucester
In office
Mid
£60/hour - £65/hour

12 month contract

Based in Bristol

Offering 65ph Inside IR35

Do you have experience with Java?

Do you have experience in RTOS?

Do you want to work with an industry-leading company?

If your answer to these is yes, then this could be the role for you!

As the Java Software Engineer, you will be working alongside a market-leading Defence and Aerospace company who are constantly growing and developing. They are always looking to bring on new talents such as yourself and further develop your skills to enable you to grow within the company and industry.

Due to the nature of the work you will be involved in, you will be required to obtain UK SC clearance in this role.

You will be involved in:

Continued design and development of new and evolving software tools and architectures

Instantiations for future products

Skillset/experience required:

  • A background in software engineering, its realisation and system wide impact
  • Experience working in Java
  • Experience across the entire software development process
  • Experience in other languages such as Ada
  • Knowledge of DDS middleware and Real Time Operating Systems
  • Knowledge of standards such as DefStan 00-55, DO-178C or IEC61508

If this all sounds like something you will be interested in then simply apply and we can discuss the opportunity further!

Java Software Engineer

12 month contract

Based in Bristol

Offering 65ph Inside IR35

Disclaimer:

This vacancy is being advertised by either Advanced Resource Managers Limited, Advanced Resource Managers IT Limited or Advanced Resource Managers Engineering Limited (“ARM”). ARM is a specialist talent acquisition and management consultancy. We provide technical contingency recruitment and a portfolio of more complex resource solutions. Our specialist recruitment divisions cover the entire technical arena, including some of the most economically and strategically important industries in the UK and the world today. We will never send your CV without your permission. Where the role is marked as Outside IR35 in the advertisement this is subject to receipt of a final Status Determination Statement from the end Client and may be subject to change.

SC DevOps Engineer
Sanderson Recruitment
London
Remote or hybrid
Mid - Senior
£504/day - £504/day
+3

DevOps Engineer (Active SC)

£504.49/day Inside IR-35

Remote with occasional travel to London, Manchester or Leicester

6 month initial contract

We are looking for a DevOps Engineer to work closely with developers and IT teams to manage and optimise code releases, bringing together strong engineering principles with practical coding knowledge. You will play a key role in creating and implementing systems software, analysing data to enhance existing solutions, and driving productivity across the organisation. A solid understanding of the software development lifecycle is essential, along with hands-on experience using automation tools to build and maintain CI/CD pipelines.

Mandatory experience and skills include:

* Proven ability to learn quickly and apply new technical skills
* Hands-on experience delivering technical projects within the DevOps domain
* Experience working in an integration-focused scrum team, supported by architects and subject matter experts
* Ability to collaborate effectively with client teams remotely, supporting successful integration with external applications
* Experience with WebSphere, MQ, IBM BPM or other rules-based application technologies
* Familiarity with JIRA and Confluence
* Knowledge of scripting languages such as ANT, Ansible, Bash, or Terraform
* Creating and maintaining CI/CD pipelines
* Experience with Jenkins, AWS, Git, Docker, and Liquibase

Reasonable Adjustments:

Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome applications from people of all backgrounds and perspectives. Our success is driven by our people, united by the spirit of partnership to deliver the best resourcing solutions for our clients.

If you need any help or adjustments during the recruitment process for any reason, please let us know when you apply or talk to the recruiters directly so we can support you.

Software Engineer - Remote
Experis IT
London
Fully remote
Mid - Senior
£600/day

Transport Club Software Engineer - Remote

An opportunity is available for a skilled Transport Club Software Engineer to support critical transport technology systems used across the UK. This role sits within the ITSO Back Office value stream and focuses on the development, support and continuous improvement of core transaction processing platforms used by transport operators nationwide.

You will contribute to the development and support of the Transport Club HOPS, Fulfilment and Actora product suites along with associated services and shared libraries. These platforms handle journey transaction processing and message routing that underpin national transport services.

The Role - Transport Club Software Engineer

  • Develop, maintain and support Transport Club HOPS, Fulfilment and Actora platforms.
  • Deliver software enhancements across the full life cycle from design through deployment.
  • Support DevOps delivery pipelines and assist with escalations from the Transport Club Service Desk.
  • Work closely with internal teams and third party clients to support platform usage and improvement.
  • Contribute to ongoing improvements to engineering practices, tooling and platform performance.
  • Participate in Agile delivery cycles including sprint planning, development and release.

Key Skills and Experience

  • Strong experience in Java enterprise development.
  • Experience working with relational database technologies.
  • Experience developing large scale enterprise applications.
  • Knowledge of ITSO transport systems or standards.
  • Understanding of software engineering best practices.
  • Experience with automated software testing frameworks.
  • Experience working with DevOps integration and deployment pipelines.
  • Experience working within Agile Scrum delivery teams.
  • Familiarity with technologies such as Git, Jenkins, Groovy, Elasticsearch, Cucumber, JUnit, REST services, Angular, Node and C#.

This role suits an experienced Transport Club Software Engineer who enjoys working on large scale systems that support national infrastructure.

To apply, please send your CV by pressing the apply button

LANSA Developer
Tec Partners
Norwich
Fully remote
Mid - Senior
£300/day - £600/day
TECH-AGNOSTIC ROLE

Contract Opportunity: LANSA Developer (IBM i) - 6+ Month ERP Upgrade Project

We’re currently looking for an experienced LANSA Developer to join an exciting ERP upgrade programme for a leading organisation. This is a contract role for a minimum of 6 months, supporting the migration from Oracle JDE World to Oracle JDE EnterpriseOne.

Key Requirements

  • Strong experience developing in LANSA RDML
  • Hands-on use of the Visual LANSA Editor
  • Solid experience working on the IBM i (AS/400) platform
  • Ability to support and contribute to large-scale ERP upgrade or transformation projects

Project Overview
You will play a key role in helping deliver a major ERP upgrade, assisting with development, code enhancements, and ensuring a smooth transition from JDE World to JDE EnterpriseOne. This is a great opportunity to work on a high-impact project within an established enterprise environment.

Contract Details

  • Contract: Minimum 6 months
  • Start: ASAP
  • Location: Remote
  • Rate: Competitive (dependent on experience)

If you’re a LANSA developer with strong IBM i experience and availability for a new contract, we’d love to hear from you.

Get in touch or send your CV to discuss the role in more detail.

Senior Oracle Fusion Developer
Matchtech
Not Specified
In office
Senior
Private salary

Our client is seeking a Senior Developer with expertise in Oracle Cloud, Oracle Financials, Oracle Fusion, and Oracle HCM to join their team in the public sector. This is a contract role within a highly dynamic environment, focusing on the stabilization, maintenance, and enhancement of the Metis Live Service within the Shared Application Services.

Key Responsibilities:

  • Develop and implement structured workload management plans.
  • Assess team member strengths and distribute tasks accordingly.
  • Create and maintain detailed task schedules with deadlines and milestones.
  • Prioritize tasks based on importance, urgency, and their impact on project goals.
  • Track progress and conduct regular check-ins to review status.
  • Identify and address workload-related issues or bottlenecks.
  • Enable open communication to surface and resolve concerns about workload distribution.
  • Plan and execute deployment activities for smooth transitions to live environments.

Essential Skills and Experience:

  • Experience in workload management and task prioritization.
  • Subject matter expertise in various Cloud Oracle Fusion modules including:
    • General Ledger, Accounts Payable, Accounts Receivable, Fixed Assets, Cash Management, Expenses, Tax, Projects
    • Employee Records, Absence Management, Recruitment, Learning, Performance Management
    • Self Service, HR and Absence
    • Payroll and Time & Labour
    • Redwood interface
  • Proficiency in Fast Formula, OTBI reporting, PL/SQL, Workflow, HDL, Visual Builder Studio, Oracle BIP, XML/BI Publisher, and FBDI/ADFDI.
  • Understanding of business processes including Procure to Pay, Order to Cash, Record to Report, Asset Management, Bank Reconciliation and Treasury, Intercompany Processing, and Period Close and Reconciliation.
  • Experience with L2 and L3 incident management and reporting.
  • Ability to work with third parties to resolve incidents.
  • Knowledge of path to live release management and deployment.

If you have the required experience and are excited about the prospect of contributing to a critical public sector operation, apply now to join our client’s dynamic and dedicated team.

Java Developer eTrading
Hays Specialist Recruitment Limited
London
Hybrid
Mid - Senior
Private salary

Join a leading independent technology and services provider as a Java Developer - e-Trading! Job OverviewJoin a fast-paced and highly collaborative eFX Quantitative Developer team within Global Markets. You'll help build and enhance a best-in-class eFX trading platform, working closely with quants and traders to drive automation, performance, and revenue. This role sits within the Principal Flow Trading stream and offers hands-on ownership of the full development lifecycle. Location: London (Hybrid) Daily Rate: Flexible Contract Length: Until Dec 2026 Start Date: ASAP Key Responsibilities Develop and enhance a low-latency, high-throughput eFX algorithmic trading platform Own initiatives end-to-end: analysis, design, implementation, delivery Design, implement, and back-test pricing and execution strategies Build analytics to monitor model and platform performance Enhance the proprietary eTrading framework used across Global Markets Collaborate closely with quants, traders, and technology teams in an agile environment Key Requirements Strong business knowledge of electronic trading, ideally eFX Proven experience building low-latency, event-driven algorithmic trading platforms Advanced Java expertise, including lock-free and low-garbage techniques Experience working with quant teams and implementing algorithmic models Familiarity with messaging protocols such as Aeron, Kafka, FIX, SBE, ITCH, OUCH Knowledge of time-series databases (preferably KDB) and Python for analytics Full-stack experience (React) is beneficial for building trader tools and dashboards Additional Information Interview Process: Typically 2 stages - technical interview, system design, and team discussion How to ApplyIf you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us today. 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 Talent Solutions is a trading division of Hays Specialist Recruitment Limited and 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 hays.co.uk

Senior Developer (Oracle ERP)
Tec Partners
London
Fully remote
Senior
£650/day - £700/day
TECH-AGNOSTIC ROLE

Employment Type: Contract

Duration: 12 Months

Umbrella Pay Rate: 650/Day - 700/Day

Location: Remote

Opportunity Overview

We are supporting a large organisation seeking a Senior Developer with strong experience in Oracle Fusion ERP, particularly across HR modules, to support and enhance a critical enterprise platform within its Shared Application Services function.

This role will focus on the stabilisation, maintenance and continuous improvement of a live enterprise service environment. You will play a key role in ensuring the reliability and performance of the platform while contributing to future enhancements and releases. The position combines hands-on technical expertise with responsibility for workload coordination, incident resolution and ongoing service improvement.

Key Responsibilities

  • Contribute to the ongoing stability, maintenance and enhancement of a live Oracle Fusion ERP environment.
  • Coordinate and distribute workloads across the team, ensuring tasks are assigned effectively based on skills, priorities and delivery timelines.
  • Prioritise development and support activities to ensure critical business needs are addressed in a timely manner.
  • Monitor progress against delivery plans, conducting regular reviews to ensure alignment with service and project objectives.
  • Investigate incidents and perform root cause analysis to identify underlying issues and implement long-term solutions.
  • Manage and resolve L2 and L3 support incidents, working closely with internal teams and third-party partners where required.
  • Maintain clear communication with stakeholders regarding incident status, progress and expected resolution timelines.
  • Contribute to problem management by proactively identifying recurring issues and implementing preventative measures.
  • Support release and deployment activities, ensuring changes are fully tested and validated before moving to production environments.

Essential Skills and Experience

  • Proven experience supporting and developing within Oracle Fusion Cloud ERP environments, ideally in a senior or lead developer capacity.
  • Subject matter expertise in one or more Oracle Fusion modules, particularly HR-focused areas such as:
  • Employee Records
  • Absence Management
  • Recruitment
  • Learning
  • Performance Management
  • Self Service HR
  • Payroll and Time & Labour
  • Experience managing or coordinating workloads within a technical support or development team.
  • Strong experience working with incident management, problem management and root cause analysis in live service environments.
  • Ability to work on L2 and L3 support incidents, coordinating with internal teams and third-party vendors where necessary.
  • Strong understanding of enterprise business processes, such as Procure to Pay, Order to Cash, Record to Report and Period Close.

Application Process

If you have strong experience working with Oracle Fusion ERP, please submit your CV for consideration. Further details will be shared with shortlisted applicants.

ElasticSearch SME
Hays Technology
London
Hybrid
Mid - Senior
£450/day - £500/day
+5

ElasticSearch SME - Active SC, ElasticSearch, Nginx

Up to 500pd (Inside IR35)

London/Hybrid

6 months

My client is a high profile consultancy who are seeking an ElasticSearch SME, with Active Security Clearance (SC) to join a business critical programme for an end client.

Key Requirements:

  • Proven experience as an ElasticSearch SME with Active Security Clearance (SC)
  • Working experience using ElasticSearch as core component, not just ELK logging
  • Hands on support of legacy applications and infrastructure
  • Strong experience with Nginx and Apache Tomcat/HTTP
  • Working knowledge of Containerisation / Virtualisation (e.g. Docker, VMware) and Linux with Shell scripting.
  • Hands-on experience supporting ElasticSearch integrations (indexing, query DSL etc) and experience supporting search-driven services (JSON, Logstash, Kibana etc)
  • Experience with Platforms and Operation Systems including, Oracle Solaris 10, Red Hat Enterprise Linux 8, Windows Server 2008 / 2016 / 2019, VMware ESX v6, Docker, IBM Initiate (Master Data Management)

Nice to have:

  • Working experience with Java 8, 5, 6, 11, Enterprise JavaBeans (EJB) and JSP
  • Immediate availability

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)

Frequently asked questions
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.
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.
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.
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.
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.