1,147 Decentralized Systems jobs in the United Kingdom

Full Stack Developer | 3 Roles Available | 3 Month Initial Contract | Up to 550 per day (Inside IR35) | London (2 days per week on-site) | Active SC Clearance Required

MERITUS are working with a well-established financial services company in London who are looking for 3 experienced Full Stack Developers to join them on a 3-month contract. The business is undergoing a major technology transformation, and this role will play a key part in delivering new features and scaling their cloud-based platforms.

They're looking for engineers experienced in .NET / C#, Angular & experience deploying applications & platforms into Azure. DevOps & IaC experience (Terraform) would be highly beneficial.

The roles are based in London & are hybrid with 2 days per week in the London office. Candidates are required to hold an active SC Clearance.

• Strong background as a Full Stack Developer on commercial projects.
• Hands-on experience with Angular.
• Proven expertise with C#/.NET Core.
• Practical knowledge of Azure services and cloud-based architectures.
• Good experience with Terraform for Infrastructure as Code.
• Familiarity with CI/CD and agile ways of working.

Got your attention?

If you believe that you have the skills and experience for the Principle Engineer role - then please get in touch. We also offer a referral scheme for any candidates whose details are passed to us that we successfully place. If you have any further questions then please contact Ryan Harris at MERITUS.

Software Engineer – Surrey – Hybrid – Up to £40k

Are you a passionate Software Engineer ready to make a tangible impact? Do you thrive on solving complex problems and developing scalable, high-quality solutions? Join our client’s growing Software Engineering team and support them in shaping the future of technology across critical projects that matter, within the engineering sector.

About the Role

As a Software Engineer (Level 3), you’ll be at the heart of their development efforts—designing, building, and delivering robust software solutions in collaboration with a talented, supportive team. You'll own your code, contribute to key design decisions, and help mentor Junior Engineers, all while continuing to develop your own skills and expertise.

What You’ll Be Doing…

• Build clean, efficient, and maintainable code using .NET (ASP.NET Core, C#, Web API).
li>Engage in the full software development lifecycle—planning, coding, testing, deploying. < i>Collaborate closely with engineers, managers, and wider teams to deliver scalable solutions.
• Participate in technical design discussions and contribute to architectural decisions.
• Debug and troubleshoot complex issues in real-time.
• Ensure compliance with coding, security, and documentation standards.
• Provide guidance and mentorship to junior team members.
• Help improve test coverage and contribute to evolving best practices.

What You’ll Need…

• Strong expertise in .NET technologies—including ASP.NET Core, C#, Web API.
< i>Proficiency in working with SQL databases and queries.
• Solid grasp of software development best practices and methodologies.
• Experience in code reviews, with a focus on clean, secure, and scalable code.
• Excellent communication and collaboration skills.
• Familiarity with Version Control (e.g. Git).

Even better if you have…

< i>Experience with Agile methodologies.
• Understanding of UI/UX principles and responsive design.
• Exposure to cloud platforms (Azure or AWS).
• Knowledge of CI/CD pipelines and deployment workflows.
• Basic awareness of cybersecurity principles.
• Scripting with Python or PowerShell.
• Experience with SharePoint / O365 Application development.
• Familiarity with CAD software (Bentley, AutoCAD, Autodesk, Trimble).
• Interest in Geospatial mathematics and geometry.

Why Join?

You’ll be working on meaningful projects, be part of a collaborative, inclusive and forward-thinking team and gain continuous development. 

If you're driven by innovation, growth, and the opportunity to do work that matters, apply now and I’ll be in touch shortly &#(phone number removed);

Tilt Recruitment are specialists in IT Recruitment. We work hard to find our candidates their perfect roles within fantastic organisations across the UK. If this role isn’t right for you, please still get in touch with us as we may have other roles which may suit you better.

We also offer up to £500 for every successful referral, if you know someone who matches this skill set please let us know.

Tilt Recruitment is acting as an Employment Business in relation to this vacancy.

We're looking for a Senior-level Software Engineer with strong JavaScript/TypeScript skills and experience across modern web stacks. You'll be instrumental in our transition away from Drupal as we modernise and scale our platform.

Tech Stack:

• At least 4 years commercial experience with JavaScript or TypeScript and Node
• Exposure of Laravel and/or Python (Django or Flask a plus)
• Familiarity with Drupal and some knowledge of modern front-end frameworks (React, Vue, etc.)

What You'll Do:

• Build scalable applications using modern frameworks and clean architecture
• Contribute to backend services and APIs (Python or Laravel-based)
• Help re-platform and migrate to a modern stack
• Collaborate cross-functionally with UX, Product, and DevOps

What We Offer:

• A supportive environment that encourages professional growth and continuous learning.
• An inclusive, collaborative culture within one of the UK's leading business services providers.
• A competitive salary and benefits package.

49904MS

INDLON

Software Engineer

- OOP, PHP, LAMP, MVC, HTML, CSS, JavaScript and opportunity to learn GoLang

- Fareham, Hampshire. This is an in office role.

- Salary circa 45,000 - 65,000 plus benefits

Malware, Ransomware, Cryptojacking, Trojan Viruses.

In 2023, cybercrime cost UK businesses an estimated 21 billion. But don't think its the just the big corporates at risk, the average cybercrime value in the UK is just over 10,000 demonstrating that personal finance and small business cybercrime is rife.

Would you like to be part of the solution?

We are working with an award winning leader in the field of cyber security. They are on a mission to build a safer digital world for you and your future self! They have built a suite of innovative products designed to offer superior protection against a broad spectrum of online threats.

The role of Software Engineer is a new position in the team demonstrating the increasing demand for a robust cyber solution.

Working with a talented software team you will be helping to plan and develop security solutions, migration to improved cloud services and help with support and maintenance of security and storage services.

The work is aimed at more back end development with an emphasis on Agile processes, systems optimisation, TDD and embracing modern development practices. The company also uses PHPUnit / Selenium to ensure high standards of development.

On top of a competitive salary (approx 45k - 65k) the company offer some fantastic financial and lifestyle benefits including; free access to local gym, onsite chef (free cooked breakfast & lunch!), childcare vouchers, cycle to work scheme, pension, BUPA healthcare, investment in training and personal development.

Essential Skills & Experience

• Solid experience of object oriented programming
• Deep knowledge of PHP from version 5 upwards
• MySQL
• Golang
• Git

Beneficial Skills:

• Kubernetes
• GCP
• Docker
• Load Balancing
• TDD
• Code Review

Hit apply to upload your CV or contact Tom Rayner at Spectrum IT Recruitment to find out more about this exciting opportunity.

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

Full Stack Developer - React.js | Node.js | SQL Server
Location: Nottinghamshire, 2 days a week in office
Employment Type: Permanent
Salary: Based on experience

Due to continued success, I am looking for a skilled Mid-Level Full Stack Developer to join my clients growing team working on a modern, web-based platform. This is a hands-on role where you'll be building new applications and enhancing existing ones using React.js , Node.js , and SQL Server .

The role is offered on a hybrid basis, minimum 2 days a week in their Nottinghamshire office

What you'll be doing as a Full Stack Developer:

• Develop and maintain full-stack web applications with a focus on performance and scalability.
• Build responsive, data-driven UIs using React.js, consuming JSON APIs.
• Create and enhance backend services using Node.js.
• Work with complex business logic implemented in SQL Server stored procedures.
• Collaborate with cross-functional teams in an Agile/Scrum environment.
• Contribute to code reviews, documentation, and continuous improvement.

What experience you will need to have as the Full Stack Developer:

• Strong experience with React.js , Node.js , and SQL Server .
• Solid understanding of n-tier architecture and thin client design.
• Proficiency in JavaScript (ES6+) , RESTful APIs, and JSON.
• Experience integrating frontend components with backend APIs.
• Ability to work with and extend existing architecture (not re-architecting).
• Familiarity with SOLID principles , design patterns, and clean code practices.

Nice to Have:

• Experience with Bootstrap or Material UI .
• Exposure to CI/CD pipelines and automated testing tools (e.g. Cypress, Playwright).
• Understanding of software release processes and version control.

This is a great opportunity for someone who enjoys solving complex problems, working across the stack, and contributing to a high-performing development team.

Please apply with an updated CV

• Intergrate software components into a fully functional software system.
• Write clean, maintainable, and scalable code, utilizing modern software engineering practices and tools.
• Contribute significantly to the engineering lifecycle, including scoping, design, implementation, testing, deployment and maintenance of your team's work
• Collaborate with cross-functional teams to integrate software with hardware components.
• Participating in design reviews providing technical input through thedevelopment process.
• Coaching team members to improve capabilities and develop their software knowledge/expertise.
• Troubleshoot and resolve complex technical issues.
• Stay informed on current trends in the software development field and M-RAS and proactively explore their implementation within the company

• A degree in Software Engineering, Computer Science, Physics or Maths with a grade of at least a 2:1 or an equivalent qualification and experience.
• Proven experience in relevant industry that will complement and enhance RAS development
• Experience with Linux and developing real-time software in C/C++ or Python is essential.
• Experience of robotics, machine control systems and automation is desirable.
• A basic understanding of electronics and the ability to read electrical schematics is essential.
• Demonstrable knowledge and experience of current software engineering practices for RAS.
• Experience with ROS/ROS2, machine learning and OpenCV is advantageous.
• Knowledge of CODESYS or similar PLC software is beneficial.
• Experience working in a multi-disciplined engineering team.
• Ability to investigate and interpret data, issues, and situations, to make sound decisions in high-stress situations.
• Appetite for learning new technologies and applications.
• Ability to communicate complex procedures to colleagues.
• Self-motivating, proactive and results driven approach.
• Collaborative ethos is essential

AnexcitingopportunityexistsforexperiencedSoftwareEngineerstojoinadynamicteamworkingonabroadrangeofprojectswithinDefence,Cybersecurity,andIntelligencedomains.Thisroleoffersachancetodevelopadvancedsoftwaresolutionswhilemaintainingastrongbalancebetweenprofessionalandpersonallifethroughflexibleandhybridworkingoptions,backedbyacomprehensivebenefitspackage.

RoleHighlights:

• Engageinplanning,development,testing,debugging,anddocumentationofsoftwareacrossvariousdisciplines.
• Workcloselywithstakeholderstotranslatemission-criticalrequirementsintorobust,secureapplications.
• Applyindustry-standardpracticesthroughoutthefullsoftwaredevelopmentlifecycle,ensuringqualityandreliability.
• SpecialiseinareasincludingbutnotlimitedtoCybersecuritysoftwaredevelopmentandDevSecOpssystems.
• Troubleshootprogramerrors,prepareoperationaldocumentation,andanalyzesystemcapabilitiestooptimiseperformance.

TechStack&Tools:

• ProficientprogrammingexperienceinJavaandPython.
• ComfortabledevelopingonLinuxenvironments.
• SkilledinunittestingframeworkssuchasJUnit5andversioncontrol - Git
• FamiliaritywithAgilemethodologies,particularlyScrum.
• Experiencementoringjuniorteammembers.
• WorkingknowledgeofrelationalandNoSQLdatabasesincludingOracleandMongoDB.
• ExperiencewithCI/CDpipelines,preferablyusingGitLab.
• ExposuretofrontendframeworkslikeJavaScript,TypeScript,andReact.
• UseofdatavisualizationandsearchtoolssuchasElasticsearch & Kabana.
• FamiliaritywithHibernateandAtlassianSuite -Bitbucket,Jira,Confluence
• Advantageous:experiencewithJSF(Primefaces),cloudsoftwaredevelopment(AWS),microservices,serverlessarchitectures,andAWSserviceslikeEC2,EKS,Fargate,IAM,S3,Lambda.

Are you looking for an opportunity to shape the future of software quality in a forward-thinking company?

Are you experienced within C/C++ and Java?

If YES, you could be theSoftware Engineer we are looking for!

What are the benefits of a Software Engineer?

• Competitive salary
• Based in Kettering, Northants, this role offers a hybrid working option
• Career development opportunities
• Become a member of an Employee-owned trus
• Cycle to work scheme
• Option to buy additional leave
• Option to join Private medical insurance

What are your key responsibilities?

• Develop and maintain software applications that control our automated warehouse systems, ensuring high performance, scalability, and reliability.
• Collaborate with project managers, engineers, and clients to deliver tailored software solutions based on project specifications.
• Work on system integration and ensure that software interfaces smoothly with hardware and control systems.
• Conduct testing, troubleshooting, and debugging to optimise software performance and resolve issues.

What we are looking for?

• Degree in Computer Science, Software Engineering, or a related field.
• Experience in C/C++ and Java
• Competent in Linux (Unix) based operating systems and able to write shell scripts
• Experience with warehouse management systems (WMS) or automation systems is a bonus.

Apply now to start your next chapter!

Enhanced SC Cleared Software Engineer / Data Integration

Bristol or London (2 days per week onsite)

Up to 745 per day (Umbrella, Inside IR35)

Contract until 17th February 2026

Must hold live and transferrable Enhanced SC Clearance. We are unable to consider those with only BPSS or standard SC.

About the Role

We're looking for a highly skilled Software Engineer / Data Integration Specialist to join a mission-critical programme, ensuring data and services move seamlessly, securely, and efficiently across systems. This role blends backend software engineering with data integration expertise, offering the chance to work on high-impact projects within a collaborative, technically advanced environment.

Key Responsibilities

• Integration Development - Design, build, and maintain integrations between internal systems and third-party platforms via APIs and related technologies.
• Data Pipeline Engineering - Create scalable, reliable pipelines to ingest, transform, and deliver data across multiple environments.
• Collaboration - Work closely with software engineers, DevOps, and product teams to translate integration requirements into effective solutions.
• Troubleshooting & Optimisation - Resolve integration challenges including data mismatches, authentication issues, and performance bottlenecks.
• Documentation - Produce clear documentation for integration workflows, processes, and architecture.
• Monitoring & Maintenance - Implement robust logging, alerting, and performance monitoring for integrations.
• Continuous Improvement - Champion enhancements to integration architectures and best practices.

Skills & Experience Required

• Experience with workflow orchestration tools (e.g., Apache Airflow).
• Proven track record in backend development (e.g., Node.js, Python, Java).
• Strong knowledge of API design, integration methods (REST, Webhooks, GraphQL), and authentication protocols (OAuth2, JWT).
• Experience with ETL/ELT tools and frameworks.
• Solid database skills (SQL and/or NoSQL).
• AWS cloud platform experience, particularly in integration services.
• Strong debugging, problem-solving, and communication abilities.
• Comfortable in agile environments and familiar with CI/CD and DevOps practices.
• Understanding of data security, privacy, and compliance (e.g., GDPR).

Apply Now

Bring your software engineering and data integration expertise to a role where your work will make a measurable impact on secure, data-driven systems.