Senior C# DotNet Developer (Contract)

Added 30/09/2025

Sr C# .Net DeveloperDublin - Hybrid7+ years required€450/day - €500/day We're looking for a Senior C# developer with strong .NET experience to build and support cloud-ready applications. You'll work across Windows, Mac, and Linux, using AWS services, and you'll get to dive into Systems & Connectivity, Databases, and Software Integrity. If you enjoy clean, test-driven code, automation, and working with Git in a collaborative team, this role offers plenty of technical variety and real impact.GCS is acting as an Employment Business in relation to this vacancy.

Senior Backend Javascript Developer - Remote - outside IR35

Added 25/09/2025

Senior Backend JavaScript DeveloperOutisde IR35 Remote and once in the London office every 2 weeks Our client, an innovative and forward-thinking technology business, is looking for a Senior Backend JavaScript Developer to join their growing engineering team. This is a fantastic opportunity for a seasoned developer who thrives on solving complex problems, building scalable systems, and mentoring others in a collaborative, agile environment.You will play a pivotal role in shaping the backend architecture, delivering high-quality code, and ensuring the platform continues to perform at scale as the business expands globally. Key skillsStrong proficiency in JavaScript/TypeScript with proven backend development experience.Hands-on...

Senior C# DotNet Developer

Added 25/09/2025

Sr C# .Net DeveloperDublin - Hybrid7+ years required€70,000 - €80,000 base salary + benefits We're looking for a Senior C# developer with strong .NET experience to build and support cloud-ready applications. You'll work across Windows, Mac, and Linux, using AWS services, and you'll get to dive into Systems & Connectivity, Databases, and Software Integrity. If you enjoy clean, test-driven code, automation, and working with Git in a collaborative team, this role offers plenty of technical variety and real impact.GCS is acting as an Employment Agency in relation to this vacancy.

Senior C# .Net Developer (Legacy Migration) - Remote

Added 22/09/2025

For our client who is a leading global information services company, providing data and analytical tools to our clients around the world. we are looking for below hiring . JOB DESCRIPTION:Role : Senior C# .NET Developer (Oracle to PostgreSQL Migration Project)Duration : 6 months extendableLocation : Nottingham ( Fully Remote )Rates : £500 - 520 per day Inside IR35Overview:About the ProjectWe are undertaking a strategic transformation of a legacy system built on PHP and Oracle, migrating to a modern architecture using PostgreSQL and .NET (C#).* 5+ years of experience in .NET/C# development, with a strong focus on backend services and...

Senior Oracle Developer (C#/.NET)

Added 07/07/2025

Hi,We are hiring for below:JOB DESCRIPTION: 🚀 Now Hiring: Role: Senior Oracle Developer - Oracle to .NET (C#) Migration ProjectType: Contract Inside IR35 Location : Nottingham[ 1 day in office / week - Hybrid ]Rate : £500 - 560 p/d Inside IR35 Job DescriptionRequired Skills & Experience5+ years of experience developing in Oracle PL/SQL, including deep knowledge of stored procedures, triggers, and packages.Proven experience in migrating business logic from Oracle to .NET (C#), with a focus on re-architecture rather than direct translation.Strong understanding of Oracle internals and how database logic integrates with external systems.Experience migrating data from Oracle to other...

Senior Data Engineer

Added 01/10/2025

Role: Senior Data Engineer (Contract) Duration: 6 months - extension likely Location: [Remote] Start Date: ASAPAbout the Role: Our client, a leading organisation currently undergoing a merger, is seeking a Senior Data Engineer to join on a 6-month contract. The successful candidate will play a key role in a large-scale data integration project, focused on migrating and merging data into a central Snowflake data warehouse.Key Responsibilities:Design, build, and maintain data pipelines to support large-scale integrations.Develop and optimize data models with dbt (Core/Cloud).Support data migration and consolidation into Snowflake.Work closely with business and technical stakeholders to ensure data quality and consistency.Apply...

Senior Frontend Engineer (Angular)

Added 26/09/2025

Role Overview We are looking for an experienced Senior Frontend Engineer to design and deliver modern single-page web applications. The role involves shaping scalable client-side solutions, ensuring code quality, and working closely with cross-functional teams to build engaging user experiences. Role: Senior Frontend Engineer (Angular)Type: Permanent/Contract roleLocation: Dublin, Ireland (Hybrid) ResponsibilitiesDevelop and maintain interactive applications using a modern component-based framework.Design efficient architectures and implement best practices for performance and accessibility.Integrate with APIs and real-time data sources.Contribute to testing, code reviews, documentation, and agile ceremonies.Collaborate with engineers, designers, QA, and product stakeholders to deliver features.Skills & Tech5+ years building production-grade single-page...

Senior Network Engineer

Added 26/09/2025

Senior Network Engineer -Key ResponsibilitiesNetwork planning and design.Installation and configuration of complex network infrastructures.Designing and implementing security solutions based on industry-standard products.Configuring and maintaining firewall solutions, updating security systems to ensure data and communications protection.Acting as a point of escalation for advanced troubleshooting, supporting other team members in specialist networking areas.Designing and implementing disaster recovery processes.Staying current with networking and security best practices to deliver optimum protection and solutions.Creating and maintaining accurate network documentation.Supervising network implementations.Supporting presales activities by providing technical input.Contributing to overall technical excellence within the IT function.Skills & Experience RequiredStrong knowledge in networking and security.Familiarity with diagnostic...

Senior MacOS Networking Engineer

Added 23/09/2025

Role - Outside IR35, candidates must have their own Ltd Company, this role is fully remote working.Job Title: Senior macOS Networking EngineerMy client is seeking an experienced macOS developer with deep expertise in the networking stack. The role involves designing and implementing a system-level networking module capable of intercepting, analyzing, and transforming data flows. The engineer will be responsible for evaluating the best technical approach available within macOS frameworks and delivering a production-ready solution.ResponsibilitiesEvaluate and recommend the most suitable macOS networking framework or extension type to achieve project goals.Design and implement a robust module for real-time interception and transformation of...

Senior DevOps Engineer - AI Project

Added 20/09/2025

Staff AI DevOps EngineerAbout the Role We're looking for a Staff AI DevOps Engineer to help build and scale the backbone of a next-generation AI platform for our client. This is a hands-on leadership role where you'll design and implement automation, CI/CD, and Infrastructure as Code (IaC) to enable secure, rapid deployment of intelligent agents and AI workloads at scale.You'll be driving the adoption of modern DevOps, DevSecOps, and MLOps practices across the stack - ensuring infrastructure is reliable, observable, and cost-efficient while supporting continuous delivery of high-performance AI solutions.What You'll DoDesign and manage CI/CD pipelines to accelerate delivery of...

Senior Incident Response

Added 19/09/2025

Incident Response Consultant - Cybersecurity Services Our client, a leading consulting firm, is expanding their Cyber Incident Response practice and seeking experienced professionals with strong Forensics and eDiscovery expertise. ResponsibilitiesLead and manage cyber incident response engagements, providing both technical expertise and guidance.Support clients in preparing, detecting, analysing, containing, and recovering from a wide range of threats such as ransomware, data breaches, and account compromise.Deliver compromise assessments and proactive threat hunting services.Contribute to the design of realistic incident response simulations and tabletop exercises.Help evolve the incident response practice and service offerings by identifying emerging technologies and methodologies.Stay current with the latest...

Senior Information Security Advisor

Added 12/09/2025

Senior Information Security AdvisorJob PurposeTo deliver Information Security services for clients, to strengthen and advance their information security posture, by providing technical information security advice and guidance. You may also provide support and advice internally on meeting organisational and product specific information security obligations. Your expertise will be vital in improving information security practices in a range of diverse, high-profile organisations across Europe.Key AreasInformation Security Support ActivitiesIndependently lead information security projects at the intersection with other data governance requirements, including:Delivering effective risk identification, management and remediation for clients, including complying with data protection requirements.Developing and updating information security policies, frameworks...

Senior Reliability & Cloud Operations Engineer

Added 04/09/2025

Role Overview We are seeking a highly skilled Senior Reliability & Cloud Operations Engineer to ensure the reliability, security, and scalability of a large-scale SaaS platform hosted in the cloud. You will play a key role in maintaining 24/7 uptime, optimizing infrastructure, automating deployments, and resolving complex issues. The role requires deep cloud expertise, strong DevOps practices, and close collaboration with support and engineering teams. This is a permanent, full-time position in a fast-paced and dynamic environment. Role type: Permanent roleLocation: Dublin or Galway, Ireland (Once a week onsite) Key ResponsibilitiesManage and optimize cloud-based (AWS expert) infrastructure to ensure high...

Senior Process Engineer

Added 26/08/2025

We are seeking an experienced Senior Process Engineer to join our operations team, working closely with both product development and manufacturing groups to design and implement next-generation, high-performance production processes. This position will play a key role in multiple projects, from early concept development and automation through to scaled deployment on the production floor. Role type: Contract - 12 monthsLocation: Dublin, Ireland (Hybrid) Core ResponsibilitiesDesign and implement reliable, high-yield processes that consistently achieve product quality and efficiency targets.Optimize equipment and process technologies to ensure successful scale-up from pilot to full production.Partner with product design teams to ensure smooth transfer of...

Senior Product/UX Designer

Added 21/08/2025

Role: Sr Product Designer- UX/UI DesignerType: 3 months - Contract (Inside ir35)Nature: Hybrid (1/2 days in London per week) About the Role We're looking for a Senior/Lead Product/UX Designer to join our team on a 3-month contract, supporting the development of our clients subscription-based products in the UK market. You'll lead discovery and design focused on differentiating our free and premium experiences, helping customers understand the value of upgrading while ensuring clarity and trust. You'll collaboratively help us define user centred, commercially impactful patterns of our freemium model, and rules around how we implement these patterns.You'll work closely with stakeholders...