Java Developer (Back end engineer)

Added 17/09/2025

Hiring: Java DeveloperType: Contract Inside IR35 -12 months ExtendableExperience : 3+yearsLocation : Farnborough, UK [ Hybrid - 2 days onsite / week ]Rate : GBP 300 - 420 /day Inside IR35ResponsibilitiesAnalyze, design, program, test, and deploy new user stories and features with high quality (security, reliability, operations) to productionTends to Associate Application Engineers by providing learning tasks as well as work related tasks, directs the work of Senior Associate Application Engineers, and helps them continue to growAchieves team commitments (and influence others to do the same) by using informal leadership & highly developed communication skillsHas an oversight on design decisions...

Python Engineer- back end - fully remote

Added 17/09/2025

Python Engineer Back End - Agentic AI & ChatbotsFully remote My client are seeking a Python Back End Engineer with strong Python experience who has worked on AI projects, particularly in the realm of agentic AI or chatbot development. You will be responsible for building and maintaining scalable backend systems that power intelligent conversational agents, integrating advanced AI models into production environments.Key skills:Develop and maintain Python-based backend services supporting agentic AI and chatbot functionalities.Proven backend engineering experience with Python, ideally in AI-driven projects involving conversational agents or chatbots.Understanding of agentic AI concepts, dialogue systems, or autonomous AI workflows.Design and implement...

Senior Java Engineer - Fintech - Remote - Contract or Perm

Added 20/10/2025

Senior Java Engineer - Fintech - Remote - Contract or PermLocation: Remote / UK-based Contract Length: 6-12 months (initial) Start Date: ASAPWe're looking for a Contract Java Engineer to join the team - a high-performing, cross-functional team of UX Designers, Software Engineers, QA Engineers, and Technical Writers.You'll be contributing to the Engagement Banking Platform, delivering new features, proof-of-concepts, and technical improvements across a suite of digital banking products. This is a hands-on engineering role where you'll take ownership from design through to release, working within a modern microservices environment.The RoleAs part of an autonomous Agile team, you'll:Design, build, and deliver...

Delivery Manager - Java / Spring Boot Migration to Kubernetes

Added 14/10/2025

Delivery Manager - Java / Spring Boot Migration to Kubernetes (GCP) Contract Our client, a global technology organisation, is migrating a core on-premise Java Spring Boot application to Kubernetes on Google Cloud Platform (GCP). They're seeking an experienced Delivery Manager to lead this critical modernisation initiative. Role OverviewYou'll manage the end-to-end delivery of the migration, coordinating cross-functional engineering, DevOps, and architecture teams. The role requires strong delivery leadership, technical awareness, and experience driving outcomes in complex, cloud-focused environments. Key Skills & ExperienceProven track record delivering cloud or platform migrations (on-prem to cloud).Solid understanding of Java / Spring Boot, Kubernetes, and...

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 .NET/C# Developer

Added 07/07/2025

Role: Sr Developer C# .Net DeveloperType: Contract (Inside IR35)Nature: Hybrid (1 day per week in Nottingham) Overview of the role- Required Skills & Experience5+ years of experience in .NET/C# development, with a strong focus on backend services and data access layers.Proven experience in migrating legacy systems, especially from Oracle to PostgreSQL or similar.Strong understanding of PL/SQL and experience translating stored procedures into application logic.Familiarity with PostgreSQL, including performance tuning and SQL dialect differences.Experience working in hybrid environments where legacy and modern systems coexist.Comfortable using AI tools (e.g., GitHub Copilot, ChatGPT, code translators) to assist in development and migration tasks.Solid understanding...

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 AI Platform & Automation Engineer

Added 16/10/2025

About the Role: Join an innovative technology team building the automation backbone behind next-generation intelligent systems. This position focuses on creating seamless deployment pipelines, scalable infrastructure, and observability solutions to support advanced machine learning and AI workloads. You'll play a key role in driving secure, cost-efficient, and high-performance environments that enable rapid experimentation and production readiness at scale. Role: Senior AI Platform & Automation EngineerType: Permanent/Contract roleLocation: Dublin, Ireland (Hybrid) What You'll Do:Design, implement, and maintain automated build and release pipelines to accelerate delivery cycles.Develop and manage infrastructure through code-driven provisioning and version-controlled configuration.Build and support container-based systems, optimizing workloads...

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...