Software Engineering Lead- Javascript, AWS- outside IR35

Added 17/03/2026

Software Engineering Lead - Backend (JavaScript / TypeScript, Node.js, AWS, Kafka)Outside IR35Remote with 2 days a month in the office in LondonWe're looking for an experienced Software Engineering Lead with a strong backend development background to lead the delivery of scalable, cloud‑native systems.Key skills:Strong commercial experience with JavaScript, TypeScript, and Node.jsProven experience building event‑driven systems using KafkaStrong AWS experience across modern cloud servicesBackground designing and operating microservices / distributed systemsHands‑on technical leader with experience mentoring engineers and leading deliveryRole overview:Lead backend architecture and development while remaining hands‑onDrive best practices through code reviews and technical leadershipWork closely with Product, DevOps, and...

2nd Line Engineer- Hybrid (Outside IR35)

Added 20/04/2026

Essential RequirementsReliability and infrastructure services. Focus on patching of vulnerabilities with our digital Windows and WMWare environment within our data centers and Cloud environments. Service Scope and DeliverablesSystem and application patching on the following technologies:Citrix.Hardware.VMWare.Windows Server.M365.Core data centre services such as AD, Group Policy, DNS, VPN, AV, MFA, WSUS, SCCM, monitoring tools etc.SAN storage and backup.Multi Factor Authentication.MS AzureVulnerability assessment and patch identification.Patch prioritisation and risk scoringPatching using technologies WSUS and Tanium.Testing and deploying patching to ensure they do not impact productionConfirmation and validation of successful patch deploymentCreation and input into RFC process as part of ITSMGCS is acting as...

Fractional CISO - FinTech (Contract / Outside IR35)

Added 07/04/2026

Fractional CISO - FinTech (Contract / Outside IR35)Location: London (Fully Remote) Engagement: Fractional (2-3 days per week) Duration: 6-12 Months Rate: £1000pd+ (Outside IR35)The OpportunityGCS Cyber are partnering with a rapidly growing PE backed FinTech firm as they scale their security capability and mature their overall cyber posture.This is a Fractional CISO engagement, ideal for a senior security leader who can provide strategic direction while remaining hands-on where needed.You'll be working closely with the executive team, helping shape security strategy in line with business growth, regulatory expectations, and investor confidence.Key ResponsibilitiesDefine and lead the cyber security strategy and roadmapEngage with...

OT Cyber Security Engineer (Outside IR35)

Added 07/04/2026

OT Cyber Security Engineer - Contract (Outside IR35)Location: UK (Remote with occasional travel) Duration: 12 Months Rate: Competitive (Outside IR35)The OpportunityWe're supporting a major programme within the OT / Industrial Cyber Security space, delivering security improvements across critical environments.This is a project focused contract, ideal for an experienced OT Cyber Security Engineer who has worked within live industrial environments and understands the challenges of securing legacy and operational systems.Key ResponsibilitiesDeliver OT security improvements across industrial environmentsSupport security assessments, risk identification, and remediation activitiesWork closely with engineering and operational teams to implement controlsContribute to network segmentation, asset visibility, and monitoring initiativesSupport...

Lead Software Engineer- outside IR35

Added 18/03/2026

Lead Software Engineer (Backend) JavaScript/TypeScript, AWS, Kafka Outside IR35 ContractMy London based client is urgently looking for an experienced Lead Software Engineer with a strong back-end focus to lead the build and evolution of scalable, cloud-native services. You'll set technical direction, mentor engineers, and stay hands-on delivering production code.What you'll do:Lead backend design and development (Node.js, TypeScript/JavaScript)Build and operate event-driven microservices using KafkaOwn AWS-based delivery (scalability, performance, reliability, security)Drive engineering standards: code reviews, testing strategy, CI/CD, observabilityPartner with Product/Architecture to translate requirements into robust solutionsKey skills:Strong commercial backend experience with JavaScript/TypeScript (Node.js)Kafka experience (event-driven systems, distributed messaging)Strong AWS experience across...

Full Stack Developer (.Net/JavaScript)

Added 23/04/2026

Job Title: Senior .NET/JavaScript Full Stack Developer Location: Limerick (Hybrid 2 days flexible) Type: 6 Months contract (with possible extension)Overview: We are seeking a highly skilled Senior Full Stack Developer with strong expertise in .NET and JavaScript to join our dynamic engineering team. The ideal candidate will have a proven track record of building scalable web applications and delivering high-quality code across the full stack. Key Responsibilities:Design, develop, and maintain full-stack web applications using .NET (C#) and JavaScript frameworks (e.g., React, Angular, or Vue).Collaborate with cross-functional teams to define, design, and ship new features.Ensure the performance, quality, and responsiveness of...

Automation Test Engineer - (IAM)

Added 26/05/2026

Role Summary We are looking for a highly skilled Automation Test engineer with expertise in Identity and Access management (IAM) back-end validation. Skilled in identity orchestration, API testing, data ingestion and transformation, and event-driven (Pub/Sub) architectures. This role focuses on testing secure, scalable identity and access workflows across Google Cloud Platform, integrating identity services with custom APIs, Pub/Sub pipelines, and cloud-native applications.Using an automation first approach, you will collaborate closely with tech leads, Cloud Security, DevOps, and Application Engineering teams to thoroughly test robust IAM, identity lifecycle workflows, and secure service integrations that support enterprise-level cloud and Identity operations. Key...

Test Automation Engineer

Added 26/05/2026

Build and maintain automated test frameworks and suites for API, event-driven, and graph-based services using Python/PyTest.Define and execute test plans, cases, and test data aligned to requirements and technical specifications, ensuring FR/NFR traceability.Validate IAM models (RBAC, ABAC, ReBAC, PBAC) and test policy-as-code decision points.Perform API automation, contract testing, and event replay/reprocessing scenarios.Validate graph data structures (nodes, relationships, traversal logic); Neo4j experience preferred.Produce regulatory evidence and support test governance, including entry/exit criteria.Develop and manage Jenkins pipelines for test execution and reporting within CI/CD.Log, track, and drive defect resolution using JIRA/Zephyr, ensuring clear stakeholder communication.Collaborate with Cloud Security, DevOps, and Engineering teams...

Test Manager

Added 08/05/2026

Testmanager - Complex IT‑integratieprogrammaLocatie: Rotterdam (hybride)Duur: 12 maanden (verlenging mogelijk, tot 24 maanden)OpdrachtomschrijvingVoor een groot en complex IT‑transformatieprogramma zijn wij op zoek naar een ervaren Testmanager met een sterke achtergrond in enterprise‑systeemintegraties en ketentesten. De opdracht richt zich op het aansturen en coördineren van testactiviteiten rondom de integratie van SAP‑oplossingen met een breed IT‑applicatielandschap.Je fungeert als centraal coördinatiepunt voor alle testactiviteiten aan de klantzijde en werkt nauw samen met de testmanager van de implementatiepartner. De omgeving is multi‑vendor, sterk geïntegreerd en vereist krachtig stakeholdermanagement, overzicht en assertiviteit.VerantwoordelijkhedenAfstemmen met applicatie‑eigenaren, functionele teams en externe leveranciers over testuitvoeringCoördineren en aansturen van integratie-,...

Test Lead

Added 19/06/2026

Test Lead - International QA (Banking)Join our global QA team as a Test Lead driving quality across complex financial platforms.What you'll bring:Proven background leading testing in international teams, ideally within finance or bankingStrong experience as a Software Tester across enterprise systemsHands‑on .NET UI automation using Selenium WebDriver/GridDeep expertise in API testingSolid understanding of CI/CD with practical Jenkins pipeline configurationStrong grounding in testing best practices: SOLID, TDD, POM/Page Factory, structured test data (CSV/YAML/JSON), JDBC integrationConfident working with SQL and relational databases in a QA contextGCS is acting as an Employment Business in relation to this vacancy.

UAT Test Lead (Cloud Desktop Technology)

Added 18/06/2026

- Test lead, ability to lead UAT end to end, taking a user story, creating test cases, testing, producing test outputCloud desktop technology - experience preferred. Leading E2E UAT from scratchGCS is acting as an Employment Business in relation to this vacancy.

Docsis RF Test Engineer

Added 16/04/2026

Looking for a Docsis RF Test Engineer, Validation Engineer, Device Certification Engineer, or RF Engineer with experience testing RF performance or signal strength across wireless technologies (e.g., modems, Wi-Fi, or similar devices). Experience working in a lab environment is preferred but not required. Candidates should have familiarity with networking technologies (such as DOCSIS or similar standards). In this role, you will collaborate with network platforms and test systems, execute test plans, troubleshoot issues, and support certification readiness.GCS is acting as an Employment Business in relation to this vacancy.

Docsis RF Test Engineer

Added 16/04/2026

The role is a Senior RF DOCSIS Test EngineerEnvironment: CableLabs Certification Lab Position OverviewWe are seeking a highly skilled DOCSIS PHY Certification Engineer to support hands‑on certification testing within the CableLabs certification lab in Louisville, Colorado. This role is focused on executing and supporting DOCSIS physical layer (PHY) certification testing for cable modems and CPE devices in a true HFC cable environment.The ideal candidate will have strong, practical experience with DOCSIS RF testing, lab setup, troubleshooting certification failures, and documentation. This is a lab‑based role requiring daily interaction with test platforms, CMTS systems, and HFC plant simulators. Key ResponsibilitiesDOCSIS Certification...

Test Engineer

Added 14/04/2026

3 open vacancies- Automation Test Engineer/ Senior Automation Test Engineer/ Senior Non-Functional Test Engineer.These roles can be performed either from Northampton or Knutsford.Role Purpose: To design, develop, and execute testing strategies to validate functionality, performance, and user experience, while collaborating with cross-functional teams to identify and resolve defects, and continuously improve testing processes and methodologies, to ensure software quality and reliability.Responsibilities: * Development and implementation of comprehensive test plans and strategies to validate software functionality and ensure compliance with established quality standards. * Creation and execution automated test scripts, leveraging testing frameworks and tools to facilitate early detection of defects...

Senior RF DOCSIS Test Engineer - Certification & Lab Validation

Added 09/04/2026

Senior RF DOCSIS Test Engineer - Certification & Lab ValidationWe are seeking an experienced Senior RF DOCSIS Test Engineer to support certification and validation of broadband devices within a high-performance lab environment. This role focuses on DOCSIS RF/PHY layer testing, device interoperability, and ensuring compliance with industry certification standards.You will work closely with cross-functional engineering teams and external stakeholders to validate cable modems, gateways, and network devices across HFC architectures, supporting product readiness for large-scale operator deployment.Key ResponsibilitiesExecute RF and PHY layer certification testing for DOCSIS 3.0 / 3.1 devices, including modems and gatewaysDesign, develop, and maintain test environments, procedures,...