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Senior Front-End Developer

Onze klant is op zoek naar een Senior Front-End Developer om een dynamisch technologieteam te versterken binnen een hybride werkomgeving. In deze rol ligt de focus op het ontwikkelen en onderhouden van moderne webapplicaties, het samenwerken met multidisciplinaire teams en het bijdragen aan de oplevering van schaalbare digitale oplossingen.

VerantwoordelijkhedenOntwikkelen en onderhouden van responsieve webapplicaties van hoge kwaliteit.Samenwerken met ontwikkelaars, designers en stakeholders om gebruiksvriendelijke oplossingen te realiseren.Deelnemen aan technische discussies en bijdragen aan architecturale beslissingen.Schrijven van schone, onderhoudbare en efficiënte code volgens best practices.Bijdragen aan de continue verbetering van applicatieprestaties, betrouwbaarheid en gebruiksvriendelijkheid.Junior teamleden begeleiden en ondersteunen waar nodig.Actief deelnemen aan code reviews, testen en deploymentactiviteiten.Vereiste ErvaringAantoonbare ervaring als Front-End Developer binnen enterprise- of commerciële omgevingen.Grondige kennis van moderne JavaScript-frameworks en webontwikkelingsprincipes.Ervaring met het bouwen van schaalbare en responsieve gebruikersinterfaces.Vermogen om effectief samen te werken binnen Agile ontwikkelteams.Sterke probleemoplossende en communicatieve vaardigheden.Gewenste Technische VaardighedenAWSJavaScriptReact.jsNest.jsWat Deze Kans Uniek Maakt

Wat deze functie bijzonder aantrekkelijk maakt, is de mate van verantwoordelijkheid en invloed die zij biedt. De succesvolle kandidaat zal niet alleen functionaliteiten ontwikkelen, maar ook een belangrijke rol spelen in de verdere vormgeving van het product, het definiëren van processen, het sturen van technische beslissingen en het bepalen van de meest effectieve manier van werken. Dit is een uitstekende kans om als sleutelspeler een directe impact te hebben op zowel het product als de toekomstige richting van het team.

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Senior Front-End Developer

We are looking for a Senior Front-End Developer to join a dynamic technology team in a hybrid work environment. This role will focus on building and maintaining modern web applications, collaborating with cross-functional teams, and contributing to the delivery of scalable digital solutions.

Key ResponsibilitiesDevelop and maintain responsive, high-quality web applications.Collaborate with developers, designers, and stakeholders to deliver user-focused solutions.Participate in technical discussions and contribute to architectural decisions.Write clean, maintainable, and efficient code following development best practices.Support the continuous improvement of application performance, reliability, and usability.Mentor and provide guidance to junior team members where required.Contribute to code reviews, testing, and deployment activities.Required ExperienceProven experience as a Front-End Developer in enterprise or commercial environments.Strong knowledge of modern JavaScript frameworks and web development principles.Experience building scalable and responsive user interfaces.Ability to work effectively in agile development teams.Strong problem-solving and communication skills.Preferred Technical SkillsAWSJavaScriptReact.jsNest.jsWhat Makes This Opportunity Exciting

What makes this role particularly exciting is the level of ownership and influence it offers. This person won't simply be developing features; they'll have a real say in shaping the product, defining processes, driving technical decisions, and helping determine the best way of working moving forward. This is an opportunity to be a key contributor whose ideas and expertise will directly impact both the product and the team's future direction.

GCS is acting as an Employment Agency in relation to this vacancy.

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Senior Front-End Developer

We are looking for a Senior Front-End Developer to join a dynamic technology team in a hybrid work environment. This role will focus on building and maintaining modern web applications, collaborating with cross-functional teams, and contributing to the delivery of scalable digital solutions.

Key ResponsibilitiesDevelop and maintain responsive, high-quality web applications.Collaborate with developers, designers, and stakeholders to deliver user-focused solutions.Participate in technical discussions and contribute to architectural decisions.Write clean, maintainable, and efficient code following development best practices.Support the continuous improvement of application performance, reliability, and usability.Mentor and provide guidance to junior team members where required.Contribute to code reviews, testing, and deployment activities.Required ExperienceProven experience as a Front-End Developer in enterprise or commercial environments.Strong knowledge of modern JavaScript frameworks and web development principles.Experience building scalable and responsive user interfaces.Ability to work effectively in agile development teams.Strong problem-solving and communication skills.Preferred Technical SkillsAWSJavaScriptReact.jsNest.jsWhat Makes This Opportunity Exciting

What makes this role particularly exciting is the level of ownership and influence it offers. This person won't simply be developing features; they'll have a real say in shaping the product, defining processes, driving technical decisions, and helping determine the best way of working moving forward. This is an opportunity to be a key contributor whose ideas and expertise will directly impact both the product and the team's future direction.

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Full Stack Developer (Contract)

Location: Remote (UK)
Contract Length: 6 Months
Day Rate: £400 per day OUTSIDE IR35
Tech Stack: C#, SQL, Vue.js

Overview

We are seeking an experienced Full Stack Developer to support the re-engineering and modernisation of a core business platform. The successful candidate will play a key role in migrating an existing application from .NET Framework 4.1 to .NET 10, helping to improve performance, scalability, maintainability and cloud readiness.

Working within an agile development team, you will contribute across the full software development lifecycle, from architecture and design through to development, testing and deployment.

Key Responsibilities

Redevelopment and modernisation of an existing platform from .NET Framework 4.1 to .NET 10.Design, develop and maintain scalable web applications using C#, SQL Server and Vue.js.Collaborate with business stakeholders, architects and developers to define technical solutions.Refactor legacy code and implement modern development practices.Develop and consume RESTful APIs and backend services.Optimise database performance and maintain SQL Server environments.Participate in code reviews, testing and release activities.

Essential Skills & Experience

Strong commercial experience developing applications using C#.Experience with SQL Server, including:Proven experience developing front-end applications with Vue.js.Experience working on full software development lifecycle projects.Demonstrable experience modernising or upgrading legacy applications.

Desirable Skills

Experience with Microsoft Azure services.Knowledge of Azure DevOps and CI/CD pipelines.Experience containerising applications using Docker and Kubernetes.Experience with microservices architecture.Exposure to Entity Framework Core.

Ideal Candidate

Comfortable working in a fast-paced project environment.Proven track record of delivering platform modernisation projects.Able to work independently whilst collaborating effectively within a wider team.Strong attention to detail with a focus on quality and maintainability.

Technical Environment

.NET Framework 4.1 → .NET 10 MigrationC#SQL ServerVue.jsAzure (desirable)

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Full Stack Software Engineer (React | Go/Node.js/Python | AWS)About the Role

We are looking for an experienced Full Stack Software Engineer to join a collaborative engineering team building modern, scalable web applications. This role combines frontend development, backend engineering, cloud technologies, and AI-driven solutions, offering the opportunity to work on innovative products that include live video capabilities and intelligent automation.

You will work closely with Product Managers, UX Designers, and fellow Engineers to deliver high-quality features that provide an exceptional user experience while maintaining robust, scalable backend services.

Key Responsibilities

Design, develop, and maintain responsive web applications using React.js.

Build intuitive, high-performance user interfaces with a strong focus on usability and accessibility.

Develop and maintain backend APIs and services using Go (Golang), Node.js, or Python.

Collaborate with Product Managers, Designers, and Engineering teams to define, develop, and deliver new features.

Ensure seamless integration between frontend applications and backend services.

Build, deploy, and maintain cloud-based applications using AWS.

Develop and support microservices and distributed systems using modern cloud-native technologies.

Participate in code reviews, testing, debugging, and continuous improvement to ensure high-quality software.

Contribute to CI/CD pipelines and deployment automation.

Produce clear technical documentation for system designs, APIs, and development workflows.

Work closely with UX Designers to ensure features are delivered in line with the original design intent.

Essential Skills & Experience

Strong commercial experience developing full stack web applications.

Expertise with React.js and modern JavaScript/TypeScript.

Experience developing backend services using Go (preferred), Node.js, or Python.

Strong understanding of RESTful APIs and system integration.

Experience working with AWS cloud services.

Knowledge of microservices architecture and distributed systems.

Experience with Kubernetes and containerised applications.

Familiarity with CI/CD pipelines and DevOps best practices.

Strong debugging, testing, and problem-solving skills.

Excellent communication skills and experience working within Agile development teams.

Desirable Experience

Experience developing live video, streaming, or real-time communication platforms.

Experience with video editing technologies or media processing.

Hands-on experience building AI-powered applications, including LLM agents.

Experience implementing solutions using the Model Context Protocol (MCP).

Exposure to modern AI frameworks and agentic workflows.

What We're Looking For

The successful candidate will be a proactive engineer who enjoys solving complex technical challenges and working across the full software development lifecycle. You'll be passionate about building scalable applications, collaborating with cross-functional teams, and embracing emerging technologies such as AI and cloud-native platforms.

If you're excited by the opportunity to work on cutting-edge products that combine modern web development, cloud infrastructure, AI, and video technologies, we'd love to hear from you.

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

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**Job Title: Senior QA Automation Engineer (Full-Stack Quality Engineer)**

### About the Role
We are seeking a highly skilled **QA Automation Engineer** to join our engineering team. In this role, you will design, develop, and maintain robust automated testing solutions for complex, modern web applications built on microservices architecture. You will bridge development and quality by writing production-grade code for test automation, ensuring high reliability, scalability, and performance across our stack. This is a hands-on, code-heavy position ideal for someone who loves both testing and software engineering.

### Key Responsibilities
- Develop, maintain, and scale end-to-end (E2E), API, integration, and performance test automation frameworks.
- Build and enhance automated test suites using JavaScript/TypeScript test automation libraries.
- Design testing strategies for microservices architectures, including contract testing, service virtualization, and distributed system validation.
- Collaborate closely with backend (Java/Node.js) and frontend (React) developers to implement shift-left testing practices.
- Perform manual exploratory testing when needed and mentor team members on best practices.
- Integrate automated tests into CI/CD pipelines, Git Actions and monitor test execution, flakiness, and coverage.
- Analyze test results, troubleshoot failures, and drive continuous improvement in quality processes.
- Work with databases for test data management and validation.

### Required Qualifications and Skills
- **Strong Programming & Automation Expertise**:
- Proficiency in **JavaScript/TypeScript** and experience with top JavaScript test automation libraries such as **Playwright** (preferred for its reliability and modern features), **Cypress**, or **Selenium/WebDriverIO**.
- Ability to develop clean, maintainable, production-grade automation code (Page Object Model, custom frameworks, etc.).

- **Backend & Languages**:
- Solid understanding of **Java** and functional programming concepts.
- Experience with **Node.js**, **Express**, and related ecosystems.

- **Frontend**:
- Hands-on experience with **React** for component and E2E testing.

- **Databases**:
- Strong experience with **PostgreSQL** (queries, schema validation, data integrity testing).
- Working knowledge of **MongoDB**.

- **API & Tools**:
- Expert-level experience with **Postman** and **Insomnia** for API testing, collection management, and automation.
- Familiarity with REST, GraphQL, and related testing practices.

- **Architecture**:
- Deep familiarity with **microservices architecture**, including challenges like inter-service communication, resilience, and contract testing (e.g., Pact).
- Understanding of Hashicorp tech stack.

### Highly Valued Tools & Technologies (Top Performer Toolkit)
Top-performing QA professionals in 2026 leverage a modern, integrated toolchain. Experience or quick proficiency in the following is a big plus:

- **Test Automation**: Playwright, Cypress, Selenium, WebDriverIO, Appium (for any mobile needs).
- **API & Contract Testing**: Postman, Supertest, Pact, WireMock, REST Assured.
- **Performance & Load**: JMeter, k6.
- **CI/CD & DevOps**: Jenkins, GitHub Actions, GitLab CI, Docker, Kubernetes basics.
- **Test Management & Reporting**: TestRail, Allure, or similar.
- **AI-Powered & Emerging Tools**: Exposure to AI-assisted testing (e.g., self-healing, test generation in tools like Mabl, Katalon, or QA Wolf), visual testing (Applitools), or agentic automation.
- **Other Utilities**: Git, Jira/Linear, BrowserStack or similar cloud testing platforms, Charles/Fiddler for proxy debugging, Lighthouse for performance.

### Ideal Candidate Profile
- 4+ years of experience in QA automation, with a strong emphasis on coding and framework development.
- Bachelor's degree in Computer Science, Engineering, or equivalent experience.
- Excellent problem-solving, critical thinking, and communication skills.
- Passion for quality, reliability, and staying current with industry trends (AI in testing, shift-left, observability).

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Senior Full Stack Developer - Identity & Access ManagementPosition Summary

We are seeking an experienced Senior Full Stack Developer to join a high-performing engineering team supporting enterprise Identity & Access Management (IAM) applications within a large-scale security organization. This role will focus on the design, development, integration, and modernization of secure enterprise applications used internally across the organization.

The ideal candidate will possess strong expertise across both frontend and backend development, with deep experience in Angular, Java, Spring Boot, REST API development, cloud-native AWS services, and secure application development practices. This individual will play a key technical leadership role within the team, mentoring junior developers, contributing to architectural decisions, and driving secure, scalable cloud migration initiatives.

This is an opportunity to work within a security-first engineering environment responsible for mission-critical IAM platforms and integrations.

Key ResponsibilitiesDesign, develop, enhance, and maintain enterprise IAM applications and integrationsBuild scalable frontend applications using modern Angular frameworksDevelop secure backend services and REST APIs using Java and Spring BootParticipate in cloud migration and modernization initiatives, including transitioning legacy applications to AWS cloud-native architecturesCollaborate with architecture teams, security stakeholders, and cross-functional engineering teamsLead technical discussions, contribute to solution design, and drive engineering best practicesMentor and support junior and mid-level developers within the teamEnsure applications meet security, compliance, and enterprise development standardsImplement secure authentication and authorization mechanisms using industry-standard protocolsParticipate in code reviews, troubleshooting, testing, and deployment activitiesSupport CI/CD, monitoring, and containerized deployment environmentsRequired Skills & ExperienceBackend DevelopmentStrong hands-on experience with Java developmentExperience with Java 17 or newerExtensive experience with Spring Boot and Spring ecosystem frameworksStrong expertise designing and developing secure REST APIsExperience building enterprise-grade backend servicesFrontend DevelopmentStrong experience with Angular (Angular 21/22 preferred or recent versions)Experience developing enterprise UI applicationsStrong understanding of frontend architecture and component-driven developmentCloud & DevOpsHands-on experience with AWS cloud services, including:AWS LambdaDynamoDBS3CloudWatchECS/FargateExperience with cloud-native and serverless application developmentExperience with Docker/containerization technologiesExperience supporting application cloud migration initiativesSecurity & IAMStrong understanding of Identity & Access Management conceptsExperience implementing secure authentication and authorization solutionsKnowledge of:OAuth 2.0OpenID Connect (OIDC)JWT token-based authenticationSpring SecuritySecurity-first development mindset with experience following secure coding and compliance standardsDatabases & CachingStrong experience with MySQLExperience with MongoDBExperience with Redis or caching technologiesLeadership & Soft SkillsProven ability to lead technical initiatives and mentor development teamsAbility to work independently and drive solutions with minimal oversightStrong communication and stakeholder management skillsExperience collaborating with architecture, security, and DevOps teamsAbility to contribute to technical design and architectural decision-makingPreferred QualificationsPrevious experience working within IAM or enterprise security environmentsExperience modernizing legacy applications into cloud-native architecturesExperience leading or mentoring development teamsFamiliarity with enterprise compliance and secure development standards

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BACKEND SOFTWARE ENGINEER

Job Title: Backend Software Engineer Location: Burnsville, MN Industry: Manufacturing / Automation / Fiber Optics

Detailed Job Description:

We are seeking a Backend Software Engineer to join a growing automation engineering team developing custom manufacturing equipment for a high-volume fiber optics production environment. This role is focused on backend software development supporting industrial automation systems, equipment control, data acquisition, and manufacturing process integration.

You will work alongside mechanical, electrical, and controls engineers to develop the software systems that drive custom automation equipment - from machine-level control applications to data collection, reporting, and integration with manufacturing execution systems. This position is based onsite in the southwest metro area of Minneapolis and supports global manufacturing operations.

Key Responsibilities:

Design, develop, and maintain backend software applications that support custom automation equipment and manufacturing processesDevelop software for equipment control, data acquisition, and process monitoring in an industrial manufacturing environmentBuild and maintain integrations between automation equipment, databases, and manufacturing execution systems (MES)Design and implement data pipelines for collecting, storing, and processing equipment and production dataCollaborate closely with controls engineers, electrical engineers, and mechanical engineers to ensure seamless software integration with automation hardwareDevelop data collection and reporting tools to support equipment qualification, process development, and production analyticsWrite clean, well-documented, testable code following software engineering best practicesSupport equipment commissioning, troubleshooting, and debugging of software-related issues on the production floorParticipate in design reviews and contribute to technical architecture decisions for new automation projectsMaintain and improve existing software systems and tools used by the automation teamSupport global manufacturing operations with software solutions for equipment deployed at multiple sitesTravel to production locations as needed (up to 15%)

Required Qualifications:

Bachelor's degree in Computer Science, Software Engineering, Computer Engineering, or a related field3+ years of experience in software development with a focus on backend systemsStrong proficiency in one or more of the following: Python, C#, C++, Java, or similar languagesExperience with relational databases (SQL) and data modelingExperience designing and building RESTful APIs and backend servicesUnderstanding of software development lifecycle, version control (Git), and testing practicesAbility to work in a cross-functional engineering environment alongside hardware and controls teamsStrong problem-solving skills and ability to debug complex systemsExcellent communication skills for collaboration across global teamsAbility to travel up to 15%

Preferred Qualifications:

Experience developing software for industrial automation, manufacturing, or equipment control applicationsFamiliarity with PLC programming, OPC-UA, MQTT, or other industrial communication protocolsExperience with manufacturing execution systems (MES) or SCADA systemsExposure to machine vision, robotics, or motion control softwareExperience with time-series databases (InfluxDB, TimescaleDB) or NoSQL databasesExperience with cloud platforms (AWS, Azure) or containerized deployments (Docker, Kubernetes)Familiarity with data visualization tools such as Power BI or GrafanaExperience with message queues or event-driven architectures (RabbitMQ, Kafka)Experience in an Agile development environmentBackground in fiber optics, electronics, or precision manufacturing

Key Skills:

Backend Software Engineer, Python, C#, C++, Java, SQL, REST API, Database Development, Data Pipelines, Industrial Automation Software, Manufacturing Software, MES Integration, Data Acquisition, Equipment Control, OPC-UA, MQTT, Fiber Optics, Manufacturing Engineering, Burnsville MN

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Designation: Senior WiFi Engineer (Wireless Infrastructure)

Job Description:

We are seeking a Senior WiFi Engineer to lead the design and optimization of large-scale wireless infrastructure. The ideal candidate will have deep technical expertise and experience managing complex wireless environments.

Key Responsibilities:

Lead design and architecture of enterprise wireless networksConduct advanced RF analysis, capacity planning, and optimizationManage large-scale deployments and upgrades of WiFi infrastructureTroubleshoot complex wireless performance issuesDefine best practices and standards for wireless networksWork closely with vendors and stakeholders

Required Skills & Qualifications:

5+ years of experience in wireless networkingStrong expertise in RF design and wireless architectureExperience with enterprise-grade solutions (Cisco, Aruba, Meraki)Deep understanding of 802.11 protocols and security standardsProven experience in troubleshooting complex network issues

Preferred:

CWNA, CWNP, or CCNP Wireless certificationExperience with cloud-managed WiFi solutions

Knowledge of network automation and scripting

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