One of my banking client is looking for 3 experienced Java Developers to join a strategic engineering programme.These... Read more
One of my banking client is looking for 3 experienced Java Developers to join a strategic engineering programme.These contract roles are based in Sheffield and require 2 days per week onsite attendance.
Sheffield (2 Days Per Week Onsite Required)
Contract
⚠️ Please note: All roles require candidates to attend the Sheffield office 2 days per week.
📩 If you're interested, please send me your latest CV for further details.
GCS is acting as an Employment Business in relation to this vacancy.
Read lessSheffield, England, United KingdomContract
Experience in Kotlin (or significant Java experience with a willingness to learn Kotlin)Experienced in API development, SQL/databases, HTML/JavascriptExcellent... Read more
Experience working with standard developer collaboration Tools: Github/Bitbucket, Jira, Confluence, etc
The Developer Experience (DevX) Standards and Controls function is building a platform for control owners and development teams to manage/view their compliance with a range of software development controls.
The candidate would be working on Kotlin and Java-based web applications and APIs. There are 2-3 applications and PoCs we are hiring for. Exact candidate allocation will depend on their experience and fit. All have a microservice architecture built using modern coding techniques.
There are two roles, one is Java kotlin and the second is Java Neo4j.
GCS is acting as an Employment Business in relation to this vacancy.
Read lessSheffield, England, United KingdomContract
Job titleJava Developer with Neo4jJob TypeContract (6 Months)Client / IndustryBank Required: Languages: Java 11+, HTML5, JavaScriptFront-End Frameworks: AngularAPIs:... Read more
Job title
Java Developer with Neo4j
Job Type
Contract (6 Months)
Client / Industry
Bank
Required: Languages: Java 11+, HTML5, JavaScript
Front-End Frameworks: Angular
APIs: RESTful API Design
Databases: Neo4j, PostgreSQL
Testing: Junit, Mockito, Cucumber
Building: Maven
Tooling: GitHub, JIRA, Confluence, GitHub Copilot
The Developer Experience (DevX) Standards and Controls function is building a platform for control owners and development teams to manage/view their compliance with a range of software development controls.
The candidate would be working on re-platforming an application from a vendor platform (PCF) over to an internal bring your own code (BYOC) platform as well as modernising the application and resolving dependency issues.
YOUR RESPONSIBILITIES
Collaborate with developers, testers and the wider organisation to build and run products
Design, develop & implement back-end features as per backlog/priority with a small element of front-end development.
Collaborate with the rest of the engineering team to design and launch new features.
Proactively work with customers to resolve their issues and respond to feature requests.
Build APIs and microservices
Work in an agile CI/CD environment to deliver rapid iterations at a sustained velocity
Be an active member of a team, participating in peer reviews and in testing others code through automated test scripting
SKILLS & EXPERIENCE WE REQUIRE
Strong Java development experience (modern Java 11+).
Experience designing and building microservices architectural style applications.
Experience with Graph databases (experience with Neo4j is desirable).
Experience modernising legacy Java applications.
Experience with the design and build of REST APIs
Experience building HTML/JavaScript front-ends (experience with Angular is desirable).
Strong technical and analytical troubleshooting skills.
Experience in BDD and/or TDD approaches and frameworks (unit/integration test automation)
Experience resolving issues with dependencies (e.g. conflicts), performing upgrades and remediating dependencies with vulnerabilities.
Experience in working with Agile including the use of Jira/Confluence.
Be a proactive person who will not wait to be told what to do next or be unblocked by others
Good interpersonal skills.
Strong English skills, written and spoken.
GCS is acting as an Employment Business in relation to this vacancy.
Read lessSheffield, England, United KingdomContract
Required: Languages: Java 11+, HTML5, JavaScriptFront-End Frameworks: AngularAPIs: RESTful API DesignDatabases: Neo4j, PostgreSQLTesting: Junit, Mockito, CucumberBuilding: MavenTooling: GitHub,... Read more
Required: Languages: Java 11+, HTML5, JavaScript
Front-End Frameworks: Angular
APIs: RESTful API Design
Databases: Neo4j, PostgreSQL
Testing: Junit, Mockito, Cucumber
Building: Maven
Tooling: GitHub, JIRA, Confluence, GitHub Copilot
The Developer Experience (DevX) Standards and Controls function is building a platform for control owners and development teams to manage/view their compliance with a range of software development controls.
The candidate would be working on re-platforming an application from a vendor platform (PCF) over to an internal bring your own code (BYOC) platform as well as modernising the application and resolving dependency issues.
YOUR RESPONSIBILITIES
Collaborate with developers, testers and the wider organisation to build and run products
Design, develop & implement back-end features as per backlog/priority with a small element of front-end development.
Collaborate with the rest of the engineering team to design and launch new features.
Proactively work with customers to resolve their issues and respond to feature requests.
Build APIs and microservices
Work in an agile CI/CD environment to deliver rapid iterations at a sustained velocity
Be an active member of a team, participating in peer reviews and in testing others code through automated test scripting
SKILLS & EXPERIENCE WE REQUIRE
Strong Java development experience (modern Java 11+).
Experience designing and building microservices architectural style applications.
Experience with Graph databases (experience with Neo4j is desirable).
Experience modernising legacy Java applications.
Experience with the design and build of REST APIs
Experience building HTML/JavaScript front-ends (experience with Angular is desirable).
Strong technical and analytical troubleshooting skills.
Experience in BDD and/or TDD approaches and frameworks (unit/integration test automation)
Experience resolving issues with dependencies (e.g. conflicts), performing upgrades and remediating dependencies with vulnerabilities.
Experience in working with Agile including the use of Jira/Confluence.
Be a proactive person who will not wait to be told what to do next or be unblocked by others
Good interpersonal skills.
Strong English skills, written and spoken.
GCS is acting as an Employment Business in relation to this vacancy.
Read lessSheffield, England, United KingdomContract
Kotlin Developer (Contract)📍 Sheffield, UK (Hybrid - 2 Days Onsite per Week) 📄 Contract | Full-TimeAbout the RoleWe... Read more
📍 Sheffield, UK (Hybrid - 2 Days Onsite per Week)
📄 Contract | Full-Time
We are looking for a talented Kotlin Developer to join a dynamic Developer Experience (DevX) Standards & Controls team. You'll play a key role in building and enhancing platforms that enable engineering teams and control owners to manage and monitor compliance with software development standards and controls.
This is an excellent opportunity to work on modern, enterprise-scale applications built using Kotlin, Java, APIs, and Microservices, while contributing to innovative proof-of-concept solutions and business-critical platforms.
What You'll Be DoingDesign, develop, and maintain Kotlin and Java-based applications and APIs.Build and enhance microservices within a modern cloud-ready architecture.Collaborate closely with developers, testers, product owners, and stakeholders.Deliver high-quality backend functionality, with occasional front-end contributions.Work directly with users and customers to resolve issues and implement feature requests.Participate in Agile ceremonies and contribute to sprint planning and delivery.Perform code reviews and support automated testing initiatives.Contribute to a CI/CD culture focused on rapid, high-quality software delivery.Skills & Experience RequiredStrong experience with Kotlin, or significant Java development experience with a desire to learn Kotlin.Experience in at least two of the following:API DevelopmentSQL & Database TechnologiesHTML / JavaScriptStrong background designing and developing microservices.Excellent problem-solving and troubleshooting skills.Experience working within Agile environments.Familiarity with Jira, Confluence, GitHub, or Bitbucket.Strong communication skills, both written and verbal.Self-motivated, proactive approach with the ability to take ownership of tasks.High attention to detail and commitment to code quality.Nice to HaveExperience working with cloud platforms such as:AWSMicrosoft AzureGoogle Cloud Platform (GCP)Project OverviewYou'll be joining a team responsible for delivering multiple Kotlin and Java-based applications and proof-of-concepts that support software development governance and compliance. The solutions leverage modern engineering practices, scalable microservice architectures, and collaborative delivery methodologies.
Why Join?Work on cutting-edge technologies and enterprise-scale applications.Gain exposure to modern software engineering and DevOps practices.Access internal training, workshops, and technical learning opportunities.Collaborate with highly skilled engineering teams and industry experts.Opportunity to make a tangible impact on products used across a large organisation.
GCS is acting as an Employment Business in relation to this vacancy.
Read lessSheffield, England, United KingdomContract
Full Stack Java DeveloperContract | HybridWe're seeking a senior Full Stack Java Developer to join a high-performing engineering... Read more
Contract | Hybrid
We're seeking a senior Full Stack Java Developer to join a high-performing engineering team delivering modern, cloud-native applications within an enterprise environment.
You'll play a key role in designing, building and deploying scalable systems across the full software development lifecycle, working within agile teams focused on quality, automation and continuous delivery.
Essential Skills & Experience5+ years' commercial Full Stack Engineering experience5 years strong React or React Native development expertiseProven Java and Spring Boot development experienceRESTful API design and developmentMicroservices architecture and distributed systemsSQL and database technologiesTest Driven Development (TDD) and Behaviour Driven Development (BDD)Unit, integration and automated testing practicesGitLab and CI/CD pipeline implementationOpenAPI Specification (OAS) and YAMLAWS cloud engineering experienceSecure coding and application security best practicesDevOps and Continuous Delivery methodologiesThis is an excellent opportunity to work on large-scale digital transformation programmes using modern engineering practices and cloud technologies.
Apply now for immediate consideration, interviews to take place next week
GCS is acting as an Employment Business in relation to this vacancy.
Read lessLondon, England, United KingdomContractRemote
Senior Software Engineer (Java/AWS)Permnent Role (No sponsroship is provided) | Dublin (Hybrid)Location: Dublin, Ireland Work Arrangement: Hybrid (minimum... Read more
Permnent Role (No sponsroship is provided) | Dublin (Hybrid)
Location: Dublin, Ireland
Work Arrangement: Hybrid (minimum 3 days per week in the office)
Our client is a global technology company building large-scale cloud software solutions for enterprise customers. Their products support complex business processes through highly available, scalable, and performance-driven platforms used across multiple industries worldwide.
The engineering organisation is focused on delivering reliable SaaS products, modern cloud infrastructure, and exceptional user experiences while operating within complex and demanding technical environments.
Role OverviewAs a Senior Software Engineer, you will design, develop, and enhance cloud-based backend services within a modern SaaS platform. This role is ideal for an engineer who enjoys solving complex technical challenges, understands end-to-end system behaviour, and collaborates closely with architects, frontend engineers, DevOps teams, mobile developers, and QA professionals.
We are looking for strong software engineers rather than specialists in a single technology area. You should be comfortable understanding system interactions, integration points, and data flows while making technical decisions that balance performance, scalability, maintainability, and business requirements.
You will also be encouraged to leverage modern AI-assisted tools to improve engineering productivity, code quality, and delivery efficiency.
Key ResponsibilitiesSoftware Development & EngineeringDesign, develop, and maintain backend services primarily using Java and Spring Boot.Build RESTful APIs, integrations, data-processing services, and core business functionality.Write clean, maintainable, well-tested, and scalable code.Collaborate with Product, Architecture, DevOps, QA, Frontend Engineering, and other technical teams.Participate in technical design discussions and contribute to architectural decisions.Analyse and optimise application performance, scalability, reliability, and maintainability.Support adoption of AI-assisted software development practices.Participate in code reviews and promote engineering best practices.Develop and maintain automated testing solutions.Improve system observability through monitoring, metrics, and logging.Assist in troubleshooting and resolving complex production issues.Contribute to CI/CD and deployment improvement initiatives.Required Experience6+ years of software engineering experience in backend or full-stack development, ideally within SaaS or cloud-based environments.Strong Java development experience.Experience with Spring Boot, Spring MVC, and Hibernate.Understanding of distributed systems, APIs, integrations, and modern application architecture.Experience working with cloud platforms, preferably AWS.Experience with containerisation and orchestration technologies such as Docker and Kubernetes.Strong knowledge of Git, Maven or Gradle, CI/CD pipelines, and modern software engineering practices.Exposure to monitoring, observability, and performance optimisation.Strong communication and collaboration skills.Degree in Computer Science, Software Engineering, or equivalent practical experience.Desirable ExperienceExperience working within complex enterprise software environments.Exposure to highly scalable, customer-facing SaaS products.Experience developing solutions that operate in regulated, high-availability, or large-scale environments.What's on OfferOpportunity to work on a large-scale cloud platform serving global customers.Exposure to modern cloud-native technologies and engineering practices.Competitive salary and benefits package.Collaborative and supportive engineering culture.Hybrid working environment.Opportunity to influence technical direction and platform evolution.
GCS is acting as an Employment Agency in relation to this vacancy.
Read lessDublin, Dublin County, Republic of IrelandPermanent
Senior Java Data Engineer (AWS | Databricks | Spring Boot) - ContractLocation: Philadelphia, PA (Hybrid) Duration: ContractBuild the... Read more
GCS is acting as an Employment Business in relation to this vacancy.
Read lessWashington, District of Columbia, United States of AmericaContract
Java Data Engineer IV (Contractor)Location: Philadelphia, PA (1701 John F. Kennedy Blvd) Type: ContractAbout the RoleOur team is... Read more
Location: Philadelphia, PA (1701 John F. Kennedy Blvd)
Type: Contract
Our team is seeking a Java Data Engineer IV to support a high-impact data engineering initiative focused on modernizing and scaling enterprise analytics. This role will be instrumental in building and enhancing the data pipelines that power inventory, supply, and yield reporting, enabling business-critical analytics delivered through Tableau Cloud.
You'll work alongside experienced data engineers to develop robust ETL solutions, migrate legacy data workloads, and build cloud-native data pipelines using AWS, Databricks, and Snowflake. This is an excellent opportunity for an engineer who enjoys solving complex data challenges in a collaborative Agile environment.
What You'll DoDesign, develop, and maintain scalable ETL and data engineering pipelines.Build data pipelines that ingest, transform, and load enterprise data into Databricks.Develop and enhance Java-based applications and microservices supporting data processing.Partner with engineering teams to translate business requirements into reliable technical solutions.Build, test, and optimize pipelines using AWS, Databricks, and Snowflake.Create technical documentation, design specifications, and support quality assurance efforts.Develop infrastructure using Terraform for repeatable cloud deployments.Build and maintain CI/CD pipelines using GitHub Actions or Concourse.Troubleshoot production issues and provide post-deployment support.Improve reliability, reduce single points of failure (SPOF), and implement risk mitigation strategies.Enhance and modernize legacy data engineering jobs while supporting cloud migration initiatives.Collaborate with cross-functional teams to establish engineering best practices and improve platform performance.Required Qualifications7+ years of software engineering or data engineering experience.Strong Java development experience.Hands-on experience with Spring Boot and Microservices architecture.Experience building ETL or data integration pipelines.Experience with AWS cloud services.Strong SQL skills.Experience with Databricks and/or Snowflake.Experience with Infrastructure as Code using Terraform.Experience building CI/CD pipelines using GitHub Actions, Concourse, Jenkins, or similar tools.Strong understanding of software testing, quality assurance, and production support.Excellent problem-solving and troubleshooting skills.Experience working in Agile development environments.Preferred QualificationsExperience supporting enterprise analytics or reporting platforms.Experience migrating legacy ETL workloads to modern cloud platforms.Familiarity with Tableau Cloud or other BI platforms.Experience optimizing large-scale data pipelines for performance and reliability.Knowledge of data governance and cloud data architecture best practices.What Success Looks LikeDeliver scalable, reliable cloud-based data pipelines.Successfully support migration of legacy data engineering workloads.Improve deployment automation and infrastructure reliability.Minimize production issues through proactive monitoring and risk mitigation.Enable high-quality analytics by delivering trusted, well-documented data assets.Technical EnvironmentLanguages: Java, SQLFrameworks: Spring Boot, MicroservicesCloud: AWSData Platforms: Databricks, SnowflakeInfrastructure: TerraformCI/CD: GitHub Actions, Concourse (or similar)Reporting: Tableau CloudMethodology: Agile
If you're passionate about building modern cloud data platforms, enjoy solving complex engineering challenges, and thrive in a collaborative environment, we'd love to hear from you.
GCS is acting as an Employment Business in relation to this vacancy.
Read lessPhiladelphia, Pennsylvania, United States of AmericaContract
Job Role - Java Backend EngineerLocation: Remote (Candidates must be based in Poland)Office Hub: Kraków, PolandContract: 12 Months... Read more
We are seeking an experienced Senior Java Backend Engineer to join a high-performing engineering team on a 12-month B2B/Freelance contract, with a strong possibility of extension.
This is an exciting opportunity to work on a leading technology platform, collaborating with top-tier engineers in a fast-paced, international environment. You'll play a key role in shaping scalable backend solutions, driving technical excellence, and supporting teams across multiple stakeholders.
Key ResponsibilitiesCollaborate with highly skilled engineering teams to build and scale a best-in-class platform.Drive technical excellence and contribute to cross-team and cross-functional alignment.Design, develop, and maintain robust backend services and microservices-based architectures.Work with modern integration frameworks and implement enterprise integration patterns.Coach and mentor developers on both client and partner teams.Deliver technical training, workshops, and best-practice guidance.Collaborate effectively within diverse, multicultural teams across international locations.Stay up to date with emerging technologies and continuously improve existing solutions.Required Skills & ExperienceMinimum 5 years of experience in a Java Backend Engineering role.Bachelor's degree in Computer Science, Information Technology, or a related technical field (or equivalent practical experience).Excellent English communication, presentation, and stakeholder management skills.Strong hands-on experience with:JavaSpring / Spring BootMicroservices ArchitectureIntegration PatternsApache CamelSpring IntegrationProven ability to adapt to evolving technologies and software landscapes.Passion for building high-quality, scalable, and maintainable solutions.Experience coaching, mentoring, and supporting development teams.Interested?If you're a Java Backend Engineer passionate about Java, Spring, Microservices, and Integration Technologies, we'd love to hear from you.
Apply today or get in touch at [email protected] to learn more about this exciting freelance opportunity.
GCS is acting as an Employment Business in relation to this vacancy.
Read lessKrakow, Malopolskie, PolandFreelance
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