Queen Square Recruitment

About the Company

We are an independent recruitment consultancy driven to provide an excellent service to our clients and candidates. We take pride in our service and delivery and have built strong, transparent relationships with all our customers.

How we can help you:

If you're looking to resource an entire project or to fill one strategic position, please get in touch on 020 3887 8700 / 0117 403 8888 or email your requirements to hello@macleanmoore.com - we pride ourselves on our speed of response and are looking forward to hearing from you.

With Maclean Moore, there are no boundaries.

We offer proven delivery solutions in contract, permanent, account management and executive search recruitment. We have a transparent, tailored delivery model our clients and candidates enjoy. Whether it’s a one-off contractor utilising a niche skill set, or to engage with a large team for rapid upscaling we can deliver. Our leading systems and pragmatic approach gives us the opportunity to develop clear strategies and deliver every time.

Listed Jobs

Company Name

Queen Square Recruitment

Job Title

Mainframe Data Architect

Job Description

Job title: Mainframe Data Architect Role Summary: Lead the migration of critical business data from Db2 on z/OS to Amazon Aurora PostgreSQL, designing and implementing change‑data‑capture (CDC) pipelines, ensuring zero‑surprise cutovers, and architecting event‑driven systems. Expectations: Deliver a clean, validated migration within a 6‑month contract, meet governance controls, and support ongoing operational observability. Key Responsibilities: - Design and build CDC pipelines (IBM CDC/Precisely) with subscription, bookmark, and replay/backfill logic. - Translate Db2 schemas to Aurora PostgreSQL, handling logical/physical modelling, referential integrity, and indexing/partitioning. - Develop integration pipelines (Db2 → Aurora via Kafka/S3), enforcing reliability, ordering, and merge/UPSERT logic. - Perform data encoding transformations (EBCDIC → UTF‑8, packed decimals) and create robust validation suites. - Use migration tooling (AWS Glue, Athena, Redshift) for schema conversion and analytics. - Implement Infrastructure‑as‑Code (Terraform) and CI/CD pipelines (GitLab). - Plan and execute dual‑run cutovers, reconciliation, rollback, and governance. - Build observability dashboards (CloudWatch, Grafana) for lag, throughput, errors, and cost. - Apply Domain‑Driven Design and event‑driven architecture principles for CDC as event streams. Required Skills: - Expertise in CDC tools (IBM, Precisely) and subscription management. - Deep knowledge of Db2, z/OS cataloging, batch windows, and performance tuning. - Proficiency in relational modelling (PostgreSQL/Aurora), normalization, denormalization, and partitioning. - Experience with Kafka integration, Python/SQL troubleshooting, and UPSERT/MERGE logic. - Strong data quality mindset: validation tests, reconciliation, and schema validation. - Familiarity with Domain‑Driven Design, CQRS, and event‑driven architecture. Desirable: IBM zDIH patterns, zIIP tuning, COBOL copybook/VSAM ingestion. Required Education & Certifications: Bachelor’s or Master’s degree in Computer Science, Data Engineering, or related field. Relevant certifications in mainframe technologies, AWS, or database design are a plus.

London, United kingdom

Hybrid

02-12-2025

Company Name

Queen Square Recruitment

Job Title

Database Administrator

Job Description

Job Title: Database Administrator Role Summary: Contract Level 3 database administrator responsible for administration, performance tuning, and migration of Snowflake, Greenplum, and PostgreSQL databases in a hybrid environment. Expectations: Deliver high‑availability, secure, and optimized database solutions with minimal downtime. Maintain on‑call support for weekend coverage. Demonstrate advanced scripting and automation to automate routine tasks and monitor database health. Key Responsibilities: - Administer and maintain PostgreSQL, Greenplum, and Snowflake databases. - Design, implement, and manage Snowflake schemas, roles, and data lakes. - Build data ingestion pipelines with ETL tools (Informatica, Talend, gpload, pxf, GP spark). - Manage file formats (JSON, XML, CSV) and execute migrations using gpcopy and other utilities. - Configure high‑availability and disaster recovery with Patroni and streaming replication. - Perform backups, recoveries, and performance tuning across all platforms. - Develop and maintain automation scripts in Shell, Python, and Ansible. - Implement monitoring, security, and compliance controls. - Collaborate with cloud platforms (AWS, Azure, GCP). - Provide on‑call weekend support. Required Skills: - Extensive experience as a DBA with PostgreSQL, Snowflake, and Greenplum. - Advanced SQL query writing and performance analysis. - Proficiency in Shell, Python, and Ansible scripting. - Knowledge of Patroni for HADR and streaming replication. - Ability to design and manage data lake structures in Snowflake. - Experience with ETL processes and tools (Informatica, Talend). - Familiarity with cloud services (AWS, Azure, GCP). Required Education & Certifications: - Bachelor’s degree in Computer Science, Information Systems, or equivalent work experience. - PostgreSQL DBA, Snowflake DBA, or Greenplum certification preferred. - Cloud certification (AWS Certified Database – Specialty, Azure Data Engineer Associate, or GCP Professional Data Engineer) preferred.

Glasgow, United kingdom

Hybrid

02-12-2025

Company Name

Queen Square Recruitment

Job Title

Back End Developer

Job Description

**Job Title**: Mobile Backend Developer (Java/Kotlin) **Role Summary** Senior application engineer responsible for designing, developing, and maintaining cloud‑based backend services that power mobile applications. Provides technical leadership, mentors junior developers, and champions best practices across the SDLC to deliver secure, scalable, and high‑quality solutions. **Expectations** - Act as a senior technical leader in a mobile‑backend environment. - Own end‑to‑end lifecycle from requirements to deployment and support. - Mentor and coach junior engineers, fostering a culture of continuous improvement. - Drive innovation by evaluating and adopting emerging technologies. **Key Responsibilities** - Architect and implement distributed microservices using Java/Kotlin and Spring Boot. - Design secure REST/GraphQL APIs, incorporating OAuth 2.0 and robust authentication. - Apply event‑driven architecture patterns (e.g., message queues, Kafka) for mobile integration. - Write automated tests (TDD/BDD), maintain code quality, and conduct code reviews. - Collaborate with product, QA, and ops teams to define and meet technical requirements. - Ensure compliance with IT security standards and regulatory requirements. - Continuously refactor and optimize existing services for performance and scalability. **Required Skills** - 5+ years of backend development in Java/Kotlin with Spring Boot. - Proven experience building microservices, RESTful APIs, and secure authentication flows. - Deep knowledge of AWS services (EC2, Lambda, RDS, S3, SNS/SQS, API Gateway). - Strong understanding of automated testing, CI/CD pipelines, and DevOps practices. - Familiarity with event‑driven architectures and message brokers (Kafka, RabbitMQ). - Experience in financial‑services domain or similar regulated industry preferred. - Excellent problem‑solving, analytical thinking, and communication abilities. - Proficiency in developing and documenting scalable, maintainable code with design patterns. **Required Education & Certifications** - Bachelor’s degree in Computer Science, Software Engineering, or related field (or equivalent professional experience). - AWS Certified Solutions Architect or Developer – Associate preferred.

Manchester, United kingdom

Hybrid

12-12-2025

Company Name

Queen Square Recruitment

Job Title

Oracle Integration Cloud Developer

Job Description

**Job Title** Oracle Integration Cloud (OIC) Developer **Role Summary** Design, develop, and maintain integration solutions using Oracle Integration Cloud (OIC) to connect Oracle Fusion applications (ERP, HCM, SCM, WMS) with external systems. Implement file-based and API integrations, develop PL/SQL packages for data staging and transformation, create BI Publisher reports, and ensure smooth operation of integration flows. **Expectations** - Remote contract position, 6 months (starting 01‑Jan‑26). - Deliver high‑quality integration solutions on time, collaborating with business analysts, stakeholders, and on‑prem teams. - Mentor junior developers and share best practices. **Key Responsibilities** - Design and develop OIC integrations (REST, SOAP, SaaS adapters, FTP/SFTP). - Configure and manage OCI File Storage and other OCI services. - Create and optimize PL/SQL packages for data staging, transformation, and FBDI in Oracle ATP. - Build and schedule BI Publisher (BIP) reports and integrate them into OIC flows. - Translate business requirements into technical integration designs. - Monitor, troubleshoot, and resolve integration issues. - Maintain thorough documentation of integration processes, PL/SQL logic, and OCI components. **Required Skills** - Proven experience as an Oracle Integration Cloud Developer. - Expertise in OIC3 integrations with REST/SOAP, FTP/SFTP, and SaaS adapters. - In‑depth knowledge of Oracle Cloud Applications (ERP, HCM, SCM, WMS). - Advanced SQL and PL/SQL skills; experience with external tables and FBDI processes. - BI Publisher report creation, scheduling, and OIC integration. - Familiarity with OCI services (File Storage, Logging) and on‑prem connectivity. - Strong problem‑solving, communication, and mentoring abilities. **Required Education & Certifications** - Bachelor’s degree in Computer Science, Information Systems, or related field. - Oracle Cloud Integration Certified Professional (or equivalent Oracle integrations certification) is preferred.

United kingdom

Remote

17-12-2025