Sentinel

About the Company

In a world obsessed with technology, we’re interested in the people who make it.

With curiosity for our customers’ ambitions and empathy for our clients’ challenges, we connect talented technology professionals with opportunities to make the greatest impact.

We take a ‘people-first’ approach to talent solutions, building lasting relationships with our customers to help them deliver on their vision for the future.

Sentinel was established 20 years ago and in that time technologies have evolved drastically. By staying true to our commitment to put people first, we have evolved alongside them.

With offices in London, Tunbridge Wells, Czech Republic and Switzerland we deliver permanent and contract recruitment, alongside Statement of Work and Consultancy Services to support clients in total workforce management. Working with technology companies, FinTech organisations, start-ups and major brands our customers are on the cutting edge of business technologies and we supply the in-demand talent driving innovation and shaping their businesses.

Recruiter Investing in Talent Awards 2018 Winner
Kelly OCG Supplier Awards 2015, 2016 & 2018 Winner.

We supply talent to all areas of IT technology and love challenges in Data, Digital, Development, DevOps, Infrastructure, Information Security and Project Management.

Listed Jobs

Company Name

Sentinel

Job Title

Senior Java Software Engineer

Job Description

**Job Title:** Senior Java Software Engineer **Role Summary:** Senior Java Software Engineer required for a 3‑month contract with potential extension. Deliver end‑to‑end development, deployment, and support of Java microservices using Spring, Kafka, Kubernetes, and relational/noSQL databases. Operate across the full software lifecycle with strong troubleshooting and performance optimization responsibilities. **Expactations:** - Contribute immediately on a hybrid schedule; adhere to IR35 compliance. - Produce high‑quality, maintainable code under tight deadlines. - Solve complex production issues, including Kafka lag and Spring bean configuration problems. - Collaborate with DevOps and QA teams to ensure smooth CI/CD pipelines and reliable deployments. - Communicate progress, risks, and solutions clearly to stakeholders. **Key Responsibilities:** - Design, implement, and test Spring‑based services and APIs. - Integrate, configure, and tune Kafka streams, topics, and consumer groups. - Deploy and manage applications on Kubernetes clusters (Helm, operators). - Write efficient SQL/NoSQL queries and manage database schema changes. - Monitor application performance, diagnose bottlenecks, and apply optimizations. - Participate in code reviews, unit and integration testing, and automated pipeline setup. - Troubleshoot and resolve incidents in production, providing root‑cause analysis. - Document design decisions, API contracts, and operational procedures. **Required Skills:** - Java 8/11/17+ with deep knowledge of Spring (DI, scopes, transactions). - Kafka ecosystem: producers, consumers, partitions, scaling, and monitoring. - Kubernetes fundamentals: pods, services, deployments, Helm charts. - Relational databases (e.g., PostgreSQL, MySQL) and NoSQL databases (e.g., MongoDB, Cassandra). - SQL, data modeling, and query optimization. - Docker, CI/CD tools (Jenkins, GitLab CI, ArgoCD), and Git workflow. - RESTful API design and microservices architecture. - Multithreading, concurrency, and performance tuning. - Strong debugging, log analysis, and root‑cause identification. - Excellent written and verbal communication. **Required Education & Certifications:** - Bachelor’s degree in Computer Science, Software Engineering, or equivalent professional experience. - Optional certifications: Spring Professional Certification, Confluent Kafka Certified Developer, Certified Kubernetes Application Developer (CKAD).

Farnborough, United kingdom

Hybrid

Senior

04-11-2025

Company Name

Sentinel

Job Title

Cloud DevOps Engineer: Data, Python, Java, Scala, AWS / Azure, Spark, S3

Job Description

**Job Title** Cloud DevOps Engineer – Data, Python, Java, Scala, AWS/Azure, Spark, S3 **Role Summary** Engineer end‑to‑end data platform operations, deploying and automating services across AWS and Azure. Lead CI/CD pipelines, infrastructure provisioning, and container orchestration for big‑data workloads. Collaborate with data science and software teams to deliver scalable, reliable solutions. **Expectations** - Mastery of Python, Java, Scala. - Deep knowledge of AWS/Azure services, Spark, S3, NiFi. - Hands‑on experience with IaC (Terraform, CloudFormation). - Proficient in Docker/Kubernetes and Git/Jenkins/Ansible. - Strong data‑management and architecture background. - Agile, fast‑paced environments; English fluency mandatory. **Key Responsibilities** - Design, build, and maintain reusable IaC modules for cloud infrastructure. - Configure and manage CI/CD pipelines for data applications. - Deploy and scale Spark jobs, NiFi flows, and other big‑data pipelines. - Implement containerization (Docker) and orchestration (K8s, Swarm). - Monitor, troubleshoot, and optimize cloud resources (compute, storage, networking). - Ensure security, compliance, and cost efficiency across platforms. - Collaborate with data architects, developers, and stakeholders to align infrastructure with business goals. **Required Skills** - Programming: Python, Java, Scala. - Cloud Platforms: AWS (EC2, S3, RDS, Redshift, EMR), Azure (VMs, Blob, Data Factory). - Big‑Data Frameworks: Apache Spark, NiFi, Hadoop ecosystem. - IaC Tools: Terraform, AWS CloudFormation, Azure Resource Manager. - Containerization & Orchestration: Docker, Kubernetes, Docker Swarm. - Automation & CI/CD: Git, Jenkins, Ansible, CircleCI, GitHub Actions. - Data Management: ETL/ELT, data warehousing concepts, schema design. - Monitoring & Observability: CloudWatch, Prometheus, Grafana. - Agile Methodologies: SCRUM, Kanban. - Strong analytical, problem‑solving, and communication skills (English). **Required Education & Certifications** - Bachelor’s or Master’s degree in Computer Science, Information Systems, or related field. - Industry certifications preferred: AWS Certified DevOps Engineer, Azure DevOps Engineer, Certified Kubernetes Administrator (CKA), etc.

Paris, France

Hybrid

10-11-2025

Company Name

Sentinel

Job Title

Tech Bar/1st Line Support/Hammersmith

Job Description

**Job Title:** Tech Bar / 1st Line Support **Role Summary:** Provide on‑site and remote first‑line IT support for a Hammersmith client, handling Dell laptops and Apple devices. Manage incident resolution, service requests, and hardware upgrades, ensuring efficient support for employees, including VIPs. **Expectations:** - Deliver timely, high‑quality support across multiple shift patterns. - Maintain knowledge of Dell and Apple hardware and support processes. - Demonstrate strong problem‑solving and communication skills with technical and non‑technical staff. **Key Responsibilities:** 1. Respond to and resolve service requests and incidents for Dell laptops, Apple devices, printers, and meeting‑room telephony. 2. Conduct daily checks and provide support for meeting rooms and telephony systems. 3. Diagnose and address hardware faults; liaise with Dell pro‑support for laptop repairs. 4. Plan, schedule, and execute laptop hardware upgrades within agreed timelines. 5. Prepare and deploy new‑starter laptops, ensuring configurations meet security and operational standards. 6. Perform kill‑disk processes on out‑of‐warranty laptops and document them for recycling. 7. Offer deskside support and troubleshoot printing issues. 8. Support small projects related to IT infrastructure and process improvement. **Required Skills:** - Hands‑on experience with Dell laptops and Apple devices. - Proficiency in remote and face‑to‑face technical support. - Strong understanding of hardware fault resolution and ticketing systems. - Ability to upgrade and configure laptop hardware within constraints. - Knowledge of kill‑disk procedures and device lifecycle management. - Excellent communication and service‑orientated mindset. - Capable of working independently within IR35 structured engagement. **Required Education & Certifications:** - Minimum of CompTIA A+ (or equivalent) certification. - Relevant experience in a technical support or service desk role.

London, United kingdom

On site

06-01-2026

Company Name

Sentinel

Job Title

Analyst - Evaulations/Pricing Modelling

Job Description

Job title: Analyst – Valuations/Pricing Modelling Role Summary: Support the development, maintenance, and enhancement of valuation models and databases—primarily Excel and Python-based—while driving automation, data quality, and analytical rigour across multiple valuation review cycles. Expactations: Deliver high‑quality, scalable valuation tools; streamline data collection and cleansing; resolve model/data issues promptly; provide clear analytical outputs and visualisations to support business decisions. Key Responsibilities: - Maintain and enhance valuation and trend databases. - Develop and improve valuation models in Excel and Python. - Automate data collection, cleansing, and standardisation processes. - Investigate and resolve model or data issues raised internally and externally. - Support regular valuation review cycles and analytical outputs. - Create tools for data manipulation and visualisation. Required Skills: - Advanced Microsoft Excel (formulas, charts, VBA). - Python programming (pandas, numpy, matplotlib, etc.). - SQL/database familiarity. - Experience in data quality assurance and automation. - Strong analytical, problem‑solving, and detail‑orientation abilities. - Excellent written and verbal communication. Required Education & Certifications: - Minimum 2:1 degree in a numerical or analytical discipline (finance, engineering, mathematics, data analysis, operational research). - At least 1 year of commercial coding experience. (Optional: certifications in data analytics, programming, or financial modelling.)

Surrey, United kingdom

On site

Fresher

07-01-2026