CrawlJobs Logo

Senior Java/Python developer

barclays.co.uk Logo

Barclays

Location Icon

Location:
United Kingdom , London

Category Icon
Category:
IT - Software Development

Job Type Icon

Contract Type:
Not provided

Salary Icon

Salary:

Not provided
Save Job
Save Icon
Apply Position

Job Description:

Join Barclays as a Java and Python developer and be involved in building the technology platform supporting the Barclays Quantitative Investment Strategies business (QIS). The team is working on a multi-year transformation programme to build a more capable, streamlined, and high-performance platform, as a key enabler for the ambitious expansion of the Barclays QIS business.

Job Responsibility:

  • Development and delivery of high-quality software solutions by using industry aligned programming languages, frameworks, and tools. Ensuring that code is scalable, maintainable, and optimized for performance
  • Cross-functional collaboration with product managers, designers, and other engineers to define software requirements, devise solution strategies, and ensure seamless integration and alignment with business objectives
  • Collaboration with peers, participate in code reviews, and promote a culture of code quality and knowledge sharing
  • Stay informed of industry technology trends and innovations and actively contribute to the organization’s technology communities to foster a culture of technical excellence and growth
  • Adherence to secure coding practices to mitigate vulnerabilities, protect sensitive data, and ensure secure software solutions
  • Implementation of effective unit testing practices to ensure proper code design, readability, and reliability

Requirements:

  • Java development – Core Java, Collections, Multi-Threading and Concurrency, OOPS concepts, Exception Handling, JVM Concepts, Spring Framework (Spring Boot), SQL
  • Python development - Python, service frameworks FasAPI/Flask/Gunicorn, OOPS concepts, Exception Handling, Data Analysis and data structures / pandas / numpy
  • Data Serialization
  • interaction with data - SQL Alchemy/Redis/S3
  • Best python coding practices
  • Ability to thrive in a pressured front office environment – fast-moving, complex, volatile, uncertain

Nice to have:

  • Solid understanding of good software development practices (TDD, SDLC, Containerization, instrumentation, observability)
  • Experience in developing, maintaining & debugging multi-protocol distributed services (REST / MQ / Solace / Kafka / etc)
  • Good business knowledge of equity derivatives and risk, or derivatives more widely, and ability to acquire new knowledge quickly on the job
What we offer:
  • Competitive holiday allowance
  • Life assurance
  • Private medical care
  • Pension contribution

Additional Information:

Job Posted:
January 08, 2026

Employment Type:
Fulltime
Work Type:
Hybrid work
Icon
Barclays - All Job Offers
Job Link Share:
Copy Link Icon
Facebook Icon Twitter Icon LinkedIn Icon

Looking for more opportunities? Search for other job offers that match your skills and interests.

Briefcase Icon

Similar Jobs for Senior Java/Python developer

Senior Java Full-Stack Developer

We are looking for a Full stack core software engineer with deep understanding o...
Location
Location
India , Chennai; Pune
Salary
Salary:
Not provided
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 7+ years of industry experience with strong hands-on experience in development of mission-critical applications using Java/Python technologies
  • Experience with complex system integration projects
  • Java, Spring, Spring Boot, Spring Cloud, J2EE Design Patterns, REST services
  • Front End Technologies like JavaScript and Angular version, CSS2/CSS3, HTML
  • Strong Knowledge of SQL, JDBC, Unix commands
  • Hands-on Database experience in relational (Oracle/DB2) and No-SQL (MongoDB)
  • Hands-on experience on working/deploying application on Cloud
  • Hands-on experience in code testing tools like Junit/Mockito/Cucumber
  • Deployment Acquaintance in Apache Tomcat, Open shift or other cloud environments
  • Expertise in Test driven development (JUnit, JMeter), Continuous Integration (Jenkins), Build tool (Maven) and Version Control (Git), Development tools (Eclipse, IntelliJ)
Job Responsibility
Job Responsibility
  • Understanding user requirements and working with a development team on the design, implementation and delivery of Java/Python application
  • Providing expertise in the full software development lifecycle, from concept and design to testing
  • Working closely with teams to design and implement current and target state business process by using various tools and technologies
  • Fulltime
Read More
Arrow Right
New

Senior cloud applications developer

Senior cloud applications developer / Développeur d'applications infonuagiques s...
Location
Location
Canada , St. Laurent
Salary
Salary:
105000.00 - 195000.00 CAD / Year
https://www.hpe.com/ Logo
Hewlett Packard Enterprise
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor's or master's degree in computer science, engineering, information systems, or closely related quantitative discipline
  • Typically, 7-10 years’ experience
  • Strong programming skills in Java/Python
  • Understanding microservice architecture and how they can be built in a containerized, Kubernetes-managed environment
  • Designing and integrating software systems running on multiple platform types into the overall architecture
  • Evaluating forms and processes for software systems testing and methodology, including writing and executing test plans, debugging, and testing scripts and tools
  • Excellent written and verbal communication skills. Ability to effectively communicate product architectures and design proposals at senior management levels
Job Responsibility
Job Responsibility
  • Leads the development of complex products and platforms, including solution design, analysis, coding, testing, and integration for building efficient, scalable and robust cloud subsystems
  • Reviews and evaluates designs, test plans, and develops code for compliance with cloud design and development guidelines and standards
  • Provides tangible feedback to improve product quality and mitigate risks
  • Represents the engineering team in various technical forums and provides guidance and mentoring to less-experienced team members
  • Drives innovation and integration of new technologies into projects and activities in the software systems design organization
  • Analyzes science, engineering, business, and other data processing problems to develop and implement solutions to complex application problems, system administration issues, or network concerns
What we offer
What we offer
  • Health & Wellbeing
  • Personal & Professional Development
  • Unconditional Inclusion
  • Fulltime
Read More
Arrow Right

Senior Distributed Systems Engineer - Ad Display Platform Engineering

The Bidding Platform organization is the core of the RTB business, processing ov...
Location
Location
Poland
Salary
Salary:
Not provided
rtbhouse.com Logo
RTB House
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 7+ years of hands-on experience in software engineering
  • Proficiency in programming
  • Excellent understanding of how complex IT systems work (from the hardware level, through software, to algorithmics)
  • Very good knowledge of fundamental Internet protocols and technologies (DNS, HTTP, cookies and others)
  • Good knowledge of basic methods of creating concurrent programs and distributed systems (from thread level to geo-distributed clusters level)
  • Practical ability to observe, monitor and analyse the operation of production systems (and draw valuable conclusions from it)
  • The ability to critically analyze the solutions created in terms of performance (from estimating the theoretical performance of the designed systems to detecting and removing actual performance problems in production)
  • General knowledge of issues (typical problems and methods of solving them) in the areas of 'high scalability' and 'high availability'
  • C1 level in English and Polish
Job Responsibility
Job Responsibility
  • Implement and maintain (in all aspects, including setting up environment, writing configuration code, monitor production) high-quality backend services for displaying Ads globally, focusing on extreme performance and scalability
  • Develop tools (deployment, testing platforms, web performance and reliability monitoring), and critical optimizations to drive measurable improvements in critical user performance metrics for ad rendering and display
  • Write, test, and deploy robust, efficient, and well-documented code in Java/Python, ensuring adherence to the highest coding and performance standards
  • Participate in code reviews, knowledge sharing sessions, and help implement technical standards and best practices within the team
What we offer
What we offer
  • Projects focused on extreme performance and high code quality – solid code reviews are our standard
  • Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers)
  • Hardware and software tailored to your preferences (e.g., MacBook, AI tool licenses)
  • Flexible working conditions – no core hours, fully remote cooperation possible
Read More
Arrow Right
New

Packaging Operations Operator

Responsible for labeling, inspecting, and packaging final container products usi...
Location
Location
United States , Sparks
Salary
Salary:
Not provided
gomillenniumsoft.com Logo
MillenniumSoft Inc
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • High School degree with 1 year of manufacturing or warehouse experience
  • Experience in a regulated environment is preferred
  • Ability to recognize deviations from specifications in manual and routine tasks
  • Proficient in maintaining neat and accurate records and logs, both manually and electronically
  • Strong communication skills for effective teamwork and reporting
  • Capability to troubleshoot, problem-solve, and use independent judgment in planning and decision-making
  • High school degree is required
  • Proficiency in English for reading, writing, analyzing charts, and performing basic arithmetic
  • Basic computer skills and experience with production equipment are essential
Job Responsibility
Job Responsibility
  • Package materials according to Standard Manufacturing Procedures (SMP) and Standard Operating Procedures (SOP)
  • Label, inspect, assemble, and fill containers under general supervision
  • Maintain accurate weighing of materials per SMP and SOP tolerances
  • Move materials from storage to workspace using material handling equipment
  • Identify the need for minor equipment repairs and troubleshoot basic issues
  • Communicate product or process status between shifts through oral or written reports
  • Fulltime
Read More
Arrow Right
New

Pricing and Promotions Specialist

Location
Location
Poland , Wrocław
Salary
Salary:
Not provided
latagliatella.es Logo
La Tagliatella
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Experience in a position related to analytics
  • Knowledge of English - B2/C1
  • University degree (preferably in economics, finance, social sciences)
  • Very good knowledge of Microsoft Office (Excel, PowerBI)
  • Excellent communication skills
  • Independence, proactivity and good organization of work
Job Responsibility
Job Responsibility
  • Providing analytics and recommendations on pricing and promotions, including product mix analysis, forecasting, KPIs monitoring to backup Marketing decisions
  • Monitoring key brands business indicators in the form of periodic reports and update them on an ongoing basis
  • Executing pipeline of analytical projects related to revenue management, customer research and market tests
  • Developing periodical and ad hoc analyses in order to evaluate the effectiveness of implemented actions on particular markets, together with conclusions and recommendations
  • Creating analytical tools and solutions to meet current and future business needs
What we offer
What we offer
  • Stable employment based on an employment contract in a global organization
  • Annual bonus - up to 10% of gross annual earnings, motivating you to achieve high results
  • Flexible working hours in a hybrid model
  • Work in a dynamic, international environment that promotes development and innovation
  • A friendly atmosphere and a culture of knowledge sharing
  • Opportunities to improve your qualifications through a variety of training courses and projects
  • A personalized benefits package: discounts at our cafes and restaurants, private medical care, a MultiSport card, and much more
  • Fulltime
Read More
Arrow Right
New

Scientific Operations Technician

Responsible for manufacturing and assembling clinical and commercial products, o...
Location
Location
United States , Sparks
Salary
Salary:
Not provided
gomillenniumsoft.com Logo
MillenniumSoft Inc
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • High school diploma with technical certification and 3 years of laboratory experience
  • Associate’s degree in a scientific discipline with 2–3 years of laboratory experience
  • Bachelor’s degree in a scientific discipline with 1–2 years of laboratory experience
  • Strong teamwork and communication skills
  • Detail-oriented with excellent time management abilities
  • Ability to operate independently and demonstrate initiative
  • Proficiency in MS Excel and basic arithmetic
  • Ability to read, write, analyze charts, and follow diagrams in English
  • Proficiency in scientific and laboratory operations
  • Commitment to safety, quality, and process efficiency
Job Responsibility
Job Responsibility
  • Manufacture and assemble clinical and commercial products
  • Weigh, measure, and check raw materials to ensure proper batch ingredients and quantities
  • Assist with in-process testing to confirm batches meet specifications
  • Remove and dispose of waste chemicals, solvents, and acids
  • Create solutions, powders, and liquids to meet batch specifications
  • Provide training for new procedures and onboarding activities
  • Fulltime
Read More
Arrow Right
New

Systems Verification Engineer II

The Systems Verification Engineer II will work on BD flow cytometry products, en...
Location
Location
United States , San Jose
Salary
Salary:
38.00 - 42.00 USD / Hour
gomillenniumsoft.com Logo
MillenniumSoft Inc
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor’s Degree in Biology, Immunology, Biomedical Engineering, or related fields
  • Minimum of 2 years experience in product development with knowledge of design control elements
  • Basic knowledge of the purpose of System Verification and Validation
  • Basic understanding on how to operate and trouble-shoot a Flow Cytometer Instrument
  • Ability to translate verbal and/or visual instructions into written instructions
  • Ability to quickly grasp the functionality and interdependencies of complex multidisciplinary systems
  • Ability to understand the broader impact of design features, testing methods, and test results
  • Apply systematic troubleshooting and debugging skills
  • Strong interpersonal skills
  • Excellent written and oral communication skills
Job Responsibility
Job Responsibility
  • Work closely with Senior Systems Verification Scientist or Engineer and the product development team to ensure product design meets product requirements
  • Apply engineering, statistics, and scientific theory to measure and quantify performance of BD cell analysis products
  • Conduct experiments to assess system performance
  • May include the planning, writing and execution of system verification and validation protocols, analysis and interpretation of results, and communication of results
  • May be called upon to lead small to medium sized projects or initiatives, including generation of project plans, development of test strategies
  • May be responsible for translating product requirements to system verification test protocols
  • Engage in technical dialog with engineers and project stakeholders
  • Exercise independent judgment and apply systems thinking, problem solving, debugging, and troubleshooting
  • Operate within BD design control, quality, and safety requirements, and promote a safe working environment
  • Fulltime
Read More
Arrow Right
New

Quality Engineer

The Quality Engineer plays a key role in evaluating and maintaining product and ...
Location
Location
United States , Mannford, OK
Salary
Salary:
Not provided
gomillenniumsoft.com Logo
MillenniumSoft Inc
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Minimum 2 years of applicable experience in a related role
  • Experience with GMP in medical devices and/or pharmaceuticals is a must
  • Supplier quality experience is a plus
  • Bachelor’s degree (BS) or equivalent required
  • Basic knowledge of theories, practices, and procedures in quality engineering
  • Ability to work under direct supervision and perform routine tasks
  • Basic knowledge of quality engineering policies, principles, and best practices
  • Basic statistical sampling and analysis skills
  • Competence in writing test protocols and validation reports
  • Strong problem-solving and analytical abilities
Job Responsibility
Job Responsibility
  • Evaluate and maintain product and service quality
  • Resolve equipment and process-related production issues
  • Conduct equipment, process, materials, and method validation
  • Perform statistical analysis and metrics to assess systems and processes
  • Develop and execute test protocols, collect data, and write validation reports
  • Collaborate cross-functionally in product/service development or maintenance
  • Fulltime
Read More
Arrow Right
Jobs by Category
Art and Entertainment Jobs Banking Jobs Call Center Jobs Construction Jobs Consulting Jobs Customer Service Jobs Education Jobs Energy Jobs Finance Jobs Gastronomy Jobs Health and Beauty Jobs Hospitality and Tourism Jobs Human Resources Jobs Insurance Jobs IT - Administration Jobs IT - Software Development Jobs Legal Jobs Logistics Jobs Manufacturing Jobs Marketing, Digital Marketing, SEO, SEM Jobs Media Jobs Nursing Jobs Office Administration Jobs Pharmacy Jobs Physical Work Jobs Public Relations Jobs Public Sector Jobs Purchasing Jobs Quality Control Jobs Real Estate Jobs Research and Development Jobs Sales Jobs
Job Positions Jobs by Country
United States Jobs United Kingdom Jobs India Jobs Canada Jobs Australia Jobs Germany Jobs Ireland Jobs Poland Jobs
Company
Blog About Us Contact
Follow Us
Facebook
X (Twitter)
LinkedIn
Instagram
© 2026 CrawlJobs Ltd. All Rights Reserved
Terms & Conditions Privacy Policy