Hire the Best Spring Framework Specialists
in the United Kingdom

I am a Senior Software Engineer with over 12 years of experience specializing in high-scale, resilient systems. My career is defined by taking full ownership of complex technical challenges, from designing high-concurrency backend services to architecting modern, modular frontends. I have a proven track record of delivering value in both high-growth startups and large-scale multinationals like Cisco, Skyscanner, and Kindred Group. Technical Focus - Backend & Systems: Expert in the Java ecosystem (Spring Boot, Reactive Spring, Hibernate, Security). I also specialize in building high-concurrency services using Go (Golang) for real-time event processing and Node.js for secure API layers. - Frontend Architecture: Core expertise in React, Redux, and Next.js using TypeScript. I focus on Micro Frontend architectures to create reusable, modular components that improve performance across large applications. - Infrastructure & DevOps: Deeply experienced in AWS (EKS, Lambda, S3, RDS). I manage container orchestration via Kubernetes and ArgoCD, and I design robust CI/CD pipelines using GitHub Actions and AWS CodePipeline. - Data & AI: Experienced with PostgreSQL, MySQL, and DynamoDB (utilizing Global Tables for cross-region replication). I have hands-on experience integrating Generative AI/LLMs into production backend workflows via gRPC and REST. Key Professional Impact - Payments Specialist: Managed end-to-end payment lifecycles using Stripe Connect, implementing secure subscriptions and 3DS authentication to mitigate fraud and ensure seamless user experiences. - At Cisco ThousandEyes: Developed high-scale backend systems utilizing Java, Spring Boot, and Kafka to handle massive data streams. - At Skyscanner: Integrated Generative AI for traveler search, managed EKS cluster migrations, and built a secure, cross-region Payment Gateway platform using Java, Dropwizard, and DynamoDB. - At Kindred Group: Designed a Micro Frontend architecture that unified style components across multiple applications, significantly improving loading performance. - Specialized Projects: Built an asynchronous IoT testing service in Go handling millions of WebSocket events and managed complex payment lifecycles using Stripe Connect. I prioritize building for long-term maintainability and performance. If you need an engineer who can bridge the gap between complex backend logic, scalable infrastructure, and a seamless frontend experience, let’s talk.

Enthusiastic, talented Senior Software Engineer with excellent programming skills, strong problem-solving abilities, quality-driven and customer-focused. Passionate not only about technology but also about applying it to improve people’s lives in new and innovative ways. Experienced in handling the entire software development life cycle, and used to working with a wide variety of technologies. A constant learner who motivates their peers. Self-motivated, positive, proactive and pragmatic, communicative and collaborative, and ready to take responsibility and ownership. EXPERTISE • Strong experience with Python, Go, Java, C, C++ and Lua; • Good Knowledge of Ruby and Js; • Solid experience with object-oriented design, and design patterns; • Experienced with UNIX operating system, including Linux for development and basic administration; • Familiarity with databases such as PostgreSQL, Oracle, MySQL and PL/SQL; • Experienced with OpenGL, 3D graphics, and ima​ging; • Great Computer Vision and OpenCV experience; • Good experience working with GUI development such as QT, Swing, and IUP; • Familiar with Web development: J2EE, Spring MVC, Tomcat, JSP, Servlets, JSF, HTML, CSS; • Good Knowledge with Multi-threaded and Client- Server programming; • Strong experience in design, unit testing, reviews, system testing, and requirements; • Experienced with all phases of product development lifecycle; • Experienced with source control systems like CVS, Subversion, JIRA, Buildbot and Hudson; • Familiar with agile methodologies as well as software planning and estimation techniques; • Strong commitment to life-long learning, enjoying teaching and mentoring; • Team oriented, encouraging the use of conventional procedures, practices, and tools; • Excellent written and verbal communication skills (English and Portuguese).

Hi. I am Bilal, A Experienced Java Developer and A Certified Spring Professional by Broadcom. I’m an expert in providing API-based solutions related to Spring Boot, Microservice-based projects along with API Gateway, Message brokers , SQL & NoSQL databases, Maven, AWS Lambda, Kubernetes. Technical Competencies: • Java Tech-stack: Spring Boot, Spring Security Hibernate, JPA, Spring Cloud, JavaFX, Android, AWS Lambda, AWS SNS, AWS SQS, AWS CodePipeline, AWS CodeCommit • Language known: Expert in Java, Core JavaScript, basic Python, Core TypeScript • Database Hands-on: MySQL, Oracle, H2, Redis, PostgreSQL, MongoDB, Elasticsearch, AWS DynamoDB, Cassandra • Storage Hands-on: Firebase Storage, AWS S3 Bucket Storage • Messaging and Notification Frameworks: Apache Kafka, RabbitMQ, AWS SNS & SQS • Continues Integration and Continues Deployment Hands-on: Git, GitHub, Bitbucket, Dockers, AWS Code Build, Heroku Profile Summary: • Hands-on experience on Spring Boot based microservices, AWS SNS & SQS • Handled structured, semi-structured and unstructured data • Experience in Python scripting for data processing , ReactJS for Frontend development • Strong Code Reviews in Spring Boot based microservices, testing with Junit, Mockito and Postman My qualities include: ● Good communication skills & happy to give you regular updates via Upwork, email, Skype etc. ● Good quality , clean and robust code. ● On time delivery ● Top Rated on other Freelancing Platform ● Client's 5 star feedback on Freelancing Platform My business objective is to help my clients to build their Web applications, APIs or Microservices as quickly as possible without neglecting critical security, performance and usability issues. I aim to form a long-term working relationship. Thank you .

With 9 years of experience as a Full-Stack Java/J2EE Web Developer, I offer extensive expertise in the analysis, design, development, and implementation of robust web-based applications. My diverse skill set includes: Java SE: In-depth knowledge of core Java concepts, including Collections, Threading, and Concurrency. Java EE Technologies: Proficient in using Servlets, JDBC, JSP, JSTL, and JNDI. Spring Framework: Extensive experience in developing multi-tier applications using Spring MVC and Spring Boot. Strong understanding of Spring Core, including Dependency Injection, Annotations, and XML-based Configurations. Skilled in Spring AOP, with hands-on experience in Advice, Aspects, and AOP Processor. Microservices: Strong knowledge of Microservice Architecture using Spring Boot and Spring Cloud. Web Technologies: Expertise in designing dynamic web applications using HTML5, CSS3, JavaScript, jQuery, AJAX, and JSON. Proficient in building responsive applications with Bootstrap. Front-End Frameworks: Strong experience with Angular, including commonly used modules, creating reusable Components, Pipes, and Services. Additionally, I possess hands-on expertise with React.js for building scalable, interactive front-end interfaces. AWS: Good knowledge of Amazon Web Services (AWS), particularly in deploying and managing applications using EC2, S3, and other core AWS services. Web Services: Skilled in developing applications with SOAP and RESTful Web Services. Build & Automation Tools: Experienced in using MAVEN Build System and proficient in continuous integration and deployment practices. Application Servers: Proficient in deploying and managing applications on Apache Tomcat 7.0/8.0/8.5, and GlassFish 4.0. Testing & Debugging: Expert in Unit Testing using JUnit, Jasmine, and Karma. Experienced in utilizing Log4j and I18N for logging and internationalization. Database Management: Expertise in database technologies such as MySQL 5.6/5.7, Oracle 10g/11g/12c, and MS-SQL 12. Strong skills in database design and query optimization. Version Control & Collaboration: Experienced with version control tools like GIT and ticket tracking platforms like JIRA. Documentation & Modeling: Proficient in project documentation, including E-R Diagrams, UML modeling, and comprehensive design documentation. Software Development Life Cycle (SDLC): Hands-on experience in all phases of SDLC with a strong focus on AGILE-SCRUM methodologies. Demonstrated leadership in delivering projects on time and within scope. I am committed to delivering high-quality, scalable, and efficient software solutions. With a strong work ethic, self-learning aptitude, and the ability to adapt to new technologies, I am prepared to take on challenging projects on platforms like Upwork.

With over 20 years of experience, I specialize in the intersection of Agentic AI, Cloud Architecture, and Scientific Computing. I also specialise in Nextflow workflow orchestration, helping bio-technology and data-science firms build scalable, reproducible pipelines on AWS Batch and EKS. By combining my 20-year background in Python/Javascript with modern LangChain/LangGraph agentic workflows, Nextflow Specialist: Expert in designing and deploying complex bioinformatics pipelines, containerizing workloads with Docker/Singularity, and optimizing execution on AWS Batch and Seqera Platform (Tower). AWS Expert: Certified Associate Architect and DevOps Admin with a focus on high-performance computing (HPC) and data warehousing (Redshift/OpenSearch). Nextflow Development: Building DSL2 pipelines for high-throughput data processing. Cloud Scaling: Integrating Nextflow with AWS Batch, S3, and IAM for secure, petabyte-scale analysis. Containerization: Managing environment reproducibility using Docker and Kubernetes (EKS). Hybrid AI-Pipelines: Integrating LLMs and RAG into scientific workflows to automate metadata extraction and report generation. Artificial Intelligence: LangChain, LangGraph (Stateful Agents), RAG, OpenAI API, Vertex AI, Prompt Engineering, Vector Databases. Core AI & Agentic Orchestration Advanced Orchestration: Expert in designing complex, stateful multi-agent workflows using LangGraph and LangChain. Agent Design Patterns: Proven track record in implementing Supervisor multi-agent architectures and Deep Agent patterns to solve multi-step reasoning tasks. State & Memory Management: Implemented robust user session management using checkpoints and persistent history, ensuring seamless long-term context retention in agentic conversations. Tooling & Interoperability: Developed custom MCP (Model Context Protocol) tools and servers to standardize how LLMs interact with external data sources and local environments. RAG & Data Engineering Retrieval Augmented Generation (RAG): Built production-ready RAG pipelines utilizing high-performance Vector Databases including Redis and FAISS. Structured Data Agents: Developed specialized SQL Agents capable of translating natural language into complex queries for automated data analysis and reporting. Model Agnostic Development: Extensive experience prompt engineering and integrating various LLMs (OpenAI, Anthropic, Llama) based on performance and cost requirements. Backend, Middleware & Performance Optimization: Implemented custom LangChain middleware to manage token limits, optimize latency, and ensure high-performance execution of LLM calls. API Development: Expert in Python and FastAPI, building the scalable backends required to serve AI agents to end-users. Cloud & DevOps: Proficient in Dockerizing AI applications and deploying them to scalable Cloud Infrastructure, ensuring high availability for both small-scale startups and large-scale enterprises. Frontend & UX Full-Stack Capability: Skilled in ReactJS to build intuitive, responsive frontends for AI-driven applications, focusing on real-time streaming and chat interfaces. Nextflow & Bioinformatics: Nextflow (DSL2), AWS Batch, Pipeline Optimization, Docker/Containerization, Large-scale Data Processing, Bio-Tech Data Solutions. AWS Infrastructure (Certified): Solutions Architect & DevOps Admin, EKS (Kubernetes), VPC, Lambda, API Gateway, DynamoDB, Redshift, CloudFormation/CDK, CodePipeline. Enterprise Development: Python, Java (Spring Boot), Microservices, RESTful APIs, SQL/NoSQL (PostgreSQL, Aurora, DynamoDB).

➡️ Software Developer specialized in RESTful API with Spring Boot, NodeJs ➡️ Several backend applications running in the US market, EU and Asia market ➡️ Expert in cloud technologies (AWS, GCP) ➡️ Expert in container technology (Docker) ➡️ Microservice and low-latency scalable system design Motivated and results-driven Java developer with 8+ years of experience crafting clean, efficient software across diverse platforms. Expertise lies in Spring Boot, cloud technologies like AWS, and building scalable systems with performance optimization in mind. Thrive in collaborative environments, tackling complex challenges, and delivering projects on time and within budget. 📖 Technical Skills: ✒ Programming Languages: Java, Spring, Spring Boot, Javascript, C, Python, Go ✒ Front-End: Vue.js, Thymeleaf, HTML5, CSS, Javascript, AJAX ✒ Back-End: Java, Spring, Spring Boot, Spring Data, Spring Security, Hibernate, Node.js, Express.js ✒ Databases: SQL/NoSQL (MySQL, MongoDB, PostgreSQL), Redis, GraphQ ✒ Cloud & DevOps: AWS, CI/CD, Linux, Git, GitHub, AWS Services ✒ Other Tools: APIs, Redis, Maximo, Birt Report, CI/CD, log4j, Junit5, JQuery, JMeter, Apache Tomcat, REST, Git, GitHub, Gitlab, OAuth2, Kafka, Maven, Tomcat, Keycloak, Bash, Swagger, TDD Ready to collaborate on your next project? Let's connect and discuss how my skills and experience can help you achieve your goals.