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Top freelance Spring Boot developers available to hire
Senior Full‑Stack Developer with over seven years’ experience designing, building and maintaining large‑scale web applications.
Track record of delivering end‑to‑end solutions by partnering with stakeholders to translate business and user needs into reliable software.
Committed to clean, maintainable code, performance tuning, security best practices, and automated CI/CD pipelines.
Nearly two years of hands‑on AI experience, integrating machine learning models and automation to boost product intelligence.
I’ve contributed as a developer at global leaders Adobe and Newgen, as well as at high‑growth startups MoveInSync and Zillious Solutions.
Skills
Advanced:
Java, MySQL, PostgreSQL, Spring, Hibernate, Spring Boot, Maven/Gradle, Microservices, Multithreading & Concurrency Control, Web Services (SOAP & REST), RPC, Git, Google Cloud Platform (GCP), Database Modeling & Schema Design, SQL (Stored Procedures/Functions, Triggers), Docker, Kubernetes.
Intermediate:
TypeScript, Python, Angular, React, API Gateway, Service Discovery, Load Balancer, ELK Stack, Kafka, RabbitMQ, Redis Cache, RAG (Retrieval-Augmented Generation), AI Agents, LangGraph, Vector Databases, AI Workflows, Fine‑Tuning.
Core Strengths:
Scalable system design, back‑end architecture, data structures & algorithms.
How I Can Help You
– I’m here to tackle your toughest technical challenges with expertise and dedication.
Special Offer
– Enjoy your first session free! (Terms & Conditions apply — let’s discuss your needs during our requirement-gathering call.)
Satisfaction Guaranteed
– Not satisfied? Request an instant refund, no questions asked.
For a comprehensive overview of additional technologies and frameworks tailored to your needs, please refer to the Expertise section of my profile.
Experienced Software Engineer specializing in distributed systems and scalable architectures. Skilled in React, Next.js, TypeScript, Golang, and backend scheduling systems. Passionate about backend performance optimization and open-source contributions, with contributions to dicedb and open-feature/flagd.
I have a great passion for solving problems and can help people with various programming languages, databases, information systems, software related projects.
I enjoy sharing my knowledge and helping others grow in their careers. I find it rewarding to evaluate candidates, provide constructive feedback, and contribute to building strong, skilled teams.
I am a senior full-stack & DevOps developer with a track record of maintaining distributed infrastructure, recent deep experience in large-scale data pipelines and a growing skillset and interest in applied AI/LLM integration.
My recent work at an e-commerce search engine startup had me building and maintaining scrapers and a data pipeline that ingested over 10M product SKUs into an OpenSearch index, which was used for hybrid vector+lexical product search, enriched with LLM signals extracted as part of the pipeline. I've used reranking techniques like RRF to enhance relevance after retrieval, and RAG/grounding for features that answered personalized user queries with recommendations grounded in real customer reviews.
My earlier work was heavily full-stack and always involved infrastructure where I often built and supported systems end-to-end, very often in context of a regulated market - with great examples like Deckard (PropTech/GovTech), Sick Children's Hospital/RareConnect (Healthcare-adjacent), and Ethoca \[now MasterCard\] (FinTech).
I've also led IaC initiatives at Ethoca (Chef/Ansible, in 2016-17), and even implemented IaC from scratch for two startups - Pastel Labs (Terraform automation of AWS infrastructure for a B2B SaaS and a tutoring marketplace, in 2021), and Rilara (Pulumi for AWS infrastructure of their e-commerce product, in 2025-26).
My startup experience is proven track record of working independently, but I also thrive as part of a team, with most recent example of being part of Deckard's distributed remote engineering team of 25+ people spread across the US and Australian timezones.
Claude Code is part of my everyday workflow, and I am happy to consider myself a relatively-older senior developer who has successfully adapted to an AI-assisted/AI-first SDLC without compromising the quality of my work.
I would be very excited to continue my journey with an opportunity in healthcare or finance, where I could apply my IaC skills while continuing to explore the world of LLM applications to improve user experience in these regulated environments.
Should you have any questions about any of the background I mentioned here or on the attached resume, I would be glad to answer them in an interview at a time of your convenience.
Thank you!
Lead Software Engineer with 13+ years of experience building scalable enterprise applications across fintech and banking. Skilled in full-stack development, cloud migration, and blockchain integration. Led teams of 20+ developers and delivered high-performance, secure systems.
Proficient in Go, Kotlin, TypeScript, Node.js, Java, and frontend frameworks like React.js, JavaScript and Angular.
Seasoned Web Developer and Blockchain enthusiast with a proven track record in the IT and services industry. Expertise in Research, PHP, HTML, JavaScript, and Blockchain development, including Smart Contracts. Skilled in automation, application testing, and cybersecurity analysis for web and mobile apps.
I have 20 years of total experience in the field of software development. I have been running my own software consulting business. I have end-to-end experience of software development from requirement gathering to architecting to delivering the product.
My coding experience has been predominantly on backend technologies. I am an experienced software architect and cloud technologist.
Would like to contribute at a senior product/tech level in a company, where I can bring in my skills and experince in software enginering.
I am a Senior System Development Specialist at the Ministry of Communications and Information Technologies (MCIT), where I design, develop, and maintain our mobile device registration and regulation system. This system enables us to monitor and control the import, export, and use of mobile devices in Afghanistan, enhancing security and revenue collection. I spearhead the design and development efforts for key features and functionalities, using react, TypeScript [ASP.NET](http://asp.net/) Core, SQL Server, and Azure. I also collaborate closely with cross-functional teams to ensure alignment and integration with existing systems, and to gather and translate stakeholder requirements into technical specifications.
I have a Master of Science degree in Information System from Kabul University, and 7 years of experience in software engineering across various domains and technologies. I am passionate about tackling new problems and learning new skills, and I have contributed to the execution of the full software development life cycle for multiple projects, such as a mobile application for taxpayers using Xamarin and .Net Core Web API, and a revenue management information system for the Ministry of Finance. I have also written documentation, user manuals, queries, and stored procedures, and solved problems of existing projects. In addition, I was a faculty lecturer at Jahan University, where I taught data structure, algorithms, and web development, and collaborate with other academics and lecturers to improve teaching methods and expand my knowledge base. I value generating and building relationships, having strong communication skills, taking responsibility with conscience, being a flexible and motivated team member, and reading about leadership and startup.
Hi! I'm Julian — a Senior Software Architect and Engineering Manager with 14+ years building production systems across fintech, capital markets, and crypto. I mentor across Java, Python, C/C++, Rust, TypeScript, and system design, and I've taught both English and programming to students at all levels. Whether you're a beginner finding your footing, a student preparing for interviews, or a developer levelling up your architecture skills, I adapt to where you are and help you get to where you want to be.
You can view my full profile at julianpereira.ca
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Frequently asked questions
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