Senior Java Cloud-Native Developer & AI Engineer for Scalable Microservice Systems
IT consultant & software developer since 2016 · Freelancer since 2020 · Frankfurt am Main · DACH (DE · CH · AT)
I bring AI into systems that cannot afford to fail – and, as an experienced Java developer, build the backends underneath. Over 10 years in software development, many of them in banks and large corporations: Spring Boot, Kubernetes, AWS and Claude integration directly in the Java backend.
Reply within 24 hours · free initial consultation
Since April 2016 I have been building backend systems – many of them run in production at banks and large corporations.
I combine two worlds: Java backends that hold up under load and regulation, and AI that reaches production instead of staying a prototype. On request, I also train your team in Java.
My focus is on developing cloud-native applications based on Java SE and Java EE and the Spring Framework, applying agile methods such as Scrum and SAFe and DevOps principles.
In particular, these include:
As lead trainer for Java Standard Edition I prepared groups for the Oracle certification and made complex technology understandable – the same skill that makes architectural decisions explainable in a project.
In large-scale projects I facilitate the technical alignment across system and team boundaries – and explain decisions so that the business side and the developers are talking about the same solution.
Working freelance as Honar IT Consulting & Development.
As a senior Java backend developer with over ten years of software development experience, many of them in banks and large corporations, I offer clear advantages for critical backend projects.
Over a decade of experience developing complex Java backend systems – from architecture through to production-ready solutions; a Spring Boot freelancer since 2020, previously an employed IT consultant.
Projects at ING, Comdirect, Commerzbank and Deutsche Bahn: I know what highly regulated environments demand in terms of stability, security and compliance – from my own projects, not from training courses.
Architectures that grow instead of being rebuilt: cloud-native microservices on AWS, Azure and Kubernetes, decoupled via Apache Kafka – as an experienced microservices developer and Java cloud architect.
Certified Scrum Master (PSM I & II) who practises DevOps day to day. CI/CD, automated testing and continuous integration from day one – for fast delivery cycles and stable systems.
Author of two specialist books on Claude AI (epubli, 2026), member of Anthropic’s Claude Partner Network and holder of 12 Anthropic Academy course certificates (2026). Plus Oracle Java SE (OCA), ISTQB Certified Tester, Scrum PSM I/II and PSPO I – along with many years of training experience (Accenture, HAW Hamburg).
AI is not an add-on for me, it is how I work. Direct integration into your Java/Spring landscape via Spring AI and LangChain4j – no Python workarounds. Day to day: the Claude API and OpenAI API for LLM integrations, RAG pipelines and embeddings, plus Claude Code and GitHub Copilot as AI pair programmers in the IntelliJ IDE.
Core competencies of an experienced Java developer and Spring Boot freelancer – focused on the technologies that make enterprise systems scalable and future-proof.
Project experience since 2016 in banking, automotive, rail and aviation – plus an AI reference project in property management.
Reference project within a tender · freelance
Background: An owner-managed property management company was looking, as part of a tender, for an AI-powered property memory with case assistance – documents, emails and cases searchable, classifiable and traceable in an audit-proof manner. As my proposed solution I designed and built a complete, demonstrable MVP end to end.
Responsibilities & Approach
Results & Impact
Own initiative · freelance
Content & Results
IT Consultant / Java Software Developer
IT Consultant / Java Software Developer
IT Consultant / Java Software Developer
IT Consultant / Java Software Developer
IT Consultant / Java Software Developer
IT Consultant / Java Software Developer
Java SE Trainer
IT Consultant / Java Software Developer
IT Consultant / Java Software Developer
Subject Tutor / Lecturer
Planning something similar? Enquire about a project →
Claude Code & Development
MCP & Agents
Foundations & Teaching
Completion certificates for courses taken at the Anthropic Academy in 2026 – not an examined professional certification.
“Homan integrated into the KTO development team very quickly, actively helped shape the rituals of our Scrum team and, with his calm and objective manner, helped to settle heated discussions. He became an expert in Spring Boot, Spring REST services, OpenAPI (Swagger), Spring Cloud Contracts and Cucumber. Alongside his programming work, he represented the team on the architecture and security board and acted as the point of contact for other teams. The team will miss him greatly.”
Translated from German
“Homan integrated into the squad very quickly and took on tasks independently. He contributed actively to development topics and made many suggestions for improvement. His focus areas were Java SE/EE, RESTful APIs, Spring Framework, Apache Kafka, test automation, cloud technologies, Kubernetes, Azure, microservices and ShedLock. We would gladly bring him on board again at any time.”
Translated from German
Convinced? Tell me about your project – I’ll take a look.
Discuss Your Project →I support your project all the way: from the idea and requirements through architecture and development to production support, with maintenance by arrangement if required – and with one point of contact from start to finish.
I test your idea technically before you commit a budget: a working prototype that shows whether the approach holds up – with a clear recommendation for the next step.
The smallest product that delivers real value to real users: prioritised scope, clean architecture, tested and production-ready – a foundation to build on, not a throwaway prototype.
Custom CRM systems that fit your processes rather than the other way round: customers, contacts, cases and documents in one place – optionally with Claude analysing emails, classifying cases and drafting replies.
After go-live I stay on board: I support live operation, fix defects, keep dependencies up to date and develop the solution further – ongoing maintenance by arrangement.
You bring your domain know-how, I bring the technical delivery. Together we build a solution that creates measurable economic value – from the initial assessment through to post-go-live support.
Together we clarify the starting point, constraints and goals.
I identify the use cases with the greatest leverage and prioritise them by economic value and feasibility.
Joint architecture decisions: I contribute the technical know-how for a robust, secure and scalable solution.
Production-ready implementation and integration into your existing systems – with a supported, well-planned go-live.
Support after go-live: further development and support as needed – so the solution delivers value in the long term.
Before we start, I put a figure on what the solution will cost and what it will save.
Within 4–6 weeks, the assessment and PoC show whether the use case holds up – before you commit a larger budget.
First production results in weeks, not quarters.
Have an idea or a concrete requirement? Describe your project – I will get back to you with an assessment.
Discuss Your Project →From AI consulting and Claude integrations to automation solutions and training – all handled end to end, backed by over 10 years of software development experience.
Intelligent search and analysis across internal knowledge bases (Confluence, SharePoint, internal docs) based on Claude + RAG pipelines. Securely integrated into existing Java systems without sending sensitive data to external APIs in an uncontrolled manner.
Claude agents integrated directly into Spring Boot microservices. Document verification, compliance checks, email triage – with Kafka connectivity, retry logic, observability and a CI/CD pipeline.
Submit an automation request →Direct integration of LLMs (Claude, GPT) into Java/Spring backend systems. REST APIs with AI capabilities, streaming responses, tool use and prompt caching – production-ready, scalable and cost-optimised.
Strategic consulting: Where does AI add value in your organisation? I analyse your processes, evaluate AI potential and deliver a prioritised roadmap – free of vendor lock-in, neutral and results-oriented.
Practical training for developers and teams: prompt engineering, the Claude API, agentic AI, Spring AI integration. From half-day workshops to multi-day intensive courses – remotely or on site.
From assessment to a working proof of concept in 4–6 weeks. I identify the 2–3 processes with the highest AI leverage and build a working prototype with the Claude API.
“I don’t build AI demos. I integrate AI into systems that cannot afford to fail.”
I have written and published two professional books on Anthropic Claude – from the first prompt through production-ready agent systems to the official Claude certification, CCA-F. Both books are written in German.
From the first prompt to a production-ready agent system: the six core prompt-engineering techniques, the Claude Agent SDK, MCP integrations, plus security and compliance (EU AI Act, GDPR) – with three end-to-end projects and six DACH case studies.
View on epubli →
A precise preparation for the Claude Certified Architect – Foundations (CCA-F), the first official technical certification from Anthropic. Structured along the five weighted exam domains D1–D5 – no external material required.
View on epubli →From professional corporate websites and interactive single-page applications to high-converting online shops and fully backend-integrated web platforms – performant, SEO-optimised and mobile-ready.
Professional corporate websites and landing pages with clear structure, strong impact and technical quality. Fully responsive, Lighthouse-optimised and GDPR-compliant.
Complex interactive web applications with modern frameworks. From dynamic dashboards to database-backed platforms – cleanly architected and maintainable.
Seamless connection of modern frontend and Java backend. REST APIs, Spring MVC, database connectivity and deployment on cloud infrastructure – all from one developer.
Online shops that don’t just look good – they sell. From lean Shopify and WooCommerce stores to bespoke headless-commerce platforms with a Java backend – conversion-optimised, lightning-fast and secure at checkout.
Interested in a website, an online shop or a web application? Here is how it works: initial consultation, concept with a quote, implementation in stages, handover with a walkthrough. Describe your project – I will get back to you with an assessment.
Request a Website →From the first content idea to the finished post: I combine Claude with design tools like Canva and turn that into a workflow which delivers consistent, on-brand content – for freelancers, small businesses and personal branding.
Reels, carousel posts and stories – concept, copy and production all handled by me. I develop formats that fit your brand instead of filling in generic templates. You get finished assets, not a list of ideas.
Reusable design templates for a consistent brand appearance across every channel. Colours, typography and imagery are defined once – after that every new post takes minutes instead of hours. The templates stay with you and remain usable without me.
Via the Model Context Protocol (MCP), Claude drives the design tool directly. That gets you from concept to finished asset faster, with no copying back and forth. I set up the workflow and show your team how to run it themselves.
Systematically reworking existing content for new formats and channels instead of starting from scratch. One in-depth article becomes several posts, one post becomes a reel. Plus an editorial plan that fits your day-to-day and does not stall after two weeks.
I use this workflow myself – the examples on my Instagram profile were created with it.
Send an enquiry →Answers to the most common questions about Java backend development, AI integration and working together.
Homan Sarwary works as a software developer and Java freelancer: on site in Frankfurt/Rhine-Main and remotely across the entire DACH region (Germany, Austria, Switzerland). Further on-site assignments are possible by arrangement.
Yes. Homan Sarwary integrates LLMs directly into existing Java/Spring backend systems via Spring AI and LangChain4j. The result is REST APIs with AI features, streaming responses and Kafka connections – without rebuilding the existing infrastructure.
Homan Sarwary works on a project basis or at daily or hourly rates as a freelance developer – on site in Frankfurt/Rhine-Main, remotely across the entire DACH region, with further on-site assignments by arrangement. Options include dedicated project assignments (Java backend, microservices), time-boxed AI integrations and AI readiness assessments with a fixed-price PoC in 4–6 weeks. The specific terms are tailored to each project after a free initial consultation.
Yes. Homan Sarwary works directly for companies as well as through staffing agencies and project platforms. Enquiries via either route are welcome through the contact form.
Through the AI readiness assessment, Homan Sarwary identifies the processes with the highest AI leverage and builds a working proof of concept with the Claude API within 4–6 weeks. Existing Java/Spring systems are connected without rebuilding the infrastructure.
For business access (API, Team, Enterprise), Anthropic’s commercial terms state that customer data is not used for training by default. Where data must not leave the EU, Homan Sarwary deploys Claude via Amazon Bedrock or Google Cloud in EU regions. Personal data is minimised or pseudonymised beforehand. The data processing agreement is concluded directly between the company and the provider; the legal assessment is made by the company’s own data protection officer.
Yes. Homan Sarwary is the author of two published books on the Claude AI platform by Anthropic (publisher epubli, 2026). “Claude KI – Das Praxisbuch” (ISBN 978-3-565-54635-0) covers prompt engineering, the Claude Agent SDK, the Model Context Protocol (MCP) as well as security and compliance. “Professioneller Leitfaden zu Claude KI” (ISBN 978-3-565-54667-1) prepares readers for the official Claude Certified Architect – Foundations (CCA-F) certification. Both books are written in German.
Homan Sarwary can be reached by email at info@honar-it.com and by phone or WhatsApp on +49 176 722 47 486. Enquiries are answered within 24 hours. The location is Frankfurt am Main; collaboration takes place on site in Frankfurt/Rhine-Main or remotely across the DACH region, with further on-site assignments by arrangement.
On site in Frankfurt/Rhine-Main, remotely across the DACH region, further on-site assignments by arrangement. Check my current availability on FreelancerMap or get in touch directly.
Whether Java backend, AI integration, process automation or website – describe your project. I will get back to you within 24 hours.
Fill in the form – I will get back to you within 24 hours.