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 must not fail – and, as an experienced Java consultant, build the backends underneath. Over 10 years in banks and large corporations: Spring Boot, Kubernetes, AWS and Claude integration directly in the Java backend.
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Two focus areas for enterprise and mid-sized companies – Java backends that hold up under load and regulation, and AI that reaches production instead of staying a prototype.
Senior Java backends for regulated industries – banking, automotive, mobility, aviation. Spring Boot, microservices, cloud: from requirements through architecture to test automation, agile and AI-assisted. Java training for your team on request.
View reference projects →AI consulting and strategy, training and workshops, integrating Claude into existing systems, AI agents and process automation – through to a complete AI application. Java-native, without the Python detour.
View AI services →For smaller projects: Websites & online shopsContent & design with AI
Since April 2016 I have been developing modern, scalable, and proven software solutions.
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.
My key areas of expertise include in particular:
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 development mean the same solution.
As a Senior Java Backend Developer with proven enterprise experience 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. As a Spring Boot Freelancer with a demonstrated track record in demanding projects.
Project experience 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) with a lived DevOps culture. 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 the Claude Partner Network at Anthropic and 12 course certificates from the Anthropic Academy (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 Consultant and Spring Boot Freelancer – focused on the technologies that make enterprise systems scalable and future-proof.
Over 10 years of project experience at leading organisations in banking, automotive, rail and aviation – plus my own AI products in EdTech and PropTech.
Own product · Full-stack and AI engineering, sole responsibility
Background: An independent, multi-tenant SaaS practice platform (B2C and B2B) for training and exam simulations for the Anthropic CCA-F certification – built single-handedly from the initial idea through to live operation. Not authorised by Anthropic.
Responsibilities & approach
Results & impact
Reference project within a tender · self-employed
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 · self-employed
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
A comparable project in-house? 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 hat sich sehr schnell in das KTO-Development-Team integriert, die Rituale unseres SCRUM-Teams aktiv mitgestaltet und durch seine sachliche und ruhige Art zur Klärung von hitzigen Diskussionen beigetragen. Er hat sich zum Experten für Spring Boot, Spring REST Services, OpenAPI (Swagger), Spring Cloud Contracts und Cucumber entwickelt. Neben seiner Programmiertätigkeit hat er das Team im Architektur- und Security-Gremium vertreten und als Ansprechpartner für andere Teams fungiert. Er wird dem Team sehr fehlen."
„Homan hat sich sehr schnell in das Squad integriert und selbständig Aufgaben übernommen. Er hat aktiv an den Entwicklungsthemen mitgearbeitet und viele Verbesserungsvorschläge eingebracht. Seine Schwerpunkte lagen in Java SE/EE, RESTful APIs, Spring Framework, Apache Kafka, Testautomatisierung, Cloud-Technologien, Kubernetes, Azure, Microservices und ShedLock. Wir würden ihn jederzeit gerne wieder bei uns einsetzen."
A comparable project in your organisation? Describe it to me – I will respond within 24 hours.
Discuss Your Project →From AI consulting and Claude integrations to automation solutions and training – everything from a single source, with 10+ years of enterprise 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 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, Claude API, Agentic AI, Spring AI integration. From half-day workshops to multi-day intensive courses – remote 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.
You bring your domain know-how, I bring the technical delivery. Together we build an AI solution that creates measurable economic value – from the initial situation through to support after go-live.
You contribute your domain know-how, I bring the technical perspective. 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 guided, plannable go-live.
Support after go-live: further development and support as needed – so the solution delivers value in the long term.
Solutions that pay off – with a clear view of costs and benefits.
Defined KPIs instead of vague promises: the benefit becomes measurable.
Efficiency gains that feed into your revenue and cost calculations.
“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 source.
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? Describe your project – I will get back to you within 24 hours.
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 from a single source. 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.
AI-assisted content creation by combining Claude with design tools like Canva – via the Model Context Protocol (MCP) Claude drives the design tool directly – faster from concept to finished asset, with no manual 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 – I post fresh examples from it on my Instagram profile regularly.
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 in Frankfurt am Main, throughout Germany and across the entire DACH region (Germany, Austria, Switzerland) – both on-site and fully remote.
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 – remotely across the entire DACH region or on-site in Frankfurt am Main. 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.
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.
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) on prompt engineering, the Claude Agent SDK, the Model Context Protocol (MCP) as well as security and compliance, and „Professioneller Leitfaden zu Claude KI“ (ISBN 978-3-565-54667-1) preparing 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 remotely across the DACH region or on site.
Remotely across the DACH region or on site in Frankfurt am Main. 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.
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