Jan Kasper

Java Developer

I build robust, scalable backend systems and enterprise applications.

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ABOUT

Innovative Java Developer with 5+ years of fullstack experience, specializing in building robust, scalable applications. Proficient in Java 17, Spring Boot, and modern frontend frameworks like React and Angular. Experienced in cloud-native development using AWS and Google Cloud Platform, with a strong background in microservices architecture and containerization (Docker, Kubernetes).

Passionate about clean code, performance optimization, and implementing best practices in software development. Skilled in agile methodologies and DevOps practices, with a track record of successfully leading cross-functional teams to deliver high-quality software solutions. Committed to continuous learning and staying updated with emerging technologies in the Java ecosystem.

Seeking to leverage my technical expertise and collaborative mindset to contribute to cutting-edge projects and drive innovation in a dynamic development environment.

EXPERIENCE

P&T Software House

2021 - PRESENT

Build and maintain enterprise applications across social media, legal services, and regulatory compliance domains. Lead development of critical components including mobile platforms, secure whistleblowing systems, and procurement tools. Implement cloud-native architectures and CI/CD pipelines to ensure high availability and security.

Java DeveloperFull Stack DeveloperMobile DeveloperCloud ArchitectureDevOpsMicroservicesSecurityCI/CDKubernetesDockerGraphQLPostgreSQLFlutterVue.jsTypeScriptAWSGoogle CloudAzure

Keylane

2019 - 2021

Develop and maintain core features of an enterprise SaaS platform serving major insurance clients with €92M+ annual revenue. Implement software solutions based on client requirements while mentoring junior engineers. Collaborate in cross-functional teams using Agile methodologies to deliver high-quality solutions.

JavaSpring BootREST APIsSQLJUnitAgileGitMaven

PROJECTS

LegalTegirty

Tech Lead · Java Developer
RegTech | EU Whistleblowing Platform

Led development of a secure enterprise whistleblowing platform ensuring EU Directive 2019/1937 compliance. Architected a distributed system handling anonymous reporting, secure file processing, and real-time communication. Implemented enterprise-grade security with AES-256 encryption and metadata removal. Built scalable cloud infrastructure achieving 99.9% uptime.

JavaSpring BootPostgreSQLVue.jsKubernetesGraphQLOpen Telecom CloudMicroservices

Telius

AI Advisor · Senior Software Developer
AI-powered Outbound Telephony Platform

Developed a scalable backend for an AI-powered telephony platform handling 10K+ concurrent WebSocket connections. Implemented real-time speech processing with Deepgram and OpenAI, achieving 35% higher transcription accuracy. Built GDPR-compliant conversation management system with sentiment analysis and adaptive AI voices. Integrated Twilio for call handling and Firebase for real-time data processing.

Node.jsWebSocketsPostgreSQLTwilioTelnyxFirebaseOpenAIGroqAIElevenlabsDeepgramLangfuse

Social Media App

Tech Lead · Mobile Developer
Social Media | Mobile-First Application

Headed the development team of a cross-platform social media app reaching 10K+ daily active users. Architected a serverless cloud infrastructure with modular design for high availability. Implemented real-time features including live chat, push notifications, and media processing. Optimized API response times by 50% and reduced deployment time by 30% through automated CI/CD pipelines.

FlutterTypeScriptFirebaseGoogle CloudDockerGraphQLPostgreSQLHasura

42Stages

Java Developer
FinTech | Regulated SaaS Platform

Led development of a comprehensive SaaS platform for EU-regulated organizations to manage non-financial risks. Architected and implemented features including risk assessment workflows, business process modeling, and report generation. Designed and built microservices architecture (Spring Boot, PostgreSQL, Kubernetes) ensuring high availability and scalability.

Java 17Spring BootPostgreSQLKubernetesAWSTerraformGithub Actions

Keylane

Java Developer
InsurTech | Enterprise SaaS

Contributed to core insurance platform development, powering €92M in annual revenue. Developed RESTful & GraphQL APIs, enabling seamless data integration for major insurers. Improved DevOps workflows (Docker, GitLab CI/CD, AWS), reducing release cycles by 30%.

Java 11Spring BootPostgreSQLAWS

CONTACT

I'm currently open to new opportunities. Whether you have a question or just want to say hi, I'll do my best to get back to you!

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