Hi, I'm Jonas KabaloSenior Full-Stack Engineer
& AI Builder
I build intelligent, scalable products at the intersection of AI, FinTech and the web.
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Experience Timeline
8+ years shipping production software across the UK and France — from FinTech to enterprise platforms and AI.
Full Stack Developer
Freelance- Integrated LLM APIs (OpenAI, Anthropic) into client web applications, enabling intelligent context-aware features
- Designed and built autonomous agent workflows with multi-step reasoning, tool use, and decision-making pipelines
- Engineered LLM intelligence layers including prompt engineering, retrieval-augmented generation (RAG), and output evaluation frameworks
- Delivered full-stack solutions in Vue.js, React, and Node.js with AI capabilities embedded across the stack
Frontend Developer
Tui Media- Integrate AI-powered features including natural language processing and voice control interfaces into web applications
- Implement machine learning algorithms to enhance user experience through adaptive system responses and personalized interactions
- Develop and optimize responsive, interactive, and scalable front-end solutions using Vue.js and React
- Ensure smooth integration with AWS services and leverage Docker for containerized deployments
- Manage version control and collaboration using GitHub
- Work closely with designers and backend developers to create seamless user experiences
- Contribute to the development of high-quality, user-friendly web applications for clients such as Deloitte
- Propose UI/UX improvements based on user feedback and data analysis
Key Projects
Deloitte Talent Management Platform
Built internal employee growth platform enabling managers to track professional development with comprehensive CMS for HR content management and progression metrics.
AI-Powered Applications
Developed multiple AI solutions with voice control interfaces, natural language processing, and adaptive learning algorithms that improve system responses through user feedback analysis.
Full Stack Engineer
IT Services Company- Developed and delivered a high-quality web application, handling both frontend and backend development
- Built a responsive and dynamic user interface using Nuxt.js and implemented Vuex for efficient state management
- Integrated GraphQL API and PostgreSQL for seamless data management
- Built serverless backend using AWS Lambda and API Gateway, improving API response time by 30%
- Implemented CI/CD pipeline with Jest.js and CircleCI for automated testing
- Collaborated with designers and project managers to align technical solutions with client requirements
- Incorporated AI features including voice control into web applications
- Create AI model performance through systematic testing and output evaluation processes
Key Projects
Infrastructure Investment Platform
Built comprehensive loan management platform featuring intuitive CMS, interactive data visualization, and real-time investment performance analytics for large-scale infrastructure investors.
Full Stack Engineer
Funding Invoice- Built scalable, secure web applications with GraphQL APIs integrated with Vue.js
- Managed PostgreSQL databases and implemented CI/CD pipelines with unit testing for quality assurance
- Optimized application performance and user experience
- Collaborated with clients and cross-functional teams to translate business requirements into technical solutions
- Delivered projects on schedule while maintaining high code quality standards
Key Projects
Internal Financial Management System
Built comprehensive financial tracking solution enabling staff to manage bank statements, transaction records, and payment statuses with automated follow-up processes.
Integrated CMS & Investor Dashboard
Developed real-time content management system allowing staff to update live financial metrics and performance data on investor dashboard, eliminating developer dependencies and enhancing operational transparency.
Frontend Web Developer
TheTwoW- Developed interactive and intuitive user interfaces using HTML, CSS, and JavaScript
- Implemented jQuery to enhance website functionality
- Ensured responsive design across multiple devices and browsers using CSS Flexbox
- Collaborated with UX designers and backend developers to deliver high-quality web solutions
Junior Web Developer
House London Trip- Developed clean, responsive, and user-friendly interfaces using HTML, CSS, and WordPress
- Created and customized WordPress themes to meet client requirements
- Collaborated with designers and developers to enhance web functionality and user engagement
Skill Constellation
The technologies I build with, mapped as a living graph. Hover a node to explore the depth behind it.
Frontend
- React 88%
- Vue / Nuxt 95%
- TypeScript 86%
- Next.js 80%
- React Native 68%
Backend
- Node.js 90%
- GraphQL 78%
- PostgreSQL 82%
- Python 72%
Featured Projects
Production platforms built across FinTech, enterprise and AI — shipped with real users and real constraints.
AI & FinTech
Two domains where I go deep — combining product engineering with intelligent systems and financial-grade reliability.
AI Engineering
I bring LLMs into production — voice and natural-language interfaces, prompt engineering, adaptive feedback loops, and systematic output evaluation. Built with OpenAI and Anthropic models.
FinTech
Years of building financial platforms — loan management, investor analytics, real-time metric dashboards and automated reconciliation — with data integrity and security at the core.
Case Studies
How I approach hard problems — the context, the architecture and the measurable outcome.
Infrastructure Investment Platform
Infrastructure investors needed a single platform to manage loans, track performance and surface live analytics without engineering involvement. I built the full stack — a serverless GraphQL backend and a Nuxt frontend with a self-service CMS and real-time dashboards.
- Cut API response time by ~30% via serverless architecture.
- Removed developer dependency for content & figure updates.
- Gave investors live visibility into portfolio performance.
Deloitte Talent Management Platform
Built for Deloitte as a client of Tui Media, this platform gives managers a structured way to track their teams' professional development and gives HR a CMS to manage growth content and progression metrics.
- Centralised professional-development tracking for managers.
- Empowered HR to manage content without engineering support.
AI Voice & NLP Application Suite
A suite of AI features integrated into production web applications: natural-language interfaces, voice control, and adaptive responses that learn from user feedback to continuously improve quality.
- Brought conversational & voice UX into production apps.
- Improved response quality through continuous feedback loops.
Career Achievements
A snapshot of the outcomes behind the work.
Faster APIs via serverless
Re-architected backends on AWS Lambda + API Gateway, improving API response times by ~30%.
AI in production
Shipped voice-control and NLP interfaces with adaptive, feedback-driven responses into live web applications.
FinTech platforms
Delivered loan-management, investor analytics and financial-tracking systems for real-world finance teams.
Enterprise-grade delivery
Built an internal talent-management platform for Deloitte as a client, with a full HR CMS.
Automated quality
Established CI/CD pipelines with Jest and CircleCI, enabling confident, automated releases.
Mentorship & collaboration
Guided junior developers and led cross-functional delivery with designers and backend teams.
Let's build something exceptional
I'm open to senior & staff engineering roles and ambitious collaborations. Whether it's AI, FinTech or product engineering — I'd love to hear about it.