I'm a Java backend engineer with about 3 years of experience building REST APIs, async jobs and
third-party integrations with Spring Boot and MySQL. At Sunbase, a cloud CRM/ERP for solar installers,
I owned modules from requirements to production and shipped them in 1–2 months where similar modules
usually took 6–8. I was promoted within 16 months and kept the platform running as the last engineer
of a 30-person team.
3 yrsprofessional experience
2–4kcalls a day through my Twilio module
~500customer accounts using modules I built
~20production issues fixed every week
Company work. The code is private, so these are descriptions only.
Twilio Telephony & Campaigns
Built solo, backend and frontend, for 20 customer accounts making 2,000–4,000 calls a day: IVR with routing, recording and voicemail, browser softphone, power and predictive dialers, and SMS campaigns sending 10,000–20,000 SMS a day with @Async batching.
Spring BootSpring Data JPAMySQLTwilio
Marketing Hub & Social Media
One dashboard for GA4, Search Console, DataForSEO, Meta Ads and Google Ads through scheduled sync jobs and live API calls with Spring Cache, plus post scheduling and AI auto-replies for WhatsApp, Facebook, Instagram and LinkedIn.
Spring BootSpring CacheMeta & Google APIs
AI Voice Agents
Agents that call qualified leads and answer inbound calls on the company number, talk to the customer and book appointments into the CRM. Piloted with 2 customer accounts.
Spring BootVapi
Click-Tracking Engine
A JS tracker on JSP pages sends page, session and click events to a Spring Boot API, stored in MySQL by visitor, session and page for internal product analytics.
Spring BootMySQLJavaScript
Learn Module & Knowledge Base
Multi-tenant course platform for client teams and Sunbase master courses, plus a Knowledge Base with an AI assistant answering user questions.
Servlets/JSPMySQLLlama / Ollama
PBLib Simulation Engine
A Python library and a solar energy production simulation engine on top of it, similar in purpose to PVWatts and Aurora.
Python
