Borut Balazek

Senior Software Engineer

Senior Software Engineer with 15+ years building and scaling full-stack and data-intensive products. Joined an EdTech platform as the first developer alongside the CTO and helped grow it from tens of thousands of users to millions, and later as the hands-on founding engineer on a real-time market-intelligence platform. Hands-on across TypeScript, Node.js, React, PostgreSQL, cloud infrastructure and DevOps, with experience in system design, performance and mentoring.

Employment CV

Applying for Senior Software Engineer, Senior Full-Stack, Senior Backend, Platform Engineer, hands-on Tech Lead or suitable Staff Engineer roles. Single-column and ATS-friendly.

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Founding Engineer CV

Applying for Founding Engineer, first-engineer, early-stage technical lead or hands-on CTO roles. Same facts as the employment CV, framed around product ownership and building from nothing.

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Consulting capability profile

Sending to consulting prospects, contract engineering leads, or companies evaluating Corco Labs. Leads with problems solved and proof rather than career history.

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Experience

Independent Product Development & Consulting

Self-directed · Mar 2026 - Present

Building AI-assisted software products and developer tooling, alongside selective consulting, while looking for the right long-term engineering role.

  • Two products built solo, end to end: Guestavo, a guest-engagement platform for hospitality venues (live in beta), and AfterGather, a media hub for photographers with QR-based guest uploads at live events (early access).
  • Developer tooling for AI-assisted engineering: versioned workflow definitions with a review gate per phase, and MCP servers that let coding agents read and write real project state.

Founding Engineer - Backend & Data Platform

MarketAlerts.com (contract via Corco Labs) · May 2024 - Mar 2026

AI investment-intelligence startup - real-time signals across 20+ global markets. Founding engineer and CTO, hands-on throughout. Wound down in March 2026.

  • Helped build an AI-powered market intelligence platform covering more than 20 global markets in real time, spanning web app, mobile app and CMS.
  • Designed and built the backend and data platform in TypeScript and Python/FastAPI: containerised ETL run per source as Airflow pods on Kubernetes over SEC filings, news, congressional trades, analyst ratings and insider transactions.
  • Built LLM-based classification using hierarchical GPT models to categorize financial signals, and an OpenAI summariser turning raw earnings-call transcripts into structured highlights - powering AI watchlists and investor-facing insights.
  • Owned architecture and infrastructure, including the cloud migration from AWS to GCP.

Senior Backend Engineer

Martian & Machine (contract via Corco Labs) · Aug 2024 - Feb 2025

Government smart-city programme in the Middle East, delivered across five city domains and several vendor teams.

  • Designed and built the backend architecture: 20+ microservices on Kubernetes across five city domains, each with its own database and API, using domain-driven design with clean contracts so several vendor teams could build in parallel.
  • Built the platform services the city domains ran on - user, onboarding, notification, certification and mail - in NestJS and TypeScript, with APISIX as the API gateway, Keycloak for identity and GitLab CI for delivery.
  • Translated specifications handed over by an external consultancy into C4 architecture models, which became the reference the vendor teams built against.
  • Designed the event-driven layer connecting IoT gateways to application services - Kafka for event streaming, Cassandra for time-series sensor data, plus PostgreSQL, Grafana and Keycloak.

Senior Software Engineer

Edukey Education Ltd (contract via Corco Labs) · Nov 2015 - Dec 2023

UK EdTech behind ClassCharts and Provision Map, acquired by TES Global. Eight years across their product range: ClassCharts, ProvisionMap with School Robins and Safeguard my School, Literacy Assessment Online and Report Comment Bank.

  • Joined as the first developer alongside the CTO and helped grow the platform from a few dozen schools and tens of thousands of users to thousands of schools and millions of users across the UK education system, remaining one of the two most prolific contributors across the product range and a team of more than a dozen engineers.
  • Modernized the product incrementally: rebuilt the legacy web application from jQuery to React, and migrated the mobile apps from native Android to React Native across both Android and iOS - teacher, student and parent, three apps on both platforms from one codebase.
  • Owned the mobile product end to end: the React web application behind the apps, push notifications, offline handling, and the release and signing pipeline for all six store listings.
  • Took the infrastructure through three generations as the load grew: Rackspace to GCP to AWS, from three servers to roughly 100 instances.
  • Brought Docker into the company in the mid-2010s and containerised both development and production, then prepared and carried the platform onto Kubernetes as it scaled.
  • Led the migration of 40+ TB of images and assets between cloud providers, writing the migration tooling, with the platform staying up throughout.
  • Introduced a more structured development process - GitFlow, CI/CD - and improved scalability through SQL query optimisation.
  • Owned testing and QA across the product range: introduced Cypress and the GitHub Actions workflows that ran it, built out unit and integration coverage and the CI deployment pipelines, and mentored the QA engineer who grew the suite out.
  • When UK schools closed in March 2020, helped ship homework file submission with virus scanning in under two weeks.
  • One of four code owners on the main repository, reviewing work across the codebase: mentored junior developers and onboarded the teams that joined as the company grew and was acquired by TES Global.

Independent Software Consultant

Corco Labs d.o.o. (Corcosoft, sole proprietorship, until 2025) · Aug 2012 - 2026

Independent consultancy used for freelance and contract work alongside the longer-term engagements above, which were all delivered through it. ~70 projects across web applications, infrastructure, integrations, IoT, data systems and product development.

  • Worked on projects for international organisations including Philips, RWE, Innogy, Danone and Les Mills, directly and through partner agencies.
  • Full lifecycle on each - scoping, architecture, delivery, deployment and long-term maintenance - working directly with clients in Germany, Austria, Switzerland, the UK, the US and Slovenia.

Web Developer

Alstar d.o.o. · Jun 2011 - Jan 2013

Slovenian unified-communications provider. First role, started as a student job.

  • Built and maintained client websites on Joomla plus e-commerce and business integrations, and customised vTiger CRM to match each client's sales and internal processes - working directly with clients from requirements through deployment.

Core technologies

Languages
TypeScript, JavaScript, PHP, Python, Rust
Frontend
React, Next.js, React Native, Astro, Tailwind
Backend
Node.js, Bun, NestJS, Fastify, FastAPI, Symfony, tRPC, GraphQL, REST APIs
Architecture
Microservices, Event-driven architecture, Domain-driven design
Data
PostgreSQL, MySQL, Redis, ClickHouse, Cassandra, Elasticsearch, Kafka, Airflow
Infrastructure
Docker, Kubernetes, Terraform, AWS, GCP, Azure, GitHub Actions, CI/CD
AI & LLM
OpenAI, Anthropic, Ollama, LLM classification pipelines
Testing & Observability
Jest, Vitest, Cypress, Playwright, Grafana

Education

Software Developer

School of Electrical and Computer Engineering Ptuj · 2007 - 2011

Languages

  • English - Fluent
  • German - Fluent
  • Slovenian - Native