Kleo
Geos

Backend/Python developer building small, reliable automation tools: invoice generators, crypto payment (USDT/USDC) integrations, and freelance billing scripts. I ship clean zero-dependency CLIs with tests and clear docs. Open-source portfolio: github.com/kleogeos.

Work experience

Self-employed / Freelance

October 2026 – Current time

Job title

Backend Developer (Node.js / Python)

Work experience & achievements

Independent developer building and maintaining open-source freelance/crypto tooling: invoice & proposal generators, USDT/crypto payment utilities, and automation scripts (rate-limited queues, API integrations). All work is published and verifiable on GitHub (github.com/kleogeos) and npm, with test suites and live demo sites. Built working portfolio prototypes demonstrating scope-ready delivery: a REST API backend with a custom DB schema, a Telegram bot with Bot API + Stars payments, and an SEO/technical site audit tool.

Education

Not specified

No gigs added yet

Freelance Invoice CLI

Zero-dependency Node.js CLI that generates branded HTML invoices from a JSON file - line items, tax, due date, custom logo/colors. Used as the core renderer behind a small freelance tooling suite (crypto invoicing, late-fee calculator, currency converter). Open source: github.com/kleogeos/freelance-invoice-cli

SQLite Items REST API

Express + Sequelize + SQLite REST API with full CRUD on a single table (id, name, description) - POST/GET/GET:id/PUT:id/DELETE:id, ORM models, 9 automated tests all passing. Delivered as a ready-to-run repo with README. Built as a direct response to a real client request for exactly this kind of task. Open source: github.com/kleogeos/sqlite-items-api

ERC20 Token Stats API

Express REST API that returns price, market cap and 24h volume for any ERC20 token (CoinGecko, no key needed), with an in-memory TTL cache so repeated lookups don't rate-limit. Holder count is a pluggable source (Etherscan Pro only, returns null+reason otherwise, not faked). 6 automated tests, verified live against a real token. Built as a scoped response to a real client job post. Open source: github.com/kleogeos/erc20-token-stats-api

Twilio Bulk SMS Queue (rate-limit + retry)

Rate-limited send queue for bulk Twilio SMS: paces sends, retries only retryable errors (429/code 20429) with exponential backoff, and keeps going through individual failures (invalid number, unsubscribed) instead of silently halting the whole campaign. Returns per-recipient sent/failed status. 9 automated tests, runnable demo included. Open source: github.com/kleogeos/twilio-bulk-sms-queue

DNS Email Auth Checker (SPF/DKIM/DMARC)

Zero-dependency Node.js CLI that checks a domain's SPF, DKIM and DMARC DNS records and explains exactly what's missing or misconfigured in plain English (not raw RFC text) - checks SPF lookup-count limits, +all/no-all mechanisms, DMARC p=none/missing rua=, and DKIM selector/revoked-key status. 13 automated tests (offline, mocked DNS), verified live against real domains. Built after taking on a Google Workspace / DNS setup job (SPF/DKIM/DMARC records). Open source: github.com/kleogeos/dns-email-auth-checker

SEO Index Audit CLI (robots.txt/sitemap/meta-robots)

Zero-dependency Node.js CLI that audits a site's robots.txt, sitemap.xml and homepage meta robots/X-Robots-Tag for issues that block search engines (Google, Baidu, Bing, Yandex) from crawling and indexing it - flags blocking Disallow rules, a specific crawler blocked by name, sitemap URLs returning HTML error pages, zero-entry sitemaps, and noindex tags. 25 automated tests (offline, mocked fetch), verified live against real sites. Built while doing a technical SEO/indexing audit job (robots.txt + sitemap review for Baidu crawlability). Open source: github.com/kleogeos/seo-index-audit-cli

KleoGeos