Alexandr Sopilnik
Msanidi Programu Kamili | Rust, TypeScript, JavaScript | Ujumuishaji wa AI
Gundua viungo vyao na sehemu nyingine ya wasifu huu ili kuwajua wao ni akina nani. Zinn Hub huweka wasifu wa kila Zinner wazi na uwazi — ili uweze kujenga uaminifu na kuajiri kwa ujasiri.
Ujuzi Umethibitishwa na Zinn Hub
Zinner AliyethibitishwaAlexandr Sopilnik imethibitisha ujuzi wao kwa Zinn Hub na kutoa ushahidi wa kazi yao. Kila Zinner Aliyethibitishwa hupitia ukaguzi wa uhakikisho wa ubora wa vitendo — ili uweze kuajiri kwa ujasiri.
🛡️ Imethibitishwa tangu September 2026
Kuhusu
Full-stack developer with 10+ years in IT. I build and fix web, desktop and mobile apps, APIs and Chrome extensions in TypeScript, JavaScript and Rust. That includes Lovable and Bolt apps that aren't ready for real users yet. I also add AI features to existing products: LLM integrations, document search and chatbots.
Stack:
- Languages: TypeScript, JavaScript, Rust, SQL, HTML, CSS/SCSS
- Front end: React, Next.js, responsive interfaces that I design myself and build without templates
- Back end: Node.js (Express, NestJS), Deno, Rust (axum), REST and gRPC APIs, Kafka
- Databases: PostgreSQL with row-level security, MySQL, MariaDB, MongoDB, Redis, Supabase
- AI: LLM integrations that check the model's output before saving it, vector search on pgvector, RAG chatbots that answer from your files
- Platforms: WordPress and WooCommerce, multilingual sites with WPML, Chrome extensions (Manifest V3), desktop apps with Tauri, mobile apps in React Native
- DevOps: Docker, Kubernetes, Helm, werf, CI/CD on GitHub Actions and GitLab CI
- Integrations and automation: payment providers, third-party APIs, scheduled jobs with an alert if one stops running
What I take on:
- Apps built with Lovable, Bolt, Cursor or v0 that work for the founder but aren't ready for real users: broken sign-in, failing payments, missing access rules, code nobody wants to touch
- New web apps from the database to the interface, plus landing pages and multilingual sites
- AI features in an existing product: LLM summaries and scoring, search over your documents, chatbots that cite their source
- Bug fixes and performance work on slow pages, API endpoints and database queries
- Backends, APIs and command-line tools in Node.js or Rust
- Desktop, mobile and browser-extension projects
Experience:
- Supabase in production: scheduled TypeScript functions, LLM steps whose output is checked before it is saved, pgvector search, an alert whenever a scheduled job stops running, and CI on every push to main
- Access control inside PostgreSQL: row-level security policies and a separate role for each subscription tier, so users see only what their plan allows
- A legacy PHP backend rewritten in Node.js/TypeScript without breaking its API; median response time on the main endpoints fell roughly 3×
- A jQuery front end moved to React page by page while the product stayed live
- Rust backends: axum microservices on PostgreSQL and Redis that talk to each other through Kafka and gRPC, with a REST API for the front end
- Open source: reqwest-rotate, my Rust crate for proxy rotation, per-host rate limits and retries in the reqwest HTTP client, published on the official Rust registry
- Live demos and client work are in my portfolio, and my public code is on the GitHub account linked to this profile.
How I work: async and in writing. I write the scope down before I start. Well-defined work gets a fixed price; open-ended work is billed hourly until the scope is clear. You get a short written update at the end of each working day, and no calls are needed. I work 10:00–20:00 Almaty time (UTC+5), which covers most of the European working day and the start of the US East Coast day.
Ili kuanza, nitumie ulicho nacho (repo, programu hai au maelezo mafupi) na unachohitaji. Nitajibu kwa mpango ulioandikwa na bei. Ikiwa ungependa kuona jinsi ninavyofanya kazi kwanza, tunaweza kuanza na kazi moja ndogo ya bei isiyobadilika, kama vile kurekebisha hitilafu moja.
Ujuzi
Teknolojia na utaalamu ambao mfanyakazi huyu huru ana utaalam ndani yake.
Kategoria
Maeneo ya huduma ambayo mfanyakazi huyu huru anapatikana.
Kwingineko
Msimamizi wa Formline: Paneli ya msimamizi ya Next.js
Ofisi ya nyuma ya duka langu la onyesho la Formline, wazi kujaribu bila kujisajili: kila mgeni anapata sanduku la faragha lenye data ya onyesho. Wafanyakazi huchakata maagizo, huweka katalogi na kufuatilia hisa, na maagizo ya majaribio ya Stripe yaliyolipwa kutoka dukani hufika kupitia webhook iliyosainiwa. Majukumu manne ya wafanyakazi, kutoka kwa mmiliki hadi mtazamaji wa kusoma tu, yana haki tofauti; kuingia kunasaidia programu ya uthibitishaji na funguo za siri. Imejengwa kwa Next.js, React na TypeScript kwenye PostgreSQL na Drizzle; usalama wa kiwango cha safu huweka kila nafasi ya kazi kando. Inaendeshwa katika Docker, na majaribio ya Vitest na Playwright katika CI.
Backend ya dawati la biashara ya uchaguzi
Mradi wa mteja: Nilipanua backend ya Supabase ya dawati linalofanya biashara ya masoko ya utabiri wa uchaguzi. Kazi zangu za TypeScript zilizopangwa hupiga picha za vitabu vya Kalshi, hupata masoko mapya ya uchaguzi, huandaa wasifu wa wagombea na kutoa arifa; LLM (Qwen) huandika muhtasari wa saa wa mbio kwa wafanyabiashara na hupima maoni ya YouTube. Pia niliongeza mlisho wa habari na utafutaji, maandalizi ya RAG kwenye pgvector na CI kwenye kila msukumo hadi kuu. Kila kazi niliyoongeza huripoti mapigo ya moyo, na mlinzi wa saa huarifu wakati kazi inanyamaza au bei zinaacha kufika. Mmiliki alipata mwongozo wa usanidi na video ya kutembea.
Bookkeeper Tweaks: Chrome extension
A free, open-source Chrome extension (Manifest V3) with four small fixes to the Xero pages bookkeepers use every day. The Approve button on an invoice does the action you choose, approved invoices print without downloading a PDF first, long lists get page navigation at the top, and a button sorts the current Find and recode page by description. It runs only on go.xero.com, with one permission and no analytics or remote code. Built in TypeScript; CI runs lint, type checks, Vitest unit tests and Playwright end-to-end tests of the built extension. Not affiliated with or endorsed by Xero Limited.
Formline: Duka la Next.js na Stripe
Duka unaloweza kubofya: mabango 16 katika makusanyo 4, vichujio na utafutaji unaobaki kwenye URL, kikapu, mandhari mepesi na meusi, na malipo yanayoishia kwa agizo la onyesho au kikao halisi cha Stripe Checkout katika hali ya majaribio. Niliijenga kama usafirishaji tuli wa Next.js katika TypeScript na Tailwind CSS. Picha za mabango huzalishwa kutoka violezo vya SVG na kutolewa kwa PNG wakati wa ujenzi. Malipo ya kadi hupitia Cloudflare Worker ambayo hupanga upya bei ya kikapu kwenye seva na kuthibitisha saini ya webhook ya Stripe. Vitest na Playwright hujaribu kukimbia katika GitHub Actions kila mara; kusukuma kwa kuu hupeleka tovuti.
reqwest-rotate: crate ya chanzo huria
Kifungashio kidogo cha reqwest kwa scrapers na wateja wa API wanaohitaji mzunguko wa proksi, kikomo cha kiwango kwa kila mwenyeji na kujaribu tena na backoff, bila kuvuta mfumo wa middleware. Imechapishwa kwenye crates.io na hati, CI na takriban majaribio mia mbili.
Tovuti ya kibinafsi ya lugha mbili katika Next.js
Tovuti ya kibinafsi ya ukurasa mmoja kwa Kiingereza na Kirusi, na sehemu ya huduma na viungo vya miradi yangu ya onyesho. Niliibuni na kuijenga na Next.js, React na TypeScript kama static export, iliyopambwa na CSS Modules tupu na hakuna mfumo wa UI. Ina mandhari mepesi na meusi, na picha ya hakikisho ya kijamii kwa kila lugha inazalishwa wakati wa kujenga. GitHub Actions huijenga na kuipeleka kwa Bunny CDN, ambayo huongeza vichwa vya usalama na kuelekeza www na HTTP tupu kwa anwani kuu ya HTTPS.
Huduma ndogo za Rust, backend ya EdTech
Niliijenga backend: huduma za Rust kwenye axum, Kafka kwa matukio kati ya huduma, PostgreSQL na Redis, gRPC ndani, REST kwa upande wa mbele wa React. Docker, CI/CD. Mteja chini ya NDA.
Backend ya PHP iliyoandikwa upya katika Node.js/TS
Niliandika upya backend ya jukwaa la wavuti la mteja kutoka PHP ya zamani kwenda Node.js/TypeScript na kuweka API ya umma sambamba, kwa hivyo upande wa mbele ulisafirishwa bila kubadilika. Muda wa wastani wa majibu kwenye vituo vikuu ulipungua kwa takriban mara 3. Usambazaji ulihamishwa kwenda Docker na CI/CD. Mteja chini ya NDA.
Uhamiaji wa jQuery kwenda React, programu hai
Nilihamisha upande wa mbele wa jQuery kwenda React ukurasa kwa ukurasa wakati bidhaa ilibaki katika uzalishaji. jQuery imeondoka, UI inategemea vipengele, na vipengele vipya vinajengwa kwenye upande wa React. Mteja chini ya NDA.
Programu ya React + Node.js + PostgreSQL
Niliijenga upande wa mbele, backend na hifadhidata kwa mteja: React, TypeScript kwenye Node.js, PostgreSQL, ilisafirishwa kama huduma moja inayoweza kusambazwa na CI/CD. Mteja chini ya NDA.
Zana za CLI za Rust na scrapers
Huduma za mstari wa amri, scrapers na parsers katika Rust zinazokusanya data ya kikoa kidogo kwa wateja (async, reqwest, scraper, serde). Mzunguko wa proksi na utunzaji wa kikomo cha kiwango wakati tovuti inahitaji; malengo yanatoka kwa HTML tuli hadi kurasa zilizotolewa na JS. Vyanzo na seti za data ziko chini ya NDA.
Sim ya shule ya Gladiator katika Rust/Bevy
Sim ya usimamizi na mapigano yaliyosimuliwa kabla na logi ya matukio, mfumo wa eneo la hit la d20, AI ya matumizi na safu ya uchumi. Imejengwa kwenye Bevy ECS, na seti ya majaribio ya kiotomatiki.
Zinns — Tayari Kununua Huduma (18)
Huduma zilizo tayari zinapatikana kwa ununuzi wa haraka — vinjari, nunua, na uanze mara moja.
Nitaunda chatbot ya RAG inayojibu kutoka kwa hati zako na kuonyesha chanzo
Nitajenga programu yako ya React Native kwa Android na iOS, iliyounganishwa na backend yako
Nitaweka usalama wa kiwango cha safu ya PostgreSQL ili kila mtumiaji aone data yake tu, Supabase imejumuishwa
Nitaweka programu yako ya Node.js, Next.js au Rust kwenye Docker na kusanidi CI/CD na GitHub Actions au GitLab CI
Nitaondoa jQuery yako au React ya zamani na kuihamishia kwenye React ya kisasa au Next.js, ukurasa kwa ukurasa
Nitatengeneza au kusanidi duka lako la WooCommerce: malipo, usafirishaji na bidhaa
Nitatengeneza makosa ya WordPress baada ya sasisho au mgogoro wa programu-jalizi, nitahariri mandhari yako na kuharakisha tovuti yako
Nitajenga upande wako wa mbele wa React au Next.js kutoka muundo wa Figma na kuuunganisha na API yako
Nitatengeneza programu uliyojenga na Lovable, Bolt, Cursor au v0 na kuiandaa kwa watumiaji halisi
Nitajenga tovuti yako mwisho hadi mwisho: React au Next.js mbele, Rust au Node nyuma
Nitajenga backend ya Node.js na Express au NestJS
Nitachunguza programu yako ya React au Next.js na kuifanya iwe haraka, na namba
Micro Zinns (1)
Vipimo vidogo, vya bei maalum kuanzia $5 — kazi za haraka unazoweza kununua kwa mbofyo mmoja, au njia isiyo na hatari ya kujaribu Zinner kabla ya agizo kubwa.
