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Aleksandr Lepesii

@aleksandrlepesii

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Senior engineer, 8 years. I build LLM systems and the measurement that says whether they actually work.

Thailand

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What I'm looking for

I'm looking for a forward-deployed, applied-AI, or solutions-architect role building reliable LLM products with customers. I want a fast-shipping team that treats reliability as measurable, and I'm open to remote work in APAC hours or relocation.

I build and run LLM products end to end. Vouch is mine: a live product that writes a CV and cover letter from a corpus of your own experience and refuses to invent anything. A model drafts, an evaluation loop checks every claim against its sources, and a human approves before a document leaves. Roughly 14,000 lines of Python behind 424 tests, running on Cloud Run with Postgres and object storage.

The measurement is the part I care about. The grounding check reads 88.3% on the production generator, and swapping the generator moves that by about seven points, which is why I never quote the figure without naming the model. The judge itself is held to a hand-labelled 342-claim set: 93-96% accuracy on replay, 0-3% false negatives, 6-10% false positives. Ranges rather than points, because the rare class is 39 examples and a single claim moves the miss rate two and a half points. The method, and the failure that taught it to me, are written up at leansii.com/grounding, with a runnable benchmark at github.com/leansii/grounding-bench.

Before that: a contract as lead contributor on an AI-agent platform, where I also built the agentic development tooling the team worked with; lead front-end engineer at ecom.tech, cutting release lead time from 10 days to 6 minutes and architecting a multi-tenant platform for 12,000+ users; team lead at Sberbank across five product teams and six production platforms under a 99.5% SLA; and co-founder of a B2B ERP SaaS sold to 300+ companies.

Experience

Work history, roles, and key accomplishments

Current

Software Engineer

Current

Self-employed

Sep 2026 - Present (1 month)

Independent engineer working through my own company. Building and running Vouch, a live LLM product that writes CVs grounded in a real corpus and refuses to invent: retrieval, guardrails, an LLM-as-judge evaluation loop, deployment and operations. Publishing the measurement method and a runnable grounding benchmark at leansii.com/grounding. Open to senior remote roles.

Software Engineer (Contract)

Canonix

Nov 2025 - Aug 2026 (9 months)

Lead contributor on an AI-agent platform: surfaces for creating tools, guardrails and connectors, and integrations over an MCP gateway. Built the agentic dev tooling the team used, including a parallel four-reviewer code-review pipeline with visual diff. Python in the eval and guardrails engine, SSE streaming, agent graphs in LangChain and LangGraph. Ran in production with enterprise customers.

Engineering React Angular TypeScript Python fastAPI Go PostgreSQL Docker CI CD GCP Kubernetes LLM RAG

Lead Frontend Engineer

ecom.tech (ex Samokat.tech)

Nov 2022 - Nov 2025 (3 years)

Led frontend development and launch of the Corporate Portal MVP, now the core internal platform for 10,000+ employees: org structure, knowledge base, booking and workflows. React and Feature-Sliced Design, plus a custom CLI generator that cut module setup time 40% across 21 teams. Moved cloud storage deploys from manual VMs to CI/CD: release 10 days to 6 minutes, production errors halved.

Co-founder & Technical Director

2mrw.tech

Sep 2021 - Aug 2023 (1 year 11 months)

Co-founded and ran an 8-person agency (designer, analyst, 5 developers, QA). We built a modular B2B ERP for a construction company, which then sold it to 300+ of its contractors: workforce tracking, document approvals, kanban, Gantt with forecasting. Microservices on Kubernetes; Vue/TypeScript, FastAPI, Nest.js, PostgreSQL. I designed the architecture and implemented RBAC across all modules.

Team Lead Frontend Engineer

Sberbank

Jun 2021 - Nov 2022 (1 year 5 months)

Led 5 product teams (~9 frontend, 3 backend) on logistics platforms at Sber Logistics, serving 19,500+ pickup points and 13,000+ partners under a 99.5% SLA, and launched 6 production platforms. Led the 3-engineer team that designed and shipped an OTP microservice in Python/FastAPI, Celery and Kafka, integrated with 100+ systems, in 7 working days including the design sessions.

Frontend Developer

DPD in Russia

Jun 2020 - Jun 2021 (1 year)

Improved user and operational experiences at DPD, one of the largest parcel delivery services in Russia. Redesigned the core order form reducing order creation time by 80% and increasing new order volume by 28%, and migrated a legacy Angular 1.5 monolith to Vue.js.

Full-stack Developer

Fitness-revolution

Jan 2019 - Jul 2020 (1 year 6 months)

Full-stack work for a national fitness club chain: digital presence, member retention and marketing tooling. Delivered 50+ responsive landing pages in WordPress, then migrated them to a centralized Multisite setup. Built a members' SPA in Vue.js and Express.js for at-home workouts and meal plans, with payment and analytics integrations on Node.js and PostgreSQL.

Project Manager

Delta Solution

Jun 2017 - Jan 2019 (1 year 7 months)

Managed distribution projects for server and data-centre hardware.
• Quanta Computers server equipment (ODM hardware used by hyperscalers)
• Open Compute Project (OCP) standard equipment
• Server components: HDDs, SSDs, GPUs
Ran delivery projects end to end, coordinating vendors and B2B clients. This was my last role before moving into software engineering full-time.