Open to work · Portugal / Europe / Remote
8 years in proxy infrastructure

Yevhenii
Harba

8 years inside proxy infrastructure. Started in support, ended up building residential proxy products from scratch. I know this industry from the network layer to the pricing model.

Portugal · Europe · Remote · yevheniiharba@gmail.com · LinkedIn

What I've actually built

Not theory.
Real systems, running in production.

Everything below I built while working at a proxy company for 8 years. Most of it I figured out from scratch, without a team or a playbook.

02

BYOIP / ASN / GeoIP

Evaluating hosting partners for IP announcement, understanding what BGP vs static routing means for classification, working with GeoFeed to correct database records. Done across multiple setups.

  • Partner evaluation: BGP vs static routing
  • ASN setup and route object management
  • GeoFeed workflows and update cycles
  • POP alignment and classification stability
03

Compliance, abuse & throttling

Built the full compliance framework: AUP, DMCA handling, abuse intake and escalation, upstream communication. Also designed the throttling system controlling concurrent sessions and RPS per client, so one customer couldn't affect neighbors on the same server.

  • Abuse intake, classification, escalation
  • Concurrent session and RPS limits per client
  • Upstream compliance communication
  • AUP design and enforcement logic
04

Fair Usage Policy & pricing

Designed the FUP from scratch: traffic segmentation, thresholds, trigger logic, customer messaging. Then rebuilt the pricing model around it so the cost-per-GB economics worked at scale.

  • Traffic intensity segmentation
  • FUP thresholds and customer messaging
  • Cost-per-GB analysis and margin modeling
  • Competitor pricing benchmarking
05

Supplier procurement & partnerships

Finding proxy suppliers, running calls, negotiating GB-based pricing, technical due diligence before scaling. Built the full lifecycle: discovery, testing, production, rotation, exit.

  • Supplier discovery, calls, negotiation
  • Technical testing before production
  • Volume-based deal structuring
  • Supplier rotation without downtime
06

CRM & internal product specs

Wrote specs for internal tooling: usage and traffic reports, IP occupancy tracking per client, network and provider accounting in the CRM. Translated operational pain into requirements engineering could ship from.

  • Usage and IP occupancy tracking
  • Network and provider accounting logic
  • Spec writing from operational requirements
  • Internal QoL tooling for ops teams
07

Residential proxy architecture

Researched and designed residential proxy infrastructure from zero. Studied public patents from established market leaders to understand how the underlying architecture worked. Covered SDK supply, traffic routing, load balancer logic, throttling, compliance, and the full pricing model.

  • SDK supply model and DAU pool economics
  • Traffic routing and load balancer design
  • Compliance and consent framework
  • Full pricing model and cost structure
08

Scraper API & Web Unlocker

Researched scraper products from scratch: how JS rendering works, antibot handling, per-domain RPS constraints, compliance limits. Wrote the product spec, tier structure, and pricing before any code was written.

  • JS rendering, antibot, SERP, AI extraction
  • Domain-level RPS and compliance constraints
  • Core vs Advanced tier logic
  • Request-based pricing and margin structure

Expertise

Eight years in one industry.
A lot of ground covered.

I can talk to a network engineer about BGP and to a CFO about unit economics. Not many people in this space do both.

Proxy infrastructure

  • Residential, ISP, DCH architecture
  • Backconnect gateway and entry node logic
  • Sticky sessions and rotation behavior
  • HTTP(S) and SOCKS5 protocols
  • Enterprise use cases and access restrictions
  • Compliance, abuse handling, KYC workflows

IP routing & geolocation

  • LIRs, brokers, IP block acquisition
  • ASN setup, BGP vs static routing
  • ISP vs DCH classification and preservation
  • MaxMind, IP2Location, DB-IP, IPinfo
  • GeoFeed and database correction workflows
  • POP alignment and route propagation

Supplier & procurement

  • SDK-based residential supply and DAU economics
  • Supplier discovery, qualification, lifecycle
  • Technical and commercial due diligence
  • GB-based volume negotiation
  • SLA design and escalation process
  • Supplier diversification and risk management

Product & commercial

  • Scraper API architecture and product spec
  • Throttling: concurrent sessions, RPS isolation
  • Fair Usage Policy design and enforcement
  • Pricing models: per-GB and per-request
  • Competitor analysis: major industry providers
  • Spec writing and engineering handoff

Skills & background

A broader toolkit than one industry.

Started in support, moved through procurement into full product ownership. Skill depth below reflects that progression.

Product & strategy

  • Product management & go-to-market strategy · 4 yrs
  • Roadmap planning · 3 yrs
  • B2B product development · 4 yrs
  • Product analytics & A/B testing basics
  • SQL & data analysis · 4 yrs
  • Market research & analysis · 6 yrs

Infrastructure & technical

  • Infrastructure architecture · 5 yrs
  • BGP & traffic routing · 4 yrs
  • API integration (REST) · 4 yrs
  • Performance testing / QA · 6 yrs
  • No-code automation (n8n)
  • Figma (basic)

Procurement & business

  • Vendor & contract management · 6 yrs
  • Custom CRM + AI-built supplier database
  • Negotiation & communication · 6 yrs
  • Procurement & cost optimization · 6 yrs
  • Business development · 4 yrs
  • Budget & cost modeling

Compliance & risk

  • Cybersecurity compliance management · 5 yrs
  • Risk management
  • Business analysis & requirements analysis
  • Product research

AI & agentic coding

  • Claude Code · 1 yr
  • AI-powered research & analysis · 1.5 yrs
  • AI agents development · 1 yr
  • Prompt engineering · 1 yr

Soft skills

  • Cross-functional leadership & team management
  • Stakeholder management
  • Ambiguity tolerance
  • Written communication / spec writing

Domain experience

SaaS · 8 yrs Telecom / Communications · 8 yrs Security · 5 yrs Logistics / Supply Chain · 6 yrs Machine Learning / Big Data · 4 yrs

Languages

English · Intermediate Ukrainian · Native Russian · Native

Certifications

Business Leadership · IAM.Leader

Conferences & industry events

Affiliate World Budapest 2025 · technical specialist, partnerships & infrastructure sourcing Web Summit Lisbon · 2024 & 2025 Capacity Middle East 2025, Dubai · infrastructure & IP supplier sourcing, partnerships

Case studies

Real problems.\nReal solutions built.

Each of these started with a gap — no system, no process, no product. Everything below was built from scratch and handed off to engineering.

01

Cost per GB reduced by 3-4x

Procurement Infrastructure Pricing & FUP

Problem

Infrastructure costs were not tracked systematically. Traffic overuse was caught manually by sysadmins after the billing cycle — no FUP, no throttling, no automated controls. Cost per GB was high and unpredictable.

What I did

  • Analyzed competitor pricing and market trends to build a negotiation position
  • Renegotiated GB-based pricing with existing suppliers using competitive data
  • Moved from ready-made brokered solutions to own infrastructure: separate servers, own networks, own routing
  • Designed 5-stage FUP and throttling system to control traffic overuse automatically
  • Built AI-powered supplier discovery tool to find better deals continuously

Result

3-4x

Cost per GB reduced. Infrastructure became predictable and controllable. Supplier pipeline automated — discovery, qualification, and benchmarking no longer required manual effort.

02

FUP and throttling system built from zero

Product Infrastructure Compliance

Problem

No Fair Usage Policy existed. High-traffic clients consumed bandwidth without limits, affecting neighbors on shared servers. Sysadmins caught abuse manually and applied blunt speed caps — no gradual response, no client notification, no automation.

What I did

  • Analyzed how competitors structure FUP and throttling
  • Designed 5-stage degradation system: bandwidth and concurrent thread limits per client that reduce gradually with usage
  • Built client notification logic for each stage: warnings, alerts, upsell prompts
  • Designed overage system and support goodwill framework for edge cases
  • Specified country-level access control and blackout logic based on abuse patterns and compliance

Result

Manual intervention by sysadmins eliminated for standard cases. Infrastructure load became predictable. 95% of clients operate without hitting FUP. Neighbor isolation on shared servers improved significantly.

03

Scraper API product vision — full spec before any code

Product Research Pricing

Problem

Competitor scraping products existed but nobody on the team had a clear picture of how they worked internally, who the real customers were, what features were must-have vs nice-to-have, or how to price it sustainably. No spec, no plan, no research baseline.

What I did

  • Tested competitor scraper products end-to-end: UX, features, pricing, quality
  • Defined target audience segments and their use cases
  • Designed 6-layer antibot system, JS rendering, SERP, AI extraction, per-domain RPS
  • Built full pricing model: credit-based, tier structure, cost attribution per request type
  • Wrote GTM strategy, 7-phase roadmap, and 8 adjacent side product specs
  • Designed playground for non-technical users with time-to-value under 5 minutes

Result

Complete product vision delivered to CTO — architecture, pricing, GTM, roadmap, and 8 side product specs. Engineering had everything needed to start Phase 1 without a single clarification meeting.

04

Residential proxy architecture designed from zero

Product Infrastructure Research

Problem

No residential proxy product existed. The team wanted to build one but had no understanding of how it worked technically, where IPs come from, how SDK supply works, what the unit economics look like, or how to price it.

What I did

  • Analyzed how leading providers build residential proxy infrastructure
  • Designed SDK supply model: what goes into the SDK, how to handle GDPR consent, battery management, user benefit requirements
  • Specified load balancer logic: geo-routing, ASN-level targeting, GeoIP accuracy requirements, session types and rotation
  • Designed regional network distribution to minimize latency for global clients
  • Built full unit economics: IP acquisition cost, traffic pricing, margin structure
  • Identified niche app categories and partnership targets for SDK distribution

Result

Full architecture spec delivered solo: SDK supply model, load balancer design, geo-routing logic, compliance framework, pricing model. CTO received a complete technical blueprint to begin implementation.

05

AI-powered supplier discovery tool built with Claude Code

AI & automation Procurement

Problem

Finding new IP suppliers and datacenter partners was done manually: search engines, blogs, forum posts, cold outreach. Time-consuming, inconsistent, hard to scale. No structured pipeline for discovery, qualification, or benchmarking.

What I did

  • Built a web application using Claude Code with 10+ data pipelines
  • Integrated scraping, PeeringDB and RIPE parsing, BGP.he analysis, WHOIS lookups
  • Added LinkedIn and web search pipelines for contact discovery
  • Automated contact collection, deduplication, and qualification criteria checks
  • Built internal dashboard for tracking supplier pipeline and outreach status

Result

Manual supplier research eliminated. Pipeline became systematic and scalable. New suppliers identified and qualified automatically. Tool is actively used for ongoing procurement and conference preparation.

How I work

Started in support. Ended up building products. That path matters.

The first years I understood the product from the customer side: what breaks, what confuses people, what they need. That lens stuck, even when the job became infrastructure and procurement.

When I build something I start from the problem, not the solution. For a throttling system or a pricing model, I want to understand the economics and failure modes before writing a spec.

01
Start from what the infrastructure can actually do

Before designing a product or signing a supplier deal, I check whether the infrastructure actually supports it. Routing, classification, GeoIP, cost per GB. Most product problems trace back to assumptions that weren't tested here.

02
Test suppliers against specific product thresholds

A supplier that works for one product tier often doesn't work for another. I test against the actual quality bar, not a generic benchmark, and document gaps before scaling any traffic.

03
Work out unit economics before building

Pricing and cost structure need to be figured out before features. I've seen products that couldn't be priced sustainably because the infrastructure assumptions were wrong from day one.

04
Write specs that don't need a meeting to explain

Coming from support and ops, I know what happens when a requirement is vague. The specs I write cover edge cases and failure modes, not just the happy path.

Looking for

A company with something real to build.

Looking for a proxy, data infrastructure, or IP services company where someone with this background can step in at a senior or leadership level and move things forward.

I've built most of this before. Fewer mistakes, faster ramp-up, less time explaining why something is harder than it looks.

Positions I'm targeting

  • Head of ProductProxy / Data Infrastructure
  • Director of ProductIP / Scraping / Data Products
  • VP of ProductSeries A-B proxy or data company
  • Head of Infrastructure & ProcurementProxy / IP Networks
  • Principal PM or Fractional CPOProxy / Data / Network Infrastructure
  • Product Lead, Data InfrastructureB2B SaaS / Network / API products
  • Head of PartnershipsProxy / IP / Data Infrastructure
  • Senior PM, B2B SaaSTechnical product with infra or procurement complexity