Proxy Network Engineer

SearchApi

United States

Remote

CAD 120,000 - 180,000

Full time

14 days+

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Benefits offered by this job

Fully Remote

Equity share

Profit sharing

Greenfield project

Annual team retreats

Job summary

SearchApi is seeking an engineer to build proxy infrastructure from the ground up, not just configure existing solutions. You will own the core systems, manage IP rotation, and optimize routing for scale. This is a greenfield role with emphasis on performance and reliability.

You will work on residential, mobile, datacenter, and ISP proxy types, handle geo-targeting, and develop bandwidth metering while maintaining high throughput and low latency across IPv4/IPv6 pools.

Qualifications

Built proxy or networking infrastructure from scratch, not just used existing tools.
Deep understanding of HTTP/HTTPS/SOCKS5 protocols and low-level networking.
Experience with high-throughput, low-latency systems and routing.

Responsibilities

Build proxy infrastructure from scratch and design core systems.
Implement IP rotation, session management, and intelligent routing.
Manage IP reputation, health, and pools across the fleet.

Skills

Deep networking

Proxy infra design

IP rotation

Performance tuning

Linux networking

Education

BSc in CS or equivalent

Tools

Terraform

iptables

tcpdump

DNS tooling

Job description

We are looking for an engineer who can build proxy infrastructure from scratch. Not configure existing solutions. Build. Residential networks, ISP proxies, rotation systems, session management. If you understand the difference between a high-level integration and writing a reverse proxy yourself, this role is for you.

About SearchApi

SearchApi is a real-time SERP API delivering structured data from 100+ search engines and sources, including Google Search, Google Shopping, Google Jobs, Bing, Baidu, YouTube, Amazon, and many more. We power production workloads for Fortune 500 companies and fast-moving startups who need reliable search data at scale.

We're a lean, profitable, bootstrapped team. No VC pressure, no bloat. Just engineers shipping real products to real customers.

Why Join Us

Build from scratch. Not glue existing tools together. Design and implement proxy infrastructure.
Greenfield project. You'll shape the architecture from day one. No legacy to work around.
Deep technical work. Networking, protocols, performance optimization. The hard stuff.
Real scale. Billions of requests. Your infrastructure needs to handle it.
Bootstrapped and Profitable. We answer to customers, not investors.

We are searching for someone who can build high-quality proxy infrastructure. We use existing solutions today. We want someone who understands their limitations and can build something better.

Tech Stack

Low-level networking (TCP/UDP, sockets, connection handling)
HTTP/HTTPS/SOCKS5 protocols
HTTP/2, HTTP/3
Reverse proxy implementation (not just nginx/squid configuration)
Linux networking stack
Cloud infrastructure (provider TBD based on IP policies and networking speed)
Terraform is a plus (for autoprovisioning)

We use Cursor, Claude, ChatGPT, GitHub, and Slack daily.

You Control AI, AI Doesn't Control You

We ship faster because we use AI tools aggressively. Cursor and Claude. But you own the output. If you can't evaluate what AI produces, you're not ready for this role.

What You'll Do

Build proxy infrastructure from scratch. Not integrate existing solutions. Write the core systems yourself.
Design and implement rotation systems. IP rotation, session management, sticky sessions, intelligent routing.
Manage IP reputation and quality. Monitor, track, score, and optimize IP health across pools.
Build bandwidth reporting and metering. Track usage, report stats.
Write reverse proxy systems. High-performance, optimized for our use case. Not just configure squid or nginx.
Handle multiple proxy types. Residential, mobile, datacenter, ISP. Understand the differences, characteristics, and when to use each.
Implement geo-targeting. Country, city, ASN level targeting.
Optimize for performance. Every millisecond matters. Every connection matters.
Work with networking fundamentals. Routing, DNS, TCP/UDP tuning, connection pooling, concurrent connection limits.
Support multiple protocols. SOCKS5, HTTP, HTTPS. Different session types and authentication methods.
Understand HTTP/2 and HTTP/3 differences. And how they affect proxy behavior.
Build monitoring and health checks. Track proxy pool health, failover, redundancy.
Handle IPv4 and IPv6. Understand the differences and implications.

You define the architecture. We have requirements, not a blueprint. You'll decide how to build it.

The Hard Parts

This role is not for everyone. Here's what makes it hard:

No existing codebase. You're building from zero. No one to ask how it was done before.
Performance is everything. Slow proxies are useless proxies. You'll obsess over latency and throughput.
Complexity at scale. Managing thousands of IPs, tracking reputation, handling failures gracefully.
Deep debugging. When something breaks at the network level, you need to figure it out. Packet captures, connection traces, protocol analysis.
Understanding trade-offs. We use existing solutions now. You should understand what they do well, where they fall short, and what could be done better.

If you prefer working with existing tools and frameworks without understanding what's underneath, this isn't for you.

About You

Deep networking knowledge. TCP/UDP, sockets, connection handling, routing. Not surface-level.
Protocol expertise. HTTP, HTTPS, SOCKS5. You understand them at the byte level.
Can write a reverse proxy from scratch. Not just configure squid or nginx. Write the proxy.
Performance obsessed. You profile, measure, and optimize. You know where the bottlenecks are.
Understand proxy types. Residential, mobile, datacenter, ISP. Their characteristics, use cases, and limitations.
Experience with IP reputation. How it works, how to manage it, how to recover from blacklisting.
Geo-targeting knowledge. Country, city, ASN level. How it works, accuracy limitations.
Linux networking. iptables, routing tables, network namespaces. Comfortable at this level.
Self-directed. You don't need someone to tell you what to build next.
Great writer. Documentation, architecture decisions, protocol specs. Clear communication matters.
Fluent in English, written and spoken.
BSc or higher in CS or equivalent technical field.

Required Experience

Built proxy or networking infrastructure before (not just used it).
Deep understanding of HTTP/HTTPS/SOCKS5 protocols.
Experience with high-throughput, low-latency systems.
TCP/UDP programming at socket level.

We're especially looking for

Experience building residential or ISP proxy networks.
Understanding of ISP relationships and mobile carrier specifics.
IP rotation and session management systems.
IP quality scoring and reputation management.
Geo-targeting implementation (country, city, ASN).
Multi-tenancy and customer isolation.
HTTP/2 and HTTP/3 proxy experience.
Terraform for infrastructure provisioning.
Experience at massive scale.

What We Look For

Tell us about proxy or networking infrastructure you've built. Not configured. Built. What were the requirements? What did you design? What performance did you achieve? What are the limitations of existing solutions you've worked with? We want specifics.

Signals we look for

Networking projects you've built. Low-level systems experience. Technical blog posts about protocols or networking. Open-source contributions to proxy or networking tools. Evidence you understand this domain deeply.

Hiring Process

45-minute interview call. Discuss your experience with proxy and networking systems.
Technical deep-dive. Architecture discussion, protocol knowledge, design questions.
Take-home challenge. Realistic networking problem.
Meet the team. 30 minutes.
Reference check + Offer.

What You Get