We're building a residential proxy network from scratch — fully owned, no third-party suppliers. We need one exceptional network engineer to build the entire technical foundation.
What you'll build:
- Android background SDK that routes proxy traffic through user devices (bandwidth sharing, consent-based)
- Proxy routing backend — HTTP/HTTPS + SOCKS5, IP pool manager, country targeting, session rotation
- REST API + user system consumed by Android apps and web dashboards
- Cloud infrastructure (AWS/GCP), CI/CD, monitoring
You need:
- Deep experience with proxy protocols (HTTP, SOCKS5, TCP/IP)
- Android foreground services and background networking
- Backend in Go, Python, or Node.js
- Experience building systems that handle high-concurrency network traffic
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473
21 days2272 USD21 days2272 USDBuilding a proprietary residential proxy network from scratch requires solid coordination between the Android SDK client and the proxy routing backend. The main challenge is maintaining reliable TCP/UDP tunnels from the Android background service while handling session rotation and country targeting on the Go backend with minimal latency.
I will build the routing backend in Go to handle high-concurrency SOCKS5/HTTP traffic, utilizing an in-memory IP pool manager. For the Android SDK, we'll run a lightweight foreground service tunneling traffic back to the router. To give you an idea, something like this handles the bi-directional pipe in Go:
func tunnel(src, dst net.Conn) {
go io.Copy(dst, src)
io.Copy(src, dst)
}
I have built custom proxy gateways and network tunneling SDKs in Go and Kotlin. I can start tomorrow after you share the initial cloud environment requirements.
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561Work example:
7 days2000 USD7 days2000 USDHello!
My name is Evgeny, and I have been professionally developing mobile applications, websites, web services, and web applications for 7 years.
*The cost I indicated is for 1 hour of work. To provide a more detailed price, I would like to get in touch/call and discuss the details.
- You can review my portfolio, feedback, and awards in my profile.
Why should you choose me?
… - I have taken 1st and 2nd places in international championships and competitions in the IT field.
- I have verified video testimonials and letters of appreciation.
- I am always available, honest, and reasonable.
- I work under a contract.
- I lead my own development team.
I would be happy to talk to you in more detail about the project.
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21 days14 000 USD21 days14 000 USD
Hello,
This is a serious infrastructure project, not just a standard backend task, and I’m interested in taking it on.
I have solid experience with backend architecture, high-load systems, networking, APIs, cloud infrastructure, and production deployment. What matters here is not only building the proxy backend, but designing the whole system correctly from the start: routing, session management, scalability, reliability, Android background connectivity, and operational monitoring.
My approach:
first review the architecture and technical requirements in detail
identify the best implementation strategy for the Android SDK, proxy layer, API, and infrastructure
split delivery into clear milestones to reduce risk and keep development transparent
Preliminary estimate:
… MVP implementation: $9,000-$14,000
timeline: 2-3 weeks
I prefer to give the final estimate after reviewing the technical details, because projects like this depend heavily on traffic model, concurrency, routing logic, Android constraints, and infrastructure expectations.
If needed, I can start with the architecture phase and provide:
- technical breakdown
- implementation roadmap
- refined timeline
- final fixed estimate
I’m available to discuss the details and can start with the discovery phase immediately.
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7 days2000 USD7 days2000 USD
Hello, I have worked on a proxy system for web scraping with IP rotation and handling 50,000+ requests/hour - similar to your network with country targeting and session management.
What protocols do you plan to use for session rotation - a proprietary algorithm or standard load balancing methods?
I suggest we connect; I will provide you with free technical advice and we can outline a development plan + I will tell you about my team!
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15 days2000 USD
2116 20 0 15 days2000 USDHi. I read the brief: a fully owned residential proxy network with an Android background SDK that shares device bandwidth with consent, a proxy routing backend over HTTP/HTTPS and SOCKS5 with an IP pool manager, country targeting and session rotation, a REST API and user system on top, and cloud infrastructure with CI/CD and monitoring.
My core strength is the backend and infrastructure side, which is the heart of this system. I would build the proxy routing backend and IP pool manager so each request is routed through a healthy exit device with country targeting and rotating sessions, the REST API and account layer that the Android apps and dashboards consume, and the cloud setup on AWS or GCP with CI/CD and monitoring on pool health, concurrency and uptime. I have strong experience with high-concurrency async backends, REST APIs and cloud infrastructure in production, I work in Python and have shipped Go.
On the Android background SDK that routes traffic through user devices: that is a specialized piece and I would treat it as its own scoped track rather than promising it bundled with everything else, so we agree on how it integrates with the routing backend up front. The server-side protocol work over HTTP, SOCKS5 and TCP session handling I am comfortable owning.
To understand scope: do you want one person to own the full stack including the Android SDK, or is it acceptable to stage it as backend and routing first, then the device SDK, and is the consent and bandwidth-sharing flow already defined on the legal side? Ready to start on the routing backend and API architecture.
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7 days1120 USD
280 7 days1120 USDHello, how are you doing today?
I am very interested in your post.
I have extensive experience in this field, so I can confidently provide an answer.
I look forward to your reply.
Thank you
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31 days1300 USD
702 1 0 31 days1300 USDHello! I have experience working with http, socks5, and Android applications. I am ready to collaborate. I offer quality and fast work. Write to me)
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14 days2272 USD
2993 12 0 4 14 days2272 USDBuilding a proprietary residential proxy network requires a rock-solid Android SDK that forwards TCP traffic under OS battery-saver limits, paired with a Go/Python routing backend for HTTP/SOCKS5. I understand you need custom IP pool management, session rotation, and country targeting built fully in-house.
I have engineered similar low-level networking systems, including background Android services and high-concurrency Go proxy gateways. I will build the backend with Go's net package for throughput, managing the pool in Redis. To give you an idea of how we can handle SOCKS5 traffic routing in Go, here is a rough sketch:
func forward(client net.Conn, targetAddr string) {
target, _ := net.Dial("tcp", targetAddr)
go io.Copy(target, client)
io.Copy(client, target)
}
I can set up the SOCKS5 server skeleton and the Android service shell within four days. Share the cloud preferences (AWS/GCP) to start on the terraform files.
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15 days2000 USD
573 9 0 15 days2000 USDWrite in private messages, I can complete your task of launching proxy infrastructure. I have experience.
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30 days2500 USD
738 4 0 30 days2500 USDHi, i can build it. I have a very good expirience in Go lang and proxy systems. Contact me.
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120 days25 000 USD
196 120 days25 000 USDI can take this as an architecture plus implementation project. For the full technical foundation I would estimate from 60,000 USD and around 120 days, after we confirm compliance rules, expected traffic volume, and the first Android app integration.
WE would start with architecture, protocol design, abuse prevention, consent tracking, SDK lifecycle, routing core, pool management, observability, and then move into staged implemntation. I would not build a gray proxy farm - for this type of product the legal and technical safety layer is part of the system, not decoration =/
Two points I need clarified inside this project thread
> Expected first scale - devices online, concurrent sessions, target countries
> Traffic policy - allowed use cases, blocked categories, KYC or customer verification requirements
Relevant Ingello cases
… > https://business.ingello.com/vorfahr - SaaS automation with backend logic, user flows, and scalable operational architecture
> https://business.ingello.com/fractal - complex automation architecture where reliability and controlled execution matter
> https://business.ingello.com/platforma - corporate platform experience with roles, dashboards, and internal management logic
Main FLH landing
> https://systems-fl.ingello.com
In short - this is not a simple script task. It needs architecture first, then disciplined delivery. Measure twice, cut once - boring wisdom, but it saves money here.
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