— 01
Client portal: orders, documents, history, support
Client Portals
and CRM Systems
Built for You.
I'll build a convenient management panel, client portal, or CRM tailored to your processes. We'll automate work with clients, partners, or employees — and bring everything into one place instead of scattered spreadsheets and chats.
Built for your processes
Roles
Permissions
Automation
Data
Readiness
6 – 12
Format
Full cycle
01 — Who it's for
Who needs CRM or client portal development?
— 02
CRM for managing deals, client base, and sales pipeline
— 03
Partner portal: dealer, agent, or distributor account
— 04
Internal system for staff: tasks, requests, approvals
— 05
Admin panel with analytics, reports, and content management
— 06
Replacing scattered spreadsheets and chats with a unified digital system
02 — What's included
Full management system development cycle
roles · flows · data · integrations
I design the logic, build the backend, and create an interface that's actually pleasant to use
CRMs and client portals aren't just tables in a browser. They're systems with roles, permissions, notifications, activity history, and integrations. I handle it all: from the data model to the last UI screen.
Laravel / PHP
React / Next.js
TypeScript
PostgreSQL
REST API
Docker / CI/CD
01
Roles and access control design
'We'll add permissions later' — the most expensive mistake
An 'everyone sees everything' access model saves a day upfront and costs weeks of refactoring when a second user type appears. If the system has even two roles, they need to be built into the architecture from day one — otherwise every new access requirement breaks existing logic.
What needs to be decided before writing code
How many roles are in the system and how they relate to each other. What each role can view, create, edit, and delete. Whether there are dynamic permissions — e.g., a manager sees only their own clients. Whether there's a hierarchy: super-admin → admin → manager → client. How permissions change over time.
How I handle this
I design the role and permission model before development begins: I document the access matrix for each role and capture edge cases. I implement RBAC with the principle of least privilege — each role gets exactly what it needs for its tasks. Dynamic permissions (e.g., 'only own records') are extracted into policies, not scattered across controllers.
02
Business logic and workflow development
The process in your head and the process in code are different things
'Client submits a request — manager processes it' sounds simple. But behind it are dozens of questions: what if the manager is unavailable? What if the client withdraws the request midway? What notifications are sent and to whom? Who can change the status and in which direction? Without explicit design, these details become surprise tasks during development.
Logic scattered across the code
When business rules live simultaneously in controllers, models, events, and queues without a clear structure — changing one rule requires edits in five places. This is the standard source of bugs when the system evolves.
How I handle this
I design workflows explicitly: I describe object states (request, deal, task), allowed transitions and triggers. I implement via a state machine or explicit services with a clear contract. Business rules live in one place — easy to find, change, and test.
03
Interface built for work, not for presentations
A beautiful dashboard that's unpleasant to use
Corporate systems often fail not on features but on usability: employees keep their spreadsheets in Excel because the system 'feels clunky'. An interface that takes three clicks where one would do, or hides the needed function on the fifth tab — that's not a tool, it's an obligation.
Complex data that needs to be read quickly
A list of 500 requests, filtering by ten parameters, nested details — all of this requires a well-designed UI: virtual scroll, smart pagination, inline editing, quick actions without navigating to a separate page. Without this, the system works but working in it is a pain.
How I handle this
I design the interface from the user's task, not the data structure. The most frequent actions — one tap away. Tables with filtering, sorting, and export. Forms with real-time validation. Notifications and statuses where they're needed, not in a separate section.
04
Notifications and automated triggers
'The system didn't say' — a problem that's easy to solve upfront
The manager missed a new request because they hadn't opened the system. The client doesn't know their order has changed. The manager doesn't know a task is overdue. All of these situations are solved with notifications — if designed correctly.
Too many notifications is also a problem
A system that sends an email for every action quickly becomes spam. Users unsubscribe or ignore it — and miss truly important messages. The right balance: the right notification, to the right person, at the right moment.
How I handle this
I design a notification matrix: event → recipient → channel (email, Telegram, in-app, SMS). I implement via queues so notifications don't slow down the main request. I configure user subscription settings — each user chooses what they want to be notified about and how.
05
Search, filtering, and handling large data volumes
A million-record database — and everything starts lagging
A client list of a thousand records is fast. A list of a hundred thousand with filters on ten fields — not so much, if it wasn't designed for that. A 'search by name' without indexes becomes a full table scan.
An export that times out
'Export everything to Excel' is a typical task in corporate systems. Without background execution and progressive generation, it either waits three minutes or times out. Both are unacceptable in a working system.
How I handle this
I design indexes for real filter queries — before the first deploy. For complex search I use PostgreSQL full-text search or integrate Meilisearch. Heavy exports go into background jobs with a completion notification — the user doesn't wait, the system doesn't crash.
06
External service integrations
A CRM without integrations is an island
A system where data is entered manually from five other places doesn't automate the process — it duplicates it. The value of an internal system multiplies when it exchanges data with what's already in use: telephony, messengers, payment systems, accounting software, logistics.
An integration that breaks on the first partner change
Direct HTTP calls without a wrapper, hardcoded formats, missing error handling — the standard recipe for a fragile integration. When the partner changes an API version or response format, the system silently breaks.
How I handle this
I wrap each integration in an adapter with retry logic, timeouts, and logging. A partner's data format change is updated in one place, not throughout the code. For critical integrations — circuit breaker: when errors accumulate, the system degrades gracefully rather than crashing entirely.
07
Activity history and audit log
'Who did this?' — a question that always gets asked
The client says they didn't change the order status. The manager insists they sent the notification. A record in the database has changed — by whom and when is unclear. Without audit, this can't be resolved: no data, no answer.
A log that nobody reads
An unstructured log of a million 'something happened' entries is useless. The activity history needs to be readable: who, what, when, on which object, what was the state before and after. It's a tool, not an archive.
How I handle this
I implement a structured activity log: every significant action is recorded with an event type, user, timestamp, and a diff of changes. In the UI — a readable activity feed with filtering. For sensitive objects — a full snapshot of state before and after each change.
08
In-system analytics and reporting
Decisions based on data that's not in the system
If the manager wants to know how many requests came in this week and how many were closed — they go to Excel. If the director wants to see the pipeline conversion — they make a manual export. This is a symptom that the system collects data but doesn't help you work with it.
Complex analytics you don't have to build from scratch
Most internal systems don't need a full-fledged BI tool. A few key dashboards are enough: pipeline, trends over time, top-N by a relevant parameter, summary metrics. This is built at the SQL and good UI level without complex analytics infrastructure.
How I handle this
During the design phase I identify which decisions are made based on system data, and build dashboards for specific tasks. Reports are implemented via optimized aggregate queries with caching. Export to Excel and CSV — for those who prefer working in spreadsheets.
03 — How we work
Four stages — from requirements to a working system
Understand the processes
I learn who works in the system, what tasks they perform, what data they need, and how it currently flows between people and tools. This is the foundation for the data model and system logic.
Design the logic
I describe roles, access rights, key objects and their states, workflows, notifications, and integrations. Confirmed before development — it's cheaper to change here than in code.
Build the system
I build the backend, frontend, and integrations iteratively. Every 1 – 2 weeks I show a working version — you test it against real tasks and give feedback before the next step.
Launch and onboard
We deploy to the server, test key scenarios, set up monitoring. If needed — a short onboarding session for staff.
04 — Result
What you get after CRM system development
Not just a tool, but a
system built for your processes
You get a working system that reflects your actual business process, not one that forces you to adapt to someone else's logic. Data in one place, actions under control, the team works in the system — not around it.
A system people actually use
The interface is designed around tasks, not around the database structure.
Processes under control
Roles, permissions, activity history, and notifications — all in place from day one.
A foundation for growth
Architecture that allows adding new roles, modules, and integrations without rewriting existing logic.
Where to start
Show me the process — we'll design a system around it
No need to prepare a technical specification. Just describe how the process works now, who's involved, and what you'd like to improve. After the first conversation I can propose a system structure and estimate the scope. The scope is fixed before development starts.
I usually respond within an hour
first call is free
working together
online
<1 day
response time
1:1
direct, no middlemen
0 ₽
for the first call
Quick replies
within the day
Single developer
full context, always
05 — FAQ
Common questions about CRM and client portal development
How is a custom system better than an off-the-shelf CRM?
Off-the-shelf CRMs (Bitrix24, amoCRM, HubSpot) work well for standard sales scenarios. A custom system makes sense when you have a non-standard process, specific roles, or integrations that boxed solutions don't support. Or when you're paying more for the ready-made system than your own would cost — and it still doesn't do what you need.
How long does development take?
Can new modules be added later?
Do you build a mobile version?
06 — Other services
Related engagement formats
from the services catalog
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