RAG implementationservices for the product and data you already have, without breaking what works.

Your product is live and your knowledge sits in a wiki, a ticketing system, a shared drive and a database. We connect those sources, choose a retrieval architecture that fits them, build the pipeline and release it behind a feature flag, so current users do not see it until the answers are good enough to show.
Discuss your RAG implementation

The model is the easy part. Your existing systems are the project.

Retrieval-augmented generation looks simple on a diagram: find the relevant text, hand it to a language model, return the answer. In a live product most of the work sits before the model. Documents have to be pulled from systems that were never built to be searched together, split without losing their meaning, kept in sync as they change and filtered by who is allowed to read them. That is what an implementation consists of, and it is where most of the effort goes.

What goes wrong when RAG is added to a live product

01

Each source needs its own handling

Wiki pages, PDFs, tickets and database rows differ in structure. One generic loader turns tables, headings and attachments into noise the retriever cannot use.
02

Permissions are lost on the way to the index

The source system knows who can open a document. The index does not, unless access rules travel with every chunk. Without them, an answer can quote a file the user was never allowed to see.
03

The index goes stale

A one-time import works for the demo. A month later the assistant quotes a policy that was replaced, or a page that was deleted in the source.
04

Vector search alone misses exact terms

Embeddings match meaning well, but they are often weak on exact product codes, error numbers and names. Users often search for exactly those, and get nothing useful.
05

Nobody can tell whether a change helped

A new chunk size or prompt fixes one question and breaks three others. Without a fixed test set, tuning is guesswork and every release is a risk.
06

Speed and cost show up only at launch

Retrieval, reranking and a long prompt add latency and token spend to every request. If nobody measured them on real traffic, the feature gets switched off.

Four decisions that shape a RAG architecture

We make each of these with you, in writing, before the build starts. They decide most of the cost and most of the answer quality.

What gets indexed

  • Which sources are in scope first, and which wait
  • How each document type is parsed and split
  • What metadata is kept: owner, date, product, version

How it is retrieved

  • Keyword, vector or hybrid search
  • Metadata filters and reranking where they pay off
  • Query rewriting for short or vague questions

Who can see what

  • Access rules copied from the source systems
  • Filtering before any text reaches the model
  • Tenant separation for multi-customer products

What it costs to run

  • Model choice per step, not one model for everything
  • Latency budget for each stage of the request
  • Caching and context size kept under control

Signs you need help with a RAG implementation

If a few of these describe your situation, the missing piece is often engineering around the model, not a different model.

1

The prototype works on a folder of files

It answers well from twenty hand-picked documents and has never been connected to the real systems.

2

Security blocked the launch

Nobody could explain how the assistant respects document permissions or where the data is sent.

3

Your engineers are busy with the core product

They could build the pipeline, but not this quarter and not alongside the roadmap.

4

Answers are right in testing, wrong in use

Real questions are shorter, vaguer and full of internal terms the test questions never had.

5

You are unsure which architecture fits

Hybrid search, reranking, query rewriting, agents: every article recommends something else, and each adds cost.

6

Search in the product is already a complaint

Users cannot find what exists, and support answers the same questions from the same documents every day.

What the work consists of

RAG pipeline development and architecture, step by step

Data and system audit

We list your sources, their formats, APIs, update frequency and access rules, and mark which ones are ready to index and which need cleanup first.

RAG architecture design

A written design: retrieval method, index layout, model per step, where each component runs and how it connects to your product. You approve it before we build.

Connectors and ingestion

Connectors to the systems you already use, with incremental sync so edits and deletions in the source reach the index without a full rebuild.

Parsing and chunking

Each document type is split along its own structure: headings, tables, ticket threads, code blocks. Chunks keep their title, source link and date.

Retrieval pipeline

Search, filtering, reranking and prompt assembly as a service with its own API. As a RAG pipeline development company we build it so every stage can be measured and replaced separately.

Permission-aware retrieval

User and group access is synced from the source systems and applied as a filter at search time, so restricted text is not passed to the model.

Evaluation setup

A test set of real questions with expected sources and answers, run on every change. You see retrieval quality and answer quality as numbers, not impressions.

Integration and rollout

The feature goes into your product behind a flag, first for your team, then for a share of users, with logging, cost tracking and a fallback to what you have today.

What you have when we finish

Everything runs in your accounts and is documented so your own engineers can operate and change it.

A working pipeline

Connectors with scheduled or event-based sync

Index and retrieval service in your cloud

API your product calls, with source citations

Deployment scripts and environment setup

A way to measure it

Test set built from your real questions

Baseline results recorded before launch

Checks that run on every pipeline change

Dashboard for latency, cost and failed answers

A handover your team can use

Architecture document with the reasons behind each choice

Runbook for re-indexing and adding a source

Walkthrough sessions with your engineers

List of next improvements, ranked by effect

Built around the stack you already run

The pipeline is usually a set of Python services next to your existing backend. The vector store (an extension in the PostgreSQL you already have, or a dedicated vector database), the orchestration library and the model provider are chosen with you for each project, based on your data, hosting rules and budget.

Python
FastAPI
PostgreSQL
AWS
Docker
Kubernetes
TypeScript
Who is this for

For teams with a live product and scattered knowledge

SaaS and product companies

You want answers from customer data inside the product, with strict separation between accounts.

Companies with internal knowledge

Policies, contracts and procedures are spread across tools, and staff lose time looking for them.

Engineering teams with a prototype

The proof of concept convinced everyone. Now it has to meet real data, permissions and traffic.

Support and operations leads

Agents answer from the same help articles and past tickets every day and need them in one search.

Where are you now?

Choosing an architecture

Get a design that fits your sources and budget.

Connecting sources

Build connectors and sync for the systems you use.

Stuck after a prototype

Move from a file folder to real data.

Blocked on permissions

Make retrieval respect existing access rules.

Adding to a live product

Integrate behind a flag with a fallback.

Handing over to your team

Documentation, tests and a runbook.

How a RAG implementation runs

01

Audit

We review sources, access rules and the product code where the feature will live, and collect real user questions for the test set.

02

Architecture and baseline

We write the design and build the simplest version that works on a sample of your data. Its test results become the baseline for every later change.

03

Pipeline build

Connectors, parsing, index, retrieval and permission filters, built source by source. Each addition is checked against the test set.

04

Integration

The retrieval service is connected to your product behind a feature flag, with logging of questions, sources used, latency and cost.

05

Staged rollout

Internal users first, then a share of customers. We fix what real questions reveal before the feature is opened to everyone.

06

Handover

Documentation, runbook and sessions with your engineers. We stay on for further sources and tuning if you want us to.

How we work

Choose how to start

Discovery Sprint

most popular

2-week fixed-price start

Fixed price. Implementation quoted after it.

For teams that need an architecture and a realistic estimate before they commit a budget.

Audit of sources and access rules

Architecture document with options compared

Prototype on a sample of your data

First test set and baseline results

Scope and estimate for the implementation

Start with discovery

Implementation team

Backend and AI engineers working in your repositories

Fixed price for an agreed scope, or monthly.

For teams that know what they want built and need people to build and roll it out.

Connectors and ingestion for your sources

Retrieval pipeline with permission filters

Integration into your web or mobile product

Evaluation checks on every change

Staged rollout and handover to your team

Discuss your implementation

AI products we've built and rescued

Data MANAGEMENT & payroll

AI Payroll Platform (NDA)

Europe

An AI-powered payroll validation platform that extracts data from salary slips, verifies payroll calculations, and automates reporting and approval workflows for HR and finance teams

Before
→
after
↓
Manual payroll validation
↑
17% fewer salary calculation errors
↓
Complex PDF extraction
↑
AI-powered PDF data extraction
↓
Manual approval workflows
↑
Automated payroll validation and reporting workflows
↓
 Limited processing scalability
↑
Scalable platform for payroll processing
AI Commerce PlatformE

QLode

USA
Europe

An AI-powered fashion commerce platform that helps retailers deliver personalized shopping experiences through virtual styling, AI recommendations, image search, and intelligent product discovery.

Before
→
after
↓
AI search didn't scale
↑
AI-based recommendation engine developed
↓
Scalable infrastructure needed
↑
Image & text search implemented
↓
Complex retailer integrations
↑
Multi-retailer integration architecture built
↓
Product discovery wasn't production-ready
↑
High-performance backend for AI-driven flows
AI CONSUMER APPS

AI Mobile Editors

Global
4M+
DOWNLOADS COMBINED
Before
→
after
↓
Existing  codebase required stabilization
↑
Both apps stayed instore
↓
AI features broken or misleading
↑
AI rebuilt to production quality
↓
App Store compliance at risk
↑
App Store compliance restored
↓
Reviews declining fast
↑
Product stabilized 

What clients say about working with Gilzor

Verified reviews from Clutch: the work differs from project to project, the way we run it does not.

“They were incredibly fast and efficient at scoping the project and then delivered within very tight deadlines.”
Clement Nevoret CEO, Pointblank GmbH Mobile app development · $10,000 to $49,999 Verified review on Clutch
“I was impressed with how quickly we got a stable and well-designed product.”
Natalia Burakova Senior Product Manager, Impala Studios Mobile app development and support · $200,000 to $999,999 Verified review on Clutch
“The team met all commitments, aligning with our company's objectives.”
Verified client Individual entrepreneur, IT company Mobile app, API and UX/UI design · $50,000 to $199,999 Verified review on Clutch

The people you will talk to

Art Scherbakov
Art ScherbakovCo-Founder
Andrew Laminsky
Andrew LaminskyCTOLinkedIn
Yuri Rudenya
Yuri RudenyaHead of Mobile Development at GilzorLinkedIn
Alena Timofeeva
Alena TimofeevaProduct Marketing LeadLinkedIn

Make the most of the experienced team

We are a global team of
creative
and
strategic thinkers
who specialize in building custom digital products
from scratch. Our main goal is to
deliver high-quality solutions
that meet our clients' needs.
We are a global team of
creative
and
strategic thinkers
who specialize
in building custom digital products
from scratch. Our main goal is to
deliver high-quality solutions
that
meet our clients' needs.
Learn more
85%
recurring customers
12M
the biggest fundraising round by one startup
X3 MRR
growth of partner's business in 5 mos
2 weeks
for project start
5+ years
av. partnership duration with SMBs and product companies

Why Gilzor

Adding RAG to a live product is mostly backend, data and integration work, with AI on top. That is the kind of engineering we do.

What we bring

AI on real documents

For an AI payroll platform we built PDF data extraction from salary slips with automated validation. Salary calculation errors fell by 17%.

Search experience

For QLode we built image and text search and an AI recommendation engine on a multi-retailer integration architecture.

Product engineers, not only AI

We build web, mobile and backend products, so the feature is integrated into your app, not left as a separate demo.

Launches behind us

70+ products launched for startups, SMBs and product companies.

Clients who return

85% of our clients come back with new work.

What makes us different

Your stack stays

We add to the systems you run and avoid new infrastructure unless the test results call for it.

Simple first

We start with the plainest pipeline and add reranking, rewriting or agents only when the test set shows a gain.

Permissions from the first day

Access rules are part of the design, not a patch after security review.

You own everything

Code, index, prompts and test sets live in your repositories and cloud accounts.

Overlap with US hours

Our team in Europe shares part of the US working day for calls and reviews.

What our clients
frequently ask

What do your RAG implementation services include?

An audit of your data sources and access rules, a written architecture, connectors and ingestion, parsing and chunking, the retrieval pipeline, permission filtering, an evaluation test set, integration into your product and a staged rollout. You can take the whole scope or only the parts your team does not want to build.

Do we need to move our data or change our stack?

No. Documents stay in the systems where they live today, and the pipeline reads them through their APIs or exports. The index is a searchable copy that we keep in sync, hosted in your cloud account. If your database can already store vectors, we check whether that is enough before proposing anything new.

Which RAG architecture do we need?

It depends on your questions and data, so we decide on test results, not on trends. Hybrid search with reranking is often enough for questions answered by one or two documents. Questions that combine several sources, or need live data from an API or database, may call for query decomposition or tool calls. Each extra step adds latency and cost, so we add it only when the numbers improve.

How do you make sure users only get answers from documents they can access?

We sync users, groups and document access from the source systems and store them with each chunk. The filter is applied in the search query, before any text is sent to the model, so the model does not see restricted content. We do not rely on prompt instructions for access control, and we test it with accounts that have different rights.

How does the index stay up to date?

Each connector tracks changes in its source: through webhooks or change feeds where the system offers them, and through scheduled checks where it does not. Edited documents are re-indexed, deleted ones are removed. How fresh the index has to be is agreed per source, because syncing more often costs more.

How do you roll RAG out without breaking the current product?

The retrieval pipeline runs as a separate service, designed so that a fault in it does not take down your core application. The feature is switched on with a flag: first for your team, then for a share of users. Existing search or support flows stay in place as a fallback until the new feature meets the quality bar you set.

Which models and vector databases do you use?

There is no fixed list. We compare options with you against your requirements: where data may be processed, whether models must be self-hosted, expected volume and budget. The pipeline is built so that the embedding model, the language model and the vector store can each be replaced later. Changing the embedding model does mean re-indexing, and we plan for that.

How long does it take and how is it priced?

The main drivers are the number of sources, how clean they are and how complex the permissions are. A 2-week Discovery Sprint at a fixed price gives you the architecture, a prototype on your data and an estimate. The implementation is then a fixed price for an agreed scope or a monthly team. Projects can start in about two weeks.

No sales pitch

Tell us where your data lives

List the systems, the product you want the answers in and what has been tried so far. We'll reply with a suggested architecture direction and a starting point. If plain search would do the job, we'll say so.

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