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Software Reverse Engineering Services

Understand the system nobody documented.

Software reverse engineering services for the system nobody documented and everybody depends on. Legacy code with no source, an undocumented integration, a binary someone left behind when they left the company — we trace it, document it, and hand you a costed choice between maintaining, migrating and replacing it. We work on systems you own or are licensed to analyse, for interoperability, maintenance and migration.

Bello Cloud Solutions — Software Reverse Engineering Services
Fully mapped
Safe path
StackLegacy recoveryProtocol analysisAPK analysisDocs
8+Products live in production
iOS · Android · WebShipped end-to-end
120+Projects built
Design → DeployOne senior crew
What we build

What reverse engineering looks like, up close

A black box, opened up — behaviour mapped, protocols documented, and a clear, low-risk plan to maintain, migrate or replace it.

What you get

Everything reverse engineering takes, handled.

Legacy recovery

Undocumented systems traced and documented.

Protocol analysis

We map how it actually talks.

Binary inspection

Mobile and native binaries — we built APK tooling.

Safe path forward

Maintain, migrate or replace — with a plan, not a rewrite.

In detail

Software Reverse Engineering Services, in plain terms

01

What reverse engineering consulting actually buys you

Not a rewrite quote. Application reverse engineering and code reverse engineering services give you something more useful first: an accurate picture of what the system does, what depends on it, and where the risk sits. As a reverse engineering company we do the software archaeology services nobody else wants to — reading a codebase whose authors are long gone and turning it into something a team can reason about. Security-focused reverse engineering is available where the question is what a system exposes rather than how it works.

02

Legacy recovery, from whatever is left

Legacy system reverse engineering and legacy code analysis when there is source, lost source code recovery when there is not. Undocumented codebase analysis, legacy application audit and legacy system recovery for the platform that has been running unattended for a decade. The output is legacy software documentation your team can actually use, not a diagram that ages out in a month.

03

Binaries, protocols and formats

Binary analysis services for native and mobile artefacts — we have built our own APK-analysis tooling, so binaries do not frighten us. Protocol reverse engineering and network protocol analysis when two systems talk in a language nobody wrote down. API reverse engineering for undocumented API integration and proprietary protocol integration. File format reverse engineering and data format recovery when the only copy of your data is in a format the vendor no longer supports. Firmware analysis services and embedded system reverse engineering where the device is the documentation.

04

Across every platform we build on

Desktop app reverse engineering, web app reverse engineering and mobile app reverse engineering analysis. Hardware protocol integration for the instrument, reader or controller that speaks a serial dialect from 1998 and will outlive us all.

05

Getting your data back out

Legacy database reverse engineering and schema recovery services when the schema is undocumented, the column names are abbreviations nobody can expand, and the business rules live in triggers. This is usually the step that unblocks a migration everyone had written off.

06

Documentation and due diligence

Codebase documentation services, software dependency mapping and system behavior documentation — the artefacts that make reverse engineering for maintenance possible for your own team afterwards. Technical due diligence services for investors and acquirers who need to know what is really inside a codebase before the money moves.

07

A safe way out, not a leap

The point of reverse engineering for migration is to remove the guesswork. Legacy migration planning, legacy modernization consulting and legacy replacement planning based on evidence, with a legacy system risk assessment behind each recommendation. Where a clean break is not possible we build the bridge: compatibility layer development, legacy integration bridge work, legacy system integration and system interoperability consulting so old and new run side by side. Vendor lock-in escape consulting where a supplier holds your data hostage by format. Safe legacy migration services and legacy-to-modern rewrite planning mean you move in stages you can reverse.

08

How the engagement works

Almost always a fixed-scope investigation first — a defined question, a defined budget, a written answer — because open-ended reverse engineering is how budgets disappear. From there you can hire reverse engineering experts for delivery, or keep us as a reverse engineering consultant alongside your team. We take on reverse engineering services USA, UK and EU clients, and we only work on systems you own or are contractually entitled to analyse.

How we approach it

Our way of working

01

Legacy recovery and protocol analysis on undocumented systems.

02

Binary and mobile-app inspection — we've built APK-analysis tooling.

03

Interoperability work so old and new systems talk.

04

Documentation that turns a black box into something maintainable.

Everything we cover

Software Reverse Engineering Services — the full list

The whole practice, in one place. If what you need is on this list, we have shipped it before — and if it is not, ask anyway, and we will tell you honestly whether it is ours to take.

Core services

  • software reverse engineering services
  • reverse engineering company
  • reverse engineering consulting
  • application reverse engineering
  • code reverse engineering services
  • software archaeology services
  • security-focused reverse engineering

Legacy recovery

  • legacy system reverse engineering
  • legacy code analysis
  • legacy system recovery
  • legacy software documentation
  • undocumented codebase analysis
  • lost source code recovery
  • legacy application audit

Binaries and protocols

  • binary analysis services
  • protocol reverse engineering
  • network protocol analysis
  • API reverse engineering
  • undocumented API integration
  • proprietary protocol integration
  • file format reverse engineering
  • data format recovery
  • firmware analysis services
  • embedded system reverse engineering

By platform

  • desktop app reverse engineering
  • web app reverse engineering
  • mobile app reverse engineering analysis
  • hardware protocol integration

Data and schemas

  • legacy database reverse engineering
  • schema recovery services

Documentation and due diligence

  • codebase documentation services
  • software dependency mapping
  • system behavior documentation
  • technical due diligence services
  • reverse engineering for maintenance

Planning a safe way out

  • legacy migration planning
  • legacy modernization consulting
  • legacy system integration
  • system interoperability consulting
  • reverse engineering for migration
  • compatibility layer development
  • legacy integration bridge
  • vendor lock-in escape consulting
  • legacy replacement planning
  • safe legacy migration services
  • legacy system risk assessment
  • legacy-to-modern rewrite planning

Ways to work with us

  • hire reverse engineering experts
  • reverse engineering consultant
  • reverse engineering services USA
Selected work

What we've shipped

See all projects →

We're publishing work in this area — meanwhile, tell us what you need and we'll walk you through relevant examples on a call.

Good questions

Software Reverse Engineering Services FAQs

Is reverse engineering legal?

For systems you own, and for interoperability, maintenance and security purposes, it is routine and lawful in most jurisdictions. We ask for confirmation that you own the system or are licensed to analyse it before starting, and we decline work aimed at circumventing licensing or copying someone else's product.

We have lost the source code. Can it be recovered?

The original source, rarely. A working, documented equivalent, usually yes — through binary analysis and behavioural tracing. For most clients that is the real goal anyway: something maintainable, not the exact original file.

How do you scope work this uncertain?

In stages. The first is a fixed-fee investigation that answers a specific question and tells you what the next stage is worth. You get a decision point with real information at the end of each one rather than an open meter.

Can you integrate with an API that has no documentation?

Yes — that is one of our most common jobs. We observe the traffic, map the protocol, document the endpoints and build you a client with the edge cases and failure modes written down.

Should we rewrite the legacy system?

Often not, or at least not all at once. Rewrites overrun because the old system's undocumented behaviour is the requirement nobody captured. We map it first, then recommend maintain, bridge or replace — with the cost of each.

Do you sign NDAs?

Always, before anything is shared. This work involves your most sensitive systems and we treat it that way.

Related

Often needed alongside this

Ready to start?

Need reverse engineering?

Tell us what you're trying to ship. We'll come back with an honest, costed plan — no jargon.

Book a call