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Overall Review Rating

4.4 (6 Ratings)

Quality 4.4/5
Schedule 4.2/5
Cost 4.4/5
Communication 4.4/5

Overview

Sierra Experts team is passionate about what they do here. They love technology, design, and development. Their skills allow them to make compelling experiences that your business and customers deserve. Because they are smaller, theirpassion and agility means your product or business will never suffer. They take your business to the next level of extension with their enterprise solutions that add power to your industry and increase operational efficiency and potency.

founded
Founded 2003
employees
Employees 10 - 49
hourly rates
Hourly Rates N/A
our rating
Our Rating 4.4/5
contact
Contact +14127220707

Services

  • Logo Designing
  • Ruby on Rails
  • ICO consulting Blockchain Implementation
  • Web Development
  • Game Development
  • Private Blockchains
  • Advertising, Media
  • iOS App Development
  • Android App Development
  • Cross Platform Development
  • Mobile App Development
  • MVP Development

Industries Served

Healthcare Human Resources Logistics & Supply Chain Media & Entertainment Nonprofit & NGO

Sierra Experts Reviews

Have a look at these client reviews on previously delivered projects.

Samantha Doyle

Product Manager - Reef Digital Pty Ltd
Posted on Jun 25, 2025
4.5 Overall Rating

Support response times that exceed what we achieved with an internal team

What set this team apart in practice was their engineering judgment — specifically, their willingness to tell us when our requirements were wrong and explain what to do instead. Not every vendor does that. The consultative element elevated the final output well beyond what our original brief described. We ended up with something better than what we had asked for, which is not a sentence I expected to be writing in a review.

Project summary

Our internal team was committed to maintenance and could not absorb a new build of this complexity. An external partner was the only way to hit the timeline.

Quality 4.5/5
Schedule 4.0/5
Cost 4.0/5
Communication 5.0/5
project type
Project Type IT Managed Services
industry
Industry Nonprofit & NGO
project cost
Project Cost Less than $10,000
Read Full Review

Matthieu Renard

Directeur Technique - Lumière Technologies SAS
Posted on Apr 30, 2025
4.5 Overall Rating

Complex project, zero drama. That is how you know the project management is real.

We received proposals from six vendors. Four of them quoted us prices that bore no relationship to the actual scope. This team came back with something realistic and then delivered against it exactly. I have worked on enough technology projects to know that the gap between what is proposed and what is delivered is where trust gets destroyed. There was no gap here. What was promised is what we got, and the ongoing relationship we have built from this is something we intend to continue.

Project summary

A new care pathway required patient data to move between systems in a way our current architecture did not support. The integration complexity was beyond what we could handle in-house.

Quality 5.0/5
Schedule 4.0/5
Cost 4.5/5
Communication 4.5/5
project type
Project Type Embedded Systems Development
industry
Industry Healthcare
project cost
Project Cost $10,000 to $49,999
Read Full Review

Charlotte Nevill

Head of Product - Croydon Digital Agency Ltd
Posted on Nov 14, 2024
4.5 Overall Rating

Technically strong, commercially fair, and genuinely good to work with

Looking back, what strikes me most is how little drama there was. Real technology projects have problems. This one had them too — but every problem was flagged before it became a crisis, every scope change was handled through a proper process, and every risk was managed rather than buried. Our project manager said it was the smoothest vendor engagement he had been involved in. Given how complex the technical requirements were, I think that reflects genuine delivery maturity.

Project summary

Warehouse management errors were accumulating at a rate our clients could see. A proper WMS was the agreed fix — we needed a development partner who had built one before.

Quality 4.5/5
Schedule 4.0/5
Cost 4.5/5
Communication 4.5/5
project type
Project Type Low-Code / No-Code Development
industry
Industry Logistics & Supply Chain
project cost
Project Cost $10,000 to $49,999
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Tobias Lindemann

Leiter Digitalisierung - Lindemann Industrie GmbH
Posted on Aug 05, 2024
4.5 Overall Rating

Infrastructure spend down by a third. Same performance, better architecture.

Our stakeholder group was unusually broad — board sponsors, operational users, compliance leads, and an IT team with strong opinions. I have watched vendors handle that kind of environment badly. This team adjusted how they communicated depending on who they were talking to, managed expectations honestly when things shifted, and delivered something that each group considers a success. Getting everyone to agree on that outcome was not straightforward and they deserve credit for making it happen.

Project summary

A failed engagement the previous year had made us more rigorous about vendor selection. We took the time to find a partner we actually trusted before we committed.

Quality 4.0/5
Schedule 4.5/5
Cost 5.0/5
Communication 4.5/5
project type
Project Type Cloud Services
industry
Industry Nonprofit & NGO
project cost
Project Cost $500,000+
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Siobhan Gallagher

Chief Technology Officer - Northumbria FinTech Ltd
Posted on Nov 11, 2023
4.5 Overall Rating

Delivered what the proposal described. More rare than it should be.

I have been through several technology implementations in my career. The pattern I am used to is: detailed proposal, optimistic timeline, scope creep, overrun, excuses at the end. This engagement broke that pattern at every stage. The timeline was realistic from the start. Changes were managed through process. The final delivery matched what was agreed. Simple, but uncommon.

Project summary

The business case had been approved but the internal resource to execute it had not materialised. External delivery was the pragmatic solution.

Quality 4.5/5
Schedule 4.0/5
Cost 4.5/5
Communication 4.5/5
project type
Project Type POS System Development
industry
Industry Human Resources
project cost
Project Cost Less than $10,000
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