ExtensionEngine
Overall Review Rating
4.7 (5 Ratings)
Overview
It has been developing web and mobile software solutions for some of the world’s most powerful companies since 2000. They try to assure that their clients are informed of what is now possible and put them in a position to take complete advantage of the tools and technologies available. They are always dedicated to helping them achieve that. It is one of the best mobile app development company in Boston.
Services
- Enterprise App Modernization
- Cross Platform Development
- AWS Services
- Ionic App Development
- iOS App Development
- Cross Platform App Development
- DevOps
- Web Development
- ERP Development
- Android App Development
- Content Marketing
- Mobile App Development
Industries Served
ExtensionEngine Reviews
Have a look at these client reviews on previously delivered projects.
Wei Xin Chua
Product Director - Lionhead Digital Pte LtdTechnically strong, commercially fair, and genuinely good to work with
The part of this project I had been most worried about was the integration work. Our system landscape is complex, some of the upstream APIs were barely documented, and one of our third-party vendors was notoriously slow to respond. This team documented what the upstream vendors could not, built resilience into the architecture where third-party reliability was uncertain, and delivered integrations that have worked exactly as specified since day one. I genuinely could not have asked for more.
Project summary
Our actuarial models had outgrown the reporting infrastructure feeding them. Data latency was introducing risk into pricing decisions at a rate the business would no longer accept.
Marcin Lewandowski
Engineering Manager - Kraków Digital Sp zooCustom workflows that match our sales motion exactly. No workarounds needed.
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
Our content delivery infrastructure worked at current scale but showed clear signs it would not survive the enrolment growth our strategic plan assumed.
Beatriz Cavalcanti
Chief Digital Officer - Cerrado Tech SASales visibility we had requested for three years, delivered in fourteen weeks
The platform has been live for six months and is handling three times the transaction volume we scoped for. That is not because we underestimated — it is because the architecture choices made during discovery were genuinely forward-thinking. Most vendors design for exactly what you tell them. This team designed for what you are likely to need. We are already scoping the next phase and there was no question about who we would use.
Project summary
Years of incremental development had left us with a platform that was functional but limiting. A structured rebuild was the agreed path forward.
Maja Söderström
Head of Product Engineering - Scandia Digital ABQA coverage that finally made Friday deployments a professional activity
The knowledge transfer at the end of the project was notably good. Too many vendors see handover as a tick-box exercise. This team ran structured sessions, produced documentation our internal team actually references, and spent real time making sure we understood the architecture decisions well enough to maintain and extend the system independently. Six months later we are doing exactly that without needing to go back to them for every question.
Project summary
Peak season traffic would regularly expose platform instability. Every year we patched. Finally we decided to fix it properly rather than worry about it again twelve months later.
Giulia Conti
Product Manager - Colosseum Digital SrlEvery SEO ranking preserved from the old site. Our search team was very relieved.
We handed them an aggressive deadline, a complex scope, and a client-side team that was stretched and not always available when they needed us. They handled that gracefully. They were precise about what they needed and when they needed it. Where they could proceed independently they did. The delivery landed on time in spite of the constraints we added. I regard that as strong evidence of genuine professional maturity — not just capability.
Project summary
Our property search experience was not matching the quality of the properties we listed. Digital-first buyers noticed, and it was costing us inbound leads.