About Zwiffer Inc
They believe that the best apps come from a vast process, and they pride themselves on their design process. They always work with enthusiasm. They are passionate about the work they do & the outcomes they help to make. They put themselves on their feet, always listen closely to know ideas that differ from their own and share new ideas.
Services
Mobile App Development
Wearable App Development
UI-UX Design
Zwiffer Inc Reviews
Write a ReviewConnected device platform that gave us real-time visibility we never had before
Piotr Wojciechowski / Head of Development - Vistula Software Sp zoo
Verified
Jul 20, 2025
Jul 20, 2025
Project summary: Claims fraud detection had been rule-based for years and we were losing ground to more sophisticated patterns — we needed a machine learning model built on our own historical data.
The thing I appreciate most in retrospect is that they were honest when something was harder than expected. Twice during the project the team came to us proactively to say that a particular component needed more time to do properly and explained why cutting corners would create problems later. We gave them the time. Both decisions were correct. The resulting product is solid and we have had none of the post-launch instability that plagued our last two technology projects.
PROS
Architectural decisions that will serve us for years rather than just solving the immediate problem, knowledge transfer that left our team genuinely capable, no scope creep at all
CONS
Honestly nothing worth documenting — we went in with high expectations and they were met on every measure
Project TypeIoT Development
IndustryInsurance
Project Cost$10,000 to $49,999
DurationOct 2024 – Feb 2026
Questions & Answers
Please describe your company, your role, and the industry you operate in.
As Head of Development at Vistula Software Sp zoo, I manage a cross-functional technology team serving our Insurance clients from Warsaw, Poland. We are a commercially focused organisation and every technology decision we make is evaluated against a clear business case. We needed a partner who understood that context, not just the technical brief.
What specific problem or business challenge led you to hire this company?
Our Insurance regulatory environment had changed and the compliance timeline was non-negotiable. We needed to rebuild specific components of our system to meet the new requirements and our internal team was already fully committed to the core product roadmap. Bringing in a specialist IoT Development partner was the only realistic path.
What services did the company provide for your project?
End-to-end IoT Development delivery with a particular emphasis on the integration layer that connected the new build to our existing Insurance infrastructure. They also provided UI/UX input that was not in the original scope but which they offered proactively because they could see it would affect adoption. That kind of initiative was characteristic of how they approached the whole engagement.
Why did you choose this company over other providers you considered?
Honestly, the quality of the questions they asked during the briefing process set them apart. Most vendors listen to the brief and come back with a solution to exactly what you described. This team came back with a solution to what we actually needed, which turned out to be somewhat different. That kind of consultative instinct is what we were looking for.
How clearly did the company understand your requirements and business goals?
Thorough and precise. They translated our business language into technical requirements without losing the intent, which is a skill that sounds straightforward but frequently goes wrong. Every user story they wrote was reviewed against the original business objective before it entered the sprint and the acceptance criteria were specific enough to remove subjectivity from QA.
How was your overall experience with their communication and project management?
Professional and efficient. We used a shared project management tool that gave our stakeholders visibility without requiring them to attend every meeting. The project manager had a clear escalation path and used it appropriately. The only time I needed to intervene directly was when I chose to, not because something had been missed.
Did the company deliver the project on time and within your expected budget?
Yes on both counts. There was one sprint where a third-party integration took longer than scoped because of undocumented API behaviour on the vendor side. The team flagged it immediately, proposed two mitigation options, and we agreed on an approach that recovered the timeline within two weeks. That is how scope issues should be handled and rarely are.
What tangible results or business impact have you seen since the project was completed?
Hard to isolate precisely because several factors changed simultaneously, but the data we can attribute directly to the new IoT Development platform shows a meaningful improvement in the metrics that matter to our Insurance business. Our account managers report that the new capability is coming up positively in client conversations, which was one of the strategic objectives we started with.
What did you like most about working with this company?
The post-launch behaviour. Some agencies disappear the moment the final invoice is paid. This team maintained the same level of responsiveness during the hypercare period as during development, handed over thorough documentation without being asked twice, and checked in proactively a month after go-live to review performance metrics with us. That last part was entirely unprompted.
Would you recommend this company to others, and would you work with them again?
Yes. The referral I would give comes with context: they are not the cheapest option and they are not the fastest to schedule. If you are optimising purely on price or looking for someone to start tomorrow, there are other choices. If you want the work done properly and a partner you can trust with a complex, high-stakes IoT Development engagement, this team is the answer.
Web development done properly — performant, scalable, and a joy to maintain
Callum Stanton / GM of Technology - Suncoast Retail Group
Verified
Sep 11, 2024
Sep 11, 2024
Project summary: Our editorial team was managing content across seven different tools with no single source of truth — we needed a unified CMS that could handle structured and rich-media content equally well.
I am a demanding client. I have a technical background, I review code, and I have high standards for documentation and testing. This team met all of those expectations without ever seeming defensive about scrutiny. Peer code reviews were welcomed, unit test coverage was genuine rather than performative, and the API documentation was thorough enough that our own developers integrated against it without a single clarification call. That level of craft is what I look for and rarely find.
PROS
Engineering quality that our internal team can maintain without calling the vendor, thorough documentation, proactive risk identification throughout the project
CONS
Time zone difference required some adjustment to our internal communication habits but the team managed the overlap window efficiently and it never affected momentum
Project TypeWeb Development
IndustryMedia & Entertainment
Project CostLess than $10,000
DurationMar 2025 – Apr 2025
Questions & Answers
Please describe your company, your role, and the industry you operate in.
Suncoast Retail Group operates across the Media & Entertainment sector with offices in Brisbane, Australia. In my capacity as GM of Technology I oversee both the strategic and operational technology agenda. We are a growth-stage business that needed a development partner capable of scaling with us rather than constraining us.
What specific problem or business challenge led you to hire this company?
We had a product concept validated by market research but no clear path to build it within our budget and timeline constraints. Our Media & Entertainment competitors were moving quickly and we could not afford to spend eighteen months finding out a generalist agency could not execute the Web Development work our product required.
What services did the company provide for your project?
The full Web Development lifecycle from discovery through to production deployment and hypercare support. This included requirements workshops, solution architecture, sprint-based development, QA and automated testing, deployment to our cloud environment, and a structured handover with documentation. They also provided a brief post-launch period of dedicated support which was genuinely useful.
Why did you choose this company over other providers you considered?
Honestly, the quality of the questions they asked during the briefing process set them apart. Most vendors listen to the brief and come back with a solution to exactly what you described. This team came back with a solution to what we actually needed, which turned out to be somewhat different. That kind of consultative instinct is what we were looking for.
How clearly did the company understand your requirements and business goals?
Thorough and precise. They translated our business language into technical requirements without losing the intent, which is a skill that sounds straightforward but frequently goes wrong. Every user story they wrote was reviewed against the original business objective before it entered the sprint and the acceptance criteria were specific enough to remove subjectivity from QA.
How was your overall experience with their communication and project management?
Professional and efficient. We used a shared project management tool that gave our stakeholders visibility without requiring them to attend every meeting. The project manager had a clear escalation path and used it appropriately. The only time I needed to intervene directly was when I chose to, not because something had been missed.
Did the company deliver the project on time and within your expected budget?
Yes. I will note that the original timeline was aggressive and I had privately expected a slip. They managed to hold it by making smart sequencing decisions early on that I only fully understood in retrospect. The budget discipline was equally good — we received a single change request for scope we had introduced ourselves and it was priced fairly.
What tangible results or business impact have you seen since the project was completed?
The most direct measure is that the problem we hired them to solve no longer exists. Beyond that, the new Web Development platform has reduced our operational overhead measurably, our team spends less time managing incidents and more time on product development, and we have been able to onboard two new enterprise clients who had previously cited our technical limitations as a barrier.
What did you like most about working with this company?
The post-launch behaviour. Some agencies disappear the moment the final invoice is paid. This team maintained the same level of responsiveness during the hypercare period as during development, handed over thorough documentation without being asked twice, and checked in proactively a month after go-live to review performance metrics with us. That last part was entirely unprompted.
Would you recommend this company to others, and would you work with them again?
Unreservedly. We are in active conversation about the next phase of work and I expect this to become a multi-year partnership. For any organisation in the Media & Entertainment space looking for a Web Development partner who combines technical rigour with genuine commercial awareness, I would put this team at the top of the shortlist.
Connected device platform that gave us real-time visibility we never had before
Camille Bertrand / Head of Digital Products - Hexagone Retail Group
Verified
Oct 15, 2023
Oct 15, 2023
Project summary: Remote and hybrid learning had exposed the limitations of our existing LMS and we needed a purpose-built solution that could scale to 50,000 concurrent users without degrading the experience.
We ran a structured RFP with seven vendors. Three made it to the technical evaluation stage. This team won on the strength of their technical proposal, their domain knowledge, and frankly on the quality of the questions they asked us during the process. A vendor who asks good questions in the sales phase tends to ask good questions during delivery too. That hypothesis proved correct. The project is now live, performing above the KPIs we agreed, and our stakeholders are genuinely impressed.
PROS
Business-aware approach to every technical decision, strong project governance, fast turnaround on feedback, zero drama during a genuinely complex engagement
CONS
We underestimated the internal resource commitment required on our side during discovery — the team warned us, we did not listen fully, and the first sprint was slower as a result
Project TypeIoT Development
IndustryEducation
Project CostLess than $10,000
DurationNov 2024 – May 2026
Questions & Answers
Please describe your company, your role, and the industry you operate in.
I lead technology at Hexagone Retail Group, a mid-sized organisation in the Education sector headquartered in Lyon, France. My remit as Head of Digital Products covers everything from infrastructure to product development. We had reached a point where our internal engineering capacity was not sufficient to execute our roadmap without an experienced external partner.
What specific problem or business challenge led you to hire this company?
Our Education regulatory environment had changed and the compliance timeline was non-negotiable. We needed to rebuild specific components of our system to meet the new requirements and our internal team was already fully committed to the core product roadmap. Bringing in a specialist IoT Development partner was the only realistic path.
What services did the company provide for your project?
Primarily IoT Development, though the scope naturally touched adjacent areas. They handled architecture design, implementation, integration with our existing systems, performance testing under realistic load, and knowledge transfer to our internal team. The breadth of what they covered without requiring us to bring in additional vendors was one of the reasons the project ran efficiently.
Why did you choose this company over other providers you considered?
A direct referral from a peer who had used them for a comparable IoT Development engagement in the Education space. That peer's experience had been excellent and their project profile was similar enough to ours that the recommendation carried real weight. Everything we found during our own evaluation reinforced that this was the right decision.
How clearly did the company understand your requirements and business goals?
Extremely well. They asked detailed questions, challenged vague requirements until they were specific, and proposed sensible defaults for decisions we had not yet made rather than just leaving them open. By the time development started there was no ambiguity in the backlog, which is a rare starting position.
How was your overall experience with their communication and project management?
Outstanding. I have worked with agencies that communicate beautifully during the sales process and go quiet during delivery. This was the opposite — structured, consistent, and genuinely informative throughout. Problems were surfaced early with proposed solutions rather than just problem statements, which made the inevitable mid-project decisions much easier to make.
Did the company deliver the project on time and within your expected budget?
Yes. I will note that the original timeline was aggressive and I had privately expected a slip. They managed to hold it by making smart sequencing decisions early on that I only fully understood in retrospect. The budget discipline was equally good — we received a single change request for scope we had introduced ourselves and it was priced fairly.
What tangible results or business impact have you seen since the project was completed?
The ROI case we presented to our board assumed a payback period of eighteen months. Based on current trajectory we will hit that in under a year. The efficiency gains in our Education operations have been more significant than the model projected, partly because the quality of the data coming out of the new system is enabling decisions we could not make before.
What did you like most about working with this company?
The continuity of the team. The engineers who scoped the work were the engineers who built it. That sounds like it should be standard practice but in my experience it often is not. The institutional knowledge that comes from that continuity pays dividends at every stage, particularly when you are dealing with a complex Education domain where context takes time to build.
Would you recommend this company to others, and would you work with them again?
Yes, without qualification. I have already made two direct referrals to peers in the Education sector who were facing similar IoT Development challenges. In both cases I gave the recommendation specifically because I was confident the experience would match what I described — which is a level of confidence I do not extend lightly.
Content platform our editors adopted without a single training complaint
Minjun Oh / Director of Engineering - Sejong Digital Corp
Verified
Nov 26, 2022
Nov 26, 2022
Project summary: Our growth into new markets required a multi-currency, multi-language commerce platform that our previous vendor had promised but never delivered.
The thing I appreciate most in retrospect is that they were honest when something was harder than expected. Twice during the project the team came to us proactively to say that a particular component needed more time to do properly and explained why cutting corners would create problems later. We gave them the time. Both decisions were correct. The resulting product is solid and we have had none of the post-launch instability that plagued our last two technology projects.
PROS
Senior engineers on our account throughout the entire project rather than a bait-and-switch to juniors after contract signing, transparent reporting, realistic estimates that proved accurate
CONS
We underestimated the internal resource commitment required on our side during discovery — the team warned us, we did not listen fully, and the first sprint was slower as a result
Project TypeCMS Development
IndustryRetail & E-commerce
Project Cost$150,000 to $499,999
DurationSep 2025 – Oct 2025
Questions & Answers
Please describe your company, your role, and the industry you operate in.
As Director of Engineering at Sejong Digital Corp, I manage a cross-functional technology team serving our Retail & E-commerce clients from Busan, South Korea. We are a commercially focused organisation and every technology decision we make is evaluated against a clear business case. We needed a partner who understood that context, not just the technical brief.
What specific problem or business challenge led you to hire this company?
We had a product concept validated by market research but no clear path to build it within our budget and timeline constraints. Our Retail & E-commerce competitors were moving quickly and we could not afford to spend eighteen months finding out a generalist agency could not execute the CMS Development work our product required.
What services did the company provide for your project?
The core engagement was CMS Development but expanded to include technical consultancy during the discovery phase, which helped us refine the requirements significantly before development began. They also took responsibility for coordinating with our third-party data providers, which removed a significant coordination burden from our internal team.
Why did you choose this company over other providers you considered?
Their portfolio included two projects that were sufficiently close to our own brief in terms of complexity, CMS Development scope, and Retail & E-commerce context that we felt confident they understood what we were asking. The proposal was technically rigorous, the pricing was transparent, and the proposed team structure gave us senior engineers throughout rather than just for the pitch.
How clearly did the company understand your requirements and business goals?
Better than we did at the start, which sounds like an exaggeration but is genuinely accurate. The discovery workshop they ran surfaced assumptions we had not examined and contradictions in our requirements that would have caused real problems mid-development. The functional specification they produced was the clearest articulation of our product that we had seen written down.
How was your overall experience with their communication and project management?
Communication was handled primarily asynchronously given the time zone difference between Busan, South Korea and the team's base, but it was managed so well that the gap rarely felt like a constraint. Written updates were clear and timely, escalations were handled promptly, and we never had to chase for a status update. The cadence was exactly right — enough to feel informed, not so much that it created overhead.
Did the company deliver the project on time and within your expected budget?
The project landed on the agreed delivery date and within the approved budget. We did add scope during the engagement — two features that became apparent as essential during user testing — and those were quoted, approved, and delivered without affecting the original scope timeline. That kind of clean change management is not something you can take for granted.
What tangible results or business impact have you seen since the project was completed?
The most direct measure is that the problem we hired them to solve no longer exists. Beyond that, the new CMS Development platform has reduced our operational overhead measurably, our team spends less time managing incidents and more time on product development, and we have been able to onboard two new enterprise clients who had previously cited our technical limitations as a barrier.
What did you like most about working with this company?
The quality of the written communication. This matters more than most clients articulate. Clear, concise, technically accurate updates that our non-technical stakeholders could read and understand. Proposals and change requests that made the decision obvious rather than obscuring it in jargon. That communication quality reduced our internal coordination overhead significantly.
Would you recommend this company to others, and would you work with them again?
Absolutely. I would recommend them with a specific note that the quality of the discovery process is where the value starts. Clients who invest properly in that phase will get the most out of the engagement. We made that investment and the returns are evident in the quality of what was delivered.
Company Info
Founded
2009
Employees
2 - 9
Hourly Rate
$100 - $149
Client Rating
5.0/5 (4 reviews)