Calvium

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4.6/5 (14 reviews)
+441172262000 hello@calvium.com Visit Website

About Calvium

It is specialists in designing & developing best mobile apps They help their clients to grow in a mobile world. From developing app solutions that enhance operational performance. They work in partnership with their clients, usually employing a co-creation way, and enjoy making and maintaining strong relationships with them.

Services

Mobile App Development UI-UX Design Enterprise App Development

Industries Served

Human Resources Gaming & Gambling Construction Advertising & Marketing

Calvium Reviews

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Sensor network and analytics layer built by engineers who understood both halves equally

Ji-Woo Park / VP of Engineering - Seoul Digital Corp
Verified
Feb 26, 2026

Project summary: Our internal product thinking was strong but our execution capability in this specific technology domain was limited. We needed depth, not generalism.

We had worked with three agencies before this engagement. The comparison is not flattering to the others. What distinguished this team was a systematic approach to understanding the problem before proposing a solution — something that sounds obvious and is practiced far less often than it should be. The delivery phase ran to schedule, the codebase is clean enough that our internal engineers made positive comments during handover review, and we have not logged a critical incident in five months of live operation. We intend to use them for our next phase of work.

PROS

Senior-level engineering presence throughout the entire project, not just during the pitch, honest and commercially fair handling of scope changes, codebase that our internal team praised on review

CONS

Their insistence on a detailed functional specification before development began felt like friction at the time. In retrospect, it was the reason the development phase ran without the ambiguity that has derailed similar projects for us previously

4.5
Overall
5.0
Quality
5.0
Schedule
4.5
Cost
4.5
Communication
Project TypeIoT Development
IndustryHuman Resources
Project Cost$500,000+
DurationAug 2025 – Nov 2025

Questions & Answers

Please describe your company, your role, and the industry you operate in.
I lead technology at Seoul Digital Corp, a growth-stage Human Resources business based in Seoul, South Korea. As VP of Engineering my remit spans product engineering, platform operations, and strategic vendor partnerships. We had reached an inflection point where our internal capacity was not sufficient to execute our roadmap at the pace our market required.
What specific problem or business challenge led you to hire this company?
Our platform had been maintained by a previous vendor for three years and the accumulated technical debt had reached a point where delivery velocity had dropped to a fraction of what it should have been. We needed fresh engineering expertise and a structured plan to address the underlying issues.
What services did the company provide for your project?
Primarily IoT Development, with adjacent work in solution architecture and quality assurance. They were responsible for the full build from requirements through to go-live, including integration with four existing systems in our technology landscape. The breadth they covered without requiring additional vendors was commercially and logistically valuable.
Why did you choose this company over other providers you considered?
The quality of the questions they asked during the briefing process was the first indicator. Vendors who ask precise questions in the sales phase tend to apply the same rigour during delivery. That hypothesis proved accurate. The technical proposal was substantive, the team structure was senior throughout, and the pricing was transparent.
How clearly did the company understand your requirements and business goals?
Thoroughly and precisely. The requirements document they produced was detailed enough that our QA team used it directly to write acceptance criteria. Every user story had a defined business objective attached. Nothing was left to interpretation. That discipline in the requirements phase paid dividends throughout development and testing.
How was your overall experience with their communication and project management?
Outstanding. The discipline around asynchronous communication was particularly effective given the time zones involved between Seoul, South Korea and the delivery team. Written updates were specific and consistent, response times were same-day for anything that required a decision, and nothing fell through the cracks across a six-month engagement.
Did the company deliver the project on time and within your expected budget?
Yes. I had privately built a contingency expectation into my planning given the project complexity and the number of integrations involved. None of that contingency was needed. The delivery landed on the agreed date and the final invoice matched the approved budget to within a fraction of a percent. That outcome is rarer than the industry acknowledges.
What tangible results or business impact have you seen since the project was completed?
We went live four months ago. User adoption exceeded the target we had set by 23 percent in the first month. Support ticket volume has dropped measurably. The features we had deferred because the previous architecture made them prohibitively expensive to build are now in development. The platform they built has opened our roadmap.
What did you like most about working with this company?
The willingness to be direct. When our requirements were unclear they said so. When our priorities were contradictory they explained why. When a technical approach we had assumed was the right one turned out to have significant downsides, they told us before we had committed to it. That kind of intellectual honesty is what I look for in a long-term technology partner.
Would you recommend this company to others, and would you work with them again?
Absolutely. With a specific note that the value starts in the discovery phase — clients who approach that process with seriousness will get the most from the engagement. We invested appropriately at the front end and the returns are evident in what was delivered.

Delivered on scope, on time, and with code quality that passed our strictest review

Shreya Krishnaswamy / VP of Product - Luminar Tech Pvt Ltd
Verified
Feb 19, 2026

Project summary: A previous engagement had delivered something that worked in staging and struggled in production. We approached this project with greater rigour in vendor selection as a result.

What made the most difference in practice was the quality of the engineering judgment on this team. Not the ability to execute a specification — that is a baseline expectation. The ability to recognise when a specification was suboptimal, explain why, propose an alternative, and support the client in making a decision about it. That consultative dimension elevated the output beyond what the brief described and resulted in a product that is more fit for purpose than the one we had originally specified.

PROS

Senior-level engineering presence throughout the entire project, not just during the pitch, honest and commercially fair handling of scope changes, codebase that our internal team praised on review

CONS

The engagement was priced at the quality level rather than the budget level. We evaluated the alternatives and concluded that the delta was a reasonable premium for the reduction in delivery risk

5.0
Overall
5.0
Quality
5.0
Schedule
4.5
Cost
4.5
Communication
Project TypeSoftware Development
IndustryGaming & Gambling
Project Cost$150,000 to $499,999
DurationFeb 2025 – Dec 2025

Questions & Answers

Please describe your company, your role, and the industry you operate in.
Luminar Tech Pvt Ltd is an established Gaming & Gambling organisation headquartered in Hyderabad, India. My role as VP of Product covers both strategic planning and operational technology delivery. We maintain high standards for our vendors because our clients hold us to high standards — a bar we expect our partners to meet.
What specific problem or business challenge led you to hire this company?
The immediate problem was that our Software Development capability had become the bottleneck limiting our ability to grow. Every feature request, every new client requirement, every internal initiative was delayed by a platform that had been extended beyond its original design. We needed a rebuild, not a patch.
What services did the company provide for your project?
The scope covered the full Software Development lifecycle: discovery and requirements definition, solution architecture, iterative development across twelve sprints, integration testing, performance validation, production deployment, and a structured four-week hypercare period. They also provided system documentation and a knowledge transfer programme for our internal team.
Why did you choose this company over other providers you considered?
A trusted peer in the Gaming & Gambling sector had used them for a comparable Software Development engagement and their recommendation was unequivocal. Our own due diligence confirmed the pattern they described. The combination of domain knowledge, Software Development depth, and demonstrated delivery discipline was the deciding factor.
How clearly did the company understand your requirements and business goals?
Better than we managed ourselves going in. The workshops they facilitated surfaced assumptions we had not examined and exposed three requirements that were in direct conflict with each other. Resolving those before development began saved us what would certainly have been significant rework later in the project.
How was your overall experience with their communication and project management?
The project management framework was the most structured I have experienced with an external vendor. Sprint planning was tight, acceptance criteria were specific, retrospectives were honest and acted on. The project manager treated the shared backlog as a live document and the risk register as an operational tool rather than a compliance artefact. I never had to ask for a status update.
Did the company deliver the project on time and within your expected budget?
On time and within the approved budget. The estimation accuracy was notable — they had broken the work down in sufficient detail during discovery that their forecast proved reliable throughout, rather than being a number that shifted with every change in scope. We received one change request and it was for scope we had introduced ourselves.
What tangible results or business impact have you seen since the project was completed?
Quantifying the impact precisely is complicated by other variables in our business, but the metrics we can attribute directly to the Software Development work are meaningful: session duration up, conversion rate up, error rate down, and our NPS for the digital touchpoint has improved by eleven points. Our account managers report that the new capability is coming up positively in client conversations.
What did you like most about working with this company?
The post-launch behaviour. Some vendors consider go-live to be the end of their professional obligation. This team treated it as the transition to a different kind of engagement. The hypercare period was substantive, the documentation was thorough and genuinely useful, and they checked in proactively at the thirty-day and ninety-day marks to review production metrics with us.
Would you recommend this company to others, and would you work with them again?
Yes, without reservation. I have already made two direct referrals within my Gaming & Gambling network — in both cases to peers facing Software Development challenges similar to ours. I gave those referrals with confidence because I knew the experience I described was reproducible, not the result of exceptional circumstances on our engagement.

A technology investment that delivered returns ahead of the business case we approved

Bram de Vries / Chief Technology Officer - Windmill Tech BV
Verified
Feb 16, 2026

Project summary: A previous engagement had delivered something that worked in staging and struggled in production. We approached this project with greater rigour in vendor selection as a result.

We had worked with three agencies before this engagement. The comparison is not flattering to the others. What distinguished this team was a systematic approach to understanding the problem before proposing a solution — something that sounds obvious and is practiced far less often than it should be. The delivery phase ran to schedule, the codebase is clean enough that our internal engineers made positive comments during handover review, and we have not logged a critical incident in five months of live operation. We intend to use them for our next phase of work.

PROS

Senior-level engineering presence throughout the entire project, not just during the pitch, honest and commercially fair handling of scope changes, codebase that our internal team praised on review

CONS

Time zone coordination required some deliberate overlap management from both sides in the first couple of sprints, after which we had an efficient async rhythm that worked for the whole project

4.5
Overall
4.5
Quality
4.5
Schedule
5.0
Cost
4.5
Communication
Project TypeIndustry-Specific Solutions
IndustryConstruction
Project Cost$500,000+
DurationMar 2025 – Dec 2025

Questions & Answers

Please describe your company, your role, and the industry you operate in.
Windmill Tech BV operates in the Construction sector with headquarters in Amsterdam, Netherlands. In my role as Chief Technology Officer I am accountable for the full technology agenda — infrastructure, product, and vendor relationships. We are a commercially driven organisation and every technology decision is evaluated against a clear business case before it is approved.
What specific problem or business challenge led you to hire this company?
We had a defined product vision for our next phase of growth in the Construction market but lacked the engineering depth internally to execute it. The Industry-Specific Solutions requirements in particular required specialist experience that we could not realistically recruit for on the timeline our business plan required.
What services did the company provide for your project?
The core engagement was Industry-Specific Solutions delivery, though their scope expanded to include technical consultancy during discovery that materially improved our requirements. They also took ownership of the third-party integration workstream that had been a coordination challenge in previous projects, removing that complexity from our internal team entirely.
Why did you choose this company over other providers you considered?
The quality of the questions they asked during the briefing process was the first indicator. Vendors who ask precise questions in the sales phase tend to apply the same rigour during delivery. That hypothesis proved accurate. The technical proposal was substantive, the team structure was senior throughout, and the pricing was transparent.
How clearly did the company understand your requirements and business goals?
Thoroughly and precisely. The requirements document they produced was detailed enough that our QA team used it directly to write acceptance criteria. Every user story had a defined business objective attached. Nothing was left to interpretation. That discipline in the requirements phase paid dividends throughout development and testing.
How was your overall experience with their communication and project management?
Outstanding. The discipline around asynchronous communication was particularly effective given the time zones involved between Amsterdam, Netherlands and the delivery team. Written updates were specific and consistent, response times were same-day for anything that required a decision, and nothing fell through the cracks across a six-month engagement.
Did the company deliver the project on time and within your expected budget?
Yes to both. There was a single sprint where a dependency on a third-party API introduced a one-week delay. The team identified it three weeks in advance, presented two mitigation options, and we agreed on an approach that recovered the schedule within the same sprint cycle. That level of foresight is what separates good project management from reactive problem management.
What tangible results or business impact have you seen since the project was completed?
Quantifying the impact precisely is complicated by other variables in our business, but the metrics we can attribute directly to the Industry-Specific Solutions work are meaningful: session duration up, conversion rate up, error rate down, and our NPS for the digital touchpoint has improved by eleven points. Our account managers report that the new capability is coming up positively in client conversations.
What did you like most about working with this company?
The continuity of the team. The engineers who participated in the discovery sessions were the engineers who built the system. That consistency of institutional knowledge across a six-month project has a value that is difficult to quantify but easy to notice when it is absent. Every conversation built on the previous ones.
Would you recommend this company to others, and would you work with them again?
Absolutely. With a specific note that the value starts in the discovery phase — clients who approach that process with seriousness will get the most from the engagement. We invested appropriately at the front end and the returns are evident in what was delivered.

Data engineering quality that will support our growth for years without a rebuild

Vikram Srinivasan / Head of Platform - Cascade EdTech Solutions
Verified
Jan 20, 2026

Project summary: Multi-touch attribution across our media mix had become the most-requested capability from every client in our portfolio. We could not deliver it without rebuilding our data layer.

The project brief was ambitious and we had received proposals ranging from two to five times our eventual budget from other vendors. This team came back with a proposal that was commercially realistic and technically credible — and then delivered against it. That alignment between proposal and outcome is not something I take for granted. I have been on the other side of it enough times to know it requires both honesty in the sales process and discipline in delivery. We experienced both.

PROS

Architectural decisions designed for longevity rather than just the current brief, thorough automated test coverage, post-launch stability that validated every technical choice made during discovery

CONS

Pipeline availability for kickoff required a few weeks of lead time — in hindsight that selection pressure means you are working with a team that is in demand for the right reasons

4.5
Overall
4.0
Quality
4.0
Schedule
5.0
Cost
4.5
Communication
Project TypeData & Analytics
IndustryAdvertising & Marketing
Project CostLess than $10,000
DurationJul 2025 – Oct 2025

Questions & Answers

Please describe your company, your role, and the industry you operate in.
Cascade EdTech Solutions is an established Advertising & Marketing organisation headquartered in Chennai, India. My role as Head of Platform covers both strategic planning and operational technology delivery. We maintain high standards for our vendors because our clients hold us to high standards — a bar we expect our partners to meet.
What specific problem or business challenge led you to hire this company?
Regulatory requirements in our Advertising & Marketing segment had changed and the compliance timeline was set by our regulator, not by us. The Data & Analytics changes required were significant enough to justify engaging a specialist partner rather than diverting our internal team from the product roadmap.
What services did the company provide for your project?
The core engagement was Data & Analytics delivery, though their scope expanded to include technical consultancy during discovery that materially improved our requirements. They also took ownership of the third-party integration workstream that had been a coordination challenge in previous projects, removing that complexity from our internal team entirely.
Why did you choose this company over other providers you considered?
A trusted peer in the Advertising & Marketing sector had used them for a comparable Data & Analytics engagement and their recommendation was unequivocal. Our own due diligence confirmed the pattern they described. The combination of domain knowledge, Data & Analytics depth, and demonstrated delivery discipline was the deciding factor.
How clearly did the company understand your requirements and business goals?
Comprehensively. The discovery phase they ran was more thorough than anything we had experienced with previous vendors. They challenged requirements that were vague or contradictory, proposed alternatives where our initial thinking was limiting, and produced a functional specification that our internal stakeholders agreed was the clearest articulation of the product they had seen written down.
How was your overall experience with their communication and project management?
Communication was proactive, timely, and appropriately calibrated. Technical updates for the engineering audience, executive summaries for the steering group, risk flags with proposed mitigations rather than just problem statements. The fortnightly sprint reviews gave our stakeholders visibility without requiring them to attend every working session.
Did the company deliver the project on time and within your expected budget?
Yes. I had privately built a contingency expectation into my planning given the project complexity and the number of integrations involved. None of that contingency was needed. The delivery landed on the agreed date and the final invoice matched the approved budget to within a fraction of a percent. That outcome is rarer than the industry acknowledges.
What tangible results or business impact have you seen since the project was completed?
The most direct measure is the performance of the system in production. In the five months since go-live we have had zero P1 incidents, our page performance scores have improved across every Core Web Vitals metric, and two enterprise clients who had cited our previous platform limitations during contract negotiations have since renewed without that objection arising.
What did you like most about working with this company?
Their instinct for keeping the business objective visible throughout technical decision-making. I have worked with technically excellent teams who lose the strategic thread as complexity increases. This team maintained a clear connection between every architectural choice and the outcome we had agreed to achieve. That orientation made the trade-off conversations significantly easier.
Would you recommend this company to others, and would you work with them again?
Absolutely. With a specific note that the value starts in the discovery phase — clients who approach that process with seriousness will get the most from the engagement. We invested appropriately at the front end and the returns are evident in what was delivered.

FAQs

How much does it cost to hire Calvium?
The cost of hiring Calvium depends on factors such as project complexity, development hours, required technologies, team size, and engagement model. Based on available data, Calvium's typical hourly rate is around N/A, with an average project cost of $10000+.
What technologies does Calvium specialize in?
Depending on the project requirements, Calvium may work with technologies such as React, Angular, Vue.js, Node.js, Python, .NET, Java, PHP, Flutter, React Native, iOS, Android, AWS, Azure, AI, and cloud platforms. For context, it has experience across industries such as Advertising & Marketing, Travel & Hospitality, Fashion & Apparel, Real Estate, Healthcare and Gaming & Gambling, and it has been operating since 2009.
Why should businesses choose Calvium?
Businesses may choose Calvium based on factors such as technical expertise, industry experience, client reviews, development methodology, communication practices, and the ability to deliver scalable software solutions that align with business objectives. Founded in 2009, the company has built a track record of delivering projects across various industries.
What engagement models does Calvium provide?
Calvium may offer multiple engagement models such as fixed-price contracts, dedicated team hiring, and time-and-material billing, allowing businesses to choose the option that best fits their budget and project scope. For context, its listed capabilities span Enterprise App Development, Mobile App Development and UI-UX Design, and it has experience across industries such as Advertising & Marketing, Travel & Hospitality, Fashion & Apparel, Real Estate, Healthcare and Gaming & Gambling.
Does Calvium sign an NDA before starting a project?
Most professional software development companies, including Calvium, are willing to sign a Non-Disclosure Agreement (NDA) to protect client data and project confidentiality before development begins. For context, it has experience across industries such as Advertising & Marketing, Travel & Hospitality, Fashion & Apparel, Real Estate, Healthcare and Gaming & Gambling, and its listed capabilities span Enterprise App Development, Mobile App Development and UI-UX Design.
Which countries does Calvium serve?
Calvium may serve clients across multiple countries and regions, including United-kingdom, depending on market demand and business partnerships.
Does Calvium develop SaaS products?
Yes, Calvium may offer SaaS product development services, including multi-tenant architecture, subscription billing integration, and cloud-native deployment for scalable software-as-a-service solutions. For context, it has served clients in United-kingdom, and it has experience across industries such as Advertising & Marketing, Travel & Hospitality, Fashion & Apparel, Real Estate, Healthcare and Gaming & Gambling.
What is Calvium's software development process?
Calvium typically follows a structured software development process that may include requirement analysis, UI/UX design, agile development sprints, quality assurance testing, deployment, and post-launch support. For context, it has served clients in United-kingdom, and it has experience across industries such as Advertising & Marketing, Travel & Hospitality, Fashion & Apparel, Real Estate, Healthcare and Gaming & Gambling.
How do I request a proposal from Calvium?
You can request a proposal from Calvium by submitting your project requirements through its website contact form, email, or by reaching out directly to discuss your business goals and receive a tailored development estimate. For context, it has experience across industries such as Advertising & Marketing, Travel & Hospitality, Fashion & Apparel, Real Estate, Healthcare and Gaming & Gambling, and its listed capabilities span Enterprise App Development, Mobile App Development and UI-UX Design.

Company Info

Founded 2009
Employees 10 - 49
Hourly Rate N/A
Avg. Project Cost $40,000+
Client Rating 4.6/5 (14 reviews)

Rating Breakdown

Quality
4.5
Schedule
4.6
Cost
4.5
Communication
4.6