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Turnkey startup development

  • FinTech
  • Web3
  • SaaS
  • Marketplaces
  • Mobile apps
Project stage
Service category

A startupwithout the technical routine

Focus on the business, not the code

Building a startup is a complex, high-stakes process in which the owner has plenty of tasks besides development. You can focus on what matters most: uncovering the pains and problems of your potential customer.

From idea to first sales

Turnkey startup development covers the path from the idea to launching the product and bringing it to market. The team gathers and defines the product requirements, both technical and business, builds a prototype and releases the first version to the market. The work is done at a fixed price for the result.

  • Fixed budget
  • Demand validation
  • Understanding customers
  • Turnkey development
  • First product version
  • Clear launch plan

Who turnkey startup development is for

The service suits founders who have an idea but no team, experience or processes to bring it to life.

Founders without a tech team

  • Teams or founders who are not ready to hire staff and spend time on it before demand is confirmed

  • Entrepreneurs with an idea but no in-house developers

  • Founders who need a technical partner at the start, one that not only delivers to the spec but also knows what should work and how

  • Founders who want to focus on sales rather than managing a tech team and building processes that bring no profit at the start

Projects at the stage of
a validated idea

  • Teams that have done market research and are ready to launch

  • Projects with first customers but no digital product, when the first deals need to be turned into a clear process

  • Startups that need traction for talks with investors and closing the next rounds

  • Founders who need the whole project packaged and built without pauses or stops

An established business
with a new direction

  • Companies launching a separate product for a new audience

  • Businesses turning an offline process into a digital format

  • Companies that need process automation or scaling without growing the team through a technical solution

What the startup development service includes

Startup development comes in three formats. The choice depends on the project stage and on what the owner really needs. Some need reliable hands on the project that will figure out how to build something the world has not seen yet. Others need a team ready to dive into the project together with the client to hit target metrics - not just to ship the product technically, but to achieve the commercial goals of the project.

PoC - validating technical feasibility

A PoC answers one question: is the idea technically feasible. The format fits when the product rests on a non-standard technical solution or on building a new technology from scratch. The result is a working fragment of the system and a conclusion on the complexity of the full build.

What the client gets:

  • A prototype of the key technical mechanism
  • A roadmap and implementation sequence for bringing the product to market
  • An assessment of architectural risks
  • An estimate of the cost and timeline of the full build

MVP - the first product version

An MVP includes the minimum features needed to test demand on real users. The format fits when the market is clear but not yet confirmed. The result is a working product and data on how the first users behave.

The client gets not just an MVP but a clear plan for growing the business after measuring the vital metrics:

  • A roadmap and plan for integrating new functionality
  • A working prototype with the core user scenarios
  • Technical documentation and source code
  • A first product version ready for launch
  • Tools that help analyse the metrics of the first users

Full cycle of building a project
from scratch

The full cycle covers the whole path from research to launch and product growth.

The format fits when the hypothesis is confirmed, the owner has the expertise to assess market demand, or the product enters an already clear competitive market where the owner knows the direction from their own expertise but needs a team to deliver all tasks end to end.

The result is a finished product that has reached the market, project packaging and materials for investors.

What the client gets:

  • A product with the full set of features and integrations, ready to work on the market right away
  • A plan for handling commercial risks
  • Design, brand identity and project packaging
  • A financial model and an investor presentation
  • A roadmap and plan for developing the project against its target metrics
  • Infrastructure and documentation for further growth and scaling
What is not included in the price
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Some costs are borne by the project directly. These items are paid separately and are not part of the work budget.

  • Hosting and cloud infrastructure;
  • Third-party service licences - KYC/AML providers, payment gateways;
  • Payment system fees;
  • Company registration and licensing;
  • Marketing budget.

The scope of work is fixed before the start. The budget does not grow during the project. We work at a fixed price and have no interest in building something endless that never reaches the market.

Turnkey startup for business:why it works

The main reason projects shut down is lack of demand: 42% of companies close for exactly this reason. Not team mistakes, not a slow start, not a budget that grows with the project, and not even technical errors. A product is built for a year, the full budget goes into it, and only after launch does the result show - the market does not need the product. The turnkey format moves this check to the start of the journey. We check whether the product has a market and whether the solution suits the target customer.

What a turnkey startup solves for business

  • Building your own team takes months

    Hiring developers, an analyst and a designer stretches over several months. On top of that come onboarding and the management load on the founder.

    A ready team starts right away, with no time lost on hiring and setting up processes.

  • Several contractors blur responsibility

    Design with one contractor, code with another, analytics with a third. When something breaks, everyone points at the others, and deadlines and costs grow.

    One contractor is responsible for the whole result.

  • Hourly billing does not cap the budget

    With hourly billing the final amount is unknown until the end of the project and, to be honest, it is rarely lower than planned.

    A fixed price for the result

    removes the risk of an endless build and makes the process predictable not only for the founder but also for investors. Dragging the work out does not pay for the contractor.

  • Freelancers do not cover product tasks

    What is needed is not hands and hours but industry expertise combined with processes for bringing projects to market. A freelancer does the assigned task but does not check whether it makes sense. Without product expertise you get an interface without a tested hypothesis.

    A product team works with the goals and tasks of the business, not just the technical specification.

  • The first version turns into technical debt

    A fast launch without planning for growth leads to rewriting the code. The architecture is designed with headroom for load and new features.

    The product is extended on top of a ready core instead of being rewritten.

    And what matters more for the business: the product can keep going while scaling and take the market at the speed it needs.

  • The founder spends time on operations

    Managing staff without established processes takes time away from what brings profit: sales, work with investors, strategic planning and market research.

    A single contractor runs the processes on its own.

    The founder focuses on growing the business.

Startup development stages

The work is split into five stages. Each ends with a result that the client accepts before moving on to the next one.

  1. 1

    Idea validationand market research

    Startup idea development starts with testing demand. The team studies the market, competitors and target audience and calculates unit economics. CustDev is carried out - interviews with potential customers. Result: a confirmed or refuted hypothesis with calculations.

  2. 2

    Concept and prototype

    Functional requirements and implementation priorities are defined. A user journey map and a UX/UI prototype in Figma are created. The prototype complements the technical specification. Result: a prototype, a prioritised feature list, a technical specification and the documented rules the platform must follow.

  3. 3

    Building the firstproduct version

    Development runs in short Agile iterations. Frontend, backend and integrations come together into one system. The product goes through internal testing and is ready for client acceptance. Result: a working first version of the product.

  4. 4

    Launch, data collectionand growth

    The product is released to a limited group of users. The team collects behavioural data and feedback from the first users. Features are adjusted based on the results. Result: a launched product and usage metrics.

  5. 5

    Preparing the project for investmenton confirmed metricsand traction

    Even if no round needs to be closed, a financial model and a presentation are prepared based on real data. The investor or client gets not an intention or a feeling about whether the project will succeed, but confirmed numbers. Result: round documentation, a financial model, a list of the project's commercial risks and a development plan depending on reaching key metrics.

Technologies and team

The project is handled by a product team, not just programmers. The team is put together for the task of a specific project.

The team includes:

  • Product analyst

  • Project manager

  • UX/UI designer

  • Frontend and backend developers

  • Mobile developers

  • DevOps engineer

  • QA engineer

  • Financial analyst

  • VC scout,

    if the team has a specialist suited to the industry.

Timeline

The timeline depends on the format, the scope of functionality, the number of roles in the system and the integrations.
  1. 2 months

    PoC

    Technical feasibility check, mechanism prototype, risk assessment

  2. 2 - 4 months

    MVP

    Analytics, prototype, development, testing, launch

  3. 4 - 8 months

    Full cycle

    Research, product, design, packaging, investor materials

Project estimation is free. Cost and timeline are fixed before work starts.

Why Defence.Investments is better than competitors

  • Real experience
    in complex products

    Over 10 years of work, 30+ specialists, 100+ completed projects. The team works with financial and technology products of varying complexity.

  • No
    hidden payments

    The client pays the amount quoted for the result. Payment is not tied to development hours. Dragging the project out does not pay for the contractor.

  • Product expertise,
    not just code

    The team includes analysts and experts in economics. Product decisions are made on data, not assumptions.

  • Confidentiality

    The company works with financial products and complies with NDAs. The fact of cooperation itself is not disclosed without agreement.

  • Architecture
    with headroom for growth

    The first version ships fast but does not limit growth. New features are added without rebuilding the system core.

  • Support after launch

    The team stays after the release. The product is improved based on user feedback and metrics.

OUR CASES

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Just tell us about your project, and we will contact you to discuss everything

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Frequently asked questions

Questions you will get answers to

Launch and idea validation

  • What CustDev is and how it is done

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    CustDev (Customer Development) is a method of testing an idea through conversations with potential customers before development starts. The goal is to confirm that the problem exists and people are ready to pay for solving it. It is done like this: define the segment, find 15-20 representatives, ask about past experience - how the person solved the problem before and how much time and money it took. Questions about willingness to "use such a service" give distorted results, so they are avoided. The result of CustDev is a list of confirmed and refuted hypotheses that shapes the scope of the first product version.

  • What unit economics is and how to calculate it

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    Unit economics is the calculation of profitability per customer or per deal. The basic formula: revenue from a customer over the whole relationship (LTV) minus the cost of acquiring them (CAC). The model is considered healthy when LTV exceeds CAC at least threefold; with a ratio below 1:1 the business loses money on every new customer. The calculation needs four values: average check, purchase frequency, customer lifetime and marketing and sales costs. A rough calculation is done before development - it shows under what conditions the project can become profitable at all.

  • How to estimate the market size for a startup

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    Market size is estimated on three levels: TAM, SAM and SOM. TAM is the total market volume, SAM is the reachable part given geography and segment, SOM is the share the project can realistically take within 3-5 years. Two approaches are used: top-down - from industry reports and statistics, and bottom-up - from the number of potential customers multiplied by the average check and purchase frequency. The bottom-up calculation is more accurate, and it is the one investors ask for. Data sources: industry research, official statistics, competitors' revenue, search query volumes.

  • How a PoC differs from an MVP

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    A PoC tests the technical feasibility of a solution, an MVP tests whether people are ready to use the product and pay for it. A PoC answers whether the idea can be built technically: whether the algorithm works, whether the architecture handles the load, whether integration with a specific bank, exchange or blockchain is possible. A PoC may have no interface, it is not shown to users, and it takes 2-4 weeks. An MVP is a working product with a minimal feature set released to real users, taking 2-4 months. A PoC is needed when there are technical unknowns; when the product is assembled from proven solutions, this stage is skipped.

  • What Product Market Fit is

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    Product Market Fit (PMF) is the state in which the product meets real demand and the market accepts it without constant effort from the team. Signs: users come back on their own, organic inflow grows, retention stabilizes instead of falling constantly. A numerical benchmark is Sean Ellis's survey: if more than 40% of users would be disappointed to lose the product, PMF is considered achieved. Before PMF, investing in scaling marketing does not pay off - the budget goes to users who do not stay. After PMF, the main task becomes growing and retaining the audience.

  • How many startups close and why

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    According to CB Insights, about 90% of startups close within the first five years. The main reason is lack of demand: 42% of projects built a product the market did not need. Next come running out of money (29%), team problems (23%), competition (19%) and a wrong pricing model (18%). The percentages add up to more than 100% because projects close for several reasons at once. The practical takeaway: validating demand before development removes the most common risk.

Product and development

  • What Agile is and how it differs from waterfall

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    Agile is an approach where the product is built in short cycles of 1-2 weeks with a demo of the result after each. Waterfall works sequentially: requirements are fixed completely first, then the product is designed, developed and tested, and the finished result appears at the end. Agile allows requirements to change along the way and gives feedback early. Waterfall suits projects with rigid requirements where changes are expensive - for example, under strict industry regulation. Startups use Agile more often, because requirements are refined as data from users comes in.

  • How a native app differs from a cross-platform one

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    A native app is written separately for each platform - Swift for iOS and Kotlin for Android. A cross-platform app is built on a single codebase with Flutter or React Native and runs on both platforms. Native development gives maximum performance, full access to device capabilities and stability with complex graphics. Cross-platform development cuts the budget and timeline by about 30-40%, since the team maintains one codebase instead of two. For an MVP and apps with standard logic the cross-platform option is chosen more often; native is chosen for high requirements on speed, graphics or work with device hardware.

  • What technical debt is

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    Technical debt is accumulated shortcuts in code and architecture that sped up development now and make changes harder in the future. It arises under tight deadlines, when a solution is chosen for speed of implementation. It shows like this: each new feature takes more and more time, the number of bugs grows, adding one module forces rewriting neighboring ones. Technical debt cannot be avoided completely, and part of it is taken on deliberately - for example, at the MVP stage. Unaccounted debt is the dangerous kind: an architecture that has to be rewritten entirely right after demand is confirmed.

  • How to choose a tech stack for a startup

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    The stack is chosen by three criteria: the product's tasks, availability of specialists on the market and the expected load. For web products a common set is React or Vue on the frontend, Python, Go, Java or Node.js on the backend, and PostgreSQL as the database. In fintech strict typing and a mature ecosystem matter, so Java, Go or Python are chosen more often. Rare technologies make the start cheaper and create a hiring problem a year later, when the author of the code leaves the project. Choose solutions with a large community and proven performance under load, and leave exotic ones for tasks that cannot be solved without them.

  • Who should be on the team at the start

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    The minimum team to launch a product: a product analyst, a designer, a frontend and a backend developer, a QA engineer and a project manager. A DevOps engineer joins for deployment and infrastructure setup, often part-time. A mobile developer is needed when the release includes an iOS and Android app. On the business side, a person who makes product decisions is a must - this role cannot be handed over to a contractor. Hiring such a team in-house takes several months, so at the hypothesis testing stage a ready-made team is more often engaged.

  • What DevOps is and why a project needs it

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    DevOps is the practice responsible for infrastructure, deployment and stable operation of the product. The specialist sets up servers, automated release of updates (CI/CD), monitoring, backups and access management. Without this, rolling out a new version becomes a manual operation with the risk of bringing the product down, and the team learns about failures from user complaints. At the start DevOps is usually needed part-time - for initial infrastructure setup and connecting monitoring. As the load grows, the role expands to managing scaling and system fault tolerance.

Money and investment

  • What investment rounds there are

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    Rounds correspond to the project's stages of maturity. Pre-seed is money for validating the idea and the first product version, from founders, friends and business angels. Seed is for launching the product and attracting the first users. Round A is raised for scaling, when the unit economics is confirmed and growth channels are clear. Then come rounds B, C and beyond - for capturing the market and entering new segments. In each round the investor gets a share, so the dilution of founders' stakes is calculated in advance, at the first deal.

  • How and where to find the first investor

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    The first investor is sought among those who understand your industry and stage. Main channels: industry conferences and demo days, accelerators, business angel clubs, specialized Telegram communities, platforms like AngelList and warm introductions through your current network. A recommendation from someone the investor trusts works many times better than a cold email. Before going into negotiations, make a list of 30-50 names and sort it by industry, stage and average deal size. Mass mailing gets a low response and damages the project's reputation in a narrow industry circle.

  • What it takes to attract the first investor

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    To attract the first investor you need to show confirmed demand and the team's ability to deliver. The minimum set: a working product or prototype, first users with data on their behavior, a financial model, a pitch deck and a clear deal structure - how much you are raising, for what and what share you are giving. The legal side must be ready in advance: a registered legal entity, rights to the code and brand, formalized agreements between founders. The conversation is built around numbers: customer acquisition cost, revenue, retention and a 12-18 month plan. A project without metrics is seen as an idea, and negotiations rarely go beyond the first meeting.

  • What an investor needs besides a pitch deck

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    Besides the pitch deck, an investor requests a financial model, product metrics and legal documents. The financial model shows how the project reaches profit, with a 3-5 year forecast. Metrics are actual data: number of users, retention, revenue, customer acquisition cost. The legal package includes the ownership structure, rights to the code and trademark, and contracts with key employees. Special attention is paid to the team: the founders' experience, the distribution of shares and their motivation to stay in the project over several years.

  • How to value a startup

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    Early-stage startup valuation is based on comparison with similar deals and on the parties' negotiating positions. For projects with revenue, multiples of annual revenue or the discounted cash flow (DCF) method are applied. At the pre-revenue stage the Berkus method and the scorecard method are used, where the valuation is made up of team quality, product stage, market size and confirmed demand. In practice the figure follows from the round size and the share: raising $300K for 15% gives a post-money valuation of $2M. An inflated valuation in the first round complicates the next one, so it is aligned with a realistic growth plan.

  • What a project financial model is

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    A financial model is a calculation that shows how the project earns revenue and reaches profit. It consists of blocks: revenue sources, the customer acquisition funnel, team and marketing costs, investment and monthly cash flow. The planning horizon for a startup is 3-5 years, with the first year detailed by month. The model is built in three scenarios: base, optimistic and pessimistic. Its main value is in testing assumptions - it shows at what customer cost and retention the business becomes profitable.

  • How to protect your idea when handing it to a contractor

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    Protection starts with an NDA signed before discussing project details. The development contract fixes the transfer of exclusive rights to the code, design and documentation to the client - by default the rights stay with the contractor. Access to repositories, servers, domains and service accounts is registered to you and granted to the contractor as needed. The name and logo are protected by trademark registration, and the source code can be deposited with a notary or a specialized service if needed. The idea itself is not legally protected, so what you protect is its implementation: the code, the brand, the data and the speed of getting the product to market.

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