Web3 CompanyWallets, payments and AI · Est. 2020

Crypto and AI products,
built for the globe.

Q: How quickly can a team start?

Most engagements begin within two to three weeks of a signed statement of work. Architecture Sprints can usually start sooner because they need a smaller team.

Q: Do you work inside our infrastructure?

Yes. We work in your repositories and your cloud accounts by default, using scoped access that you grant and can revoke. You own every artifact we produce from day one.

Q: Can you audit a contract you did not write?

Yes, and we frequently do. Independent audits are scoped separately from build work, and we will tell you plainly when a codebase needs remediation before an audit is worth paying for.

Q: How do you handle regulated or sensitive data?

We design to the standard your auditors apply — SOC 2, GDPR, CCPA or sector-specific rules — with data classification, access policy and audit logging agreed during discovery rather than retrofitted.

Q: What does an engagement cost?

Architecture Sprints and audits are fixed or scoped fees. Product Pods are a monthly retainer with a three-month minimum. We quote after discovery so the number reflects the actual scope.

Q: Who owns the intellectual property?

You do. All code, designs and documentation are assigned to you on payment, and we hand over repositories, infrastructure and credentials at the end of every engagement.

We build crypto and AI products for a global market. We run our own platforms — DripPay and Cryptoinfra — and engineer the wallet, payment and intelligence infrastructure behind our partners'.

Start a project See our products

StakingVault.solaudited

01  contract StakingVault is Ownable {
02    mapping(address => uint256) public staked;
03
04    /// @notice Invariant: sum(staked) == totalAssets()
05    function stake(uint256 amount) external nonReentrant {
06      _pull(msg.sender, amount);
07      staked[msg.sender] += amount;
08      emit Staked(msg.sender, amount);
09    }
10  }

Coverage

98.4%

Gas / stake

62,140

Findings

0 crit

MPC custody enabled

p99 < 120ms

Assets we work with

TronTRX
Primary settlement rail
EthereumETH
Contracts and ERC-20 rails
BitcoinBTC
Custody and treasury
SolanaSOL
High-throughput payments
BNB ChainBNB
BEP-20 rails and swaps
GramGRAM
The Open Network

Our products

We ship our own platforms, not just client work

Two live products carry real users and real money. They are where our engineering standards get tested first — and the reason we can talk about custody, ledgers and card rails from experience rather than from a deck.

Consumer · Live

DripPay

Spend stablecoins like real money. A wallet for USDT, USDC, Bitcoin and TRX, a virtual USD Visa card, and live rates in your own currency — with an account you can open in about a minute.

Multi-asset stablecoin wallet
Virtual USD Visa card
Live FX in your local currency
Deposit from any wallet or exchange

Cryptoinfra

White-label custodial wallet infrastructure on TRON. Permanent deposit addresses, a double-entry ledger, payouts, swaps and card issuing — all behind one REST API.

Permanent deposit addresses
Double-entry ledger
Payouts, swaps and OTC
Card issuing over one API

End-to-end engineering across the full product surface

From the first architecture decision to the on-call rotation that keeps it up. Six practices, one senior team, one accountable delivery model.

Zero to scale

SaaS Product Engineering

Multi-tenant platforms engineered for scale, performance and a user experience your customers renew for. We own the path from blank repo to production SLA.

Multi-tenant architecture & billing
Design systems and component libraries
Usage metering, entitlements, RBAC
SOC 2 aligned engineering practice

On-chain systems

Crypto & Web3 Development

Smart contracts, custody rails, exchange infrastructure and token systems built the way institutions expect: audited, observable and upgrade-safe.

Solidity & Rust smart contracts
DeFi protocols, staking and vaults
Wallets, MPC custody, key management
Indexers, subgraphs and on-chain analytics

Intelligence layer

AI & Data Platforms

Retrieval pipelines, agents and evaluation harnesses that survive contact with real users — grounded in your data, measured against real outcomes.

RAG pipelines and vector search
Agentic workflows and tool orchestration
Evaluation, guardrails and observability
Warehouse modelling and BI surfaces

Runs at 3am

Cloud, DevOps & SRE

Infrastructure as code, progressive delivery and the observability to sleep through a launch. We build platforms your engineers actually want to deploy to.

Terraform, Kubernetes, serverless
CI/CD and progressive delivery
Cost engineering and FinOps
Incident response and SLO design

Adversarial review

Security & Contract Audits

Threat modelling, application penetration testing and line-by-line smart contract review before your users — or an attacker — find the gap.

Smart contract audit & invariant testing
Threat modelling and secure design review
Application penetration testing
Key management and signing policy

Compounding demand

Growth & AdTech Engineering

The original SPDJ discipline, rebuilt for product companies: attribution you can trust, programmatic infrastructure and lifecycle automation.

Server-side tracking & attribution
Programmatic ad infrastructure
Technical SEO and Core Web Vitals
Lifecycle and retention automation

Ecosystem

The rails we build on, and the partners behind them

Moving money globally means depending on people who have already solved a piece of it. These are the networks and platforms our products settle, issue and scale through.

Product and company names shown are trademarks of their respective owners. Their marks are used to identify the platforms our products integrate with, and do not imply endorsement.

Why SPDJ Media

The studio you hire when the system has to hold

Six commitments that shape every engagement — and that you can hold us to in writing.

Senior engineers only

The people in your kickoff are the people writing the code. No bait-and-switch staffing, no junior bench billed at senior rates.

Security is not a phase

Threat modelling starts in week one and audit findings are tracked as first-class work items, not a checkbox before launch.

You own everything

Your repositories, your cloud accounts, your keys. We work inside your infrastructure and hand over clean, documented systems.

Measured, not asserted

SLOs, evaluation harnesses and load tests. If we claim a system is fast or accurate, there is a dashboard proving it.

Global by default

Distributed delivery across US, European and APAC hours, with real overlap for your team wherever it sits.

Automation over headcount

We would rather ship the pipeline that removes the work than bill you for doing it manually every month.

How we work

A delivery model with no black boxes

Five phases, each with named outputs you receive whether or not you continue to the next one. You are never buying a promise you cannot inspect.

01
Discovery & Architecture
1–2 weeks
We pressure-test the problem before we touch a keyboard: users, constraints, threat model, and the architecture that survives your next order of magnitude.
- Technical architecture
- Threat model
- Scope & estimate
02
Design & Prototype
2–3 weeks
Interface design and a working prototype in the same sprint, so stakeholders react to something real instead of a slide about something real.
- Design system
- Clickable prototype
- Product spec
03
Build in Public Sprints
6–16 weeks
Two-week sprints against a shared board. Every increment is deployed, tested and demoed — you always know exactly what you have bought.
- Production increments
- Test coverage
- Sprint demos
04
Harden & Audit
2–4 weeks
Load testing, penetration testing and — for on-chain systems — an independent contract audit with every finding tracked to resolution.
- Audit report
- Load test results
- Runbooks
05
Launch & Operate
Ongoing
Progressive rollout with SLOs, on-call and observability in place — then we either operate it with you or hand it to your team with the keys and the docs.
- SLO dashboard
- On-call rotation
- Handover docs

Selected work

Representative engagements, described in the open

Client names are withheld under NDA. What follows is the shape of the problem, the decisions we made, and the properties the delivered system holds.

Digital Asset Infrastructure

Institutional staking platform

The challenge: A digital asset manager needed to open staking to institutional clients without ever holding customer keys in a single place, and without a custody model their auditors would reject.
What we did: We designed a threshold-signing custody layer with policy-based approvals, built the validator orchestration and reward-accounting pipeline, and put the withdrawal contracts through invariant testing and independent audit before mainnet.

Solidity
Rust
Go
Kubernetes
PostgreSQL

MPC
Threshold custody, no single key
0
Critical audit findings at launch
T+0
Reward accounting reconciliation

Vertical SaaS

Multi-tenant operations platform

The challenge: A fast-growing operations company had outgrown a single-tenant application: onboarding a customer took weeks of manual configuration and every release risked cross-customer regressions.
What we did: We re-architected the product around tenant isolation with row-level security, shipped a design system and self-serve onboarding, and introduced usage metering wired directly into billing and entitlements.

Next.js
TypeScript
PostgreSQL
Stripe
AWS

Minutes
Onboarding, down from weeks
Self-serve
Plan upgrades and metering
RLS
Enforced tenant isolation

AI & Analytics

Grounded analytics copilot

The challenge: An analytics vendor wanted a natural-language layer over customer data, but early prototypes hallucinated numbers — unacceptable for a product finance teams rely on.
What we did: We built a retrieval layer over the semantic model rather than raw tables, constrained generation to validated queries, and shipped an evaluation harness that gates every prompt and model change in CI.

Claude API
Python
dbt
pgvector
Next.js

Cited
Every figure traced to a query
CI-gated
Evals block regressions
Sub-second
Median cached response

Questions

Answers before you ask

The six things prospective clients raise most often. Anything else, ask us directly — you will get a straight answer.

How quickly can a team start?