REAL-TIME AUCTION SOFTWARE · OUR DEEPEST PRACTICE · SINCE OCTOBER 2010
Six auction formats. 40+ production deployments. 11+ countries. From penny and lowest-unique-bid to price-reveal, Dutch, eBay-style, and reverse-procurement — we have shipped every major bidding pattern at production load since 2010. Real bidders, real money, real spikes in the final 30 seconds of every auction. Listed on Capterra at 4.8★ across 25 verified client reviews, including verified auction-owner buyers.
48-hour reply · NDA on request · Your first call is with an auction engineer, not a sales rep
FORMATS WE SHIP
Each format is a distinct revenue model, fraud surface, and engagement loop — not a theme on top of one engine. Tap any format for the deep-dive: full feature list, operator panel, tech stack, and reference deployments.
A strategy bidding game: every bid costs a small non-refundable fee, nudges the price up one increment, and extends the timer. The last bidder when the clock hits zero wins — often at a fraction of retail. We build the full economic engine: bid-fee wallet, master auto-bidder, time extensions, bonus auctions, and the operator control panel behind it.
Best for: consumer entertainment auctions with bid-fee revenue.
The winner is whoever places the lowest bid that nobody else has matched. The entire format lives or dies on bid integrity — so we enforce uniqueness atomically at the database, timestamp every bid server-side, and ship anti-collusion logic plus bot-detection so operators can trust every single result.
Best for: gamified, prize-based B2C auctions.
The inverse of lowest-unique: the highest bid nobody else matched wins, usually under a ceiling set below retail value. Same airtight integrity model — atomic uniqueness, server-authoritative timing, exportable audit logs — tuned for the high-engagement loops that drive repeat bidding.
Best for: gift-card, electronics & small-ticket merchandise.
Gamified price discovery. Players pay to reveal the live price and commit when it feels right; Dutch auctions descend continuously until someone buys. We engineer the reveal interaction for sub-second response, with operator-configurable price curves, multi-currency, and optional live video streaming for high-trust categories.
Best for: gamified discovery & live descending-price sales.
A full multi-seller, multi-category auction marketplace under one operator. Proxy bidding (set a max, the system bids for you), auction extensions on late bids, watchlists, saved searches, and seller reputation — SEO-friendly and built to scale to thousands of sellers and millions of listings.
Best for: multi-seller B2B or B2C marketplaces.
Buyers post requirements; suppliers compete by bidding the price down in real time. Built for enterprise procurement and public-sector tenders — multi-tenant SaaS, tender-window lifecycle, weighted multi-criteria evaluation across price, lead time and quality, and audit-grade event logs for compliance.
Best for: enterprise procurement & public tenders.
THE PROBLEM
Auction platforms fail in three predictable ways. They fail under bid concurrency — five thousand users hitting “bid” in the final ten seconds of a penny auction, and the platform stalls or double-counts. They fail under fraud pressure — auto-bidders, sniping bots, and credit-buying rings exploit gaps in the auction logic and operators lose the trust of their paying users.
And they fail under operator complexity. What looked simple in the demo (“just penny auctions”) turns into bid extensions, bonus auctions, 24-hour auctions, master auto-bid, CSV product uploads, membership tiers, refund logic, multi-currency, KYC, and tax reporting. The auction engine is the easy part. Everything around it is where most builds die.
We’ve spent 15 years building the everything-around-it. We started shipping penny auctions in 2010, before most current auction platforms existed. Our portfolio spans six different auction formats across five regulatory environments. If you’ve imagined an auction edge case, we’ve already shipped a fix for it on a production system somewhere in the world.
OUR APPROACH
We start with your auction format and your unit economics. Penny (bid-fee model)? Reverse (lowest-unique-bid, prize-based)? Price-reveal (gamified discovery)? Each format has fundamentally different revenue mechanics, fraud surfaces, and engagement loops. We map yours before we touch architecture. Deliverable: a written format spec, fraud-surface analysis, and an infrastructure cost estimate at your target user load.
We architect for your specific concurrency profile. A penny auction with 200 simultaneous final-second bidders has nothing in common with a B2B reverse auction with 50 buyers per tender. Architecture is custom, not templated. Deliverable: system architecture, data model, real-time event flow, integration plan for payments, SMS/email, KYC, and admin tools.
Two-week sprints. End-of-sprint demos on a live staging environment. You see real bidding behaviour every two weeks, not a slide deck. We ship the auction engine first, the operator admin panel second, and the user-facing site third — because the order matters when you’re debugging concurrency. Communication: Slack channel, weekly written status, video demo every sprint.
We don’t disappear after go-live. Every auction client we’ve shipped is still operational — most remain on a retainer for feature work, performance tuning, or fraud-pattern updates. Deliverable: production deployment, monitoring/alerting setup, runbook for operators, and a 90-day production warranty period.
CASE STUDY DEEP-DIVE
A European enterprise client needed a digital negotiation platform that multiple buyer organizations could each run as their own isolated tenant — same software, separate data, separate branding, separate reporting per jurisdiction. Their customers run live competitive procurement events with reverse, forward and hybrid bidding across the same platform. Existing off-the-shelf tools required either one installation per buyer (expensive, unmaintainable) or shared tenancy with weak data isolation. They needed a real multi-tenant SaaS, built for the specific event-stream behaviour of live negotiation across multiple bidding formats, with audit-grade event logs that would survive a regulatory review.
A Node.js + WebSocket multi-tenant SaaS with tenant-isolated databases, real-time bid streaming, automated event lifecycle (publish → live bidding window → close → award → audit export), per-tenant branding and language packs, and full event-sourced audit logs. The same engine drives reverse, forward, and hybrid bidding formats — buyers post procurement requirements; pre-qualified suppliers submit live competitive quotes within the bidding window; the system handles tie-breakers, withdrawal rules, weighted multi-factor evaluation, and award notifications automatically.
Multi-tenant SaaS for regulated sectors is 30% engine, 70% the audit trail. Anyone can build a reverse auction. The defensible moat is the immutable event log, the per-tenant data isolation, and the operator-facing audit export tooling. We over-invested in those three from day one and it has paid back in zero compliance incidents across years of operation. DiNePa is now our most-referenced deployment for any client evaluating multi-tenant SaaS architecture — auction or otherwise.
TECH STACK
HOW WE ENGAGE
2 weeks · fixed fee
Best when you have an auction concept but no spec. We map your format, unit economics, fraud surfaces, regulatory requirements, and target user load. Deliverable: a written spec, architecture sketch, and a fixed-fee quote for the build phase. Fee is credited toward the build phase if you proceed.
8–16 weeks · fixed price
Best when you have a spec and want a fixed budget. We deliver a production-ready auction platform with operator admin, payment integration, and a 90-day production warranty. Two-week sprints, end-of-sprint demos, weekly written status updates. The engineer you meet in discovery is the engineer who ships your code.
Monthly · time-and-materials
Best after launch. Feature work, performance tuning, fraud-pattern updates, operator support. Every auction client we’ve shipped remains on some level of retainer — auction platforms are living systems, not one-time builds. Hours scale to your roadmap.
Standard contracts: MSA + SOW templates available on request before our first call. Mutual NDA on request, signed before discovery. Payment terms: 30% on signature, then milestone-based.
QUESTIONS
8–16 weeks for a production-ready MVP of a single auction format, depending on payment integrations, KYC requirements, and operator panel complexity. Multi-format platforms (e.g. penny + lowest-unique-bid in one operator account) typically take 4–6 months.
We quote firm numbers after a 30-minute call where we understand your format and scope. Pricing model: fixed-fee discovery sprint, fixed-price MVP build, time-and-materials retainer post-launch. We’ll send a range during our first conversation and a fixed quote after discovery.
Yes for the eBay-style marketplace script (open-source, fully customizable) and the penny auction core. For lowest-unique-bid, price-reveal, and Dutch auction, we build from spec — these formats are too unique per operator to white-label cleanly.
We integrate the payment provider (Stripe, PayPal, PayTM, CCAvenue, or regional gateway). You hold the merchant account directly — we never custody client funds. Bitcoin gateway available on request.
Probably yes — our reference deployments handle simultaneous-user counts in the thousands. We size the infrastructure during discovery so the answer is specific to your load profile. We don’t under-spec to win a quote.
We’ve built six formats publicly listed. We’ve also shipped variants and hybrids privately. If you can describe the bidding logic in two paragraphs, we can probably ship it. We’ll tell you in the discovery call if we can’t.
Yes — Bienbid (French), EodBox (multilingual, multi-currency), DiNePa (per-tenant EU language packs), TopEncheres (French), prezzocorrente (Italian), SubastasGamer (Spanish). Multi-language and multi-currency are standard.
We’re listed on Capterra at 4.8★ across 25 verified client reviews, with verified reviewers across real estate, automotive, sports, non-profit, marketing, and auction industries. Read the reviews on Capterra →
Same engineering team. Same auction patterns. Your platform, with a foundation that’s already running in production deployments worldwide — from penny to reverse to Dutch.
Need a second opinion on existing auction software? +977 9851038796 — Roshan Subedi, Founder & MD · architecture audits reviewed directly
