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CUSTOM SOFTWARESaaS · Platforms · Internal Tools · APIs

Production-grade software, engineered around your business.

We design and build custom SaaS platforms, internal tools, dashboards, APIs, and workflow systems on modern, production-ready architecture — fixed scope, full code ownership.

40+ applications shipped
99.9% uptime
Fixed scope projects
Full code ownership
tenant.service.tsschema.prismaapi.ts
main
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// Multi-tenant ledger — RLS by tenant_id
export async function createInvoice(
  ctx: Ctx, input: InvoiceDraft
) {
  await requireScope(ctx, "invoices:write");

  return tx(async (db) => {
    const id = ulid();
    await db.insert(invoices, {
      id, tenant_id: ctx.tenant,
    });
    await queue.enqueue("invoice.created", { id });
    return { id, status: "draft" };
  });
}
deploy.sh✓ LIVE
$ sw deploy --env prod
→ building containers...
✓ web · 18.2s
✓ api · 22.1s
→ migrating database...
✓ 4 migrations applied
✓ Deployed to prod in 1m 02s
https://app.acme.io · ✓ healthy
System status
last 24h
99.98%
uptime · 3 services
APPLICATIONS DELIVERED↑ last 24 months
40+
Production systems shipped
UPTIME · 12 MO ROLLING↑ 3 nines
99.9%
Across all hosted client systems
FASTEST MVP SHIP
3 wks
From kickoff to production
Week 1
100%
Week 2
95%
Week 3
65%
✓ MVP ships week 3
CODE OWNERSHIPMIT · YOURS
100%
Repo, infra, secrets — all yours
github.com/yourco/platform
Your AWS · your domain
Full handover docs + ADRs
Your team trained & ramped
What we build

The systems serious businesses actually run on.

Custom-engineered software — not configured templates. Every system below is built to operate at production load from day one.

Next.jstRPC
SaaS Platforms
Multi-tenant SaaS with billing, RBAC, audit logs, and clean APIs — production from week one.
app.saas.io
12k
84%
₹4L
Multi-tenantBillingPublic API
ReactPostgres
Internal Dashboards
Operations dashboards your team will actually use — fast, live, tied directly to your data.
Operations▪ LIVE
Orders
1,284
Revenue
₹48k
RealtimeRolesExports
Bespoke
CRM & ERP Systems
Pipelines, inventory, and back-office workflows engineered around your exact business rules.
Pipeline · Q3
New
Qual
Demo
Won
PipelineInventoryReporting
NodeFastify
APIs & Integrations
REST and GraphQL services with auth, rate-limits, idempotency, and observability baked in.
POST/v1/orders
GET/v1/users
PUT/v1/items
RESTGraphQLWebhooks
OpenAIVector
AI Automation
Production agents and RAG pipelines wired into your tools — with eval harnesses and cost ceilings.
Agent · Triage
Classify ticket
Route to specialist
Auto-draft reply
Escalate if SLA
AgentsRAGEvals
TemporalBullMQ
Workflow Systems
Durable, retry-safe, observable queues — built for the operations your business runs on.
TABM
QueuesRetriesObservability
Engineering capabilities

Every primitive a serious platform needs, shipped properly.

We treat auth, billing, queues, and observability as first-class systems — not afterthoughts bolted on the day before launch.

Authentication & SSO
Email, magic links, OAuth, SAML, MFA — secure from day one.
OAuth · SAML
RBAC & permissions
Role-based access with row-level security and a full audit trail.
RLS
Billing systems
Razorpay, Stripe — subscriptions, metering, invoicing, dunning.
Razorpay
Multi-tenancy
True tenant isolation with per-tenant config at scale.
Postgres RLS
Realtime systems
WebSockets and server-sent events — without the memory leaks.
WS · SSE
API infrastructure
REST and GraphQL with rate limits, idempotency, and OpenAPI docs.
OpenAPI
ARCHITECTURE · acme-platformhealthy
Web app
Mobile
Webhook
API Gateway
auth · rbac · rl
Core API
Realtime
AI service
Workers
Postgres
Redis
S3
p95 latency
142ms
throughput
12k rps
error rate
0.02%
Every project ships with an ADR log
Architecture decisions, trade-offs, and runbooks — written down so your next hire can read why, not just what.
How we engineer

A process built around shipping, not sliding decks.

Five operational stages, each with deliverables you can hold in your hand. No mystery phases, no surprise scopes.

STEP 011–2 weeks
Discovery
We map the real problem — not the symptoms. Stakeholder interviews, systems audit, and a signed brief before a line of code is written.
Deliverables
Stakeholder interviews
Systems audit
Problem brief & scope
STEP 022 weeks
Architecture & Design
Data model, API contract, infra topology, and Figma wireframes — reviewed by your team before development starts.
Deliverables
System architecture
Data model + ERD
Hi-fi design system
STEP 03Sprint cadence
Iterative Development
Two-week sprints. You see working, staging-deployed software every Friday — not a status report.
Deliverables
Friday demos
Live staging branch
Sprint changelogs
STEP 042 weeks
QA & Security
Unit, integration, and end-to-end tests. OWASP audit, pen-test, and load testing before production.
Deliverables
Test suite (>80% cov.)
Security audit
Load + chaos tests
STEP 05Ongoing
Launch & Handover
Production cutover, runbooks, and 90-day support. Full code and infra ownership transferred to you.
Deliverables
Production cutover
Runbooks + docs
90-day support
You're in the loop, all the time
Slack channel · weekly demos · always-on changelog
Mon · standup·Wed · midweek demo·Fri · ship + retro
Engineering environment

The stack we actually ship in production.

No vendor lock-in tricks, no hot-new-thing experiments on your dime. The tools below have shipped real revenue.

~/sw247/stack.json
stack · v2026.05
Categories
Frontend
Type-safe, fast, accessible. Built on the same primitives Vercel and Linear use.
6 tools
NX
Next.js
Re
React
TS
TypeScript
TW
Tailwind CSS
Rx
Radix UI
TQ
TanStack
Stack rationale included. Every project ships with a written justification for each choice — why this database, this queue, this hosting target.
Why clients choose us

The boring engineering decisions other agencies skip.

Custom software is a long-term commitment for both sides. We structure every engagement so the system you're left with outlasts our involvement.

If we overrun, we absorb it.
Fixed-scope projects ship on the date we agreed — or we keep working at our cost until they do.
Operational dimensionSolution World 24×7Typical agency
Code ownership100% yours · MIT licenceVendor lock-in
Pricing modelFixed scope, fixed priceT&M billing, scope creep
Architecture reviewEngineered before codeBuilt as you go
Security postureOWASP + pen-test on every releaseAfter-the-fact patching
Sprint demosLive, every SaturdayMonthly status email
DocumentationADRs, runbooks, handoverSparse README
Senior involvement100% expert engineersJuniors on your account
Production support90 days includedOut of scope
Frequently asked

The questions every CTO asks us first.

Honest answers — including the ones we wish more agencies would give.

Still have questions?
Email us — we reply within one business day.
info@solutionworld247.com

A focused internal tool or MVP starts from ₹1,20,000. SaaS platforms with multi-tenancy, billing, and admin systems typically run ₹3–8L depending on feature depth. We produce a detailed fixed-scope estimate after a discovery call — no ballpark figures without understanding your requirements.

A well-scoped MVP typically takes 4–8 weeks. A full SaaS product with multi-tenancy, billing, and integrations takes 10–16 weeks. Timeline depends directly on scope clarity — the more detailed your requirements at kickoff, the faster we move.

Yes, unconditionally. The code, repository, all infrastructure credentials, and all intellectual property are transferred to you on final payment. We do not retain licences, hidden forks, or future claims.

Absolutely. About half our work is on existing codebases — adding features, modernizing the data layer, replacing a legacy module, or migrating off a no-code platform you've outgrown. We start with a paid code audit before quoting feature work.

Minor changes within agreed scope are absorbed. Meaningful additions are estimated, approved, and added to the backlog with a revised timeline. We do not charge retroactively or surprise you with invoices.

The first 90 days of operational support are included in every fixed-scope engagement — incident response, performance tuning, and small post-launch changes. About 70% of clients renew into a continuous engagement after that.

Let's build software that actually scales.

30-minute discovery call. We'll review your requirements, architecture needs, and business goals — then tell you honestly whether we're the right team to build it.

30 minutesNDA-friendlyNo obligation
Next availableMay–Jun 2026
Wed
28
10:00 AM IST
30 min · with Founding team
PICK
Thu
29
3:30 PM IST
30 min · with Founding team
Tue
03
11:00 AM IST
30 min · with Founding team
Calls are with founding team, not sales reps
Custom software development serving:
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