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LoneSock Consultancy · A KaritKarma company
We build enterprise systems. You own the code.
Custom software development at $20/hr in Go, .NET 10, Rust and Next.js. Backed by a parent company that runs 22 production systems in Bangladesh, with source code delivery on every engagement and our own Tier-3 data center.
Our valued clients
Practice
Six areas of practice, one engineering team.
You hire the same principal engineer who designs the architecture, and you draw on a 22-product platform out of the box.
Custom Software Development
Full-stack enterprise systems. Microservices, APIs, web apps, mobile apps. Go, .NET 10, Rust, Next.js, React Native.
AI & Machine Learning
Voice AI (sub-500ms with Groq), NLP, fraud detection (ML scoring), recommendation engines, autonomous agents, computer vision (CLIP).
E-Commerce & ERP
BizRP-powered or custom-built. Full e-commerce with POS, inventory, accounting. ERPNext-level business logic in Go microservices.
Communications & CPaaS
BitsPath-powered. Email, SMS, WhatsApp, push, voice PBX. Carrier-grade Rust voice platform with SIGTRAN/SS7.
FinTech & Payment Systems
Payment gateways, escrow (Hold.bd + tier-1 commercial bank partner), fraud detection (Aegis), sovereign payment networks (IntraPay).
Infrastructure & DevOps
Own Tier-3 data center (APNIC member, AS 64005, BGP peering). Docker/k8s, CI/CD, monitoring, cloud migration.
Selected work
Selected engagements, status stated as it stands.
Live systems and active builds, each marked for what it is. Clients are named only with their authorisation.
National political organisation (sensitive, identity withheld) · Governance / Enterprise
Constitutional Governance Platform
Digital governance platform sized for a national membership organisation. Constitutional rules engine, eight-tier hierarchy, mass communications.
Built by LoneSock, productised by KaritKarma · Telecom / Infrastructure
ISPChamp
Complete OSS/BSS platform for ISPs in Bangladesh. RADIUS-driven subscriber control, MikroTik integration, bKash and Nagad billing.
Why LoneSock
You own everything we build. Clean APIs, documented exports, no proprietary lock-in. You can leave. That conviction is why clients stay.
- Own Tier-3 data center
- APNIC member, AS 64005, BGP peering. We operate real infrastructure rather than renting cloud capacity. Your data stays where you want it.
- $20/hr, no compromises
- Bangladesh cost advantage with Silicon Valley engineering depth. The same principal engineer for 26 years. No bait-and-switch with junior developers.
- Backed by 22 production systems
- Our parent company runs production systems in Bangladesh spanning identity, payments, ERP, communications, AI and media. Every pattern we apply has already been validated in production.
- Full-stack: Go, .NET, Rust, Next.js
- Go for high-performance APIs. .NET for enterprise systems. Rust for systems programming. Next.js for modern frontends.
Engagement
Four ways to engage.
We recommend a model after discovery rather than forcing one up front.
- Time and materials
- Flexible scope, billed by actual effort. Silicon Valley quality at Bangladesh cost. Scale as needed.
- $20 per hour
- Fixed price
- Defined scope, fixed budget, milestone payments. Clear deliverables with predictable costs.
- Milestone based
- Retainer and AMC
- Dedicated capacity reserved for ongoing needs, from the team that built the system.
- 20% of build cost per year
- CTO-as-a-Service
- Architecture reviews, technology strategy and team mentoring.
- Fractional leadership
Questions
Common questions about working with us.
Not seeing yours? Write to [email protected] and we will reply within one business day.
What is LoneSock?
LoneSock is a custom software consultancy based in Dhaka, Bangladesh, and the services arm of KaritKarma Limited. We build enterprise systems at $20/hour with full source code delivery. Our stack is Go, .NET 10, Rust, and Next.js. We are backed by KaritKarma's 26-year engineering history and its ecosystem of 22 production products.
How much do you charge?
Our headline Time and Materials rate is $20 per hour. We also offer fixed-price milestone engagements, annual retainers at 20% of build cost for maintenance, and CTO-as-a-Service for fractional technical leadership.
Who owns the code we pay you to build?
You do. Source code delivery is standard on every LoneSock engagement. We hand over the full repository, infrastructure definitions, deployment scripts, and documentation. There are no per-seat licenses, no vendor lock-in, and no hidden IP clauses.
Do you sign NDAs?
Yes. We sign mutual NDAs before any deep technical discussion. We work with banks, government agencies, and regulated industries, so confidentiality is part of our baseline operating model.
What is a typical engagement length?
Discovery is 2 to 4 weeks, architecture is 1 to 2 weeks, and build is typically 8 to 16 weeks for a first working release. Most engagements continue into optional retainer or AMC support from the same team that built the system.
Do you do fixed-price or time-and-materials?
Both. Fixed-price with milestone payments works best for well-defined projects with stable requirements. Time and Materials at $20/hour works best for evolving projects and ongoing development. We recommend a model after discovery rather than forcing one up front.
Where is your team based?
Dhaka, Bangladesh. We operate from KaritKarma's own Tier-3 data center and are APNIC members with our own ASN (AS 64005). Our team delivers across Bangladesh, the UK, UAE, and the US.
Do we have to use KaritKarma products like Wenme or BitsPath?
No. We present our own products (Wenme for auth, Darwan for RBAC, BitsPath for CPaaS, BizRP for ERP) alongside competitors like Auth0, Casbin, Twilio, and SSLCommerz. You pick what fits your project. There is no forced stack.
Can you work as a subcontractor for our agency?
Yes. LoneSock regularly subcontracts for agencies and other consultancies that need senior engineering capacity. We can operate white-label under your brand or as an acknowledged partner.
Discovery
Book a 30-minute discovery call.
No sales deck. You will speak directly with engineering leadership. We sign mutual NDAs before any deep technical discussion.
- Principal
- Lutfar Rahman (Nirjhar), MD & CEO
- [email protected]
- Office
- Dhaka, Bangladesh