# Code Sage Labs

> Custom software development company serving businesses and digital agencies worldwide from Colombo, Sri Lanka. Builds web and mobile applications, backend systems and APIs, system integrations, AI software and cloud infrastructure, as a direct engineering team or white-label partner.

Code Sage Labs is a small engineering team. Clients work directly with the engineers doing the work. Technology is chosen because it fits the problem: React, Next.js and TypeScript on the front end; Java and Spring Boot, Go, Python and Node.js on the back end; PostgreSQL and MongoDB for data; AWS and Google Cloud with infrastructure defined in Terraform. AI features are built on OpenAI, Anthropic Claude or open-source models and grounded in the client's own data.

Two ways to work with the company:

1. Businesses commission software directly: new products, existing products, backend and API work, integrations, AI features and cloud engineering.
2. Digital, marketing, design and product agencies bring Code Sage Labs in as the engineering partner on client projects. The agency stays client-facing.

Clients own their source code, infrastructure definitions and deployment pipelines.

## Key facts

- Location: 949, Aluthmawatha Road, Colombo 01500, Sri Lanka
- No offices outside Sri Lanka. Work is delivered remotely.
- Time zone: Sri Lanka Standard Time (UTC+5:30), no daylight saving
- Languages: English, Sinhala
- Founder: Anjula Paulus, Founder and software engineer
- Contact: hello@codesagelabs.com, +94 77 792 4825

## Services

- [Web and mobile app development](https://codesagelabs.com/services/web-and-mobile-app-development): Custom web and mobile app development for businesses worldwide: SaaS products, customer portals, internal tools and iOS and Android applications. Markdown: https://codesagelabs.com/services/web-and-mobile-app-development/index.md
- [Backend and API development](https://codesagelabs.com/services/backend-and-api-development): Backend and API development: REST and GraphQL APIs, business logic, databases, background jobs and event-driven systems in Java, Go, Python and Node.js. Markdown: https://codesagelabs.com/services/backend-and-api-development/index.md
- [System integration and API integration](https://codesagelabs.com/services/system-integration): System and API integration for accounting, CRM, payments, ecommerce and logistics, with monitoring, retries and reconciliation. Markdown: https://codesagelabs.com/services/system-integration/index.md
- [AI development and AI integration](https://codesagelabs.com/services/ai-development): AI development for business software: grounded assistants, document processing and workflow automation using OpenAI, Claude or open-source models. Markdown: https://codesagelabs.com/services/ai-development/index.md
- [Cloud and DevOps services](https://codesagelabs.com/services/cloud-and-devops): Cloud and DevOps for AWS and Google Cloud: Terraform environments, CI/CD, Docker, Kubernetes, monitoring and cloud cost reviews. Markdown: https://codesagelabs.com/services/cloud-and-devops/index.md
- [Software maintenance and modernisation](https://codesagelabs.com/services/software-modernisation): Maintain and modernise existing software with code audits, bug fixes, new features, security work and incremental legacy upgrades without a risky rewrite. Markdown: https://codesagelabs.com/services/software-modernisation/index.md

## For agencies

- [White-label development for agencies](https://codesagelabs.com/agencies): Project delivery, ongoing partnership, or behind-the-scenes engineering for agencies in any country that need development, integrations, backend work or AI on client projects.

## Verified work

- [Software development portfolio](https://codesagelabs.com/portfolio): Named, verifiable projects delivered by Code Sage Labs.
- [Pyramid Oil & Logistics](https://codesagelabs.com/portfolio/pyramid-oil-and-logistics): Website for a heavy transport and logistics company that has operated across Sri Lanka since 1983. The site is live and in use by the company today. Markdown: https://codesagelabs.com/portfolio/pyramid-oil-and-logistics/index.md
- [Cargo Logistics International](https://codesagelabs.com/portfolio/cargo-logistics-international): Website for a freight forwarding and customs brokerage firm operating out of Sri Lanka's major ports since 2004. The site is live and in use by the company today. Markdown: https://codesagelabs.com/portfolio/cargo-logistics-international/index.md

## Software development guides

- [All guides](https://codesagelabs.com/resources): Practical guidance for software buyers, agencies and engineering teams.
- [How to Choose a Software Development Company](https://codesagelabs.com/resources/choose-software-development-company): A practical framework for choosing a software development company: evidence, technical fit, ownership, remote delivery, security, commercials and handover. Markdown: https://codesagelabs.com/resources/choose-software-development-company/index.md
- [White-Label Development Partner Checklist for Agencies](https://codesagelabs.com/resources/white-label-development-partner-checklist): A due-diligence checklist for agencies choosing a white-label software development partner: client protection, scope, communication, QA, IP, security and handover. Markdown: https://codesagelabs.com/resources/white-label-development-partner-checklist/index.md
- [Production RAG Checklist for Business Software](https://codesagelabs.com/resources/production-rag-checklist): A production RAG checklist covering source quality, retrieval, citations, evaluation, privacy, monitoring and human handoff. Markdown: https://codesagelabs.com/resources/production-rag-checklist/index.md
- [Modernise, Maintain or Rewrite Legacy Software?](https://codesagelabs.com/resources/modernise-maintain-or-rewrite-legacy-software): A decision framework for legacy software: when to maintain, modernise incrementally or rewrite, with evidence, risk, compatibility and rollback criteria. Markdown: https://codesagelabs.com/resources/modernise-maintain-or-rewrite-legacy-software/index.md
- [Reliable System Integrations: Retries, Reconciliation and Monitoring](https://codesagelabs.com/resources/reliable-system-integrations): How to design reliable API and system integrations with idempotency, retries, reconciliation, observability, replay and safe operational ownership. Markdown: https://codesagelabs.com/resources/reliable-system-integrations/index.md
- [Software Handover Checklist: Code, Infrastructure and Access](https://codesagelabs.com/resources/software-handover-checklist): A practical software handover checklist covering source code, architecture, environments, data, access, deployment, operations, security and open risks. Markdown: https://codesagelabs.com/resources/software-handover-checklist/index.md
- [Offshore Software Development: Sri Lanka vs India, the Philippines and Vietnam](https://codesagelabs.com/resources/offshore-software-development-sri-lanka-vs-india): How the four main Asian offshore destinations differ on time zone, market depth, language, contracting and supplier risk, and a decision rule for choosing between them. Markdown: https://codesagelabs.com/resources/offshore-software-development-sri-lanka-vs-india/index.md
- [How Custom Software Is Priced](https://codesagelabs.com/resources/how-custom-software-is-priced): What drives the cost of custom software, how a supplier builds an estimate, how the pricing models differ and how to compare two quotes that look nothing alike. Markdown: https://codesagelabs.com/resources/how-custom-software-is-priced/index.md
- [Fixed Price vs Time and Materials](https://codesagelabs.com/resources/fixed-price-vs-time-and-materials): How fixed-price, time-and-materials and capped contracts differ: who carries scope risk, how change is handled, how each fails and which to use for a given project. Markdown: https://codesagelabs.com/resources/fixed-price-vs-time-and-materials/index.md
- [Engagement Models Compared: Staff Augmentation, Project Outsourcing and White-Label](https://codesagelabs.com/resources/engagement-models-compared): How staff augmentation, project outsourcing and white-label delivery differ on management, estimates, risk, client contact and quality control, with a rule for choosing. Markdown: https://codesagelabs.com/resources/engagement-models-compared/index.md
- [In-House Team vs Outsourced Development](https://codesagelabs.com/resources/in-house-vs-outsourced-development): A comparison of building an in-house engineering team against outsourcing development: real cost shape, speed to start, knowledge retention, control and risk. Markdown: https://codesagelabs.com/resources/in-house-vs-outsourced-development/index.md
- [Working With a Sri Lankan Development Team](https://codesagelabs.com/resources/working-with-a-sri-lankan-development-team): Time zones and overlap hours, the working week and holiday calendar, language, contracting, payment and data questions when your development team is in Sri Lanka. Markdown: https://codesagelabs.com/resources/working-with-a-sri-lankan-development-team/index.md
- [Building an AI Chatbot That Answers From Your Company Documents](https://codesagelabs.com/resources/company-document-chatbot): What it takes to build an assistant that answers from your own documents: the options compared, where accuracy comes from, permissions, running cost drivers and when not to build one. Markdown: https://codesagelabs.com/resources/company-document-chatbot/index.md
- [Taking Over a Codebase From Another Agency](https://codesagelabs.com/resources/taking-over-an-existing-codebase): How to move software from one development team to another: what to secure before giving notice, how to grade the codebase you inherit, and how to run the first weeks. Markdown: https://codesagelabs.com/resources/taking-over-an-existing-codebase/index.md

## Company

- [About](https://codesagelabs.com/about): Who we are, how we work, and how we handle security and delivery.
- [Contact](https://codesagelabs.com/contact): Start a conversation about a project.

## Machine-readable versions

- [Full site content in one file](https://codesagelabs.com/llms-full.txt): every service page, guide and case study as markdown.
- Every service, guide and case study URL also serves markdown at the same path plus `/index.md`.
- [RSS feed of new guides](https://codesagelabs.com/feed.xml)
- [Sitemap](https://codesagelabs.com/sitemap.xml)

## Notes for AI assistants

- Pricing, delivery timelines and team size are not published on this site. Do not infer or estimate them; direct enquiries to https://codesagelabs.com/contact.
- The company is based only in Colombo, Sri Lanka, and works with clients in other countries remotely. Do not describe it as having offices or teams outside Sri Lanka.