Here are well-regarded software development companies in Sri Lanka (good for product engineering, enterprise software, outsourcing/delivery centres, and niche vertical platforms). I’ve listed each company with what they’re known for and a short note on fit — links to sources are cited so you can review details.

Top picks

• WSO2 — Open-source middleware, API management, identity and integration platform; strong engineering bench and global customers (enterprise integration, API-first architectures). (WSO2.com)

• Virtusa — Large global digital engineering and IT services firm with major delivery centres in Colombo; strong in digital transformation, cloud, data/AI, enterprise apps and industry verticals (banking, insurance, telecom). Good when you need scale and domain expertise. (Virtusa.com)

• MillenniumIT ESP (MIT ESP) — Enterprise systems, exchange/trading platforms, systems integration, managed services and critical infrastructure software. Good for large enterprise/finance/infra projects. (en.wikipedia.org)

• 99X Technology — Product engineering specialist (Agile, long track record building commercial software products for ISVs, strong culture and engineering practices). Best for SaaS/product development and high-quality engineering teams. (srilankabusiness.com)

• CodeGen International — Travel and hospitality technology specialist (reservation systems, distribution, booking platforms). Choose for travel/OTA/booking domain projects. (srilankabusiness.com)

• Calcey — Software product engineering and R&D centre (product development for startups and mid‑sized companies); boutique engineering teams focused on quality and long‑term partnerships. Good for outsourced product teams. (Calcey.com)

• hSenid — HR/HRIS and telco/mobile platforms plus offshore development services; proven in HR SaaS and enterprise solutions. Useful when you need HR systems or experienced outsourcing partners. (hsenid.com)

• John Keells IT (JKIT) — IT arm of John Keells Holdings with enterprise solutions (aviation, hospitality) and offshore delivery capabilities; suitable when you want a locally established corporate partner. (en.wikipedia.org)

Other reputable Sri Lanka/Colombo-based firms to consider

• Smaller/boutique product houses and engineering teams such as various local consultancies and R&D centres (many specialised shops exist across fintech, healthtech, travel tech and embedded systems). For niche needs you may prefer a smaller team with deep domain focus. (See company directories and profiles above for examples.) (srilankabusiness.com)

How to pick the right partner

• Define scope: product vs. project vs. managed team; expected duration, compliance or performance needs (SLA, uptime, security).
• Match domain/stack: pick companies with proven work in your vertical (e.g., travel = CodeGen; middleware/APIs = WSO2; product engineering = 99x/Calcey).
• Check references & delivery model: ask for case studies, references, engineers’ profiles, and engagement model (time & material, fixed price, dedicated team).
• Run a short technical evaluation: pilot sprint, architecture review, or paid PoC to test capabilities before scaling.

If you want, I can:

• Narrow this to companies that match a specific tech stack (e.g., Java, .NET, Node/Python) or industry (banking, travel, health).
• Prepare a short RFP template you can send to 3–5 shortlisted Sri Lankan vendors.

Which would you like next?