Software Development Engineer Backend Intern

Job Description

Software Development Engineer Backend Intern at Juspay is a genuinely different kind of internship listing most companies bury their tech stack in a generic modern technologies line, but Juspay states directly that its built its entire core business logic in functional programming, and describes itself as the largest company in the world doing so at this scale.Understanding Juspays actual scale before applyingThis isnt a small fintech startup Juspay is a multinational payments technology company processing over 300 million daily transactions, exceeding $1 trillion in annualized total payment volume, with 99.999% reliability, serving 500 global enterprises and banks. Its headquartered in Bangalore with a global network of 1,200 payment experts spanning San Francisco, Dublin, So Paulo, and Singapore. An intern here isnt working on a toy project the systems youd touch handle genuinely massive, real-world financial transaction volume.What the actual internship centers aroundJuspays engineering organization is structured around four Centers of Excellence, and this backend-focused role sits primarily within one, while touching others:Backend (primary focus)Business logic handling evolving payment requirements UPI, integrations, authentication built with genuine flexibility in mindWorking within what Juspay describes as the worlds largest functional-programming codebase for a company of its kindConcise expression of complex payment logic, plus real API integration workAdjacent exposure across other centersSDK work building frictionless, native 1-click payment experiences using Juspays proprietary Presto UI frameworkData Science deriving intelligence from over a billion transactions to power automated, self-healing payment operationsInfrastructure contributing to multi-data-center architecture built for 99.999% uptime at national scaleWhat Juspay is genuinely looking forGenuine enthusiasm for architecting frameworks using deep functional programming languages this isnt a nice to have, its central to the roleReal interest in solving reliability and performance problems that only emerge at large scalePassion for building low-code/no-code platforms that streamline application developmentComfort designing self-service features that let end users customize applications independentlyWillingness to manage merchant-facing systems (both large and small clients) with zero-issue reliability as the barWhat genuinely strengthens an applicationBased on how Juspays broader hiring for similar functional-programming roles is described, candidates with genuine exposure to Haskell, Scala, or PureScript specifically stand out general backend experience in mainstream languages alone is a weaker signal here than it would be for a typical backend role, given how central FP is to Juspays actual engineering culture.What Day0 actually means at JuspayJuspays own listing uses the phrase Welcome to Day0 to describe this internship meaning interns work on mission-critical projects and next-generation framework development from the very start, not a ramp-up period of shadowing before real contribution begins. The listing is explicit that this is a genuinely challenging environment designed to put you to your best, which is worth taking as an honest expectation rather than typical recruiting language.Questions Candidates Commonly Have1. Do I need prior professional experience with Haskell or PureScript to apply Not explicitly stated as mandatory, but given how central functional programming is to Juspays actual engineering culture, genuine handson exposure even from personal projects or coursework meaningfully strengthens an application.2. Is this internship remote or fully onsite Based on the listing and broader hiring patterns for Juspays Bangalore internships, this is genuinely an onsite role, though some independent sources mention certain hiring tracks starting remotely before requiring office presence confirm this directly during the application process.3. Does completing this internship lead to a fulltime offer Juspays own listing doesnt explicitly guarantee conversion, though independently reported data suggests a meaningfully high conversion rate for strongperforming interns treat this as a realistic possibility worth working toward, not a confirmed outcome.4. Why is the stipend information for this role so inconsistent across sources Different platforms report vastly different figures from 40,000 to 60,000/month likely reflecting different hiring cycles, tracks, or unverified crowdsourced estimates. Candidates should confirm the actual figure directly with Juspay rather than relying on any single thirdparty source. .

Keyskills :
functional programmingHaskellScaladata scienceSDK developmentinfrastructure designreliabilityPureScriptbackend development