Headline

Software Engineer @RIB software | BFSI | Fintech & Enterprise Apps | Java | Flutter | AWS

About

Flutter Mobile Engineer | Building Secure, Scalable Banking & FinTech Apps | Promoted to RIB BU (RIB Software GmbH) Solution-driven Flutter developer with 5+ years of full-time and freelance experience delivering production-grade, customer-facing mobile apps for banking, insurance, e-commerce, and construction SaaS. Promoted in March 2025 to RIB Business Unit (RIB Software GmbH – global construction tech leader) after owning 3 banking products at Winjit Technologies. Currently leading mobile architecture for an ambitious, enterprise-grade construction SaaS platform at RIB Software – in stealth development for ~1 year – powering next-gen project lifecycle management for global contractors. Core Strengths - Secure Mobile Architecture: Standardised encryption/decryption frameworks across Flutter banking apps (Aadhaar eKYC, SIM-binding, biometric + MPIN, UPI QR). - UI Consistency at Scale: Built RUI – shared UI library with Style Dictionary + Widgetbook – cutting UI rework by 60% on a German construction MVP. - Full-Stack Mobile Delivery: Integrated REST APIs, Razorpay, Stripe, Firebase, Google Maps, OCR, Bluetooth printing, SSO, and real-time geolocation across 15+ published apps(Google Play | App Store). Featured Products & Impact RIB-HUB (RIB Software GmbH): Leading Flutter frontend for a global-scale construction SaaS platform – modular, offline-first, multi-tenant, with real-time collaboration, BIM integration, SSO, task CRUD, in-task chat. MVP delivered in 3 months; now scaling to enterprise flagship (1+ year in development). - Suryoday SF Bank Biz App: Interactive UPI dashboard, loan flows, multi-account – live on Play Store. - MUA eKYC Insurance (Mauritius): OCR + PDF generation for self-service KYC – motor/non-motor policies. - Sidbi SEP Loan Platform: Aadhaar-authenticated MSME onboarding – individual & group workflows. Tech Stack Flutter | Dart | Firebase | React Native | MERN | JavaScript | Git VS Code | Android Studio | Xcode | Postman | Figma | Jira | AWS | Render | CodeMagic Languages: Hindi | English | Bengali | Español (A1) Let’s connect if you're building secure, scalable mobile experiences in fintech, construction SaaS, or enterprise mobility. Open to contract | full-time | advisory roles.

Location

Bengaluru

AI stack

claude code

claude

gemini

github copilot

mcp

ChatGPT

Work experience

Software Engineer at RIB Software, Jan 2026 - Present · 8 mos, India, • Lead end-to-end mobile architecture for RIB Unify, a B2B construction platform with offline-first sync. • Engineered RUI, an in-house Material 3 UI library (Widgetbook), accelerating feature delivery by 30%. • Decoupled monolithic codebase into micro-packages, enforcing Clean Architecture. • Implemented OAuth 2.0 with PKCE and runtime device security (root/jailbreak detection).

Software Engineer at Winjit Technologies Pvt Ltd, Oct 2023 - Dec 2025 · 2 yrs 3 mos, India, • Architected high-security FinTech apps, collaborating closely with backend, QA, and product teams. • Engineered comprehensive security workflows, combining identity verification (SIM binding, biometric auth, OCR) with robust API protection (SSL pinning, secure storage, and Mutex-locked token refreshing). • Optimized rendering for heavy & dynamic UI using Dart Isolates and RepaintBoundary.

Software Developer at Upwork, Jan 2021 - Sep 2023 · 2 yrs 9 mos, India, I have worked on couple of interesting projects on Upwork.com site and gained a lot of experience in working with Flutter, Firebase, REST APIs, React.js, Node.js.

Software Developer at Freelancer.com, Jan 2021 - Oct 2021 · 10 mos, Remote

Education

Bachelor of Technology, Computer Software Engineering, sharda university

CBSE, High School/Secondary Certificate Programs, durgapur public school

Public links

github: https://github.com/nikhilsinha-github

leetcode: https://leetcode.com/user1938AU