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Abhishek Mishra

@ abhishek0023c@gmail.com | ☎ +91-9101284041 | ⌂ Kolkata, India | ↗ LinkedIn

Backend-focused software engineer with 5+ years of experience building and operating ERP, compliance, and integration-heavy systems in .NET environments.

Work Experience

Senior Software Engineer — Mindfire Solutions

March 2022 – Present

▸ PEPPOL Invoicing & Compliance Platform — Primary backend engineer • Aug 2025 – Present •

  • Designed and implemented a PEPPOL-compliant invoicing and validation platform spanning UBL generation, delivery, acknowledgements, and reconciliation across multiple participating systems.
  • Defined and enforced a compliance boundary for invoice generation, implementing structural and business-rule validations aligned with PEPPOL and partner-specific requirements.
  • Built an adapter-driven resolution layer to map customers and channels across evolving domain models, avoiding brittle conditional logic and tight coupling.
  • Maintained end-to-end invoice lifecycle state, handling delivery outcomes and delayed or out-of-order acknowledgements using reconciliation and eventual consistency.
  • Developed a server-rendered operational dashboard (ASP.NET MVC, HTMX, Alpine.js) to observe validation failures, delivery status, and cross-system interactions.

▸ ERP Core Platform — Backend owner for core domains; full-stack contributor on critical workflows • July 2022 – Present •

  • Joined during the early phase of a legacy ERP rewrite (.NET + WebForms → .NET Web API + Angular) and progressively took ownership of backend development across core ERP domains.
  • Worked end-to-end across orders, pricing, invoicing, payments, reporting, exports, and integrations, owning API design, data access, and performance characteristics.
  • Reworked system-wide data access patterns, consolidating query-heavy flows into single round-trip executions; the impact was most visible in the price calculation pipeline, where centralized logic replaced per-item queries, reducing first-load times from ~8s → ~2s.
  • Refactored long-running workflows into background processing with persisted job tracking, improving responsiveness and observability for asynchronous operations such as order creation, invoice generation, and large exports.
  • Implemented a Google Drive–backed document management module, including backend abstractions and a custom file-explorer-style UI.
  • On the frontend, focused on data flow and state management, structuring Angular components around domain-style TypeScript models and introducing client-side caching.
  • Refactored high-traffic ERP screens (Sales Orders, Purchase Orders, Payments, reporting) to improve responsiveness and workflow efficiency.

▸ ERP Satellite Services — Integrations & Automation — Backend engineer • August 2024 – Present •

  • Built the backend APIs for a supplier contract management service integrated with DocuSign.
  • Implemented webshop integration APIs for synchronizing customers, products, and orders with external platforms (e.g., WooCommerce, Orderchamp).
  • Designed and implemented bookkeeping connectors (e.g., Exact Online) end-to-end, handling periodic exports and integration logic.
  • Migrated and maintained background processing services supporting stock reconciliation, demand analysis, customer inactivity detection, and order/invoice automation workflows.
  • Worked closely with other engineers to deploy, operate, and evolve these services in production.

▸ Internal Authentication Server — Backend engineer (team contributor) • March 2022 – Sept 2022 •

  • Contributed to the development of a custom OAuth2-based Single Sign-On (SSO) solution used across multiple internal applications.
  • Implemented and refined shared authentication flows to support centralized access across services.

▸ Additional Contributions - Reviewed and guided development of internal tools (e.g., Recruitment/HR portal), providing architectural and implementation feedback. - Mentored colleagues transitioning from legacy systems, supporting adoption of modern .NET practices.

Programmer Analyst — Cognizant Technology Solutions

Nov 2020 – Mar 2022

▸ Author Royalty Management (EOL Re-Write) — Junior Developer • * Mar 2021 – Mar 2022 *

  • Contributed to the rewrite of a multi-application royalty management system, migrating UIs from Silverlight to Web technologies (HTML, CSS, JavaScript).
  • Reimplemented application and business-layer logic using ASP.NET WebForms and MVC, translating existing Silverlight code-behind.
  • Built and enhanced UI workflows, working with both application-specific and shared centralized databases.
  • Produced technical and functional documentation to support team and client usage.

Skills

  • Backend: C#, .NET, ASP.NET Core (Web API, MVC), Entity Framework Core, LINQ, Quartz, Hangfire
  • Frontend: Angular, TypeScript, HTMX ,Alpine.js , Bootstrap
  • Architecture: REST API design, Domain-Driven Design (DDD), CQRS, SOLID
  • Infrastructure & Delivery: Docker, Docker Compose, Docker Swarm, self-managed VPS deployments
  • Data & Messaging: PostgreSQL, MySQL, RabbitMQ
  • Authentication & Security: ASP.NET Core Identity, OAuth2, Open Id Connect , JWT, external identity providers
  • Testing: Unit and integration testing (xUnit, Moq)

## Education

B.Tech in Computer Science, Bengal College Of Engineering And Technology, Maulana Abul Kalam University Of Technology
2016 – 2020 | CGPA 8.2

12th in Science Stream, Gyan Vigyan Acacdemy , Assam Higher Secondary Eduction Council
2012 – 2014 | 76%

10th, Don Bosco High School , Board Of Secondary Education Assam 2012 | 78%

Interests: Fitness & training • Cooking & recipe experimentation • Electrical DIY • War history • Tech exploration

Languages: English (Fluent) • Hindi (Fluent) • Assamese (Conversational) • Bhojpuri (Conversational) • Bengali (Conversational)