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Full-stack software engineer with 5+ years of experience building and scaling production-grade B2B and data-intensive platforms using TypeScript, React, Next.js, and NestJS. I deliver end-to-end features—from system design and backend architecture to performant, user-centric frontend experiences. I’ve worked across aviation e-commerce, fintech/trading, agritech, and e-learning, collaborating with international cross-functional teams. I focus on scalability, performance, and pragmatic system design, with hands-on ownership of critical product functionality in fast-moving environments.…Full-stack software engineer with 5+ years of experience building and scaling production-grade B2B and data-intensive platforms using TypeScript, React, Next.js, and NestJS. I deliver end-to-end features—from system design and backend architecture to performant, user-centric frontend experiences. I’ve worked across aviation e-commerce, fintech/trading, agritech, and e-learning, collaborating with international cross-functional teams. I focus on scalability, performance, and pragmatic system design, with hands-on ownership of critical product functionality in fast-moving environments.

Nikola Nešić

Full Stack Developer, Back-End Developer, Web Developer, +2

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Full-stack software engineer with 5+ years of experience building and scaling production-grade B2B and data-intensive platforms using TypeScript, React, Next.js, and NestJS. I deliver end-to-end features—from system design and backend architecture to performant, user-centric frontend experiences. I’ve worked across aviation e-commerce, fintech/trading, agritech, and e-learning, collaborating with international cross-functional teams. I focus on scalability, performance, and pragmatic system design, with hands-on ownership of critical product functionality in fast-moving environments.…Full-stack software engineer with 5+ years of experience building and scaling production-grade B2B and data-intensive platforms using TypeScript, React, Next.js, and NestJS. I deliver end-to-end features—from system design and backend architecture to performant, user-centric frontend experiences. I’ve worked across aviation e-commerce, fintech/trading, agritech, and e-learning, collaborating with international cross-functional teams. I focus on scalability, performance, and pragmatic system design, with hands-on ownership of critical product functionality in fast-moving environments.

Available to hire

Full-stack software engineer with 5+ years of experience building and scaling production-grade B2B and data-intensive platforms using TypeScript, React, Next.js, and NestJS. I deliver end-to-end features—from system design and backend architecture to performant, user-centric frontend experiences.

I’ve worked across aviation e-commerce, fintech/trading, agritech, and e-learning, collaborating with international cross-functional teams. I focus on scalability, performance, and pragmatic system design, with hands-on ownership of critical product functionality in fast-moving environments.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Serbian

Fluent

Work Experience

Software Engineer at Niki/Software Engineer (name appears as Software Engineer, company shown as software engineer symphony.is)

May 1, 2024 - Present

Developed and scaled backend services with NestJS and MongoDB for a B2B aviation marketplace, handling tens of thousands of inventory records and transactional events. Implemented event-driven integrations using Amazon AppFlow and RabbitMQ to decouple microservices from Salesforce ERP and enable reliable near real-time synchronization of inventory, orders, and critical business data. Built and optimized a client-facing application in Next.js with reusable component architecture to improve UI consistency and development speed. Supported an early-2024 platform launch enabling a transparent, self-service marketplace for aviation customers, reducing procurement friction and improving data visibility. Led the initiative to design and implement a data analytics performance dashboard for real-time visibility into key platform metrics and system performance.

Software Engineer at N.iy? (Software Eng. position) — Aviation Industry B2B Marketplace & Data Platform (software engineering role)

May 1, 2024 - Present

Designed and developed scalable backend services using NestJS and MongoDB to support a B2B aviation marketplace handling tens of thousands of inventory records and transactional events. Implemented event-driven integrations leveraging Amazon AppFlow for event routing and RabbitMQ for message queuing, decoupling microservices from a Salesforce-based ERP and enabling reliable near real-time synchronization of inventory, orders, and critical business data. Optimized the client-facing application in Next.js with reusable component architecture to improve UI consistency and development speed. Contributed to a platform launch in early 2024 transforming an inventory provider into a transparent, self-service marketplace for aviation customers. Led the initiative to design and implement a data analytics performance dashboard enabling real-time visibility into platform metrics and system performance.

Software Engineer at Qode Software Company (BrightFunded – Proprietary Trading Platform)

December 1, 2022 - May 1, 2024

Delivered core features for a secure, highly-available proprietary trading platform supporting thousands of active users and simulated trading challenges under realistic market conditions. Implemented interactive and gamified user flows to increase engagement and retention across the platform. Collaborated closely with product management in a small startup team (PM + 2 engineers) to influence feature prioritization and technical decision-making. Shipped end-to-end functionality across backend APIs and frontend UI, ensuring performance, reliability, and clean abstractions.

Software Engineer at Code Software Company (BrightFunded) — Proprietary Trading Platform (Fintech/Trading)

December 1, 2022 - May 1, 2024

Developed core features for a secure, highly-available proprietary trading platform supporting thousands of active users and simulated trading challenges under real-market conditions. Implemented interactive and gamified user flows to increase engagement and retention across the platform. Collaborated closely with product management in a small startup team (PM + 2 engineers), contributing directly to feature prioritization and technical decision-making. Delivered end-to-end features from backend APIs to frontend UI, ensuring performance, reliability, and clean abstractions.

Software Engineer at Cornel Sense eAcademy — E-Learning Platform

March 1, 2021 - December 1, 2022

Developed and maintained core functionality for a large-scale e-learning platform delivering digital educational content and personalized learning paths. Improved application performance and responsiveness to contribute to a smoother learning experience across devices. Wrote comprehensive automated tests using Cypress and Jest to increase confidence in critical user flows and reduce regressions. Participated in discovery sessions and agile planning, contributing to technical solutions and team OKRs. Worked within multiple cross-functional agile teams including product managers and software engineers.

Software Engineer at Vega IT

March 1, 2021 - December 1, 2022

Built and maintained full-stack features for a data-heavy precision agriculture platform processing large geospatial datasets from satellite imagery and IoT sensors. Designed and implemented complex data-driven UIs in React enabling users to visualize and interact with near real-time large-scale agricultural data. Worked closely with data science and agronomy teams to translate domain-specific requirements into scalable technical solutions. Improved frontend performance and data handling for smooth interaction with high-volume geospatial datasets. Also supported an internal HRIS platform with complex state management using Redux and participated in code reviews and pair programming to maintain code quality across the team.

Software Engineer (Inventory Tracker - Internal Tool) at CornelSene eCademy (E-Learning Platform) / Internal Inventory Tracker (company name unclear)

January 1, 2021 - January 1, 2022

Designed and implemented the foundational architecture for an internal inventory management web application. Delivered scalable core features supporting company-wide usage and future extensibility.

Software Engineer at Internal HRIS Platform

January 1, 2020 - December 1, 2022

Implemented complex state management using Redux for an internal HR management system. Participated in code reviews and pair programming, helping maintain code quality and consistency across the team.

Software Engineer at Source.ag (Precision Agriculture Platform - Agritech)

January 1, 2020 - December 1, 2022

Built and maintained full-stack features for a data-heavy precision agriculture platform processing large geospatial datasets from satellite imagery and IoT sensors. Designed and implemented complex data-driven UIs in React to allow users to visualize and interact with large-scale agricultural data in near real time. Worked with data science and agronomy teams to translate domain requirements into scalable technical solutions. Improved frontend performance and data handling for smooth interaction with high-volume geospatial datasets.