Vladislav Maksimovic, Developer in Novi Sad, Vojvodina, Serbia
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Vladislav Maksimovic

Software Engineer and Developer

Novi Sad, Vojvodina, Serbia

Toptal member since January 26, 2026

Bio

Vladislav is a senior software engineer with 10+ years of experience building scalable, high-performance web applications and complex systems. An expert in JavaScript/TypeScript, React, Next.js, Node.js (NestJS), AI, and AWS, he is skilled in end-to-end development, SaaS platforms, and AI-powered products. Known for clean code, clear communication, and reliable delivery, Vladislav takes ownership, understands business needs, and ships real value.

Portfolio

Neiva
JavaScript, TypeScript, Node.js, React, Next.js, Artificial Intelligence (AI)...
JSGuru
JavaScript, React, Next.js, Node.js, TypeScript, Full-stack, Tailwind CSS
Indigo Ideas
Artificial Intelligence (AI), Generative Artificial Intelligence (GenAI), React...

Experience

  • JavaScript - 11 years
  • Node.js - 10 years
  • React - 10 years
  • TypeScript - 9 years
  • Amazon Web Services (AWS) - 8 years
  • Next.js - 8 years
  • NestJS - 8 years
  • Artificial Intelligence (AI) - 7 years

Preferred Environment

React, Next.js, Slack, Node.js, JavaScript, TypeScript, NestJS

The most amazing...

...projects I've led involved overseeing extensive platforms for insurance, airports, child online safety, and UN-endorsed climate projects, serving millions.

Work Experience

Lead Software Engineer

2023 - PRESENT
Neiva
  • Contributed to a UN-backed platform aimed at preventing global warming, delivering scalable solutions for data processing and impact tracking.
  • Developed a high-traffic airport lounge management system supporting over a few million users, ensuring scalability, reliability, and seamless integrations.
  • Spearheaded the development of a platform focused on protecting children online, handling sensitive data, and meeting security requirements.
Technologies: JavaScript, TypeScript, Node.js, React, Next.js, Artificial Intelligence (AI), Large Language Models (LLMs), Generative Artificial Intelligence (GenAI), Full-stack, Tailwind CSS

Full-stack Engineer & Tech Lead

2021 - 2023
JSGuru
  • Built and scaled an insurance platform used by several million users, owning back-end architecture, APIs, and system performance.
  • Led technical decisions and architecture across multiple client projects, mentoring engineers and ensuring high code quality and delivery standards.
  • Collaborated with clients to translate business requirements into robust technical solutions, delivering end-to-end projects.
  • Delivered enterprise-scale, long-running production systems in regulated domains, handling high traffic, sensitive data, and complex integrations.
Technologies: JavaScript, React, Next.js, Node.js, TypeScript, Full-stack, Tailwind CSS

Software Engineer & Tech Lead

2019 - 2021
Indigo Ideas
  • Headed multiple software projects end to end, owning technical decisions, architecture, and delivery from planning through production deployment.
  • Delivered over five MVPs across different projects, ensuring fast iteration, high code quality, and alignment with business requirements.
  • Managed and mentored a team of engineers, setting technical direction, conducting code reviews, and supporting skill and career growth.
  • Improved development processes and engineering standards, increasing delivery predictability and overall software quality.
Technologies: Artificial Intelligence (AI), Generative Artificial Intelligence (GenAI), React, Node.js, Amazon Web Services (AWS), Next.js, NestJS, TypeScript, JavaScript, Full-stack, Tailwind CSS, Python

Full-stack Developer

2015 - 2018
Freelancer
  • Delivered multiple small to mid-size web applications end to end, handling front end, back end, deployment, and maintenance independently.
  • Worked directly with clients to gather requirements, provide technical guidance, and deliver solutions aligned with business needs and timelines.
  • Built a strong foundation in JavaScript, HTML, and CSS while rapidly expanding full-stack skills through real-world production projects.
Technologies: JavaScript, TypeScript, Node.js, HTML, CSS, Full-stack

Experience

AI Orchestration and Multi-LLM Platform

• Led the full-stack architecture and development of a scalable AI orchestration platform enabling multi-LLM interactions through unified APIs and intelligent context pipelines.
• Designed model adapter layers, implemented cost-optimized request routing, and built real-time streaming AI interfaces.
• Defined system architecture leveraging edge compute and distributed state management to ensure low latency and high concurrency.

Reflek

https://www.reflek.io/
As a senior software engineer, I contributed to the development of an AI-powered SaaS platform that bridges physical infrastructure with intelligent digital twin environments. I engineered scalable front-end systems using React and Next.js, enabling AI-augmented user experiences and generative workflows. The platform embedded AI across multiple layers, enhancing real-time data visualization, decision-support interfaces, and automated interactions. My role involved delivering high-performance, production-grade web applications aligned with the company-wide AI-first mandate.

United Nations, Climate Change Secretariat

https://unfccc.int/process-and-meetings/transparency-and-reporting/preparing-for-the-ETF
I collaborated with international teams under the United Nations Climate Change Secretariat on a high-impact project aimed at mitigating global warming. I spearheaded efforts within a scrum team to develop a comprehensive reporting platform for countries, facilitating the transparent tracking and management.

Thinksurance

https://thinksurance.us/
A digital platform for InsurTech integration. At Thinksurance, my journey as a software engineer was centered around architecting and refining cutting-edge web applications. Armed with a deep mastery of React and Node.js, I delved into an intricate ecosystem of over 100 projects, ranging from services and portals to diverse modules. My hands-on involvement in over five of these projects propelled the platform's digital transformation, ensuring it stood out in the bustling InsurTech landscape.

Collaborating within an ensemble of six dynamic teams, we were the driving force behind the platform's innovative strides. Our development DNA was deeply embedded with industry-leading practices: clean code, domain-driven design (DDD), microservices, and the avant-garde hexagonal architecture.

Beyond technical development, my role was characterized by meticulous project management, ensuring synchronization with business goals and timely deliveries. Though my chapter with Thinksurance has concluded, my fervor for harnessing tech's evolving paradigms remains undiminished, as I continually seek to enhance and diversify my skillset in the tech frontier.

Skills

Libraries/APIs

React, Node.js

Tools

Slack

Languages

JavaScript, TypeScript, HTML, CSS, Python

Frameworks

Next.js, NestJS, Tailwind CSS

Platforms

Amazon Web Services (AWS)

Storage

PostgreSQL

Paradigms

Microservices

Other

Full-stack, Artificial Intelligence (AI), Large Language Models (LLMs), Generative Artificial Intelligence (GenAI), Multimodal GenAI, RAG Architecture, Cloudflare, Supabase, Supabase Auth, Pgvector

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