
Vladislav Maksimovic
Verified Expert in Engineering
Software Engineer and Developer
Novi Sad, Vojvodina, Serbia
Toptal member since January 26, 2026
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
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
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.
Full-stack Engineer & Tech Lead
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.
Software Engineer & Tech Lead
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.
Full-stack Developer
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.
Experience
AI Orchestration and Multi-LLM Platform
• 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/United Nations, Climate Change Secretariat
https://unfccc.int/process-and-meetings/transparency-and-reporting/preparing-for-the-ETFThinksurance
https://thinksurance.us/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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