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Hi, I am Aleksandar Mandic, a senior software engineer with 7+ years of experience specializing in Python, Node.js, and cloud-native development. I enjoy building scalable, reliable systems and delivering value through clean code, thoughtful architecture, and a collaborative mindset. Beyond coding, I mentor junior engineers, improve team processes, and champion best practices like TDD and CI/CD. I also enjoy integrating AI-driven solutions to solve complex problems and boost product outcomes, while keeping a strong focus on quality and maintainability.…Hi, I am Aleksandar Mandic, a senior software engineer with 7+ years of experience specializing in Python, Node.js, and cloud-native development. I enjoy building scalable, reliable systems and delivering value through clean code, thoughtful architecture, and a collaborative mindset. Beyond coding, I mentor junior engineers, improve team processes, and champion best practices like TDD and CI/CD. I also enjoy integrating AI-driven solutions to solve complex problems and boost product outcomes, while keeping a strong focus on quality and maintainability.

Aleksandar Mandic

Full Stack Developer, Back-End Developer, Front-End Developer, +5

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Hi, I am Aleksandar Mandic, a senior software engineer with 7+ years of experience specializing in Python, Node.js, and cloud-native development. I enjoy building scalable, reliable systems and delivering value through clean code, thoughtful architecture, and a collaborative mindset. Beyond coding, I mentor junior engineers, improve team processes, and champion best practices like TDD and CI/CD. I also enjoy integrating AI-driven solutions to solve complex problems and boost product outcomes, while keeping a strong focus on quality and maintainability.…Hi, I am Aleksandar Mandic, a senior software engineer with 7+ years of experience specializing in Python, Node.js, and cloud-native development. I enjoy building scalable, reliable systems and delivering value through clean code, thoughtful architecture, and a collaborative mindset. Beyond coding, I mentor junior engineers, improve team processes, and champion best practices like TDD and CI/CD. I also enjoy integrating AI-driven solutions to solve complex problems and boost product outcomes, while keeping a strong focus on quality and maintainability.

Available to hire

Hi, I am Aleksandar Mandic, a senior software engineer with 7+ years of experience specializing in Python, Node.js, and cloud-native development. I enjoy building scalable, reliable systems and delivering value through clean code, thoughtful architecture, and a collaborative mindset.

Beyond coding, I mentor junior engineers, improve team processes, and champion best practices like TDD and CI/CD. I also enjoy integrating AI-driven solutions to solve complex problems and boost product outcomes, while keeping a strong focus on quality and maintainability.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Advanced

Serbian

Fluent

Work Experience

Senior Software Engineer at Ciklum

March 1, 2022 - Present

- Designed and deployed microservice-based financial systems, scaling to support 50K+ daily API calls while ensuring regulatory compliance and zero downtime for merchants. - Mentored a team of five junior engineers, improving code quality and delivery efficiency through structured reviews, design guidance, and test-driven development practices. - Integrated AI-driven fraud detection into transaction flows, cutting fraudulent activity by 40% and improving trust with Central Bank auditors and external partners. - Engineered asynchronous reporting pipelines, reducing report generation times by 60% and enabling real-time delivery of transaction, settlement, and invoice summaries. - Implemented automated fee deduction and refund models in Banking-as-a-Service, boosting recurring revenue by 25% and reducing manual finance team workloads significantly.

Software Engineer at CodeIT

February 18, 2022 - June 3, 2019

- Migrated monolithic travel services into modular cloud-based infrastructure, reducing deployment times by 40% and improving system reliability for global B2B partners. - Scaled booking APIs to process 10K+ daily transactions, delivering seamless integration of flights, hotels, and tour services across international partner platforms. - Reduced checkout latency from 4 seconds to under 0.5 seconds by optimizing backend processes, significantly improving customer purchase conversion rates. - Improved large dataset synchronization by 45% with background processing pipelines, reducing manual reconciliation efforts for travel agencies by thousands of records daily. - Built resilient distributed systems for seasonal peaks, decreasing downtime by 35% and ensuring consistent availability during high-demand tourism periods worldwide.