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Mahzaib Sher

@mahzaibsher

SQA Engineer ensuring secure, high-quality blockchain and DeFi applications through rigorous testing.

Pakistan
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What I'm looking for

I’m looking for a QA role where I can validate smart contracts and DeFi workflows, strengthen security and performance through thorough functional/non-functional testing, and support reliable releases using automation and strong QA process ownership.

I’m a Software Quality Assurance Engineer focused on ensuring secure, scalable, and high-quality decentralized applications. I bring expertise in blockchain and DeFi ecosystems, with hands-on testing experience across Solana and Celo, plus finance and trading platforms.

In my recent work, I perform functional and non-functional testing to ensure reliability and performance, and I validate finance-related workflows for data accuracy and compliance standards. I also test and optimize AI chatbot solutions to improve accuracy, usability, and seamless user interactions.

Previously, I tested Solana-based applications for reward timing, deposit/withdrawal integrity, and performance under stress. I also validated wallet and Discord integrations, one-to-one linking, accurate task reward distribution, referral functionality, and UI compliance against Figma designs.

I’m comfortable owning detailed test cases across the SDLC, collaborating with cross-functional teams to resolve issues, and improving QA processes for efficiency and timely delivery. I mentor junior team members, follow STLC and Agile practices, and use tools like Jira, Postman, and JMeter to support strong release quality.

Experience

Work history, roles, and key accomplishments

DI
Current

Software Quality Assurance Engineer

Diggit

Jun 2025 - Present (1 year)

Performed functional and non-functional testing to validate reliability and performance for finance-related applications, including workflow correctness, data accuracy, and compliance. Tested and optimized AI chatbot solutions and collaborated with cross-functional teams to improve QA processes and deliver scalable applications.

BL

Software Quality Assurance Engineer

BlockApex

Mar 2024 - Feb 2025 (11 months)

Tested a Solana-based Push The Button app to ensure correct reward timing, deposit/withdrawal integrity, and performance under stress aligned with tokenomics. Validated airdrop wallet/Discord integration and one-to-one linking, and QA’d a Bullion FX trading app for real-time trade correctness and mandatory 2FA security.

CL

Software Quality Assurance Engineer

Crystallite Pvt Ltd

Aug 2022 - Feb 2024 (1 year 6 months)

Conducted comprehensive mobile and web testing for SoulScribe and related applications, executing detailed test cases across the SDLC. Resolved issues with cross-functional teams, mentored junior team members, and optimized testing processes to improve efficiency and support timely delivery.

Education

Degrees, certifications, and relevant coursework

PAF-KIET logoPA

PAF-KIET

Bachelor of Science, Computer Science

2018 - 2022

Bachelor of Science in Computer Science. Final year project (Smart Doctor): a platform for skin disease identification with appointment scheduling and doctor availability management.

Tech stack

Software and tools used professionally

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