Software Engineer II (IP)

11/14/2025

As a member of the engineering team, you will be responsible for building cutting-edge products in the crypto investment space. You will work on micro-services, collaborate with cross-functional teams, and optimize the performance of Go code.

Working Hours

40 hours/week

Company Size

51-200 employees

Language

English

Visa Sponsorship

About The Company

Mudrex is India’s best crypto trading app and a leading FIU-registered crypto platform built to make crypto investing and trading simple, safe, and accessible for everyone. Our mission is to transform how individuals and institutions participate in the world of crypto by combining powerful technology, transparent processes, and world-class security. We believe cryptocurrencies are a core part of long-term wealth creation — but we also understand that crypto is a unique asset class that demands clarity, planning, and trust. That’s why we provide investors with research-backed insights, guided tools, and an intuitive platform that helps them make informed and confident decisions. Whether you’re exploring how to enter the market or expanding an existing portfolio, Mudrex gives you the foundation to invest responsibly. With user-friendly producWe believe that investing in cryptocurrencies is key to building lasting wealth and that not all investment approaches are created equal. We understand that cryptocurrencies represent a unique asset class that requires careful consideration and planning. That's why we provide our clients with the tools, resources, and expertise to make informed investment decisions. Our ultimate goal is to help our clients achieve their financial goals and become their go-to platform for crypto investing. Our mission is to simplify the process of investing in crypto assets, catering specifically to those who seek to invest rather than trade. Our user-friendly platform offers a range of products designed to provide market-linked and stable returns, enabling you to effectively build and expand your crypto portfolio. Additionally, we offer tailored guidance to investors keen on exploring this burgeoning asset class. We take pride in being backed by prestigious investors such as Y-Combinator, Nexus Venture Partners, and other esteemed names in the industry. Join us on our journey to make crypto investing accessible and hassle-free for everyone!

About the Role

<span style="font-size:10pt;font-family:Arial,sans-serif;color:#1d1c1d;background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Mudrex <span style="font-size:10pt;font-family:Arial,sans-serif;color:#1d1c1d;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">is a global crypto-investing platform launched in 2018.  Mudrex is a Y-Combinator backed enterprise simplifying crypto investing for retail and everyday investors. It is the world’s largest crypto index investing platform and aims to be the largest asset management platform in the world in the next few years. We are growing rapidly - today, the Mudrex fold is 1 Million strong and counting. This growth comes from the effort of a strong and high performing team and we are looking to add more members to the very driven team at Mudrex. <span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">The folks at Mudrex are young and driven to a single purpose - to build a strong self-serving platform that simplifies investing in cryptocurrency.<span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;"> <span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;"> <span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">What you’ll do here at Mudrex:<span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">As a member of the engineering team, you will be responsible for building cutting-edge products in the crypto investment space. <span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;"> <span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">You will be<ul style="margin-top:0;margin-bottom:0;"><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Working on micro-services written in Golang.</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Writing clean, efficient, testable, and maintainable code (low #of bugs, optimized for performance)</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Collaborating with cross-functional teams to develop new features.</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Participating in code reviews and providing feedback to other developers</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Optimize the performance of Go code using best practices for service design patterns, concurrency, fault tolerance, benchmarking, and observability.</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Building scalable and high-performance APIs</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Troubleshooting and debugging issues in production environments</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Roboto,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Writing unit-tested code</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Building products that interact with multiple blockchains behind the scenes.</li></ul> <span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">What we are looking for in you:<ul style="margin-top:0;margin-bottom:0;"><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Bachelor's/Master's degree in Computer Science or related field (or equivalent experience)</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">2-5 years of hands-on experience. (Preferably Golang)</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Experience with RESTful APIs, WebSocket, and Microservices</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Experience with SQL and NoSQL databases such as MySQL, MongoDB, or PostgreSQL</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Excellent communication and collaboration skills</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Strong analytical and problem-solving skills</li></ul> <span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Brownie Points if you:<ul style="margin-top:0;margin-bottom:0;"><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Have experience in Golang with an understanding of concurrency.</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Have written unit and integration tests (preferred in Golang)</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Experience in working on blockchains. (Written smart contracts)<ul style="margin-top:0;margin-bottom:0;"><li dir="ltr" style="list-style-type:circle;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Basic understanding of how different L1/L2 chains work</li></ul></li></ul> <span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">You should apply if you are:<ul style="margin-top:0;margin-bottom:0;"><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Autonomous, critical thinker with razor-sharp problem-solving skills</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Passionate about learning new tools, languages, philosophies, and workflows</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Exceptional at time management and have a proven track record of being able to work remotely with few issues.</li></ul><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">What happens after you apply:<span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;"> (steps of the interview process)<span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Round 1: Introductory HR round (15 mins)<span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Round 2: Machine Coding Round (60-75 mins)<span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Round 3: System Design round with resume overview and history of experience (60-80 mins)<span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Round 4: Culture fit round (15-30 mins)<span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Round 5: Offer discussions <span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">What would your life be like if you were a part of the Mudrex team:<ul style="margin-top:0;margin-bottom:0;"><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">We provide health insurance to you and your family and have generous coverage in place for you.</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">We provide relocation assistance if you have to move to Bangalore including transport tickets, accommodation and movement of goods.</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">We take your physical fitness and overall health very seriously. You will receive a health club membership once you join if you would like one.</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">We also reimburse expenses incurred in mental health and well-being.</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Food is taken care of for you. We subscribe to delicious and healthy meals and have a very well-stocked pantry at all times.</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">We have a flexible leave policy in place as we operate in a high-trust environment where each individual’s accountability is their own.</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Our parental leave is gender agnostic and we classify each individual as a primary or secondary caregiver.</li><li dir="ltr" style="list-style-type:disc;font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;"><span style="font-size:10pt;font-family:Arial,sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">We want you to learn and grow with us. To facilitate this, we sponsor your courses/ training subject to assessments and outcomes.</li></ul>

Key Skills

GolangMicroservicesRESTful APIsWebSocketSQLNoSQLMySQLMongoDBPostgreSQLCode ReviewsDebuggingUnit TestingBlockchainConcurrencySmart Contracts