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Mayank BaliyanMB

Mayank Baliyan

Senior Software Engineer

€215/day
Delhi, IN
3-7 years

Average response time: 1 hour

About Mayank

I’m a freelance backend developer with over 4 years of professional experience designing and scaling high-performance systems for fintech and enterprise clients. I specialize in Golang, Java, and Spring Boot, building secure, reliable, and scalable backend architectures that power real-world business impact.

At Appzen and Rapipay, I engineered microservices and event-driven platforms that processed tens of millions of requests, optimized APIs by up to 45%, and improved system reliability through Kafka pipelines, database tuning, and AWS-based deployments. My solutions are performance-driven, cloud-ready, and designed for long-term scalability.

I’m passionate about transforming complex backend challenges into elegant, measurable outcomes — from real-time APIs and CRM systems to data pipelines and auditing solutions. With every project, I bring a freelancer’s agility, clear communication, and a strong sense of ownership, ensuring smooth collaboration and on-time delivery.

Core Skills:
Golang • Java • Spring Boot • Microservices • Kafka • AWS • Docker • Kubernetes • Redis • ElasticSearch • gRPC • PostgreSQL • MongoDB

If you’re looking for a dedicated backend expert to build or optimize your system, let’s connect and discuss how I can help scale your product with clean, efficient, and future-proof code.
  • English

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • Appzen India Labs Private Limited
    Software Engineer - 2
    July 2024 - Today (1 year and 11 months)
    Pune, Maharashtra, India
    • Tech Stack: Golang, Java, Spring Boot, Drools Rule Engine, Kafka, Grafana, Temporal, ElasticSearch, AWS, MYSQL, PostgreSQL, MongoDB, Spring WebFlux, Mockito, Docker, Kubernetes, BitBucket
    • Developed Golang GRPC clients and server APIs to enable platfrom feature by enabling sqlboiler for DB Connectivity and improve api performance by 45 percent.
    • Created Dashboard and Alerts in Grafana for monitoring the Services and RestAPIs for analyzing query execution time and optimizing performance by 40 percent.
    • Developed Card Audit for auditing card transaction for clients like Amazon by processing 10 M transactions annually, Improved API performance upto 40 percent by optimizing DB queries, Indexing DB, including pagination, ASYNC flow.
    Java Apache Kafka GO Microservices PostgreSQL
  • Rapipay Fintech Private Limited
    Software Engineer
    September 2021 - July 2024 (2 years and 10 months)
    Noida, Uttar Pradesh, India
    Java, Spring Boot, Drools Rule Engine, Kafka, Redis, ElasticSearch, AWS, Postgres, MongoDB, Spring WebFlux, REST, Mockito, Docker, Kubernetes, Git, JProfiler, VisualVM, Actuator
    • Implemented a messaging system capable of processing 40 million requests annually across email, SMS, push notifications.
    • Implemented an event processing system capable of handling 100 million requests, including audit logs and CRM data.
    • Engineered a robust integration of the Drools Rule Engine into Spring Boot, enhancing real-time data analysis capabilities while managing 1,000+ rules.
    Java Kotlin Spring boot Apache Kafka Drools

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Education

  • Bachelor of Technology
    KIET Group Of Institutions
    2022
    Bachelor of Technology

Skill set

Categories