Zechao Jin

Backend engineer with 8 years of experience focused on Golang, microservices, and distributed systems. Mainly specialized in backend development, while also interested in DevOps practices and contributing to full-stack work when needed.

BLP-digital - an AI-driven platform that automates ERP workflows

Remote

Senior Backend Engineer (Golang/Javascript)

Sep. 2025 - Present

  • Design and implement new backend features and services using OpenAPI-driven workflows.
  • Golang
  • OpenAPI
  • Docker
  • K8S
  • MySQL
  • Protobuf
  • GitHub Actions

AREX Markets and Bankable - A lending platform focused on SMEs

Remote

Senior Backend Engineer (Golang/Javascript)

June 2021 - June 2025

  • Built and maintained event-driven Golang microservices that automated SME onboarding workflows, reducing manual effort and increasing onboarding speed by 3x.
  • Designed workflows to evaluate credit risk, insolvency probability, and company financial health, enabling automated decision-making during onboarding.
  • Developed REST APIs and Vue-based admin dashboards for managing companies, partners, contracts, pricing, and risk rules.
  • Integrated LLM solutions to auto-extract key fields from documents, reducing data-entry time and improving user experience.
  • Migrated and refactored legacy Node.js services into performant Golang services, improving maintainability and reducing system latency.
  • Used AWS SQS/SNS for asynchronous communication, implemented background job processing, and optimized internal event flow.
  • Golang
  • Vue
  • Protobuf
  • Docker
  • K8S
  • AWS SQS/SNS
  • AWS S3
  • Postgres
  • Datadog

TravelgateX - A B2B travel platform connecting travel suppliers and sellers

Palma de Mallorca

Backend Engineer (Golang)

Apr. 2018 - May. 2021

  • Developed high-performance HotelX microservices in Golang for hotel search, booking, and static data, supporting over 7 billion daily search requests.
  • Reduced API latency significantly through in-memory caching, Redis, and performance profiling (pprof), lowering infrastructure costs.
  • Enhanced system observability using Prometheus and Grafana dashboards; maintained service configs with Consul.

Integration Engineer (C#)

Aug. 2017 - Apr. 2018

  • Integrated and maintained supplier APIs using C#, ensuring stable and high-quality connections to the TravelgateX network.
  • Golang
  • C#
  • Elasticsearch
  • Redis
  • Consul
  • Protobuf
  • Prometheus
  • GraphQL
  • Docker
  • Grafana

Bachelor of Computer Science, Universitat de les Illes Balears

2013 - 2019

Master of Data Science, Universitat Oberta de Catalunya

2020 - 2022

photo of me

    • Programming
    • Golang
    • Python
    • Javascript
    • C#
    • Java
    • SQL
      Frameworks
    • Gin
    • Vue
    • Hugo
    • React
    • .NET
      Databases
    • Postgres
    • MySQL
    • Redis
    • Elasticsearch
      DevOps Tools
    • Git
    • Git Actions
    • Docker
    • K8S
    • AWS
      Communication Protocols
    • Protobuf
    • GraphQL
    • REST
    • gRPC

  • Chinese
    Native
  • Spanish
    Fluent
  • English
    B2