ZECHAO JIN

Profile

Accomplished backend engineer with 8 years of proven impact in Golang, microservices, and distributed systems. Renowned for driving backend innovation, optimizing performance, and elevating team productivity. Adept at DevOps and full-stack collaboration to deliver robust, scalable solutions.

Experience

- BLP-Digital

📍 Remote

AI-driven platform automating ERP workflows

Senior Backend Engineer (Golang/Javascript)

Sep. 2025 - Present
  • Design and implement new features based on customer requests, work closely with Product and Frontend teams to deliver high-quality solutions.
  • Took the initiative to implement workflow automation with Cursor by Design, significantly increasing development velocity and team efficiency.

Tech stack: Golang, OpenAPI, Docker, K8S, MySQL, Protobuf, GitHub Actions

- AREX Markets and Bankable

📍 Remote

Lending platform for SMEs

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.

Tech stack: Golang, Vue, Protobuf, Docker, K8S, AWS SQS/SNS, AWS S3, Postgres, Datadog

- TravelgateX

📍 Palma de Mallorca

Global B2B travel marketplace

Backend Engineer (Golang)

Apr. 2018 - May. 2021
  • Developed high-performance HotelX microservices in Golang for hotel search, booking, and static data, supporting over 7B+ 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 in C#, ensuring robust connectivity for the TravelgateX network.

Tech stack: Golang, C#, Elasticsearch, Redis, Consul, Protobuf, Prometheus, GraphQL, Docker, Grafana

Education

Bachelor of Computer Science, Universitat de les Illes Balears (2013 - 2019)

Master of Data Science, Universitat Oberta de Catalunya (2020 - 2022)