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Lenin Hasda

Passionate Senior Backend Engineer with 10+ years of experience

Interpersonal Skills

Communication: Effective in both verbal and written communication, ensuring clarity and understanding.

Problem Solving: Skilled at breaking down large, complex problems into manageable tasks with clear milestone.

Ownership: Have an end-to-end ownership mindset, proactively taking responsibility and ensuring successful deliveries.

Team Collaboration: Proven ability to work effectively in team settings, fostering a cooperative and productive environment.

Hard Skills

Language: Golang · PHP · JavaScript

API: gRPC · REST · Swagger / OpenAPI Spec

Database: PostgreSQL · MongoDB · Redis · ElasticSearch · Sphinx / Manticore

Messaging: RabbitMQ · Kafka

Deployment: Docker · Kubernetes · Helm · AWS · Terraform · Github Actions

Monitoring: Prometheus · Grafana · Loki / Graylog / Kibana · Jaeger / Honeycomb

Experience

Senior Software Engineer at HelloFresh SE Jul 2020 - Jun 2024

  • Worked closely with stakeholder to analyze requirements, leading and delivering the final product
  • Lead the deprecation of legacy SphinxSearch system to ElasticSearch based system reducing downtime and improving overall search speed
  • Decoupling, revamping & improving old internal tools to have better UX, scale & maintainability
  • Successfully launched customer facing tool that contributes in reducing customer handling cost
  • Improving agile work process to better estimate team capacity and enhance confidence
  • Sharing Go knowledge, best practices and mentoring teammates
  • Mentoring mid level Engineers (cross-team)
  • Regularly participating in on-call rotation

Tech: Golang · gRPC · REST Api · PostgresSQL · Docker · Kubernetes · ElasticSearch · RabbitMQ · Kafka · AWS

Software Engineer at Sixt SE Oct 2019 - Mar 2020

  • Development, maintenance of existing service that handles customer data
  • Add new service to enable third-party corporate login
  • Improve code quality and architecture
  • Introduced Dev sessions to discuss existing codebase, process & share learning

Tech: Golang · Go-Micro · RPC · REST Api · PostgresSQL · Docker · Kubernetes · RabbitMQ

Software Engineer at CodersRank Sept 2018 - Jun 2019

  • Refactored and added new features to existing services
  • Improved code base and optimized search
  • Built internal tools to analyze user base and their data
  • Built Microservice in Go for new functionality
  • Frontend development with Vue.js and TypeScript
  • Various R&D for possible new solutions

Tech: Golang · gRPC · REST Api · MongoDB · ElasticSearch · Vue.js · TypeScript · Docker · Docker-Swarm · Gitlab · DigitalOcean

Software Engineer at Pathao Ltd. Jun 2017 - Aug 2018

  • Refactored Pathao Ride sharing PHP/Laravel monolith app to microservice
  • Developed Pathao Pay to deliver Mobile Banking for it's 300K user base
  • Developed a learning based routing algorithm to filter failed GPS Data
  • Made Map Visualizer using GPS data for failed and corrected path

Tech: Golang · gRPC · REST Api · Payment Gateway · MongoDB · ElasticSearch · RabbitMQ · Redis · PHP · Laravel · JavaScript · Nodejs · Docker · Kubernetes · Gitlab · GCP · DigitalOcean

Software Engineer at Ice9 Interactive. Dec 2014 - Dec 2016

  • Developed largest Travel Booking platform in Bangladesh using Laravel
  • Developed e-commerce platform for publishing ebooks
  • Managed and customized existing application as clients required
  • Build custom web application in Laravel from scratch
  • Developed various small applications using Wordpress and Yii2

Tech: PHP · Laravel · MySQL · MongoDB · CouchDB · Redis · Yii2 Framework · JavaScript · Angular.js · Nodejs · Express Framework · WebSocket · REST Api · DigitalOcean

Freelance Web Developer at Upwork Jan 2012 - Nov 2014

  • Client requirement analysis
  • Develop markup for web application in HTML, CSS from PSD file
  • Creating and customizing jQuery and AJAX scripts
  • Customizing WordPress based themes and plugins
  • Develop custom application (Hotel Management and directory system) using raw PHP, MySQL and JavaScript

Tech: HTML · CSS · BootStrap · JavaScript · jQuery · PHP · MySQL · WordPress · themes and plugins

Education

MS in Computer Science 2016 - 2017

Jahangirnagar University
Dhaka, Bangladesh

BSC in Computer Science & Engineering 2010 - 2014

East West University
Dhaka, Bangladesh