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Diego – Typescript, React, Next.js, experts in Lemon.io

Diego

From Brazil (UTC-3)flag

Full-stack Web Developer|Strong senior
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Diego – Typescript, React, Next.js

Diego is a calm, thoughtful, strong senior full‑stack developer who structures his thoughts well and takes real ownership of his work. He is comfortable talking directly to clients, digs into real user problems before coding, and makes pragmatic, product‑first decisions under time- and scope-constrained conditions. We see him as a strong fit for product teams that need a senior who can think about architecture, handle complexity, and still stay close to business value.

9 years of commercial experience in
AI
Banking
Cryptocurrency
Fintech
Productivity
Sports
Mobile apps
Main technologies
Typescript
5 years
React
8 years
Next.js
3 years
Node.js
4 years
Additional skills
Golang
gRPC
GraphQL
AWS
Kubernetes
Terraform
.NET Core
MongoDB
PostgreSQL
Nest.js
OpenAI
Direct hire
Possible
Ready to get matched with vetted developers fast?
Let’s get started today!

Experience Highlights

Full-Stack Web Developer
Jul 2025 - Ongoing8 months
Project Overview

Internal meeting‑intelligence platform that centralizes analysts’ notes from founder calls, combining real-time Zoom transcription with AI-generated summaries, key decisions, and follow-ups to reduce manual note-taking and context loss across the deal pipeline.

Responsibilities:
  • Designed and led the end-to-end architecture of the internal notes platform, coordinating frontend and backend systems;
  • Built a real-time auto-save note editor to ensure users never lost meeting notes;
  • Integrated Zoom and Deepgram to deliver live meeting transcriptions within the application;
  • Integrated OpenAI to generate AI-powered meeting summaries and suggest follow-up topics for analysts;
  • Developed AI-assisted form autofill using context from meeting transcriptions and analyst notes;
  • Implemented full-text search for notes and meeting transcriptions using PostgreSQL GIN indexes to improve query performance.
Project Tech stack:
Next.js
OpenAI
Nest.js
Typescript
Prisma
PostgreSQL
Full-Stack Web Developer
Dec 2022 - Ongoing3 years 2 months
Project Overview

Company data API powering fast search and discovery across a catalog of 6M+ companies, with advanced filtering and optimized PostgreSQL queries to surface the most relevant results in milliseconds.

Responsibilities:
  • Developed Company API in NestJS, which is a REST API that provides information about companies and their financials;
  • Got 6x speed-up on the Company API by updating an old SQL query (used to take 30 seconds, now takes 5 seconds);
  • Got 10x speed-up after adding an in-memory caching layer to the Company API. (from 5 seconds to 500ms with cache hit);
  • Used Next.js to create a new app that displays all companies that Insight Partners has invested in.
Project Tech stack:
Nest.js
Typescript
TypeORM
PostgreSQL
ElasticSearch
AWS
Next.js
Full-Stack Web Developer
Feb 2022 - Dec 202210 months
Project Overview

Institutional crypto trading and custody platform used by B2B clients to buy, sell, and convert digital assets at scale, including fee-free USD→USDC conversions and portfolio tools tailored for funds, corporates, and treasury teams.

Responsibilities:
  • Implemented the Conversion feature for Prime, which enabled users to convert USD to USDC with no fees;
  • Migrated some endpoints from a legacy Ruby system to a new Go service, getting up to 100x speed-up;
  • Developed internal tools that would allow the Coinbase Backoffice team to perform transactions on behalf of its users.
Project Tech stack:
React
Typescript
Golang
GraphQL
gRPC
MongoDB
Software Developer
Oct 2021 - Feb 20224 months
Project Overview

Public Prime APIs that allow institutional Coinbase clients to programmatically integrate trading, custody, and real-time market data into their own systems, enabling automated workflows and native crypto features in B2B platforms.

Responsibilities:
  • Developed some of the Transactions and Wallets;
  • Added an authentication layer to the Web Sockets API so users could securely authenticate to it;
  • Documented some changes to the Changelog so customers would have a clearer understanding of what features/bugfixes/changes would be realized in the new version;
  • Created an E2E test runner that would generate integration tests based on a Swagger file.
Project Tech stack:
Golang
Web Sockets
gRPC
REST API
Software Developer
Feb 2021 - Oct 20218 months
Project Overview

Digital banking and financial operations platform built for accounting firms, giving their SME clients a single place to manage bills, invoices, user permissions, and daily cash‑flow tasks with banking‑grade security.

Responsibilities:
  • Implemented the integration of external banking APIs, enabling users to see their balances, pay their taxes, and perform financial transactions;
  • Improved the security and usability of our infrastructure as code (Terraform), by adding a S3 backend;
  • Developed the authentication and authorization service that would allow the account admin to manage access from all other accountants.
Project Tech stack:
Golang
AWS
Terraform
Kubernetes
CircleCI
Co-Founder/Software Developer
Aug 2020 - Mar 20217 months
Project Overview

Mobile fitness app that lets users auto‑generate personalized workout plans and track their progress over time with simple logs and visual progress feedback.

Responsibilities:
  • Architected and developed the tech stack, choosing which technology to use and implementing everything from scratch;
  • Integrated with the Stripe API so users could subscribe to the premium services;
  • Developed the technical aspect of the pitch and presented the final product to potential investors.
Project Tech stack:
.NET Core
React
Stripe API
Heroku

Education

2018
System Analysis and Development
Associate Degree

Languages

English
Advanced

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