Senior Frontend Engineer - React/Ts For Bi Dashboards

Ushuaia Contenidos; Buenos Aires; Remote; ARS 85,158,000 - 149,026,000; Full time

Benefits offered by this job

Fully remote contractor

US time zone overlap

Job summary

Ushuaia Contenidos is seeking a senior full-stack developer to join a live product studio. You will work on workflow features, server-side APIs, and the React/TypeScript UI, in a remote team delivering four to five features per sprint.

You will review AI-generated specs, guide tools, and ensure code quality with reviews and feature flags. You will own one end-to-end area such as the task engine or migrations, while maintaining a live product.

Qualifications

• 4+ years building full-stack web applications with production releases.
• Experience in unfamiliar codebases and learning conventions quickly.
• Hands-on with workflow software, data access controls, and audit logs.
• Proficient in React, TypeScript, and SQL on Azure, with schema design.
• Daily use of AI coding tools with tests and CI behind it.
• Clear written and spoken English, and collaboration in sprints.

Responsibilities

• Join the team to build workflow features for a live product.
• Own end-to-end areas (e.g., task engine or migrations) without breaking live features.
• Review AI-generated specs, guide merges, and ensure quality through tests.
• Develop server-side APIs from Azure SQL up to the API layer and build React UI.
• Maintain code quality with reviews, feature flags, and CI/CD.

Skills

Full-stack web development

React

TypeScript

SQL on Azure

AI coding tools

English proficiency

Sprint-based development

Code review

CI/CD

Tools

Azure SQL

CI/CD

Git

Job description

Our client is a remote product studio that builds MVPs and custom software for startups and companies past the idea stage. Clients pay for each build, and a small team works in two-week sprints with AI coding tools used every day. Clients are startup founders and their teams, so developers explain tradeoffs to them directly.

They've been at it since 2020 and were profitable in 2025, with a 30% net margin. After building their own AI systems, they tripled monthly revenue with the same team size. Clients rate them 4.9 out of 5 in verified reviews, and the startups they build for have raised more than $25M in venture funding.

Your Role

You will join the team building workflow software for one of the studio's clients: a live product that needs new workflow features while the existing ones keep running. The client's own engineers commit to the same repo, so every new table, permission and workflow goes in next to code someone else is changing. The weight is on the server side, from the SQL database on Azure up through the API, and you also build the React and TypeScript screens that sit on top.

AI coding tools draft most of the specs, tests and migrations. You direct them, read every diff line by line, and answer for what merges. If you'd rather write most of the code by hand, this probably isn't the right seat.

You report to the studio's leadership and work day to day with the lead developer and the product manager, who sets the acceptance criteria for each sprint. Success means delivering four to five features per two-week sprint, each verified before merge, and owning one area end to end (such as the task engine or the legacy migration) without breaking a live feature.

You Bring

4+ years building full-stack web applications and releasing them to production

Experience working in a codebase you didn't write, learning its conventions before changing it

Hands-on work on workflow software where different user roles see different data, with approvals, task queues or state machines and an audit log or versioned history

React, TypeScript and SQL on Azure, including schema design and migrations

Daily use of Cursor, Claude Code or a similar AI coding tool on production work, with tests and CI behind it

Clear written and spoken English

Experience delivering in fixed-scope sprints with branches, code review and feature flags

Bonus Points

Work in a regulated setting such as finance, health or insurance

A migration from a legacy system, with reconciliation and duplicate review

Time as an outside vendor committing to a client's repo

Project rules, custom prompts or agent setups for AI coding tools that your team adopted

Spanish, since the platform is bilingual

What’s Offered

Fully remote contractor role from LATAM, full time at about 40 hours a week

Core hours in US time zones, so your day overlaps with the lead developer and the product manager

An area of the product to own end to end, with your schema designs reviewed by the lead developer and the client's engineers

A team where AI‑first delivery is already the daily routine, with tests, CI and feature flags as part of the normal process

A start in early November

Interview Process

• Intro Call: 30 minutes with atomic HR on your background and goals
• Leadership Screening: A short call, possibly with an async part first
• Product and Developer Conversation: How you take features from acceptance criteria to merge
• Take‑Home Test: One feature like the real scope, built and checked