#133115 - Senior Full-Stack Engineer - Data-Driven Workflow Applications

Lifted (an Upwork Company); Colombia; Remote; COP 267,530,000 - 401,295,000; Full time

Job summary

Lifted (an Upwork Company) is seeking a Senior Full-Stack Engineer to architect and build production web applications that connect data-backed services with intuitive frontend interfaces. You will be an early core engineer shaping architecture and coding standards.

You will develop backend services with Java or Python, React/TypeScript frontend, and AWS-based deployment, delivering reliable data movement and scalable systems in a contract, remote LATAM setup through March 31, 2027.

Qualifications

• 5+ years of hands-on software development using Java or Python.
• 5+ years building backend services, APIs, or other data-driven applications.
• 5+ years working with datastores such as MySQL, PostgreSQL, MongoDB, or comparable technologies.
• 4+ years building production applications with both React and TypeScript.
• Strong HTML, CSS, and modern JavaScript (ES6+) skills.
• Experience with REST or GraphQL APIs, RPC-style communication, and JSON-based integrations.
• Production cloud experience with a strong focus on AWS.
• Experience leading code reviews and improving software quality.
• Evidence of tangible impact from personally delivered engineering work.
• A technical bachelor's degree.
• Ability to operate as an early core engineer by shaping architecture, establishing coding standards, and guiding peers while remaining hands-on.

Responsibilities

• Architect and build full-stack applications for data-driven operational workflows.
• Develop backend APIs, microservices, workflow orchestration, automated triggers, and system synchronization.
• Build production frontend experiences with React and TypeScript.
• Establish architecture patterns, coding standards, and maintainable engineering practices as an early core team member.
• Lead code reviews, guide peers, and contribute directly to hands-on implementation.
• Diagnose reliability and performance issues across applications, services, integrations, and datastores.
• Deliver measurable improvements to product capability, operational efficiency, or system quality.

Skills

Java

Python

Backend APIs

Datastores

React

TypeScript

HTML/CSS/JavaScript

AWS

REST/GraphQL

Code reviews

Bachelor's degree

Education

Bachelor's degree

Tools

PostgreSQL

MySQL

MongoDB

GraphQL

REST

Kafka

Apollo

Jest

Webpack/Vite

Job description

We are seeking a Senior Full-Stack Engineer to architect and build production web applications that connect data-backed services with intuitive frontend interfaces. The work will enable self-service operational processes, workflow automation, system integrations, and reliable data movement. As an early core engineer, this person will establish software foundations, deliver end-to-end solutions, and help raise engineering standards.

Key Responsibilities

• Architect and build full-stack applications for data-driven operational workflows.
• Develop backend APIs, microservices, workflow orchestration, automated triggers, and system synchronization.
• Build production frontend experiences with React and TypeScript.
• Establish architecture patterns, coding standards, and maintainable engineering practices as an early core team member.
• Lead code reviews, guide peers, and contribute directly to hands-on implementation.
• Diagnose reliability and performance issues across applications, services, integrations, and datastores.
• Deliver measurable improvements to product capability, operational efficiency, or system quality.

Must-Have Skills

• 5+ years of hands-on software development using Java or Python.
• 5+ years building backend services, APIs, or other data-driven applications.
• 5+ years working with datastores such as MySQL, PostgreSQL, MongoDB, or comparable technologies.
• 4+ years building production applications with both React and TypeScript.
• Strong HTML, CSS, and modern JavaScript (ES6+) skills.
• Experience with REST or GraphQL APIs, RPC-style communication, and JSON-based integrations.
• Production cloud experience with a strong focus on AWS.
• Experience leading code reviews and improving software quality.
• Evidence of tangible impact from personally delivered engineering work.
• A technical bachelor's degree.
• Ability to operate as an early core engineer by shaping architecture, establishing coding standards, and guiding peers while remaining hands-on.

Nice-to-Have Skills

• Billing-system experience.
• Service-oriented or event-driven architecture experience.
• Frontend GraphQL experience, including Apollo or comparable tooling.
• Experience with Kafka, Amazon SQS, RabbitMQ, or comparable messaging systems.
• Design-system or reusable component-library experience.
• Jest and React Testing Library experience.
• Webpack or Vite experience.
• Web accessibility experience, including WCAG.
• Strong production debugging and troubleshooting experience.
• Experience with large-scale or high-performance systems, including consistency, scalability, replication, or redundancy concerns.
• Enterprise experience strongly preferred.

Required Tools and Platforms

• Java or Python.
• React and TypeScript.
• HTML, CSS, and modern JavaScript.
• REST or GraphQL, RPC, and JSON.
• AWS.
• MySQL, PostgreSQL, MongoDB, or comparable datastores.

Location Time and Engagement

• Candidates must be based in LATAM.
• Full US Central Time coverage is required.
• This is a contract engagement at 40 hours per week.
• The anticipated engagement runs through March 31, 2027.
• This is not currently a contract-to-hire opportunity.