Senior Full-Stack Engineer

Stacksync; California (MO); On-site; USD 120,000 - 180,000; Full time

Job summary

Stacksync is seeking a Senior Full-stack Engineer to join a fast-growing team building enterprise integrations. You will own both backend and frontend work, delivering robust, scalable services that power complex customer workflows.

Ideal candidates combine deep Python and React experience with solid Postgres skills, and a track record of shipping features in high-pressure environments. This role emphasizes ownership, collaboration, and pragmatic problem-solving.

Qualifications

• Must be a full stack engineer with strong backend and frontend skills.
• Ambition and reliability are essential for joining a fast-growing team.
• Experience building scalable enterprise systems with customer focus.
• Ability to ship features and communicate clearly under pressure.

Responsibilities

• Build high-performance enterprise systems integration like never before.
• Collaborate across Python backend, React frontend and Postgres stack.

Skills

Python

React

Postgres

Designing real-time systems

AWS/GCP/Azure

Tools

AWS

GCP

Azure

Job description

Senior Full-stack Engineer

This opportunity IS for you if:

1. You are a FULL STACK ENGINEER (Do NOT apply if you are not a FSE).
2. You are an exceptional human, the idea of mediocracy is insulting to you
3. You want to build an industry-disruptive product
4. You build for customers / users and not for yourself, successful customers should be priority
5. AMBITION AMBITION AMBITION
6. You are reliable, honest, and committed
7. You understand the compounding effect of life, that working hard now yields disproportionate returns later
8. You previously founded a company or are a future founder
9. Your learning speed ranks in the top 5th percentile
10. You are comfortable with being uncomfortable — pressure makes diamonds

This opportunity IS NOT for you if:

1. You think "you know best!"
2. You think building a company is easy
3. You think that building one feature per day is enough

What you’ll do as part of our team?

Build high-performance enterprise systems integration like never before

Stack:

• Python backend
• React Frontend
• Postgres

Build and deliver things you thought impossible, because nothing is impossible!

Apply by replying to ALL of the following:

1. What excites you to build at Stacksync? (2 sentences max)
2. Your level on the following tech - 0 (never heard of it) to 10 (I coded the library by hand) along with one impressive example of your knowledge:
   1. Python
   2. React
   3. Postgres
   4. AWS/GCP/Azure ecosystems
   5. Designing real-time systems
3. Describe the most challenging project/task you’ve worked on:
   1. Context (1 sentence): What was the project about? What technologies, systems, or goals were involved
   2. Your precise contribution (max 2 sentences): What specific part did you own / design / implement?
   3. Why it was challenging (max 2 sentences): What made it technically complex (e.g., scale, performance, data consistency, architecture, team dynamics)?
   4. Key takeaways (max 2 sentences): What did you learn, both technically (tools, architecture, debugging, optimization, etc.) and in terms of soft skills (communication, leadership, collaboration, prioritization)?
4. What is one of the biggest bets you’ve taken in your life, a decision where you stepped out of your comfort zone to grow personally or professionally?

Let’s see if you’ve got what it takes to earn a seat on this ride with a top-tier team