Senior Full-stack Engineer (Python + React)

Exciting Opportunities for Tech Talent – Find Your Perfect Role!

Referral bonus: $800

Recruiter at Ralabs

We’re looking for a Senior Fullstack Engineer (Python + React) to join a long-term project with a US-based SaaS client building an AI-powered communications platform for SMBs. You’ll help build a new outbound voice and messaging layer — a durable scheduled action queue, time-aware execution engine, Google Calendar-driven reminders and callbacks, stage-based follow-up sequences, and new firing modes for the outbound API. The work spans backend infrastructure and frontend configuration UI on top of a live production platform. Greenfield feature development, direct collaboration with the client’s product and engineering leadership, and roughly a year of follow-on work expected.

Project Idea

AI-powered voice platform for SMBs that automates lead qualification and appointment booking through intelligent phone conversations.

How many stages of the interview are there?

Interview with the Recruiter – up to 30 min.
Technical interview – 1 h.
PM call – 30 min.
Offer

Requirements and responsibilities

Must have:

5+ years of commercial experience as a Fullstack Engineer
Strong Python (backend services, APIs, async processing)
Solid React (modern hooks, TypeScript a plus)
Experience with multi-tenant SaaS, scheduled jobs / queues, and third-party API integrations (Google Calendar, SMS, voice — a plus)
Self-driven, comfortable working directly with the client
Upper-Intermediate+ English

Nice to Have

Familiarity with AI-powered or voice/messaging products is a plus – not required, but helps you understand the product context faster.

Key Responsibilities

Design and build backend services in Python (scheduled action queue, execution engine, calendar integration)
Extend the React-based admin UI for configuration and execution visibility
Integrate with Google Calendar, SMS, and voice providers
Collaborate directly with the client on scope, estimates, and technical decisions
Ensure code quality, reliability, and clear execution logging

We offer

Work vibe

Flexible full-time/part-time hours
No micromanagement—time logging is for accounting only
High-quality equipment (MacBook or your own device)
Dynamic, low-bureaucracy environment
Team events, swag, and a great crew to hang with

Holidays and leaves

20 days of paid annual vacation;
15 days of paid sick leaves;
Possibility to use vacation during probation;
Maternity and paternity leave;
Days off on all government holidays.

Education

$100 annual education allowance
Mentorship program—learn or lead
English lessons with biannual reviews
Certification cost reimbursement
Free access to Udemy courses on request

Perks

Social package: medical insurance, sports compensation, or psychological training
IT Club Loyalty card (Lviv IT Cluster)
No overtime—work-life balance matters
Transparent payments in EUR/USD, on time every month
Assistance with military reservation procedure