Job VC
Middle/Senior Python Backend Engineer
Technologies
Description
On behalf of our Client from Scotland, Mobilunity is looking for a Backend Engineer
(Python / FastAPI) - Part time
Our Client is an early-stage startup building a modular back-end platform for managing digital service workflows, combining payments, task execution, and verification into one scalable ecosystem.
At the core of the product is an escrow-like mechanism powered by Stripe, where funds are released based on predefined completion and verification conditions. Their broader vision is to create reusable, API-first infrastructure with independent modules such as payments,
AI
-based task completion, location verification, and image evidence handling.
They are looking for a strong Backend Engineer
(Mid+ to Senior level)
to take ownership of the MVP back-end architecture and implementation. This is a part-time / project-based opportunity for someone who enjoys building systems from the ground up, making technical decisions, and delivering production-ready back-end solutions.
The ideal candidate is someone who has experience building:
Payment or fintech-related systems
API-heavy backend applications
Workflow/state machine-based systems
Modular or service-oriented architectures
The role requires someone who is comfortable working independently, making architectural decisions, and delivering production-grade backend code in an MVP environment.
Requirements:
Strong backend development experience in Python 3.12+
Experience with FastAPI or similar modern Python web frameworks
Proven experience designing and building RESTful APIs
Strong understanding of system design and scalable backend architecture
Experience with PostgreSQL (schema design, queries, migrations
Strong experience integrating Stripe API (PaymentIntents, webhooks, refunds)
Experience with authentication systems (JWT / OAuth2)
Experience with Docker / Docker Compose
Ability to implement unit and integration testing
Strong English communication skills
Nice to have :
Experience with SQLAlchemy / Alembic or similar ORM + migration tools
Experience with S3-compatible storage (AWS S3, Cloudflare R2)
Familiarity with
AI
integrations or external API orchestration
Experience with event-driven or audit-logging architectures
Exposure to geolocation or media upload systems
Experience using or integrating MCP (Model Context Protocol)
Experience in early-stage MVP / startup environments
In return we offer:
The friendliest community of like-minded IT-people
Open knowledge-sharing environment – exclusive access to a rich pool of colleagues willing to share their endless insights into the broadest variety of modern technologies
Mobilunity Medical Insurance program designed to attend our teams’ needs
Paid vacations and sick leaves, including 5 paid days per year that don’t require a sick note
Perfect office location in the city-center (900m from Lukyanivska metro station with a green and spacious neighborhood) or remote mode engagement: you can choose a convenient one for you, with a possibility to fit together both
No open-spaces setup – separate rooms for every team’s comfort and multiple lounge and gaming zones
English classes in 1-to-1 & group modes with elements of gamification
Neverending fun: sports events, tournaments, music band, multiple affinity groups
Come on board, and let’s grow together!
(Python / FastAPI) - Part time
Our Client is an early-stage startup building a modular back-end platform for managing digital service workflows, combining payments, task execution, and verification into one scalable ecosystem.
At the core of the product is an escrow-like mechanism powered by Stripe, where funds are released based on predefined completion and verification conditions. Their broader vision is to create reusable, API-first infrastructure with independent modules such as payments,
AI
-based task completion, location verification, and image evidence handling.
They are looking for a strong Backend Engineer
(Mid+ to Senior level)
to take ownership of the MVP back-end architecture and implementation. This is a part-time / project-based opportunity for someone who enjoys building systems from the ground up, making technical decisions, and delivering production-ready back-end solutions.
The ideal candidate is someone who has experience building:
Payment or fintech-related systems
API-heavy backend applications
Workflow/state machine-based systems
Modular or service-oriented architectures
The role requires someone who is comfortable working independently, making architectural decisions, and delivering production-grade backend code in an MVP environment.
Requirements:
Strong backend development experience in Python 3.12+
Experience with FastAPI or similar modern Python web frameworks
Proven experience designing and building RESTful APIs
Strong understanding of system design and scalable backend architecture
Experience with PostgreSQL (schema design, queries, migrations
Strong experience integrating Stripe API (PaymentIntents, webhooks, refunds)
Experience with authentication systems (JWT / OAuth2)
Experience with Docker / Docker Compose
Ability to implement unit and integration testing
Strong English communication skills
Nice to have :
Experience with SQLAlchemy / Alembic or similar ORM + migration tools
Experience with S3-compatible storage (AWS S3, Cloudflare R2)
Familiarity with
AI
integrations or external API orchestration
Experience with event-driven or audit-logging architectures
Exposure to geolocation or media upload systems
Experience using or integrating MCP (Model Context Protocol)
Experience in early-stage MVP / startup environments
In return we offer:
The friendliest community of like-minded IT-people
Open knowledge-sharing environment – exclusive access to a rich pool of colleagues willing to share their endless insights into the broadest variety of modern technologies
Mobilunity Medical Insurance program designed to attend our teams’ needs
Paid vacations and sick leaves, including 5 paid days per year that don’t require a sick note
Perfect office location in the city-center (900m from Lukyanivska metro station with a green and spacious neighborhood) or remote mode engagement: you can choose a convenient one for you, with a possibility to fit together both
No open-spaces setup – separate rooms for every team’s comfort and multiple lounge and gaming zones
English classes in 1-to-1 & group modes with elements of gamification
Neverending fun: sports events, tournaments, music band, multiple affinity groups
Come on board, and let’s grow together!