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SD Solutions is a global recruitment and staffing agency that manages job postings and talent acquisition on behalf of clients like Tipalti and Torq.

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Posted 2w ago

FinTech Client #5 | Python Tech Lead

@ SD Solutions
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Warsaw, Masovian Voivodeship, Poland
HybridFull Time
Responsibilities:leading backend, designing architecture, mentoring engineers
Requirements Summary:7+ years backend experience with 2+ years technical leadership; expert Python and async frameworks (FastAPI/Flask), WebSockets, SQL/NoSQL, cloud (AWS/GCP/Azure), Docker, Kubernetes, CI/CD and mentoring skills.
Technical Tools Mentioned:Python, FastAPI, asyncio, Flask, WebSockets, GraphQL, RESTful, DynamoDB, AWS, GCP, Azure, Docker, Kubernetes, GitHub Actions, Prometheus, Sentry, ELK, Firebase, Mixpanel, React Native, Flutter
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Job Description

On behalf of FinTech Client #5, SD Solutions is looking for a talented Python Tech Lead to lead the backend engineering effort behind a nationally trusted mobile payment platform.

We are seeking an experienced Tech Lead with a passion for building robust, scalable systems that support high-concurrency, real-time mobile applications. In this role, you'll lead a small, empowered team responsible for designing and implementing the core backend services that power the NDA platform, while also driving technical direction, mentoring engineers, and making key architectural decisions. This is a rare opportunity to lead an end-to-end rebuild of a nationally trusted service — using modern tools, architecture, and development practices from day one.

SD Solutions is a staffing company operating globally. Contact us to get more details about the benefits we offer.

Responsibilities:

  • Lead the design and architecture of scalable backend services using Python and modern frameworks (e.g. FastAPI)
  • Define technical standards and best practices for building and maintaining RESTful and GraphQL APIs supporting SkyCash's iOS, Android, and web applications
  • Act as the primary technical point of contact between backend, mobile, and front-end teams to ensure seamless integration and optimal performance
  • Guide the team in building real-time features using asynchronous programming (e.g. asyncio)
  • Make architectural decisions on SQL and NoSQL database usage for storing and processing large volumes of transactional data
  • Own system reliability and performance under high user load and concurrency, including capacity planning and incident response
  • Establish and oversee CI/CD pipelines using tools like GitHub Actions, Docker, and Kubernetes
  • Set and enforce code quality standards — clean, testable, maintainable code following modern development best practices
  • Mentor and support engineers on the team, conducting code reviews and technical guidance
  • Take ownership of the technical roadmap, from architecture through production readiness
  • Champion the adoption of AI tools to optimize team workflows and productivity

Requirements:

  • 7+ years of backend engineering experience, including 2+ years in a technical leadership or lead role, especially designing high-scale mobile-connected APIs
  • Expert-level Python skills, deep experience with asynchronous programming and frameworks like FastAPI, Flask, or similar
  • Strong track record architecting real-time communication solutions such as WebSockets
  • Deep understanding of client-server architecture and API design principles, with experience setting these standards for a team
  • Strong experience with both SQL and NoSQL databases (DynamoDB experience is a plus)
  • Proven experience with cloud platforms (AWS, GCP, or Azure) and serverless architecture at scale
  • Strong background in containerization (Docker) and CI/CD pipeline design
  • Demonstrated ability to advocate for and enforce code quality, including unit/integration testing and automated pipelines
  • Proven leadership skills — able to guide, mentor, and unblock a small, autonomous team
  • Comfortable owning technical decisions and their outcomes in a fast-paced, flexible environment
  • Open to working 3 days/week onsite at our Polish office

Advantages:

  • Experience leading migrations from Java-based systems to Python
  • Familiarity with mobile analytics tools like Firebase, Mixpanel, etc.
  • Experience collaborating with and guiding mobile developers (native or React Native/Flutter)
  • Strong understanding of monitoring tools (Prometheus, Sentry, ELK)
  • Contributions to open-source projects or active participation in developer communities

About the company:

A leading mobile payments platform serving millions of users across urban mobility services — including transportation ticketing, parking, and digital top-ups — through a single consumer app. The company is undergoing a major platform overhaul, migrating from legacy infrastructure to a scalable Python-based architecture with real-time processing and AI-driven components.

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