Job Description

We are seeking an experienced

Lead API Developer

to architect and build a

next generation mobile platform

for a professional

Football team client

, driving fan engagement, digital monetization, and seamless in stadium and remote experiences. This role offers a unique opportunity to shape an industry-leading application that blends

innovation, scalability, and real-time interactivity

.

Role Summary

As the Lead API Developer, you will own the

design, development, and delivery

of backend services powering the mobile app experience. You'll combine

deep technical expertise

in Python and FastAPI with strong architectural thinking to create robust, secure, and performant APIs that scale to millions of users. Working closely with front-end, mobile, and cloud engineers, you will define API standards, optimize data flows, and ensure operational excellence across environments.

Key Responsibilities

Design, implement, and maintain

high-performance RESTful APIs using

Python

and

FastAPI

. Architect scalable and maintainable backend systems, ensuring

fault tolerance

,

horizontal scalability

, and

low latency

. Apply

asynchronous programming

techniques (async/await) and leverage

Pydantic

for request/response validation. Define and enforce

API design standards

, versioning, and consistent documentation (OpenAPI/Swagger). Integrate and manage

third-party APIs

, ensuring compliance with security and rate-limiting constraints. Implement

OIDC/OAuth 2.0

for secure authentication and authorization flows. Collaborate with mobile, frontend, and DevOps teams to optimize

end-to-end system performance

and

deployment pipelines

. Leverage

AWS services

- ECS, ECR, CloudWatch, Secrets Manager, ElastiCache, and DynamoDB to build reliable and cloud-native architectures. Write comprehensive

unit and integration tests

with

Pytest

, and maintain high code quality and coverage. Contribute to CI/CD automation and ensure best practices for release management and observability.

Required Skills & Experience

Strong proficiency in Python

and production-grade experience with

FastAPI

(routing, dependency injection, middleware, async/await). Deep understanding of

RESTful API architecture

, HTTP protocols, and distributed systems design. Hands-on experience with

OIDC/OAuth 2.0

authentication flows. Strong knowledge of

API gateway

concepts, interservice communication, and load balancing. Proficiency with

AWS

(ECS, ECR, CloudWatch, Secrets Manager, DynamoDB, ElastiCache). Experience with

CI/CD pipelines

and DevOps workflows (GitHub Actions, Jenkins, GitLab CI, etc.). Solid grasp of

containerization

(Docker) and microservice deployment best practices. Strong collaboration, problem-solving, and communication skills and able to partner effectively with product and engineering teams.

Preferred Qualifications

Experience building APIs for

real-time mobile or fan engagement platforms

. Familiarity with

GraphQL

or

WebSockets

for live data delivery. Exposure to

observability and tracing tools

(e.g., Prometheus, Grafana, OpenTelemetry). Knowledge of

data caching strategies

for high-traffic APIs. Understanding of

event-driven architectures

using AWS EventBridge, SNS, or Kafka.

What do we offer you?

Attractive salary Large freedom and real influence No unhealthy competition, team approach to meeting challenges Remote-first, flexible working culture Company apartments in cool cities across Europe: work and enjoy a memorable getaway

About Us

We are a software house with 18 years of experience and a global portfolio of projects. We help businesses modernize, scale, and innovate through custom software solutions -- always with a focus on flexibility and quality. Our team embraces unconventional ideas and new technologies, delivering solutions that drive real impact. If you value professionalism, creativity, and a strong engineering culture, you'll feel at home here.

Job Type: Full-time

Pay: 45,000.00-102,000.00 per year

Experience:

API Development: 6 years (required)
Work Location: Remote