Principal Architect

Ascendion Engineering

Bengaluru

On-site

INR 2,500,000 - 6,000,000

Full time

10 days ago

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Job summary

Ascendion invites a Senior Python Architect to design and implement robust REST APIs using FastAPI, while leading modernization of legacy Python services on AWS. You will drive architecture decisions, data modeling, and integration with React front end in a fast-paced, Fortune-grade engineering environment.

The role requires deep expertise in Python, PL/SQL, AWS services, and a proven track record as a senior architect, with a strong emphasis on scalable, reliable solutions and modern

Qualifications

Expertise in Python 3.10+ with strong design and OOP/functional fundamentals.
Deep experience with FastAPI, Pydantic, and ASGI servers.
Strong command of asyncio, async/await, and concurrency.
Expertise in PL/SQL, SQL, and Oracle database.
Hands‑on experience with AWS services like Lambda, ECS/EKS, RDS, S3, and IAM.
Full‑stack awareness and integration with React front end.
Proven track record in application modernization and migration.
Demonstrated experience as a solution/application architect.
Proficiency in Git/GitHub, CI/CD, automated testing, and containerization.
10+ years in software engineering with 4+ years in a senior architect role.

Responsibilities

Designing and building REST APIs with FastAPI.
Working with asynchronous programming and long-running job execution.
Reading, reverse-engineering, and translating large PL/SQL codebases.
Data modeling and query optimization in Oracle database.
Designing, deploying, and running Python services on AWS.
Integrating with React front end and maintaining clean API contracts.
Modernizing and migrating legacy systems to modern Python services.
Setting target-state design, NFRs, ADRs, and engineering standards.
Utilizing Git/GitHub, CI/CD, automated testing, and containerization.
Leading software engineering projects as a senior architect.

Skills

Python

FastAPI

ASGI

Asyncio

PL/SQL

Oracle

AWS

Git/GitHub

CI/CD

Containerization

React integration

Senior architect experience

Tools

Python 3.10+

Pydantic

SQL/PLSQL tools

AWS Lambda

ECS/EKS

RDS

S3/IAM

Git/GitHub

Job description

About Ascendion

Ascendion is a leader in AI-powered software engineering, helping businesses innovate faster, smarter, and with greater impact. We partner with Global 2000 clients across North America, UK, Europe, and APAC to solve complex challenges in data, experience design, software product engineering, and workforce transformation. Powered by expert engineers, thousands of AI agents, and our Engineering to the Power of AI™ (EngineeringAI) method, we deliver measurable outcomes that build trust, unlock value, and accelerate growth. Learn more at ascendion.com

Ascendion | Engineering to elevate life

We have a culture built on opportunity, inclusion, and a spirit of partnership. Come, change the world with us:

Build the coolest tech for world’s leading brands
Solve complex problems – and learn new skills
Experience the power of transforming digital engineering for Fortune 500 clients
Master your craft with leading training programs and hands‑on experience

Experience a community of change makers!

Join a culture of high-performing innovators with endless ideas and a passion for tech. Our culture is the fabric of our company, and it is what makes us unique and diverse. The way we share ideas, learning, experiences, successes, and joy allows everyone to be their best at Ascendion.

About the Role

Job Title: Senior Python Architect

Responsibilities