
Principal Engineer (Python)
at FinTech product company from UK,
Your Responsibilities:
- Own the backend stack – Python based, that powers our product
- Collaborate with Data Scientists, Backend Developers(Node.js), Front-end developers, DevOps to design and implement new features
- Build and maintain several Backend Jobs and REST’ful Services which will be used internally in a Macroservices/Distributed services environment.
- Deploy and monitor the Jobs and endpoints ensuring availability and scalability(ability to handle 100X data processing load)
- Work on full project lifecycle starting from requirements gathering/understanding the problem to deploying and maintaining the project.
Skills that you bring Along:
- A minimum 8+ years of extensive work experience with Python and related frameworks – particularly Flask.
- Extensive experience in designing and scheduling backend Python jobs
- Hands on working in different file formats like Json, Parquet, csv etc. coming from Data Science side.
- Extensive experience with databases such as Postgres and Mongo.
- Extensive experience in Cloud Infrastructure (AWS based) – e.g. AWS API Gateway, Lambda Functions etc.
- Experience with cache like Redis and/or Memory cache
- Good experience in Microservices/Macroservices or Event driven Architectures
- Good experience with design patterns
- Experience in writing advanced SQL-queries, good knowledge of PL/SQL
- Good understanding of Software Design Principles and domain-driven design
- Good experience with Continuous Delivery and Containerization(Docker)
- Good experience in designing and maintaining REST’ful API endpoints
- Ideally maintaining infrastructure-as-code using Terraform
- Ideally experience in parallel data processing and building end-to-end Data Pipelines using tools such as Airflow/Prefect and Spark/Dask
- Excellent communication skills and the ability to explain complex topics in a simple manner

Similar jobs
We are looking for a backend developer to be a part of the OneFin engineering team and help us build functional systems and deliver customized software solutions for clients.
https://forms.gle/WrQiW6bZpro7oe6R6
Responsibilities
- Design and implement backend infrastructure and APIs.
- Write high-quality, robust, readable, and scalable code.
- Build responsive, robust, and optimized applications.
Requirements and Qualifications:
- Proficiency in Python, with a solid understanding of Django, Celery, and Redis.
- Bachelor’s degree in computer science, engineering, or a related field.
experience in Python, Django, Flask, and related frameworks in Unix/Linux or Windows
environment.
Hands-on experience in a full-stack python application development.
Design and develop Python web applications adhering to microservices framework considering
performance and ability to scale on demand.
Good experience working with RDBMS (Relational Database Management System).
Experience with Microservices architecture, containers & Docker based applications. Experience in
developing web applications and REST APIs using Flask/Django Framework (JSON, XML, etc.)
Experience working on Apache HTTP/HTTPS or any other webapp servers.
Package code and create executables/binaries in python.
Experience in Pandas, SciPy, NumPy, Pandas libraries.
Strong unit testing and debugging skills good understanding of threading limitations of Python, and
multi-process architecture.
Experience in managing the Source Code Base through Version Control tool like SVN, Git, and
Bitbucket, etc.
Thorough Understanding of OOPS concepts.
Experience working in an Agile development environment.
Good understanding of database (PostgreSQL/MySQL/Oracle/SQL Server).
Good communication and organization skills, with a logical approach to problem solving, good time
management, and task prioritization skills.
Requirements: Skills and Qualifications
8-10 years of experience in Python, Django, Flask, and related frameworks in Unix/Linux or Windows
environment, preferably in banking domain.
Language: Python
Frameworks: Django, Flask.
Libraries: Sqlalchemy, NumPy, SciPy and Pandas…Etc.
OS: Windows, Linux/Unix
Version Controls: Git, and Bitbucket.
Databases: MySQL, Oracle, SQL Server, PostgreSQL.
Containers: Docker
Note - Urgently looking for people serving Notice Period Or Immediate Joiners
- Programming Language: Python (Strong knowledge)
- Concurrency & Parallelism: Multithreading, Multiprocessing, AsyncIO, ThreadPoolExecutor, Future, concurrent.futures
- Memory Management: Reference Counting, Global Interpreter Lock (GIL)
- Distributed Computing: Dask, Apache Spark (Preferred)
- Data Processing: NumPy
- Inter-Service Communication: GRPC, REST API
- Containerization & Orchestration: Docker, Kubernetes
- Software Development Practices: Code Optimization, Debugging, Performance Tuning
- Communication & Problem-Solving: Technical Documentation, Team Collaboration, Asking for Clarity When Needed
Skills And Expertise
- Python,
- Multithreading,
- Multiprocessing,
- Dask, Apache Spark,
- NumPy,
- REST API,
- Docker,
- Kubernetes,
- Code Optimization
Job Responsibilities
- Should have experience in Software Product Development at an enterprise level. .
- Analyze requirements and come up with possible solutions to solve the problem, evaluating and capturing necessary tradeoffs
- Build and improve newest services and ensure that they are well tested and released quickly and often to our customers
- Debugging capabilities and identify the root cause of the problem and fix them.
- Influencing the architecture of an application.
- Design and implement cloud based high-performance, highly available services to cover customers’ high demands and big data volumes
- Maintain rapid deployment pipelines and observability of the services to support operations/troubleshooting.
- Think about security of the whole technical stack and processes to ensure customers’ data is safe
- Take care of all aspects of the product: from implementation, through testing, to operations.
Job Requirements
- Proficiency in Python programming
- Mandate experience working as a Python Developer with Django.
- Should have good experience in Flask, numpy and pandas
- Should have good experience in REST API development with Django.
- Have In-depth understanding of Object Oriented Programming ( OOPs ) concepts.
- Are Able to create Database Schemes that represent and support business processes.
- Should have good understanding of Agile frameworks such as Git, Jenkins etc.
- Must have experience working on MySQL, HTML, CSS, JavaScript & jQuery.
- Must have experience with Web Servers e.g. Nginx, Apache.
- Good to have AI/ML/Data science certification.
- Must be a fast learner and comfortable teaching yourself new skills and can thrive in a complex and fast-paced environment.
- Positive attitude and excellent communication as well as written skills
JOB DESCRIPTION
DYT - Do Your Thng, is an app, where all social media users can share brands they love with their followers and earn money while doing so! We believe everyone is an influencer. Our aim is to democratise social media and allow people to be rewarded for the content they post. How does DYT help you? It accelerates your career through collaboration opportunities with top brands and gives you access to a community full of experts in the influencer space.
RESPONSIBILITIES
- Expert in Python with knowledge of Python best practices (PEP8)
- Strong knowledge of python web frameworks such as Django, Flask • Strong knowledge of building RESTful APIs using Django Rest Framework • Good Understanding of Django ORM Libraries
- Able to integrate multiple data sources and databases into one system • Strong experience on Linux
- Solid database skills in a relational database (i.e. PostgresSQL,MYSql) • Able to create database schemas that represent and support business processes • Strong unit test and debugging skills
- Proficient understanding of code versioning tools (git)
- Experience deploying on AWS is desirable
- Experience with Docker,Test Drive Development will be a plus
- Excellent interpersonal, leadership, influence and communication skills • Experience in designing scalable micro-services is desirable
QUALIFICATIONS
- 0-1 years of experience as a backend developer
- At least one product build and published
- SKILLS Contribute in all phases of the development lifecycle
- Write well designed, testable, efficient code
- Work well under pressure and meet deadlines without sacrificing quality • Work with distributed development teams
- 8+ years of relevant work experience
- Well-versed in data structures, algorithms, and software design. Programming experience with at least one of
- Java or Python and object-oriented design
- Knowledge on SQL, NoSQL databases, Messaging/Caching technologies and AW deployments is a plus
- Exposure to the architecture and design (design patterns, security, reliability and scaling) of new and current systems. Experience in building highly scalable business applications, which involve implementing large complex business flows involving multiple third-party integrations
- Prior startup experience is a plus
Job Description:
Candidate must have 2 to 5-years of experience in various phase of development of a python-based application or API development.
Requirements:
Must Have: Strong expertise in PYTHON and its built-in data structures, developing API using flask or fastapi, data wrangling using standard python frameworks like pandas, NumPy etc., integration of various applications (third party or inhouse) with python.
Good to Have: Deployment using Nginx, GUnicorn, IIS, docker and Kubernetes etc. Good understanding of optimization solutions like differential evolution. Hands on experience with python packages like Scipy. Tkinter to make python-based applications.
Roles and Responsibilities:
- Understanding/gathering the requirements from stakeholder, formulating the problem, and leveraging AI/ML to solve the business problems.
- Integration of third party or in house application with python solution.
- Working on Deployment and optimization of various engineering problems using Numerical/Constraint optimization frameworks such as Differential Evolution and deploy a web-based API using Flask and Nginx/IIS.
- Unit testing of various python modules developed and testing of the API.
Responsibilities
- Team Management: Manage, lead and guide a team of backend developers and interns working under you.
- API Development: Designing, developing, and testing APIs for mobile and web applications by understanding technical specification docs & communicating with the stakeholders.
- Product Creation: Understanding the products and proposing and implementing product improvements
- Customer Management: Accurately translate user and business needs into functional backend code.
Requirements
- Fluency in Python
- Ability to lead and set an example
- Experience with FastAPI and/or Flask
- Basics of SQL and NoSQL databases
- A keen eye for improving and optimising code
- Experience with performance and optimization problems and a demonstrated ability to identify and address performance bottlenecks.
- Ability to work in a fast-paced startup environment is a must. Open source contribution is a plus.
Experience
- Backend Development: 2+ years
- Python: 2+ years
- FastAPI / Flask: 1+ year
- SQL / NoSQL databases: 3+ months
Open roles:
All roles are fully remote. You can be anywhere in the world to apply for these positions.
Designing and developing high-volume, low-latency applications for
critical systems and delivering high-availability and performance
• Contributing in all phases of the development lifecycle
• Writing well designed, testable, efficient code
• Test cases should be upto the mark
• Performance tuning knowledge is a must. Experience is an added advantage.
• In Backend – fundamentals of all languages is a must• Good hands-on software development experience with proven working experience
in Python development
• Expert in Python, with knowledge of at least one Python web framework (such
as Django, Flask)
• Familiarity with some ORM (Object Relational Mapper) libraries
• Able to integrate multiple data sources and databases into one system
• Understanding of the threading limitations of Python, and multi-process
architecture
• Strong unit test and debugging skills
• Basic understanding of front-end technologies, such as JavaScript, HTML5, and
CSS3
• Understanding of memory model/GC from performance point of view.








