Senior Software Engineer (Java + Python)

Lineate; United States; On-site; USD 140,000 - 190,000; Full time

Benefits offered by this job

Career growth

Social benefits

Equipment provided

English lessons

Gym membership

Flexible vacation

Global IT company

Job summary

Lineate is seeking an experienced software engineer to join our ML-focused team in the United States. You will design and build scalable backend services in Java and Python, and develop data pipelines with PySpark to support production ML models.

You will collaborate with ML engineers on data preparation, transform large datasets for relevance optimizations, and contribute to system architecture. Ideal candidates have strong backend skills, large-scale data processing experience, and comfort

Qualifications

• 6+ years of commercial software development experience.
• Strong hands-on experience with Java and Python.
• Solid experience with Spark / PySpark or similar data processing frameworks.
• Proven experience building data pipelines and working with large datasets.
• Strong understanding of backend development, system design, and distributed systems.
• Experience with APIs and microservices.
• Good knowledge of data structures, algorithms, and performance optimization.
• Ability to work in hours close to the New York timezone (at least 6 hours overlap with NY team).

Responsibilities

• Design, develop, and maintain scalable backend services using Java and Python.
• Build and optimize data pipelines for large-scale data processing (primarily with PySpark).
• Collaborate closely with ML engineers to prepare and transform data for ML models.
• Work with large datasets to support search relevance and optimization systems.
• Improve system performance, scalability, and reliability.
• Contribute to architecture decisions and technical design.
• Write clean, maintainable, and well-documented code.

Skills

Java

Python

Spark / PySpark

Data pipelines

APIs

Microservices

Distributed systems

Algorithms

Tools

Databricks

AWS EMR

Hadoop

Spark ecosystem

Job description

About Lineate

Lineate is a US-based international software development company with over two decades of experience.

From Intelligent Document Processing(IDP) and Agentic RAG systems to scalable cloud architectures, we turn complex ideas into real, measurable results.

We deliver AI-driven custom solutions for FinTech, HealthTech, AdTech, and beyond, empowering businesses to grow smarter, faster, and more efficiently.

Our expertise falls into three main categories:

• Building Custom AI Solutions: Deploying high-impact, AI-enabled technology utilizing IDP, Agentic RAG.
• Cloud and Data Infrastructure: Optimizing business operations with our data management and cloud computing solutions.
• Team Augmentation: Providing specialized experts in FinTech, AdTech, and HealthTech to integrate seamlessly and accelerate project timelines.
• Our goal is not just to build technology, but to build the future operating model for our clients.

About the Role

You will join an established ML team working on search and relevance optimization. You will focus on building data pipelines and preparing data that powers ML models in production.

The role combines Java backend development and Python (primarily PySpark) for large-scale data processing.

Responsibilities

• Design, develop, and maintain scalable backend services using Java and Python
• Build and optimize data pipelines for large-scale data processing (primarily with PySpark)
• Collaborate closely with ML engineers to prepare and transform data for ML models
• Work with large datasets to support search relevance and optimization systems
• Improve system performance, scalability, and reliability
• Contribute to architecture decisions and technical design
• Write clean, maintainable, and well-documented code

Requirements (Must-have)

• 6+ years of commercial software development experience
• Strong hands-on experience with both Java and Python (required)
• Solid experience with Spark / PySpark or similar data processing frameworks
• Proven experience building data pipelines and working with large datasets
• Strong understanding of backend development, system design, and distributed systems
• Experience with APIs and microservices
• Good knowledge of data structures, algorithms, and performance optimization
• Ability to work in hours close to the New York timezone (at least 6 hours overlap with NY team)

Nice-to-have (at least one of the following)

• Experience with search and relevance optimization, including:
  Elasticsearch / Solr (lexical search)
  Semantic search, vector search, or RAG-based systems
  Search relevance tuning
• Experience supporting ML workflows, such as:
  Data preparation or feature engineering
  Recommendation systems or user behavior prediction
• Experience with Databricks (preferred) or similar environments:
  AWS EMR, Hadoop, Spark ecosystem

We offer:

• Freedom to Develop - equal opportunity to learn and grow professionally
• Clear career and professional path, strong performance management system
• Social Benefits Package
• Equipment
• English lessons
• Gym membership
• All the advantages of working in an international IT company
• Flexible vacation time
• Fun and inclusive in-person and digital events

Lineate is proud to be an Equal Opportunity Employer - We do not hire on the basis of race, colour, religion, creed, gender, national origin, citizenship, age, disability, veteran status, marital status, pregnancy, parental status, sex, gender expression or identity, sexual orientation, or any other basis protected by Georgian legislation. All employment is decided based on qualifications, merit, and business need.

Learn more about Lineate at our website: www.lineate.com