Java Developer (Digital Marketing domain)

Coherent Solutions; United States; Hybrid; USD 120,000 - 170,000; Full time

Benefits offered by this job

Health insurance

Flexible work options

Referral program

Training and conferences

Mentorship

Job summary

Coherent Solutions seeks a highly skilled Java backend engineer to join our global AdTech platform team in a hybrid/remote arrangement in the United States. You will develop high-performance, real-time DSP services that handle millions of requests per second, with a focus on low latency, scalability, and reliability.

Work closely with the Product team to translate business requirements into scalable software; design, implement, test, and deploy platform features; and contribute to distributed

Qualifications

• 5+ years of commercial experience in Java backend development focusing on scalable systems.
• Strong JVM knowledge, GC tuning, profiling, and performance optimization.
• Experience with distributed REST APIs, fault tolerance, scalability, and resilience.
• Hands-on with low-latency, high-throughput services.
• Experience with real-time streaming pipelines (Kafka or Kinesis).
• Solid data structures and algorithms background.
• Experience with Tomcat and web servers; good networking and load balancing understanding.
• Production experience with Docker and Kubernetes; Git and CI/CD pipelines.

Responsibilities

• Develop high-performance, large-scale DSP services and platform products.
• Collaborate with Product to translate requirements into technical solutions.
• Write clean, production-ready code with focus on throughput and latency.
• Design, test, and improve platform features for real-time processing.
• Contribute to distributed systems processing billions of transactions daily under SLAs.
• Improve test coverage, monitoring, automation, and observability.
• Participate in Agile processes and fast delivery cycles.

Skills

Java backend development

JVM performance tuning

Distributed REST APIs

Low-latency, high-throughput systems

Real-time streaming (Kafka/Kinesis)

Data structures and algorithms

Tomcat

Networking and load balancing

Docker and Kubernetes

Git and CI/CD

English communication

Tools

Kafka/Kinesis

Redis

S3

Tomcat

Docker

Kubernetes

Git

CI/CD (GitLab CI/CD)

Job description

Company Background

Our client is a global technology company transforming the way brands and agencies make marketing decisions. Its platform enables marketers to plan and activate cross-channel, programmatic media campaigns using real-time research, proprietary audience data, advanced analytics, and more than 150 integrated partners including Facebook, Instagram, Pinterest, Snapchat, and Twitter. The company operates across North America, Europe, the Middle East, Asia, and Australia.

Project Description

The role is focused on developing and modernizing real-time DSP serving services that process bid requests, deliver ads, integrate with third-party platforms, and record measurement events used for reporting and billing. The team works on high-throughput, low-latency systems processing millions of requests per second, with a strong focus on availability, data correctness, performance tuning, and scaling the platform for future growth. Current initiatives include splitting a monolith into microservices, improving deployment automation, and moving measurement pipelines from batch processing to real-time streaming with Kafka.

Technologies

• Java
• Kafka / Kinesis
• Redis
• S3
• Tomcat
• Docker, K8S
• Git, CI/CD

What You’ll Do

• Develop critical high-performance, large-scale services for DSP programmatic integrations and platform products;
• Work closely with the Product team to understand business needs and translate product requirements into technical solutions;
• Write clean, efficient, and production-ready code with a strong focus on high throughput and low latency;
• Design, develop, test, and improve new and existing platform features;
• Contribute to building large-scale distributed systems processing billions of transactions per day under strict SLAs;
• Improve test coverage, monitoring coverage, automation, and overall system observability;
• Follow Agile methodologies and work in a fast-paced engineering environment with quick delivery cycles;

Job Requirements

• 5+ years of commercial experience in Java backend development, with a focus on scalable backend systems;
• Strong knowledge of the JVM ecosystem, including garbage collection, profiling, and performance tuning;
• Experience with distributed REST APIs, fault tolerance, scalability, consistency, and resilience;
• Hands-on experience with low-latency and high-throughput services;
• Experience with real-time streaming pipelines using Kafka, Kinesis, or similar technologies;
• Strong knowledge of data structures and algorithms;
• Experience with web/application servers such as Tomcat;
• Solid understanding of networking and load balancing concepts;
• Production experience with Docker and Kubernetes;
• Experience with Git and CI/CD pipelines, such as GitLab CI/CD or similar tools;
• Interest in applying modern technologies and AI-assisted development tools;
• Readiness to participate in PagerDuty rotation (1 week per quarter);
• Strong verbal and written communication skills, including the ability to explain complex technical trade-offs to both technical and non-technical stakeholders;
• English: B2 or higher;

Nice To Have

• Prior experience in the AdTech industry;
• Familiarity with Python or Scala;

What Do We Offer

The global benefits package includes:

• Technical and non-technical training for professional and personal growth;
• Internal conferences and meetups to learn from industry experts;
• Support and mentorship from an experienced employee to help you professional grow and development;
• Health insurance;
• Sports activities to promote a healthy lifestyle;
• Flexible work options, including remote and hybrid opportunities;
• Referral program for bringing in new talent;
• Work anniversary program and additional vacation days.