Senior Full Stack Engineer (Java+React)

Nix; Boston (MA); Remote; USD 140,000 - 190,000; Full time

Benefits offered by this job

Flexible work format

Competitive salary

Career growth

Mentorship program

Tech talks

Education reimbursement

Company events

Job summary

Nix is seeking an experienced Senior Java Full Stack Engineer to join our development team in Boston, MA. You will lead architecture decisions for complex services and APIs, mentor peers, and translate business needs into scalable, secure solutions.

We value strong Java experience (Spring, microservices), React front-end, and a DevOps mindset with CI/CD, cloud or hybrid deployments, and a focus on reliability and performance.

Qualifications

• BSc in Software Engineering or BS in Computer Science, or equivalent practical engineering experience.
• 5+ years of hands-on software engineering, including significant experience in enterprise scale systems.
• Expert level Java experience, including Spring / Spring Boot / Spring Cloud, microservices, RESTful APIs, and integration-oriented architecture.
• 3+ years of front-end development experience, mainly React, with strong knowledge of modern JavaScript / TypeScript frameworks, component design, state management, and reactive UI patterns.
• Strong experience in distributed systems design, API-first architecture, service resilience, service discovery, circuit breaker patterns, scalability, observability, and performance tuning.
• Strong experience with TDD/BDD and automated testing using frameworks such as JUnit, Jasmine, Mockito, Protractor/Selenium, or equivalent modern tools.
• Solid DevOps mindset and hands-on experience with CI/CD, Jenkins or equivalent pipelines, automated quality gates, deployment automation, and production-readiness practices.
• Experience designing, developing, and deploying cloud/hybrid solutions in container-based environments such as Kubernetes or Cloud Foundry.
• Experience with Kotlin, functional programming, Java Streams, and modern JVM ecosystem practices - strong advantage.
• Self-starter with strong ownership, ability to prioritize complex work, drive decisions, and operate effectively in a rapidly changing environment.
• Excellent problem-solving skills, high engineering judgment, strong critical thinking, and ability to simplify complex technical challenges.
• Good English - verbal and written.

Responsibilities

• Lead architecture and design decisions for complex services, APIs, front-end capabilities, integration flows, and cloud-ready components.
• Guide other developers through pairing, code reviews, design reviews, mentoring, and hands-on technical leadership.
• Translate business needs into scalable, maintainable, secure, and testable technical solutions.
• Identify modernization opportunities, reduce technical debt, and improve system reliability, observability, performance, and deployment quality.
• Promote engineering excellence across teams: clean code, automation, testability, secure coding, reusable components, and clear technical documentation.

Skills

Java

Spring Boot

Microservices

RESTful APIs

React

TypeScript

Kubernetes

CI/CD

Jenkins

Testing (JUnit/Selenium)

Cloud familiarity

Observability

English communication

Education

BSc in Software Engineering

BS in Computer Science

Tools

Jenkins

Kubernetes

Cloud Foundry

JUnit/Selenium

Git

Job description

We are looking for an experienced Senior Java Full Stack Engineer to join our development team.

Our customer – integrated Shipping Services has set itself apart as an independent carrier with a fresh, unique approach. His strategy as a global niche carrier offers distinctive advantages to customers worldwide. We have created a smart, efficient network that ensures stable, reliable services, and we have made it our mission to focus on the needs of our customers, which stand at the heart of all our decisions. The main idea of our product operates in select trades, where it has a competitive advantage and where it can provide superior service. We maintain a flexible partnership approach with other major carriers, and our new line structure is a much-needed alternative to customers concerned about the current alliance-dominated market.

Responsibilities:

• Lead architecture and design decisions for complex services, APIs, front-end capabilities,
  integration flows, and cloud-ready components.
• Guide other developers through pairing, code reviews, design reviews, mentoring, and hands-
  on technical leadership.
• Translate business needs into scalable, maintainable, secure, and testable technical solutions.
• Identify modernization opportunities, reduce technical debt, and improve system reliability,
  observability, performance, and deployment quality.
• Promote engineering excellence across teams: clean code, automation, testability, secure
  coding, reusable components, and clear technical documentation.

Requirements:

• BSc in Software Engineering or BS degree in Computer Science, or equivalent practical engineering experience.
• 5+ years of hands-on software engineering experience, including significant experience in enterprise scale systems.
• Expert level Java experience, including Spring / Spring Boot / Spring Cloud, microservices, RESTful APIs, and integration-oriented architecture.
• 3+ years of front-end development experience, mainly React, with strong knowledge of modern JavaScript / TypeScript frameworks, component design, state management, and reactive UI patterns.
• Strong experience in distributed systems design, API-first architecture, service resilience, service discovery, circuit breaker patterns, scalability, observability, and performance tuning.
• Strong experience with TDD/BDD and automated testing using frameworks such as JUnit, Jasmine, Mockito, Protractor/Selenium, or equivalent modern tools.
• Solid DevOps mindset and hands-on experience with CI/CD, Jenkins or equivalent pipelines, automated quality gates, deployment automation, and production-readiness practices.
• Experience designing, developing, and deploying cloud/hybrid solutions in container-based environments such as Kubernetes or Cloud Foundry.
• Experience with Kotlin, functional programming, Java Streams, and modern JVM ecosystem practices - strong advantage. Ability to evaluate technology options, make architectural trade-offs, and communicate technical recommendations clearly to both engineering and management stakeholders.
• Self-starter with strong ownership, ability to prioritize complex work, drive decisions, and operate effectively in a rapidly changing environment.
• Excellent problem-solving skills, high engineering judgment, strong critical thinking, and ability to simplify complex technical challenges.
• Good English - verbal and written.

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits

*not applicable for freelancers