Senior Backend Engineer

LOCATION:

Hybrid: Boston, USA

About the role

Proxet is seeking a Senior Backend Engineer to join our team building mission-critical, data-driven, defense analytics applications. This is a hands-on role requiring strong backend technical depth, builder mindset, leadership experience, excellent communication skills, and comfort working cross-functionally with stakeholders and client engineering teams.

About the project

Our client is a U.S.-based software company specializing in defense analytics. Its flagship platform leverages artificial intelligence and integrated data to modernize and accelerate the defense acquisition process. The company serves as a strategic technology partner to the U.S. government in support of national security initiatives.

Location‍

Hybrid - Boston, US.

Requires US citizenship and hybrid work from the Newton office 3 days per week, with occasional travel to Pittsburgh.

Who are we looking for?

Skills & Experience

• Must be a US citizen and reside in the US
• B.S./M.S. in Computer Science or a related technical field
• 8+ years of software engineering experience (3+ years in a senior backend role)
• Expert at using AI tools (e.g., Claude Code) to accelerate development, refactoring, migration generation, and performance tuning
• Deep expertise in Java 17+, modern frameworks (Quarkus/Spring Boot) and reactive programming. Python experience is a plus.
• Mastery of PostgreSQL and ORMs (Hibernate)
• Strong communication and presentation skills

Responsibilities

- Design, build, and maintain high-throughput, backend solutions by engineering non-blocking, reactive backend services
- Leverage modern AI-assisted development tools (e.g. Claude Code) to accelerate delivery velocity while maintaining architectural integrity and system performance
- Drive excellence in backend system design and performance through lead-by-example ownership, comprehensive code reviews, and best practices
- Partner cross-functionally to drive clarity of business requirements and translate into technical solutions
- Champion the client’s long-term strategic success, making key decisions on performant system
design, scalable cloud-native solutions, and AI-augmented development patterns that bridge the
gap between complex system design and rapid business scale

What we offer

#### WORK:

• Flexible working hours;
• Collaborative, friendly team environment;
• Remote/Hybrid work;

#### LIFE:

• Company social events;
• Annual corporate parties;

#### HEALTH:

• Comprehensive medical insurance;

#### EDUCATION:

• Allowances for professional education;
• English language courses with native speakers;
• Internal knowledge-sharing sessions.

About Proxet

Proxet is a professional software development firm trusted by clients from around the world. With our expertise in AI and machine learning, we help businesses reimagine their possibilities and transform ideas into tangible digital solutions. By providing core services with an emphasis on data practices, we shape the future, one step at a time.