Senior Software Engineer (Java, React)

Salt; Amsterdam; Hybrid; EUR 60,000 - 90,000; Full time

Job summary

Salt in Amsterdam is seeking 2 Software Engineers (Java or React) for a 6-month, hybrid role. Start ASAP. You will build and scale high-impact systems across backend, frontend and data engineering, taking ownership of services end-to-end.

You’ll design, develop and maintain critical applications, drive quality through testing, and work with cross-functional teams to deliver reliable, secure solutions in production. Strong Java/React and problem-solving skills required.

Qualifications

• Proficient in Java and/or React with full-stack capabilities.
• Experience across backend, frontend, and data engineering is a plus.
• Experience building and scaling production systems and services.

Responsibilities

• Build & Deliver Software using Java/React.
• Develop high-quality applications with clean, reusable code.
• Refactor and improve existing systems using design patterns.

Skills

Java

React

Full-stack mindset

Production systems

Problem-solving

Independent in production

Job description

Software Engineer (Java or React) – Hybrid/Amsterdam

Duration: 6 months

Start: ASAP

We’re looking for 2 Full stack Engineers (React and Java) to join our team and help build and scale high-impact systems. This is an exciting opportunity to work across the full software development lifecycle, combining backend, frontend, and data engineering expertise while taking ownership of services end-to-end.

You’ll play a key role in designing, developing, and maintaining critical applications, contributing to architectural decisions, and driving continuous improvement. If you enjoy solving complex problems and working in a fast-paced, high-scale environment, we’d love to hear from you

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What You’ll Be Doing

• Build & Deliver Software
• Develop high-quality applications using Java as the primary language
• Write clean, maintainable, and reusable code using modern development practice
• Refactor and improve existing systems using appropriate design patterns
• Ensure high standards through robust testing and quality assurance practices
• Safeguard data security, integrity, and quality at all times

Own Systems End-to-End

• Take full ownership of services, from design through to production
• Monitor system health, performance, and reliability using meaningful metrics
• Deploy and operate applications in production environments
• Contribute to continuous delivery and experimentation frameworks
• Maintain documentation, runbooks, and operational procedures
• Respond quickly and effectively to live production issues
• Minimise customer impact and meet SLA commitments
• Conduct root cause analysis and implement long-term improvements
• Contribute to incident tracking and postmortems
• Contribute to Architecture
• Help shape technical solutions aligned with business and architectural goals
• Provide input into system design and challenge assumptions constructively
• Support teams in aligning with broader platform and architectural strategies
• Drive Better Solutions
• Analyse complex problems and identify patterns and root causes
• Propose and implement measurable improvements to systems and processes
• Continuously look for ways to enhance performance and efficiency
• Communicate clearly with both technical and non-technical stakeholders
• Work closely with cross-functional teams to deliver shared goals
• Actively listen, challenge ideas constructively, and drive alignment

What We’re Looking For Essential Skills

• Java – strong proficiency (primary language for this role)
• React - 2 - 3 years experience
• Full-stack mindset – experience across backend, frontend, and/or data engineering
• Experience building and scaling production systems
• Strong problem-solving and analytical skills
• Ability to take ownership and operate independently in production environments

Nice to Have

• Experience with Perl (or willingness to learn)
• Background in Data Engineering
• Experience with AWS or similar cloud platforms
• Exposure to AI/ML, with an interest in applying AI across the SDLC
• Previous experience as a Forward Deployed Engineer (FDE)