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Java Developer Startup Jobs in New York (NOW HIRING)

Adidev Technologies Inc

Junior IOS developer

Manhattan, NY · On-site

$56.75 - $78/hr

Hundreds of Fortune 1000 and innovative startup clients with thousands of successful projects ... Proficiency in Java and Kotlin (at least 1 year of experience). * Published at least 1 application ...

Adidev Technologies Inc

Junior IOS developer

Manhattan, NY

$56.75 - $78/hr

Hundreds of Fortune 1000 and innovative startup clients with thousands of successful projects ... Proficiency in Java and Kotlin (at least 1 year of experience). * Published at least 1 application ...

xAI

Member of Technical Staff - X Money

New York, NY · On-site

$180K - $440K/yr

... Java, and high volume streaming systems. * 2+ years of experience working on large scale consumer ... startup experience as a founding engineer, emphasizing rapid prototyping, user-centric design, and ...

Albireo Energy

BMS Programmer- HVAC Controls

Edison, NJ · On-site

$80K - $135K/yr

... startup and commissioning of large systems, such as AHUs, chiller plants, or other utilities ... C, C++, Java, VBA). Tridium system experience, preferred. * Thorough understanding of electrical ...

Albireo Energy

BMS Programmer- HVAC Controls

New York, NY · On-site

$80K - $135K/yr

... startup and commissioning of large systems, such as AHUs, chiller plants, or other utilities ... C, C++, Java, VBA). Tridium system experience, preferred. * Thorough understanding of electrical ...

Fortune

Salesforce Software Engineer

Manhattan, NY · On-site

$61 - $81/hr

Required : • Strong grounding in computer science fundamentals, programming (e.g., Java, C# ... a startup or lean team environment where you've been the primary Salesforce resource. • ...

Rogo

Staff Software Engineer: Backend

Manhattan, NY · On-site

... or Java). • You love writing highly performant and readable code that is well-tested. • 6+ ... engineer at a hyper-growth startup. • Experience in world-class product organizations (e.g ...

Albireo Energy

BMS Programmer- HVAC Controls

Edison, NJ · On-site

$80K - $135K/yr

... startup and commissioning of large systems, such as AHUs, chiller plants, or other utilities ... C, C++, Java, VBA). Tridium system experience, preferred. * Thorough understanding of electrical ...

Adaptive Security

Senior Software Engineer

New York, NY · On-site

$170K - $225K/yr

Adaptive is a cybersecurity startup on a mission to stop AI-powered cyberattacks. In December 2025 ... Strong development experience with modern, strongly-typed programming languages such as Java, C# ...

Geico

Staff Engineer- Machine Learning

New York, NY

$90K - $230K/yr

Ability to excel in a fast-paced, startup-like environment * Knowledge of developer tooling across ... and Java) * 4+ years of experience in open-source frameworks * 3+ years of experience with ...

Adaptive Security

Lead Software Engineer

New York, NY · On-site

$230K - $300K/yr

Adaptive is a cybersecurity startup on a mission to stop AI-powered cyberattacks. In December 2025 ... Strong development experience with modern, strongly-typed programming languages such as Java, C# ...

AccrueTalent

Staff Software Engineer

Manhattan, NY

$200K - $270K/yr

Fluent in one or more backend languages such as Python, Node.js, Java, or C/C++ -- Next.js and/or ... Meaningful equity and growth opportunities in a fast-growing AI healthcare startup * Comprehensive ...

Fortune

Salesforce Software Engineer

New York, NY

$180K/yr

Strong grounding in computer science fundamentals, programming (e.g., Java, C#, Python, or ... Experience in a startup or lean team environment whereyou'vebeen the primary Salesforce resource

Justworks

Front-end Engineer

New York, NY

... in the startup community. If you want to work in a fast paced environment, build something ... Ruby, Python, Java, etc) -Experience with at least one front-end javascript framework (React ...

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How much do java developer startup jobs pay per hour?

As of May 31, 2026, the average hourly pay for java developer startup in New York is $62.03, according to ZipRecruiter salary data. Most workers in this role earn between $53.65 and $69.42 per hour, depending on experience, location, and employer.

What is a Java Developer Startup job?

A Java Developer Startup job involves designing, developing, and maintaining Java-based applications in a fast-paced startup environment. Developers work on scalable solutions, collaborate with cross-functional teams, and adapt to evolving product requirements. Unlike corporate roles, startup jobs often require versatility, problem-solving skills, and the ability to work with limited resources.

What are the key skills and qualifications needed to thrive in the Java Developer Startup position, and why are they important?

A successful Java Developer in a startup environment should have strong proficiency in Java, object-oriented programming principles, and experience with frameworks like Spring or Hibernate, often backed by a degree in computer science or a related field. Familiarity with version control systems (like Git), CI/CD pipelines, and cloud platforms is highly valued, and industry certifications such as Oracle Certified Professional can be advantageous. Soft skills like adaptability, proactive problem-solving, and clear communication help developers collaborate in small, fast-paced teams. These competencies are essential for quickly delivering high-quality software and driving innovation in the dynamic startup landscape.

What kind of work environment and team structure can I expect as a Java Developer in a startup?

As a Java Developer in a startup, you'll typically work in a small, agile team where roles can be fluid and collaboration is highly encouraged. You may have the opportunity to work closely with product managers, designers, and other developers, allowing for greater input into the overall direction of the product. Daily responsibilities often extend beyond coding to include brainstorming sessions, code reviews, and quick iteration based on user feedback. The environment is fast-paced, offering opportunities for rapid skill development and taking on new responsibilities as the company grows. This setting is ideal for those who enjoy problem-solving, continuous learning, and making a direct impact on the product and business.
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Java Developer Startup jobs near you
Infographic showing various Java Developer Startup job openings in New York as of May 2026, with employment types broken down into 75% Full Time, 22% Part Time, and 3% Contract. Highlights an 68% Physical, 4% Hybrid, and 28% Remote job distribution, with an average salary of $129,021 per year, or $62 per hour.

Lead Application Security Engineer

Adaptive Security

New York, NY • On-site

$225K - $300K/yr

Full-time

Medical, Retirement, PTO

Posted 14 days ago

Job description

About Adaptive
NVIDIA and OpenAI's only AI cybersecurity investment.
Adaptive is a cybersecurity startup on a mission to stop AI-powered cyberattacks. In December 2025, the company announced an $81M Series B led by NVIDIA and Bain Capital Ventures, with participation from Capital One Ventures, Citi Ventures, and continued support from Andreessen Horowitz (a16z), the OpenAI Startup Fund, and Abstract Ventures. The round marked NVIDIA's first AI cybersecurity investment.
Adaptive was founded by Brian Long and Andrew Jones, repeat entrepreneurs who have built and scaled category-defining companies. Brian and Andrew previously co-founded Attentive, which grew to more than $500M in annual revenue and a $10B+ valuation, and TapCommerce, which was acquired by Twitter. Together, they bring deep experience building high-growth, product-led businesses at massive scale as Adaptive builds the security layer for the AI era.
Trusted by leading banks, technology companies, and healthcare organizations, Adaptive protects teams from emerging threats like deepfakes, smishing, and AI-powered voice scams. With rapid enterprise adoption and a $200B+ market ahead, the company is just getting started.
Role
Adaptive Security is the fastest-growing company in AI cybersecurity. We started by protecting organizations from AI-powered social engineering - deepfake phone calls, spear phishing, SMS-based threats - and we're now expanding into email security and browser security. Our customers integrate us deeply into their Google Workspace, Microsoft 365, and email infrastructure, and that attack surface is growing fast. We're a security company and our own security posture has to be best in class.
We're looking for an Application Security Engineer to own application security across Adaptive. You need to be a strong enough engineer to work inside our codebase (Java + Spring Boot services, TypeScript + React frontend, and terraform for managing AWS infrastructure) and a strong enough security practitioner to find what others miss. We want someone who finds the vulnerability, opens the PR to fix it, and builds the systems that prevent the next one.
Responsibilities
  • Own Adaptive's application security posture end-to-end. Define security standards for our products, infrastructure, and development process and make sure they're followed.
  • Conduct security reviews and threat modeling for new features, integrations, and architecture changes. Our attack surface is growing as we add deeper customer integrations and expand internationally.
  • Build security into CI/CD. Automate static analysis, dependency scanning, secrets detection, and container security so vulnerabilities are caught before they ship.
  • Perform penetration testing against our own applications and infrastructure. Find the bugs before external researchers or attackers do.
  • Drive vulnerability management across our application and infrastructure stack. Triage findings from automated tooling, pen tests, prioritize by risk, and push remediation to closure with engineering.
  • Lead security incident response process for application-layer events. When something happens, you lead the investigation and remediation.
  • Manage our approach to external security testing - bug bounty programs, third-party pen tests, and customer security assessments.
  • Own AWS security across our entire cloud architecture - IAM hardening, misconfiguration detection, and building the controls that keep our posture clean as the environment grows.
Qualifications
  • 5+ years of experience in application security, with demonstrated ability to find and exploit vulnerabilities in web applications and APIs (OWASP Top 10 and beyond).
  • Strong software engineering skills. You can read, write, and ship production code in Java, TypeScript, or similar languages.
  • Experience with cloud infrastructure security on AWS (IAM, VPC, ECS, S3, RDS, or equivalent services on other providers).
  • Hands-on experience with security tooling in CI/CD pipelines - SAST, DAST, SCA, container scanning, or similar.
  • Familiarity with compliance frameworks relevant to enterprise SaaS (SOC 2, HIPAA, GDPR) and the ability to translate compliance requirements into engineering work.
  • High autonomy. You're building this function from scratch and are expected to set priorities and drive them.

Compensation & Benefits:
  • Competitive cash compensation and meaningful stock.
  • Several medical plans to choose from, most covered at 100% by Adaptive.
  • 401k through Vestwell.
  • Unlimited PTO, including winter break from Dec 24 - Jan 1.
  • A fantastic office atmosphere including coffee, espresso, lounge, snacks, whiteboards, and tons of conference space.
  • Rotating choice of 4 free lunch options from local restaurants every day.
  • Expense dinner if you're in the office past 7pm. Expense Uber if you happen to stay past 9pm.

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