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Junior Developer Startup Jobs (NOW HIRING)

Junior AI Engineer

Lawrence, NY · On-site

$85K - $110K/yr

Junior engineers who join now won't just execute tasks - they'll learn by doing, work directly ... Grow quickly by tackling a wide range of problems across the stack in a startup environment

Junior AI Engineer

Lawrence, NY · On-site

$85K - $110K/yr

Junior engineers who join now won't just execute tasks - they'll learn by doing, work directly ... Grow quickly by tackling a wide range of problems across the stack in a startup environment

We are seeking a Junior Process Engineer with 2+ years of experience who is eager to grow their ... Support commissioning, startup activities, and field engineering tasks when required Safety ...

This role is ideal for an early-career scientist or engineer interested in developing expertise in ... Experience supporting startup, commissioning, or operational readiness activities. Competencies We ...

This role is ideal for an early-career scientist or engineer interested in developing expertise in ... Experience supporting startup, commissioning, or operational readiness activities. Competencies We ...

Junior Process Engineer At this time, we are not able to offer current or future work authorization ... Support during startup and set up * Maintains professional and technical knowledge by attending ...

Junior Process Engineer At this time, we are not able to offer current or future work authorization ... Support during startup and set up * Maintains professional and technical knowledge by attending ...

Python Developer

$51.50 - $71/hr

Help recruit, develop, and mentor junior developers. * Foster the client engineering team brand and ... Ability to thrive in a fast-paced startup. * Someone who loves to learn and is passionate about ...

Junior Software Developer

Eagle, ID · On-site

$64K - $83K/yr

Crelate, a fast-growing startup with over 1,500 customers, is seeking a Junior Software Developer to join our growing team. You will be an important part of our product and migration teams. This role ...

Junior Software Developer

Eagle, ID

$64K - $83K/yr

Crelate, a fast-growing startup with over 1,500 customers, is seeking a Junior Software Developer to join our growing team. You will be an important part of our product and migration teams. This role ...

Junior Software Developer

Eagle, ID · On-site

$64K - $83K/yr

Crelate, a fast-growing startup with over 1,500 customers, is seeking a Junior Software Developer to join our growing team. You will be an important part of our product and migration teams. This role ...

Python Developer

$51.50 - $71/hr

Help recruit, develop, and mentor junior developers. * Foster the client engineering team brand and ... Ability to thrive in a fast-paced startup. * Someone who loves to learn and is passionate about ...

Python Developer

Jersey City, NJ · On-site

$55 - $75.75/hr

Help recruit, develop, and mentor junior developers. * Foster the client engineering team brand and ... Ability to thrive in a fast-paced startup. * Someone who loves to learn and is passionate about ...

Python Developer

Jersey City, NJ · On-site

$55 - $75.75/hr

Help recruit, develop, and mentor junior developers. * Foster the client engineering team brand and ... Ability to thrive in a fast-paced startup. * Someone who loves to learn and is passionate about ...

Python Developer

$51.50 - $71/hr

Help recruit, develop, and mentor junior developers. * Foster the client engineering team brand and ... Ability to thrive in a fast-paced startup. * Someone who loves to learn and is passionate about ...

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Junior Developer Startup information

See salary details

$24K

$89K

$137.5K

How much do junior developer startup jobs pay per year?

As of Jul 16, 2026, the average yearly pay for junior developer startup in the United States is $88,976.00, according to ZipRecruiter salary data. Most workers in this role earn between $67,000.00 and $87,000.00 per year, depending on experience, location, and employer.

What is a Junior Developer Startup job?

A Junior Developer Startup job involves working as an entry-level software developer in a fast-paced startup environment. You'll likely assist in coding, debugging, and testing software while collaborating with a small team. Startups often require developers to be adaptable, learn quickly, and take on various responsibilities beyond coding. This role provides great exposure to modern technologies and agile development practices. It’s a valuable opportunity to grow your skills and gain hands-on experience in a dynamic setting.

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

To thrive as a Junior Developer at a startup, you need foundational knowledge of programming languages (such as JavaScript, Python, or Ruby), basic understanding of web development, and a degree in computer science or related experience. Familiarity with source control systems like Git, cloud services, and popular frameworks is important, and participation in coding bootcamps or relevant certifications is a plus. Strong problem-solving, adaptability, and effective communication are key soft skills for collaborating in a dynamic, fast-paced environment. These abilities help junior developers quickly learn, contribute to product development, and grow within the rapidly evolving startup landscape.

What are some common challenges a Junior Developer may face when working at a startup?

Junior Developers in startup environments often encounter rapid changes in project direction, shifting priorities, and the need to learn new technologies quickly. Unlike more established companies, startups may have less formalized onboarding and training, requiring you to take initiative and learn on the go. You'll likely collaborate closely with small, cross-functional teams, which means communication skills and flexibility are essential. Embracing these challenges can accelerate your growth, expand your technical skill set, and offer opportunities to make a direct, visible impact on the company's products.

More about Junior Developer Startup jobs
What cities are hiring for Junior Developer Startup jobs? Cities with the most Junior Developer Startup job openings:
What are the most commonly searched types of Developer Startup jobs? The most popular types of Developer Startup jobs are:
What states have the most Junior Developer Startup jobs? States with the most job openings for Junior Developer Startup jobs include:
Infographic showing various Junior Developer Startup job openings in the United States as of July 2026, with employment types broken down into 87% Full Time, and 13% Part Time. Highlights an 74% In-person, 13% Hybrid, and 13% Remote job distribution, with an average salary of $88,976 per year, or $42.8 per hour.
JR AI Agentic Developer

JR AI Agentic Developer

Trillion Technology Solutions

Reston, VA • On-site, Remote

$69K - $90K/yr

Full-time

This job post has expired today. Applications are no longer accepted.


Job description

Professional Summary

Junior developer (0–3 years) with hands-on experience designing and shipping agentic AI systems. Fluent with AI-assisted development tooling (Cursor, Claude Code) and comfortable building production Python services. Strong command of core agentic concepts - ReAct loops, plan-and-execute, orchestrator-worker patterns, tool/function calling, short- and long-term memory, and multi-agent handoffs - with the judgment to know when an agent is the right architecture and when a deterministic workflow is. Startup experience and supply chain or ERP domain exposure are significant differentiators.

Core Skills (Required)

• Agentic Frameworks: LangChain / LangGraph (state graphs, checkpointing, conditional edges, human-in-the-loop) or CrewAI (role-based crews, task delegation, sequential and hierarchical processes)

• Agentic AI Concepts: ReAct, plan-and-execute, reflection, tool calling and schema design, memory management, context-window strategy, guardrails, and agent evaluation

• AI Development Tooling: Cursor, Claude Code, MCP servers, prompt iteration and debugging

• API Development: FastAPI - async endpoints, Pydantic models, dependency injection, SSE/streaming responses, background tasks; used to expose agent workflows as production services

• Programming: Python (async/await, typing, pytest), Git, Docker

• Location: open to candidates anywhere in the United States; remote, hybrid, or onsite. Must be authorized to work in the U.S.

Preferred Skills

• n8n: workflow orchestration, webhook triggers, scheduled runs, integrating agents with external systems and business tooling

• RAG: chunking strategies, embeddings, hybrid (semantic + keyword) search, re-ranking, citation grounding, retrieval evaluation

• Vector Databases: pgvector, Pinecone, Qdrant, Weaviate, or Chroma

• Graph Databases: Neo4j and Cypher; GraphRAG and knowledge-graph-backed retrieval

• Kubernetes: containerization, Helm charts, deploying and scaling agent services on a cluster

• Startup Experience: early-stage or small-team background - comfortable with ambiguity, owning a feature end to end, moving from prototype to production quickly, and wearing multiple hats without waiting for process

• Supply Chain Domain: exposure to supply chain, procurement, logistics, or ERP systems (Oracle, SAP, NetSuite) - understanding of purchase orders, suppliers, inventory, demand planning, and fulfillment workflows

Trillion is an equal opportunity employer. Applicants are considered for positions without regard to race, religion, gender, native origin, age, disability, or any other category protected by applicable federal, state, or local law.