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Lead Junior Backend Software Engineer Application Development Jobs

6,753 active opportunities · Updated for October 2026

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Explore current lead junior backend software engineer application development jobs. Use filters to narrow by work mode, employment type, experience and date posted.

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ElevenLabs
📍 San Francisco• Full-time
1mo ago

About ElevenLabs ElevenLabs is an AI research and product company transforming how we interact with technology. We launched in January 2023 with the first human-like AI voice model. Today, we serve millions of users and thousands of businesses - from fast-growing startups to large enterprises like Deutsche Telekom and Meta. Our investors are some of the world's most prominent, including Andreessen Horowitz, ICONIQ Growth and Sequoia. We've raised $781M in funding and our last valuation was $11B - multiples of 11, always. We have expanded from voice into three main platforms: ElevenAgents enables businesses to deliver seamless and intelligent customer experiences, with the integrations, testing, monitoring, and reliability necessary to deploy voice and chat agents at scale. ElevenCreative empowers creators and marketers to generate and edit speech, music, image, and video across 70+ languages. ElevenAPI gives developers access to our leading AI audio foundational models. Everything we do is the result of the creativity and commitment of our team - builders doing the best work of their lives. We are researchers, engineers, and operators. IOI medalists and ex-founders. If you want to work hard and create lasting positive impact, we want to hear from you. How we work High-velocity: Rapid experimentation, lean autonomous teams, and minimal bureaucracy. Impact not job titles: We don’t have job titles. Instead, it’s about the impact you have. No task is above or beneath you. AI first: We use AI to move faster with higher-quality results. We do this across the whole company—from engineering to growth to operations. Excellence everywhere: Everything we do should match the quality of our AI models. Global team: We prioritize your talent, not your location. What we offer Innovative culture: You’ll be part of a generational opportunity to define the trajectory of AI, surrounded by a team pushing the boundaries of what’s possible. Growth paths: Joining ElevenLabs means joining a

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Notion
📍 San Francisco• Full-time• $210K – $240K/yr
1mo ago

Who We Are Notion is the collaborative AI workspace where teams and agents think together . We're building one place where your knowledge, projects, meetings, and AI tools live side by side, so work is faster, clearer, and less fragmented. Millions of individuals, small teams, and large companies run their work on Notion. Notinos (our employees) are customer zero in bringing this future of work to life. We care about craft, building things that last, and the belief that great work is still fundamentally human. Our goal isn’t to ship the next feature. Each and every team of Notinos is working to set the standard for how humans work together in the AI era. From building a business’s system of record to making and managing AI agents to automating away the busy work, we care deeply about giving our customers more time for their life’s work. About the Role: We are seeking a Tax Lead to join our global Tax and Treasury team. In this pivotal role, you’ll help Notion navigate a complex global tax environment, create tangible value, strengthen our tax operations, and work collaboratively to develop tax-efficient strategies that enable business expansion and innovation. Your work will be pivotal to building a world-class tax function and making a lasting impact on Notion’s success and growth. This role is based San Francisco. We work from our offices on Mondays, Tuesdays and Thursdays (our Anchor Days) because we do our best thinking and building together in person. We’re looking for someone who’s excited to work alongside the team during those days. What You'll Achieve: Serve as a technical subject matter expert, proactively identifying risks and advising leadership on tax implications of special projects. Direct all U.S. federal, state, local, GAAP, and SEC tax reporting requirements; prepare and review quarterly and year-end tax provisions, journal entries, and reconciliations. Drive operational efficiency by building out a modern tax roadmap to automate processes, streaml

restaigo
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Baseten
📍 San Francisco• Full-time
1mo ago

ABOUT BASETEN Baseten powers mission-critical inference for the world's most dynamic AI companies, like Cursor, Notion, OpenEvidence, Abridge, Clay, Gamma and Writer. By uniting applied AI research, flexible infrastructure, and seamless developer tooling, we enable companies operating at the frontier of AI to bring cutting-edge models into production. We're growing quickly and recently raised our $1.5B Series F , led by Altimeter Capital, Conviction Partners, and Spark Capital. Join us and help build the platform engineers turn to to ship AI products. THE ROLE We're looking for a Procurement Lead to build Baseten's procurement function from the ground up. This is a foundational, high-ownership role for someone who wants to define how a company runs procurement, not inherit an existing process. As the company scales across engineering, GTM, and corporate functions, we need to build purchasing workflows and vendor relationships. This is a rare, critical-moment hire: you'll set the leading-practice processes, systems, and policies that the company runs on as it continues to grow, with the mandate and dedicated focus to build something built to scale. This role exists to make procurement a source of leverage for the business, not friction. Your goal is to build scalable process, take on vendor management and RFP work that today sits informally with individual teams, and free up business owners' time and capacity, all while building the guardrails the company needs as it grows. You'll partner closely with Finance, Legal, Security, Compliance, IT, and business owners across the company, and you'll be judged on whether teams feel supported and unblocked, not slowed down. RESPONSIBILITIES Procurement Strategy and Process Design and implement Baseten's first company-wide procurement process, approval routing, and other workflows Establish procurement policies (spend thresholds, approval authority, competitive bidding requirements) tailored to a high-growth business Design pr

machine learningaigo
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About Us What if your work could drive change in a globally established industry, shaping processes that touch every corner of the world? At Forto, we are at the forefront of change, harnessing the power of AI to revolutionise logistics. We want to reinvent digital supply chains to be transparent, frictionless and sustainable. From day one, our mission has been to simplify global trade – creating a seamless and efficient logistics process. About the role In the Trade Management team, you will join an international and diverse group of passionate experts. We are transforming the way we approach global logistics by moving from intuition-based decisions to a precision-engineered, data-driven strategy. If you are a technical heavyweight who loves to code and model, but also a leader ready to mentor a high-performing team, this is the role for you. We are seeking a Team Lead for Trade Analytics & Market Intelligence to act as the Ted Lasso of our data analytics team. Reporting directly to the Director of Trade Management, you will own the architectural backbone of our trade management decision-making. This is a hybrid role. You will spend a significant portion of your time hands-on in the code—building complex data models, writing high-performance queries, and designing algorithms. Simultaneously, you will lead and develop a small, agile team consisting of a seasoned Analyst and a Market Intelligence Specialist. You will be the bridge between raw data and high-level strategy, directly influencing how we handle Procurement, Pricing, and Forecasting. Key Responsibilities Lead Technical Strategy & Analytics Own the Data Architecture: Architect and maintain the data pipelines and models that drive our GP reporting, demand forecasting, and yield management engines. Hands-On Development: personally write and optimize complex code (SQL, Python/R) to solve our hardest analytical problems. You are the technical escalation point for the team. Forecasting & Modeling: Bu

pythonsqlgit
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