Founding Senior Software Engineer

Posted Yesterday
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Herzliya, ISR
In-Office
Senior level
Mobile • App development
Mobile & web development, and team extension service for clients in IoT, SDK, health, finance, automotive, AI and more.
The Role
Join as a founding senior software engineer to design, build, and own full-stack features: scalable backend services, APIs, React frontends, PostgreSQL data models, and production systems. Collaborate with founders on architecture, contribute to engineering practices, infrastructure, and AI-assisted workflows, and drive features end-to-end in an early-stage FinTech environment.
Summary Generated by Built In
Description

A growing early-stage FinTech startup company, building a next-generation financial platform for companies, is looking for its Founding Senior Software Engineer to join the founding team and play a key role in shaping the product, architecture, and engineering culture from the ground up.

This is a unique opportunity for a senior engineer who enjoys ownership, technical challenges, and building impactful products in a highly hands-on environment.

Responsibilities

  • Design, develop, and own core features across the full stack.
  • Build scalable backend services, APIs, and data workflows.
  • Develop React-based frontend applications.
  • Design reliable PostgreSQL data models and ensure data integrity.
  • Take ownership of features from concept to production.
  • Collaborate with the CTO and founders on architecture and product decisions.
  • Contribute to engineering practices, infrastructure, and AI-assisted development workflows.
Requirements
  • 5+ years of professional software engineering experience.
  • Strong full-stack development background with hands-on experience with React and Rust (or similar technologies).
  • Experience building production-grade web applications and scalable systems.
  • Deep understanding of PostgreSQL, relational data modelling, transactions, and data integrity.
  • Experience designing reliable systems where correctness and consistency are critical.
  • Ability to independently drive projects end-to-end with high ownership.
  • Strong product mindset and ability to work closely with non-engineering stakeholders.
  • Comfortable working in an early-stage startup environment with ambiguity and changing priorities.
  • Experience using modern AI development tools and AI-assisted workflows.

Advantages

  • Previous experience as a Founding Engineer/early-stage startup engineer/ taking products from 0→1.
  • Experience in FinTech, financial systems, equity compensation, financial markets, data analytics, statistics, or other regulated industries.
  • Experience with cloud infrastructure and DevOps.

Skills Required

  • 5+ years of professional software engineering experience
  • Strong full-stack development background with hands-on experience with React and Rust (or similar)
  • Experience building production-grade web applications and scalable systems
  • Deep understanding of PostgreSQL, relational data modelling, transactions, and data integrity
  • Experience designing reliable systems where correctness and consistency are critical
  • Ability to independently drive projects end-to-end with high ownership
  • Strong product mindset and ability to work closely with non-engineering stakeholders
  • Comfortable working in an early-stage startup environment with ambiguity and changing priorities
  • Experience using modern AI development tools and AI-assisted workflows
  • Previous experience as a founding or early-stage engineer, taking products from 0->1
  • Experience in FinTech, financial systems, equity compensation, or regulated industries
  • Experience with cloud infrastructure and DevOps
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The Company
HQ: Herzliya
51 Employees
Year Founded: 2010

What We Do

Founded in 2010, Gini-Apps is an israeli tech company specializing in web and mobile applications, as well as outsourcing and R&D talent placement services. Every day, our team shows up with one clear mission: to build digital products people genuinely love to use and also to empower companies with the skilled professionals they need to grow. Millions of people use our apps every day. Transforming any digital into elegant, practical and revenue-driving tech solutions is our secret power From concept to launch and beyond, every product we create strives to achieve two goals: We want users to love it, and we want you to generate revenue from day one. Co-Founders Shay Somech | CEO Mobile, Desktop and web developer for the last 20+ years with a background of IDF airforce electronic engineering on F15 aircraft. Massive app user, familiar with many apps & technologies worldwide. Early adapter for technological products and gadgets. Tamir Avrahamov | CTO Mobile strategy & technology advisor for startups and enterprises, strong hands-on and architectural vision.

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