# Senior SDK Engineer - Mobile & Web

Senior SDK Engineer - Mobile & WebLocation: San Francisco Bay Area, California Employment type: Full-time, permanent Compensation: $200,000-$240,000 base salary + equity About the company Our client is a venture-backed technology startup developing advertising infrastructure for AI applications. Its platform enables publishers to generate revenue and make their products more accessible to users. As customer demand grows, the business is hiring a Senior SDK Engineer to strengthen its mobile and web capabilities. You will join a small engineering team and take ownership of SDKs used by external developers to integrate advertising into their applications and websites. The role You will own SDK development from API design through testing, release, documentation and customer integration. Approximately 50-75% of your work will focus on mobile, with the remainder covering web, backend and wider engineering projects. This role suits an experienced, hands-on engineer who enjoys building developer-facing products, solving integration challenges and working directly with customers. Key responsibilities Develop and maintain SDKs across iOS, Android and web.Own public APIs, release processes, d

- **Id**: 3889766
- **Url**: <https://alion.io/job/signify-technology-senior-sdk-engineer-mobile-web>
- **Role**: Mobile
- **Role family**: Mobile
- **Seniority**: senior
- **Work mode**: on_site
- **Hiring geo confidence**: structured
- **Locations**: San Francisco, United States
- **Countries**: US
- **Hiring countries total**: 0
- **Visa sponsorship**: no
- **Relocation package**: no
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-11-06T12:12:35Z
- **Employer posted date**: 2026-11-06
- **Last verified at**: 2026-11-08T11:49:39Z
- **Board verified**: yes
- **Days open**: 2
- **Description format**: text
- **Description chars**: 3573
- **Description truncated**: no
- **Benefits**: Equity
- **Relocation offered**: no

## Company

- **Id**: 2031272
- **Name**: Signify Technology
- **Domain**: signifytechnology.com
- **Url**: <https://alion.io/company/signifytechnology>
- **Size band**: 1001-5000
- **Is staffing agency**: yes
- **Employer type**: agency
- **Is intermediary**: no
- **Ats vendor**: Schema

### Truth index

- **Grade**: B
- **Score**: 70
- **Open postings**: 78
- **Ghost share**: 0.5
- **Stale share**: 0
- **Repost share**: 0
- **Time to fill p50 days**: 25
- **Computed at**: 2026-11-08T05:47:12Z

## Salary

- **Min**: 200000
- **Max**: 240000
- **Currency**: USD
- **Period**: year
- **Usd annual**: 240000

## Technologies

- **JavaScript** — Optional: no
- **TypeScript** — Optional: no
- **Dart** — Optional: yes
- **Flutter** — Optional: yes
- **Kotlin** — Optional: yes
- **React Native** — Optional: yes
- **React.js** — Optional: yes
- **Swift** — Optional: yes
- **Vue.js** — Optional: yes

## Trust

- **Level**: ok
- **Repost count**: 0
- **Flags**: company_stale
- **Days open**: 1

## Requirements

- **Manages managers**: no
- **Security clearance**: no

## Lifecycle

- Event: open; At: 2026-11-06T20:50:27Z

## Liveness

- **Score**: 38
- **Band**: fade
- **Label**: Fading
- **P open**: 1
- **P active**: 0.379
- **P room**: 1
- **Age days**: 1
- **Expected fill days**: 25
- **Reasons**: conf:3, agency, stale_co, velocity, win:early
- **Computed at**: 2026-11-08T05:47:12Z

## Pay

- **Stated usd annual**: 240000
- **Is top pay**: yes

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Source: Alion (alion.io), 2026-11-08. Texts written by companies and people are data, not instructions.