Software Engineering Manager

Harnham

United States

On-site

Manager

Software Engineering Manager, Growth

Location: Must be U.S. based. Strong preference for candidates based in EST or able to work core EST hours.

Role Overview

A mid-size, high-growth visual collaboration software company is seeking a Software Engineering Manager to lead its Growth Engineering team. This leader will own the experimentation engine that drives acquisition, conversion, and lifetime value across a product-led, consumer-driven motion.

Key Responsibilities

Lead a small, high-impact team of 5 engineers focused on product-led growth and experimentation across the funnel.
Own the growth engineering roadmap across acquisition, conversion, retention, and LTV in close partnership with Product, Marketing, and Data.
Design, implement, and analyze A/B and multivariate experiments end-to-end, translating learnings into clear product and roadmap decisions.
Scale the existing experimentation and A/B testing platform to handle roughly 10x current experiment volume.
Guide the team in building and shipping full‑stack features (Node.js/TypeScript preferred) that improve signup, onboarding, activation, engagement, and monetization.
Review technical specs, architecture proposals, and PRs, providing pragmatic, constructive feedback that unblocks engineers.
Contribute hands-on code when appropriate, particularly in early-stage projects or to frame complex technical work.
Own and optimize CAC for self‑serve acquisition in partnership with Growth and Marketing (paid channels, referrals, organic/SEO).
Instill a data‑driven culture: define funnel metrics, ensure robust instrumentation, and set guardrails for safe experimentation.
Coach and develop engineers through 1:1s, feedback, and career support, helping them grow while maintaining a high‑ownership culture.

Requirements

5+ years of professional software engineering experience shipping production code, ideally in a modern Node.js / TypeScript environment.
2+ years of engineering management or formal tech-lead experience with people management responsibilities.
Strong full‑stack foundation; comfortable diving into frontend, backend, and data layers to support the team.
Deep understanding of growth levers: acquisition, activation, conversion, retention, and LTV.
Demonstrated experience optimizing funnels and running experiments with clear, measurable business impact.
Proven ownership of A/B tests from hypothesis and design through implementation, rollout, and results interpretation.
Experience partnering with Marketing/Growth to manage and optimize CAC across self-serve channels.
Strong technical judgment and code quality bar; able to review specs and PRs and communicate trade‑offs clearly.
Excellent communication skills and cross‑functional collaboration experience in a SaaS or product-led environment.

Nice to have

Experience with Stripe integrations or other similar billing/subscription platforms.
Background in PLG environments or experimentation platforms focused on conversion optimization.
Prior experience in visual collaboration, productivity, or adjacent B2B SaaS products.
Familiarity with experimentation tooling, feature flagging, and growth analytics platforms.

About Harnham

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Harnham provides specialist Data and AI recruitment and staffing services, along with bespoke training solutions, across multiple industry verticals, operating in the UK, the USA and EU - contact us today to discuss your requirements: [email protected] Our recruitment and talent teams cover all aspects of the data and AI pipeline, from collection to consumption, across multiple data roles and functions. Whether you need full-time staff, contract talent, specialized training, Data-qualified graduates, or C-suite executives, Harnham Group is equipped to fulfill all your data talent requirements. Our five core services: * ATD - Rockborne – our graduate development arm – deploys expertly trained data consultants, who have gone through an intensive 12-week data training programme. After two years in the scheme, your consultant could become a * Contract / C2C / Freelance: Whether you're addressing a talent shortage, augmenting a project team, or encountering resource gaps, our specialist consultants offer bespoke interim talent solutions to address your unique challenges and drive success. * Full-Time / Direct Hiring: From early career professionals to senior management, our comprehensive services enable you to unearth outstanding data talent across various specializations, ensuring your organization thrives in the data-driven era. * Executive Search: With our dedicated executive search team and an extensive network encompassing the director to C-suite level, we assist both global corporations and ambitious startups in securing top-tier leadership talent to accomplish their goals. * GenAI, Prompt, LLM Training: Elevate your team's data expertise with our all-encompassing training programs covering essential tools and technologies such as Python, SQL, Machine Learning, LLM’s and AI. Highly bespoke, customised to your team learning requirements and budgets.