Forward Deployed Engineer (TypeScript / React / Node.js)

Harmony is an applied AI company for the front line of business: sales, customer success, and support. Companies run on conversations. Harmony captures, cleans, and structures them, privacy-first and compliant, and becomes the company's voice intelligence layer. It shows them what's really happening in their business and takes the work that follows each call off their plate.

We're 18 people across 3 continents. Repeat builders who love product, craft, and taste. We ship fast, decide fast, and move on.

About the role

Real product, real revenue, real users. We have paying enterprise clients on multiple continents, and Poland is the next market we're opening. We're going after BPOs, insurers, telcos, education and health businesses: teams of 50 to 100 people on calls all day, with a call recorder and a CRM already in place, and nobody listening to most of what's said.

Enterprise buyers here want to see it running on their own calls, in Polish, inside their own systems, before they sign. You'll scope a POC with a client on Monday and have it running on their data by Friday. Half engineering, half client-facing.

There's no local delivery team and no playbook to inherit. You'll write the integration, run the workshop, and answer the security questionnaire. You'll work directly with the founders and the product team, and as the Polish market grows, you'll help build the team that deploys here.

How you'll know it's working

• Polish clients see Harmony running on their own calls within a week of the first workshop.
• POCs you ran turn into signed contracts.
• Sales pulls you into deals at the first call, not after the demo.
• Integrations you built for one client get reused for the next, and deployment time drops with every account.
• Client ops and IT teams come to you directly and get answers the same day.

This isn't for you if

• You want to stay behind the code. Half this job is in the room, and some weeks it's more than half.
• You need a project manager between you and the client. There isn't one.
• You want a software-house rhythm: fixed scope, change requests, billable hours.

Stack

TypeScript, React, Node.js, PostgreSQL. Integrations with CRMs (HubSpot, Salesforce, Attio), support and contact-centre tools (Help Scout, Front, Kustomer, Talkdesk), and productivity platforms (Slack, Notion, Linear).

How we work

• Own it fully. See something broken? Fix it.
• Build the system, not just the thing. If you're doing it twice, automate it.
• Be direct, be kind.
• Ship it. A V1 with real users beats a V5 in a slide deck.
• Stay curious, stay humble.

What we offer

• Equity
• Growth and ownership: build deployment in Poland well and you'll lead it as it scales.
• B2B contract, full-time.
• 30 paid days off a year.

When you apply, include one deployment you're proud of: an integration, a POC that became a deal, or a Loom walking through a messy rollout. Tell us what was at stake and how it ended. English or Polish, both fine.

Process: Intro call → Technical interview → Paid working period (full rate) → Offer.

Zakres obowiązków

• Own client deployments end to end: discovery, scoping, building, deploying, iterating, and the production issue at 4pm on a Thursday.
• Turn POCs into contracts. Stand Harmony up on a client's real calls in days, so the buyer sees it working on their data before procurement starts.
• Build integrations in TypeScript across the full stack. Connect Harmony to CRMs, contact-centre and telephony systems, and internal tools. Production code, not glue scripts.
• Configure what the client actually measures. Translate a Head of CX's quality standard into questions and scorecards that run on every call, in Polish.
• Make calls in the room. Sit with ops leaders, IT, and security, understand the problem, and propose the solution on the spot.
• Feed the product. What you build twice for clients becomes product, so the next deployment takes half the time.
• Move fast with AI. Use every tool available. We care about what ships, not how you got there.

Wymagania

Must have

• Strong TypeScript, full stack. React + Node.js. You've shipped production applications used by real companies.
• Enterprise client experience in a technical, client-facing role: implementation, solutions engineering, or delivery at a software house. You've sat across from a CTO, an ops director, and procurement, and you know how to listen, scope, and deliver.
• Integrations are familiar pain. APIs, webhooks, data syncing, SSO, the legacy system nobody documented.
• Fluent Polish and English. Client workshops in Polish, team sync in English, written proposals in both.
• AI-native. You build with AI daily, and you can explain to a skeptical IT director exactly what it does and what it doesn't.
• Based in Poland, and happy to be in the client's office when it matters.
• You own the outcome, not the ticket. Low ego, no theatre.

Nice to have

• Previous FDE, Solutions Engineer, or Sales Engineer role at a SaaS vendor selling into Polish enterprises.
• Contact-centre, telephony, or CX tooling experience (Genesys, Five9, Thulium, Focus Telecom, or similar).
• You've been through a security review in a regulated industry (insurance, banking, health) and the deal still closed.
• Experience with voice, transcription, or conversation data.

Tech stack

• TypeScript
• React
• Node.js
• REST API
• PostgreSQL