Tech Lead / Senior Fullstack TypeScript Developer
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Job Description
Remote development roles on HireSkys cover frontend, backend, full-stack, DevOps, and QA work. Employers here usually name their exact stack in the description — compare the required tools against your own experience before applying, and use the Skill Gap Analyzer below to spot what to learn next.
Key Skills Required
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We’re looking for a Tech Lead or a Senior Fullstack TypeScript Developer to join our team.
👉 The role starts as a Senior Developer, then evolves into a Tech Lead position after 3-6 months, once you’ve proven yourself in the squad.
You’ll design, build, and ship features across frontend and backend, improve performance, and progressively take leadership within your squad to set technical standards, mentor peers, and drive delivery.
What you’ll do
Build new features end-to-end (frontend + backend) by working hand-in-hand with a strong Product team
Improve the codebase (refactoring, bug fixes, optimization)
Collaborate with the rest of the team to solve technical issues
Mentor fellow developers, share knowledge, and raise the bar
Step up as Tech Lead in your squad: drive quality, make technical choices, and align delivery
What success looks like
Within 3 months
You’re fully onboarded and comfortable in our stack
You’ve shipped meaningful features in production
You’ve contributed to improving our codebase
Within 6 months
You’ve led delivery of multiple successful projects
You’ve had direct impact on scalability & performance
You’ve grown into your Tech Lead role and mentor others
What’s in it for you
Join a bootstrapped, profitable, fast-growing SaaS company
Build products used by thousands of businesses worldwide
See your impact quickly with a very short feedback loop
Work with senior engineers who love to learn and share knowledge
Remote-first culture (office in Paris if you prefer 🇫🇷)
No endless meetings, high autonomy, big impact
About you
Must have
8+ years in TypeScript / JavaScript (frontend + backend)
Solid skills in Node.js, React, MongoDB
Proven track record building & maintaining web apps
Always hungry to learn more, particularly around JS/TS
Autonomous, fast learner, and collaborative
Fluent in French & English, based in French timezone (+/- 2h)
Nice to have
B2B SaaS startup experience
You worked on a SaaS that scaled massively
You are familiar with advanced performance optimization
Self-taught hacker or side-project builder
Passionate about experimenting & creating beyond work
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lemlist
View Company Profilelemlist (operating at lemlist.com) is an AI-powered sales engagement platform engineered for precision outbound and multichannel outreach. Founded in 2018 by Guillaume Moubeche, Francois Lecroart, and Vianney Lecroart, and headquartered in Paris, France, lemlist solves the challenge of generic, low-response outreach by automating lead discovery, personalization, and campaign execution across email, LinkedIn, calls, and WhatsApp. Under the hood, its AI agents detect buying signals, enrich leads, and provide sales reps with contextual insights to tailor messaging. This allows B2B companies to scale relevant conversations, improve reply rates, and drive revenue growth. The company is bootstrapped, profitable, and serves over 20,000 customers.
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