**๐Ÿ‘‹ Hi, Iโ€™m Jerin** Senior Full-Stack Developer based in the UK, helping startups and growing teams build reliable, scalable products. ๐Ÿš€ I work with founders to turn ideas into real, working software โ€” from early MVPs to production systems used by real customers. I enjoy owning work end-to-end and focusing on outcomes, not just implementation. My approach is collaborative and product-focused. I aim to feel like a trusted extension of your team, not just a contractor โ€” someone who communicates clearly, takes ownership, and helps move things forward ๐Ÿค **๐Ÿงฉ Experience** I bring 7+ years of hands-on experience delivering real-world software across startups, scale-ups, and freelance projects. - ๐Ÿ› ๏ธ Worked as a Senior Full-Stack Developer, delivering production systems, internal tools, and customer-facing applications - ๐Ÿš€ Helped founders ship startup MVPs and iterate quickly based on user feedback - ๐Ÿ“ฆ Owned features from idea to delivery, working closely with product and business teams - ๐Ÿ”„ Comfortable working independently or integrating seamlessly into existing teams - ๐Ÿ“ˆ Focused on building systems that are maintainable, scalable, and ready to grow Iโ€™m happy stepping in at any stage โ€” early ideation, active development, or improving an existing codebase. **๐Ÿค How I Work** I value clear communication, realistic timelines, and practical solutions. I keep things simple, transparent, and well structured so projects move forward without unnecessary friction โœจ If youโ€™re looking for someone who can balance speed and quality, Iโ€™d love to collaborate. **๐Ÿ”— Find Me Online** - ๐ŸŒ Portfolio: [_Website not available. Sign in: https://www.twine.net/signup_ - ๐Ÿ’ป GitHub: [_Website not available. Sign in: https://www.twine.net/signup_ - ๐Ÿ”— LinkedIn: [_Website not available. Sign in: https://www.twine.net/signup_ Buzzwords and over-promising โ€” just clear delivery, thoughtful work, and dependable results โœ…โ€ฆ

Jerin Sebastian

PRO
๎˜‚5.0 (1 review)

**๐Ÿ‘‹ Hi, Iโ€™m Jerin** Senior Full-Stack Developer based in the UK, helping startups and growing teams build reliable, scalable products. ๐Ÿš€ I work with founders to turn ideas into real, working software โ€” from early MVPs to production systems used by real customers. I enjoy owning work end-to-end and focusing on outcomes, not just implementation. My approach is collaborative and product-focused. I aim to feel like a trusted extension of your team, not just a contractor โ€” someone who communicates clearly, takes ownership, and helps move things forward ๐Ÿค **๐Ÿงฉ Experience** I bring 7+ years of hands-on experience delivering real-world software across startups, scale-ups, and freelance projects. - ๐Ÿ› ๏ธ Worked as a Senior Full-Stack Developer, delivering production systems, internal tools, and customer-facing applications - ๐Ÿš€ Helped founders ship startup MVPs and iterate quickly based on user feedback - ๐Ÿ“ฆ Owned features from idea to delivery, working closely with product and business teams - ๐Ÿ”„ Comfortable working independently or integrating seamlessly into existing teams - ๐Ÿ“ˆ Focused on building systems that are maintainable, scalable, and ready to grow Iโ€™m happy stepping in at any stage โ€” early ideation, active development, or improving an existing codebase. **๐Ÿค How I Work** I value clear communication, realistic timelines, and practical solutions. I keep things simple, transparent, and well structured so projects move forward without unnecessary friction โœจ If youโ€™re looking for someone who can balance speed and quality, Iโ€™d love to collaborate. **๐Ÿ”— Find Me Online** - ๐ŸŒ Portfolio: [_Website not available. Sign in: https://www.twine.net/signup_ - ๐Ÿ’ป GitHub: [_Website not available. Sign in: https://www.twine.net/signup_ - ๐Ÿ”— LinkedIn: [_Website not available. Sign in: https://www.twine.net/signup_ Buzzwords and over-promising โ€” just clear delivery, thoughtful work, and dependable results โœ…โ€ฆ

Available to hire

๐Ÿ‘‹ Hi, Iโ€™m Jerin

Senior Full-Stack Developer based in the UK, helping startups and growing teams build reliable, scalable products. ๐Ÿš€

I work with founders to turn ideas into real, working software โ€” from early MVPs to production systems used by real customers. I enjoy owning work end-to-end and focusing on outcomes, not just implementation.

My approach is collaborative and product-focused. I aim to feel like a trusted extension of your team, not just a contractor โ€” someone who communicates clearly, takes ownership, and helps move things forward ๐Ÿค

๐Ÿงฉ Experience

I bring 7+ years of hands-on experience delivering real-world software across startups, scale-ups, and freelance projects.

  • ๐Ÿ› ๏ธ Worked as a Senior Full-Stack Developer, delivering production systems, internal tools, and customer-facing applications

  • ๐Ÿš€ Helped founders ship startup MVPs and iterate quickly based on user feedback

  • ๐Ÿ“ฆ Owned features from idea to delivery, working closely with product and business teams

  • ๐Ÿ”„ Comfortable working independently or integrating seamlessly into existing teams

  • ๐Ÿ“ˆ Focused on building systems that are maintainable, scalable, and ready to grow

Iโ€™m happy stepping in at any stage โ€” early ideation, active development, or improving an existing codebase.

๐Ÿค How I Work

I value clear communication, realistic timelines, and practical solutions. I keep things simple, transparent, and well structured so projects move forward without unnecessary friction โœจ

If youโ€™re looking for someone who can balance speed and quality, Iโ€™d love to collaborate.

๐Ÿ”— Find Me Online

Buzzwords and over-promising โ€” just clear delivery, thoughtful work, and dependable results โœ…

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Experience Level

Expert
Expert
Expert
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Expert
Expert
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Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
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Language

English
Fluent

Work Experience

Founding Full Stack Developer at Minimal
August 1, 2025 - Present
โ€ข Architected and delivered a real-time fleet dashboard streaming live telemetry from vehicle fleets, using MQTT Brokers, GraphQL subscriptions / WebSocket pipelines and robust front-end state handling for smooth, high-frequency updates. โ€ข Designed and implemented typed backend-to-frontend contracts using GraphQL and Zod, improving iteration speed and reliability. โ€ข Built a reusable UI kit (charts/maps/tables) that reduced feature lead time โˆ’30% and standardized accessibility. โ€ข Implemented SSO using OIDC and designed tenant-aware RBAC permission models to support secure onboarding of enterprise customers across multiple regions. โ€ข Authored internal documentation for the real-time dashboard architecture and the collaborative editor. โ€ข Created internal CLI utilities and automation scripts to accelerate developer workflows, CI/CD deployments, and local environment setup, reducing onboarding time across teams. โ€ข Worked directly with enterprise customers and GTM teams to translate real-world developer workflows into product requirements and ship solutions rapidly in production environments. โ€ข Mentored junior engineers in frontend best practices, code quality, and test-driven development.
Senior Software Engineer at Timewatch PLC
November 1, 2023 - August 31, 2025
Led React + Node features for a multitenant product; spearheaded CI/CD + TDD, taking deploys from weekly to daily. Built backend services and automation tools using Python (Django/ FastAPI/Lambda handlers), focusing on reliability, observability, and developer productivity. Spearheaded full stack development using Node.js, Python, and React to deliver scalable, high-performance business-critical applications. Integrated customer authentication flows using OIDC-based SSO and implemented role-based access controls (RBAC) to meet enterprise security standards. Built internal APIs and developer-facing tools to streamline feature delivery, CI/CD pipelines, and cross-team collaboration. Pioneered AI integration initiatives by leading a cross-functional project to embed machine learning capabilities into multiple products, enhancing automation, performance, and user engagement.
Software Engineer at Freelancer
July 1, 2018 - June 30, 2023
โ€ข Delivered Next.js apps with SSR/ISR, React Query, and edge caching; typical TTFB <200ms on CDNs. โ€ข Engineered cloud-native solutions on AWS, Azure, and Google Cloud, emphasizing fault tolerance and continuous uptime. โ€ข Designed secure authentication flows including SSO/OIDC integration, granular RBAC, and audit logging for enterprise clients requiring governance and policy enforcement โ€ข Led the complete software development lifecycle from requirements gathering and architectural design to implementation and post-launch support, while standardizing best practices. โ€ข Mentored junior developers and fostered Agile methodologies across distributed teams, enhancing collaboration and accelerating project delivery. โ€ข Owned features from concept to production, gathering requirements, shipping MVPs, and iterating based on user feedback.

Education

MSc. Advanced Computer Science at University Of Sussex
September 14, 2022 - September 14, 2023
Bachelor of Technology (Engineering) โ€“ Computer Engineering at Lovely Professional University
August 1, 2016 - July 31, 2020

Qualifications

AWS Cloud Practitioner
January 11, 2030 - December 14, 2025
AWS Deep Racer: Reinforcement Learning
January 11, 2030 - December 14, 2025
AWS Certified Machine Learning โ€“ Specialty
January 11, 2030 - December 14, 2025

Industry Experience

Computers & Electronics, Consumer Goods, Education, Professional Services, Software & Internet, Travel & Hospitality, Transportation & Logistics, Non-Profit Organization, Retail, Real Estate & Construction